2023 ANNUAL REPORT Our Purpose To Turn Raw Potential into Real Progress Our purpose informs every goal we set, decision we make, action we take, and strategy we implement. It supports our goal to unlock the true potential of our people, products, and processes. Our Values • Act with Integrity • Operate with Excellence • Care for People • Lead with Courage Our values are clear and concise, setting the expectation for how we endeavor to operate around the globe, in every aspect of our business and in every market. ON THE COVER Alcoa aluminum ingots produceed in Mosjøen, Norway. Who We Are Alcoa is active in all aspects of the upstream aluminum industry with bauxite mining, alumina refining, and aluminum smelting and casting. At the end of 2023, we had direct and indirect ownership of 27 locations across nine countries on six continents. Our more than 13,000 employees call themselves Alcoans. To be an Alcoan means being part of a high-performance culture, where we hold each other accountable for consistent improvement— pushing to innovate and move forward. We consistently work to build upon our history, which began in 1886 with the world-changing discovery that made aluminum an affordable and vital part of our modern lives. Where We Operate (as of December 31, 2023) ALCOA LOCATIONS JOINT VENTURES, NON-OPERATING PARTNER Willowdale, Australia Huntly, Australia Pinjarra, Australia Wagerup, Australia Kwinana, Australia* Portland, Australia Poços de Caldas, Brazil São Luís (Alumar), Brazil Juruti, Brazil Baie-Comeau, Canada Deschambault, Canada Bécancour, Canada Fjarðaál, Iceland Lista, Norway Mosjøen, Norway San Ciprián, Spain Massena, United States Warrick, United States Lake Charles, United States Estreito, Brazil Barra Grande, Brazil Machadinho, Brazil Serra do Facão, Brazil Manicouagan, Canada Compagnie des Bauxites de Guinée, (CBG), Guinea Ma’aden, Saudi Arabia Strathcona, Canada * In January 2024, the Company announced the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. Bauxite Alumina Aluminum Smelting Aluminum Casting Energy Calcined Coke Our Business Segments Beginning in 2023, Alcoa combined the activities of its bauxite mines and alumina refineries into the Alumina segment, and the Company reports financial results in two business segments: Alumina and Aluminum. ALUMINA This segment consists of the Company’s worldwide refining system, including the mining of bauxite, which is then refined into alumina. The Company produces smelter grade alumina and non-metallurgical grade alumina. Alcoa’s alumina sales are made to customers globally, including its own aluminum smelters. Non-metallurgical grade alumina is sold to third-party customers who process it into industrial chemical products. ALUMINUM This segment includes the Company’s worldwide smelting and casthouse system as well as a portfolio of energy assets in Brazil, Canada, and the United States. The smelting operations produce molten primary aluminum, which is then formed by the casting operations into either common alloy ingot such as t-bar, sow, and standard ingot or into value add ingot products such as foundry, billet, rod, and slab. The energy assets supply power to external customers in Brazil and the United States, as well as internal customers in the Aluminum segment (Baie-Comeau (Canada) smelter and Warrick (Indiana) smelter), and, to a lesser extent, the Alumina segment (Brazilian refineries). The Alumina and Aluminum segments include Alcoa’s 25.1 percent share of the Ma’aden Bauxite and Alumina Company and the Ma’aden Aluminium Company, respectively. Letter from the Chairman of the Board Dear Stockholders, Since our inception as a pure-play, upstream aluminum company in 2016, Alcoa has been focused on driving stockholder value by creating an optimized portfolio of assets supported by a strong balance sheet. We are proud to be active in all aspects of the upstream aluminum industry, with bauxite mining, alumina refining, aluminum smelting and casting. We produce materials that are key for global decarbonization efforts and the related energy transition. Long-term forecasts predict continued aluminum demand increases, both from primary and recycled sources. While the long-term prospect for our industry is very promising, we know we must focus now, and every day, on being well positioned for this growth. Put simply, meeting the demands of the future requires an even higher level of performance today. In September, the Board of Directors appointed William F. Oplinger as Alcoa’s President and Chief Executive Officer. Bill succeeds Roy C. Harvey, who served as Chief Executive Officer since November 2016 and as President since May 2017. We appreciate Roy’s years of service and his work to make Alcoa stronger and more resilient. Our Board has confidence in Bill’s leadership abilities and business acumen to lead this organization now. Bill has deep roots at Alcoa, serving previously as Chief Financial Officer from November of 2016 to February 2023, when he was named Chief Operations Officer. Following a smooth leadership transition, Bill, as President and CEO, is bringing renewed energy, inspiring our teams across the globe to act with a deliberate focus on operating with excellence. He and his team are focused on a performance-based culture with action-oriented, empowered employees who deliver results aligned with Alcoa’s three strategic priorities: reduce complexity, drive returns, and advance sustainably. Together, we are keenly focused on rigorous plans, both for the near-term and mid-term, to increase the competitiveness of our plants and business, which is imperative for a commodity-based industry. Also, we continue to innovate for long-term benefit. Our technology roadmap, as an example, includes research and development projects that have the potential to revolutionize our industry and enable decarbonization. What we do at Alcoa today matters for tomorrow—for our employees, our investors, and our communities. Our steadfast commitment to operational excellence and financial success will enable us to realize our strategic objectives and to turn raw potential into real progress. Thank you for your continued support. Steven W. Williams chairman of the board 2 Letter from the President and CEO Dear Stockholders, I am honored to lead Alcoa, a company with an inspiring history and a promising future. Our employees invented this industry, and we recognize the potential of Alcoa and the role we play in delivering a critical material for today’s and tomorrow’s economy. We aim to be the world’s premier upstream aluminum producer. Though 2023 was a challenging year, we’ve set a clear strategy for improvement. Our markets are cyclical, and we understand the need to succeed through all market conditions. We are making progress across many fronts. We made year-over-year gains in 2023 in our key safety metrics. We also set production records across our smelters in Canada (Baie Comeau, Becancour and Deschambault) and in Norway (Mosjøen). At year’s close, we obtained approvals for bauxite mining in Western Australia and appointed a new Chief Operations Officer. Earning approval for our bauxite mining in Australia was our top objective, and that positive outcome provides clarity for the future. Moving forward, we know more needs to be done. So we are taking actions designed to position Alcoa for the future and improve our profitability, driving both near-term and medium-term improvements. We expect year-over-year savings in 2024 for raw materials, both from market improvement and actions from our procurement teams. We’ve also implemented a global productivity and competitiveness program that aims to reduce controllable operating costs across our organization. Further, we continue work to improve the performance of our asset portfolio. We announced in January of 2024 the curtailment of our Kwinana refinery in Western Australia, and we continue to progress actions at a number of other locations. We have started discussions with stakeholders in Spain to find a long- term solution for the San Ciprián smelter and refinery, which remain unprofitable. Our mid-term actions, beyond 2025, include realizing benefits from expected moves into new mine regions in Western Australia and continuing to position our Company for a low-carbon economy. Diligent environmental management, strong social performance, and excellent governance practices remain fundamental to our overall business strategy to enable long-term value creation. Being a premier aluminum company requires leadership. We have a skilled team driving improvements today while laying the groundwork for an even better future. We are working to deliver our fullest potential, aligned with Alcoa’s values to act with integrity, operate with excellence, care for people, and lead with courage. Sincerely, William F. Oplinger president and chief executive officer Alcoa 2023 ANNUAL REPORT | 3 2023 Highlights All data for year ending December 31, 2023 EMPLOYEES BAUXITE • Bauxite production: 41.0 million dry metric tons • Among the world’s largest bauxite miners BAUXITE SHIPMENTS 45.2 Million Dry Metric Tons ALUMINA SHIPMENTS 12.8 Million Metric Tons • Average realized alumina price: $358 per metric ton • 13% production decrease year-over-year due to curtailments and lower-grade bauxite from Western Australia • Average realized aluminum price: $2,828 per metric ton • 5% production increase year-over-year ALUMINUM SHIPMENTS 2.5 Million Metric Tons ALUMINA ALUMINUM ~13,600 employees across 17 countries REVENUE $10.55 billion CASH BALANCE $944 million PRODUCTION Aluminum: 2.1 Million Metric Tons Alumina: 10.9 Million Metric Tons Bauxite: 41.0 Million Dry Metric Tons 4 Safety In 2023, Alcoa Corp maintained its commitment to safety, achieving notable improvements in key metrics. We strive to maintain a culture of speaking up, where incidents are reported and ideas are shared. We integrate our temporary workers, contractors, and visitors into our safety programs. We ended the year with a 23 percent reduction in the lost time and/or restricted work (DART) injury rate, a 10 percent reduction in the total recordable injury rate (TRI) and a 2 percent reduction in the All Injury rate. This accomplishment underscores Alcoa’s dedication to fostering a culture of safety, prioritizing the well-being of our employees, and upholding the highest standards of operational excellence. We also saw year-over-year improvements related to Critical Control Field Verifications (CCFVs) for both the number and the participation rates. CCFVs involve scheduling inspections to verify that controls to prevent injuries are in place, where the work is occurring, and then documenting inspection results and implementing corrective actions when needed. POSITIVE SAFETY PERFORMANCE IN 2023 POSITIVE SAFETY PERFORMANCE IN 2023 CRITICAL CONTROL FIELD VERIFICATION (CCFV) CRITICAL CONTROL FIELD VERIFICATION (CCFV) DART TRI All Injury Number of Audits % Participation People Our business depends in large part on our ability to attract, develop, and retain a diverse population of talented, qualified, and highly skilled employees. Together, we are shaping our business, our communities and our world, incorporating industry-leading safety measures, and meeting market demands. Our teams know that safety, efficiency, quality, and continuous improvement are keys to success. Our goal is to provide trusting workplaces that are safe, respectful, and inclusive of all individuals and that reflect the diversity of the communities in which we operate. We aim to build a more inclusive culture where inclusion, diversity, and equity (IDE) is embedded in our actions and employees feel valued, empowered, and respected. Alcoa 2023 ANNUAL REPORT | 5 Products and Processes Through our products and processes, we are delivering what our customers need today while innovating for the future. We currently offer the industry’s only suite of low carbon products that encompass both alumina and aluminum via our Sustana™ brand, which includes EcoDura™ aluminum (recycled content), EcoLum™ aluminum (low carbon), and EcoSource™ alumina (also low carbon). We also have a goal of being the lowest emitter of carbon dioxide among all global aluminum companies, per ton of emissions in both smelting and refining. In 2023, we had 87 percent of our global smelting portfolio powered by renewable energy, exceeding our target of 85 percent. Our technology roadmap of research and development technologies, which are currently under development, is providing a potential pathway to revolutionize the aluminum industry. The ELYSIS™ partnership uses a technology that eliminates direct greenhouse gas emissions from the traditional smelting process, instead emitting oxygen as a byproduct. The research and development program is being ramped up to commercial scale. Commercial-grade aluminum produced by ELYSIS, at R&D scale quantities, has been sold for use by top-tier brands such as Apple Inc. and RONAL Group for Audi’s e-Tron GT. The ASTRAEA™ process is a proprietary technology under development to purify post-consumer aluminum scrap, regardless of alloy combination, and beneficiate it up to high purity levels that exceed what is produced at most primary aluminum smelters operating today, permitting use in high tolerance applications. The Refinery of the Future initiative is in its early research stages, and it aims to achieve alumina refining with no direct greenhouse gas emissions through adapting various processes and new technologies. 6 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) " ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ! TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______ to _______ Commission File Number 1-37816 ALCOA CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 201 Isabella Street, Suite 500, Pittsburgh, Pennsylvania (Address of principal executive offices) 81-1789115 (I.R.S. Employer Identification No.) 15212-5858 (Zip Code) (Registrant’s telephone number, including area code): 412-315-2900 Securities registered pursuant to Section 12(b) of the Act: Title of each class Common Stock, par value $0.01 per share Trading Symbol(s) AA Name of each exchange on which registered New York Stock Exchange Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ! No ! Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ! No ! Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ! No ! Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ! No ! Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer Non-accelerated filer Emerging growth company " ! ! Accelerated filer Smaller reporting company ! ! If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ! Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ! If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ! Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ! Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ! No ! The aggregate market value of the registrant’s voting stock held by non-affiliates at June 30, 2023 was approximately $6.0 billion, based on the closing price per share of Common Stock on June 30, 2023 of $33.93 as reported on the New York Stock Exchange. As of February 16, 2024, there were 179,558,990 shares of the registrant’s common stock, par value $0.01 per share, outstanding. DOCUMENTS INCORPORATED BY REFERENCE Part III of this Form 10-K incorporates by reference certain information from the registrant’s Definitive Proxy Statement for its 2024 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A. TABLE OF CONTENTS Page Part I Business ........................................................................................................................................................................... Item 1. 1 Item 1A. Risk Factors ..................................................................................................................................................................... 16 Item 1B. Unresolved Staff Comments ............................................................................................................................................ 30 Item 1C. Cybersecurity ................................................................................................................................................................... 31 Properties ......................................................................................................................................................................... 32 Item 2. Legal Proceedings............................................................................................................................................................ 44 Item 3. Mine Safety Disclosures .................................................................................................................................................. 45 Item 4. Part II Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities...... 46 Item 5. [RESERVED] .................................................................................................................................................................. 47 Item 6. Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.......................................... 48 Item 7A. Quantitative and Qualitative Disclosures About Market Risk......................................................................................... 71 Financial Statements and Supplementary Data................................................................................................................ 72 Item 8. Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure......................................... 134 Item 9A. Controls and Procedures .................................................................................................................................................. 134 Item 9B. Other Information ............................................................................................................................................................ 134 Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections............................................................................. 134 Part III Item 10. Directors, Executive Officers and Corporate Governance .............................................................................................. 134 Item 11. Executive Compensation ................................................................................................................................................. 135 Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ....................... 135 Item 12. Item 13. Certain Relationships and Related Transactions, and Director Independence ................................................................ 135 Principal Accountant Fees and Services .......................................................................................................................... 135 Item 14. Part IV Item 15. Item 16. Exhibit and Financial Statement Schedules..................................................................................................................... 136 Form 10-K Summary ....................................................................................................................................................... 139 Signatures......................................................................................................................................................................... 140 Note on Incorporation by Reference In this Form 10-K, selected items of information and data are incorporated by reference to portions of Alcoa Corporation’s Definitive Proxy Statement for its 2024 Annual Meeting of Stockholders (Proxy Statement), which will be filed with the Securities and Exchange Commission within 120 days after the end of Alcoa Corporation’s fiscal year ended December 31, 2023. Unless otherwise provided herein, any reference in this Form 10-K to disclosures in the Proxy Statement shall constitute incorporation by reference of only that specific disclosure into this Form 10-K. PART I (dollars in millions, except per-share amounts, average realized prices, and average cost amounts) Item 1. Business. The Company Alcoa Corporation, a Delaware corporation (the Company), is active in all aspects of the upstream aluminum industry with bauxite mining, alumina refining, and aluminum smelting and casting. The Company has direct and indirect ownership of 27 locations across nine countries on six continents. The Company’s operations in 2023 comprised two reportable business segments: Alumina and Aluminum. The Alumina segment primarily consists of a series of affiliated operating entities held in Alcoa World Alumina and Chemicals, a global, unincorporated joint venture between Alcoa and Alumina Limited (described below). The Aluminum segment consists of the Company’s aluminum smelting and casting operations along with most of the Company’s energy production assets. Aluminum, as an element, is abundant in the earth’s crust, but a multi-step process is required to manufacture finished aluminum metal. Aluminum metal is produced by refining alumina oxide from bauxite into alumina, which is then smelted into aluminum and can be cast into many shapes and forms. Alcoa smelts and casts aluminum in various shapes and sizes for global customers, including developing and creating various alloy combinations for specific applications. Aluminum metal is a commodity traded on the London Metal Exchange (LME) and priced daily. Additionally, alumina is subject to market pricing through the Alumina Price Index (API), which is calculated by the Company based on the weighted average of a prior month’s daily spot prices published by the following three indices: CRU Metallurgical Grade Alumina Price, Platts Metals Daily Alumina PAX Price, and FastMarkets Metal Bulletin Non-Ferrous Metals Alumina Index. As a result, the prices of both aluminum and alumina are subject to significant volatility and, therefore, influence the operating results of Alcoa. Alcoa Corporation became an independent, publicly traded company on November 1, 2016, following its separation (the Separation Transaction) from its former parent company, Alcoa Inc. References herein to “ParentCo” refer to Alcoa Inc. and its consolidated subsidiaries through October 31, 2016, at which time it was renamed Arconic Inc. (Arconic) and since has been subsequently renamed Howmet Aerospace Inc. Business Strategy Alcoa's business strategy is designed to create shareholder value while aligning with our purpose, vision, and values. In the near term, the Company has an acute focus on the strategic priority of reducing complexity and developing a portfolio of mining, refining, and smelting assets that is profitable, safe, stable, low cost, low carbon emitting, and supported by a strong balance sheet. To achieve this, Alcoa is prioritizing maintaining a lean overhead structure, operating with excellence, and actively managing our asset portfolio. In 2019, the Company announced a five-year strategic portfolio review of its smelting and refining capacity to improve cost positioning, or curtail, close, or divest 1.5 million and 4 million metric tons of smelting and refining capacity, respectively. Through January 2024, Alcoa continued to make progress on the portfolio review completing its review of refining capacity and reaching approximately 93 percent of its target for smelting capacity. This focus on operational stability and portfolio transformation results in a reduction in complexity and improved cash generation to support the Company’s capital allocation framework. At the same time, Alcoa maintains two additional strategic priorities for creating value into the long term: advance sustainably and drive returns. To advance sustainably, the Company seeks to increase value from a leading sustainability position, which includes the industry’s most comprehensive suite of products made with lower carbon emissions. The SustanaTM brand, includes EcoDuraTM aluminum (recycled content), EcoLumTM aluminum (low carbon), and EcoSourceTM alumina (also low carbon). These products create a differentiated position for Alcoa, serve growing markets focused on lowering carbon emissions, and provide competitive advantages that the Company can build on. Additionally, the Company has the goal of being the lowest emitter of carbon dioxide among all global aluminum companies, per ton of emissions in both smelting and refining, and aims to move its aluminum asset portfolio to a first quartile cost position relative to other aluminum producers upon completion of our portfolio review. In 2023, Alcoa exceeded its target of 85 percent of its smelting portfolio being powered by renewable energy, attaining 87 percent. Renewable energy is derived from natural processes that are replenished constantly, such as sunlight, wind, and hydropower. 1 The third strategic priority is drive returns. To do so, the Company is developing targeted growth opportunities that leverage its competitive advantages to meet the evolving demands of stakeholders and customers and create lasting sources of value. Through active research and development projects, Alcoa is seeking to innovate breakthrough technologies to revolutionize its impact and that of its customers. These have the potential to drive value by reducing costs, improving efficiency, and reducing greenhouse gas emissions in both alumina refining and aluminum smelting. The roadmap of technologies under development includes: • The ELYSISTM partnership uses an aluminum smelting technology that eliminates direct greenhouse gas emissions from the traditional smelting process, instead emitting pure oxygen as a byproduct. The research and development program is being ramped up to commercial scale and commercial-grade research and development scale quantities of aluminum produced by ELYSIS have been sold for use by top-tier brands including Apple Inc. and Audi AG. • The ASTRAEATM process is a proprietary technology under development that can purify post-consumer aluminum scrap, regardless of alloy combination, and beneficiate it up to high purity levels that exceed what is produced at most primary aluminum smelters operating today, permitting use in high tolerance applications, such as aerospace. • The Refinery of the Future initiative aims to achieve alumina refining with no direct greenhouse gas emissions through adapting various processes and new technologies under development for alumina refining. The various components of this initiative are in early research stages. To enable these strategic priorities, the Company strives to have a performance culture with an action orientation that delivers results, straightforward communication, empowered employees, and aligned goals. See Part II Item 7 of this Form 10-K in Management’s Discussion and Analysis of Financial Condition and Results of Operations under caption Business Update for more information. Joint Ventures Alcoa World Alumina and Chemicals (AWAC) AWAC is an unincorporated global joint venture between Alcoa Corporation and Alumina Limited, a company incorporated under the laws of the Commonwealth of Australia and listed on the Australian Securities Exchange. AWAC consists of a number of affiliated entities that own, operate, or have an interest in bauxite mines and alumina refineries, as well as an aluminum smelter, in seven countries. Alcoa Corporation owns 60% and Alumina Limited owns 40% of these entities, directly or indirectly, with such entities being consolidated by Alcoa Corporation for financial reporting purposes. The scope of AWAC generally includes the mining of bauxite and other aluminous ores; the refining, production, and sale of smelter grade and non-metallurgical alumina; and the production of certain primary aluminum products. Alcoa provides the operating management for AWAC, which is subject to direction provided by the Strategic Council of AWAC. The Strategic Council consists of five members, three of whom are appointed by Alcoa (of which one is the Chair) and two of whom are appointed by Alumina Limited (of which one is the Deputy Chair). Matters are decided by a majority vote with certain matters requiring approval by at least 80% of the members, including: changes to the scope of AWAC; changes in the dividend policy; equity calls in aggregate greater than $1,000 in any year; sales of all or a majority of the AWAC assets; loans from AWAC companies to Alcoa or Alumina Limited; certain acquisitions, divestitures, expansions, curtailments or closures; certain related-party transactions; financial derivatives, hedges or swap transactions; a decision by AWAC entities to file for insolvency; and changes to pricing formula in certain offtake agreements which may be entered into between AWAC entities and Alcoa or Alumina Limited. AWAC Operations AWAC entities’ assets include the following interests: • 100% of the bauxite mining, alumina refining, and aluminum smelting operations of Alcoa’s affiliate, Alcoa of Australia Limited (AofA); • 100% of the Juruti bauxite deposit and mine in Brazil; • 45% interest in Halco (Mining) Inc., a bauxite consortium that owns a 51% interest in Compagnie des Bauxites de Guinée (CBG), a bauxite mine in Guinea; • 39.96% interest in the São Luís refinery in Brazil; • 55% interest in the Portland, Australia smelter that AWAC manages on behalf of the joint venture partners; • 25.1% interest in the mine and refinery in Ras Al Khair, Saudi Arabia; • 100% of the refinery and alumina-based chemicals assets at San Ciprián, Spain; 2 • 100% of Alcoa Steamship Company LLC, a company that procures ocean freight and commercial shipping services for Alcoa in the ordinary course of business; • 100% of the refinery assets at the closed facility in Point Comfort, Texas, United States; and, • 100% interest in various assets formerly used for mining and refining in the Republic of Suriname (Suriname). Exclusivity Under the terms of their joint venture agreements, Alcoa and Alumina Limited have agreed that, subject to certain exceptions, AWAC is their exclusive vehicle for their investments, operations or participation in the bauxite and alumina business, and they will not compete with AWAC in those businesses. In the event of a change of control of either Alcoa or Alumina Limited, this exclusivity and non-compete restriction will terminate, and the partners will then have opportunities to unilaterally pursue bauxite or alumina projects outside of or within AWAC, subject to certain conditions provided in the Amended and Restated Charter of the Strategic Council. Equity Calls The cash flow of AWAC and borrowings are the preferred sources of funding for the needs of AWAC. An equity call can be made on 30 days’ notice, subject to certain limitations, in the event the aggregate annual capital budget of AWAC requires an equity contribution from Alcoa and Alumina Limited. Dividend Policy AWAC will generally be required to distribute at least 50% of the prior calendar quarter’s net income of each AWAC entity, and certain AWAC entities will also be required to pay a distribution every three months equal to the amount of available cash above specified thresholds and subject to the forecast cash needs of the AWAC entity. Leveraging Policy Debt of AWAC is subject to a limit of 30% of total capital (defined as the sum of debt (net of cash) plus any noncontrolling interest plus shareholder equity). The AWAC joint venture has raised a limited amount of debt to fund growth projects as permitted under Alcoa’s revolving credit line and in accordance with the joint venture partnership agreements. Saudi Arabia Joint Venture In December 2009, Alcoa entered into a joint venture with the Saudi Arabian Mining Company (Ma’aden), which was formed by the government of Saudi Arabia to develop its mineral resources and create a fully integrated aluminum complex in Saudi Arabia. Ma’aden is listed on the Saudi Stock Exchange (Tadawul). The joint venture complex includes a bauxite mine with estimated capacity of 5 million dry metric tons per year; an alumina refinery with a capacity of 1.8 million metric tons per year (mtpy); and an aluminum smelter with a capacity of 804,000 mtpy. The joint venture is currently comprised of two entities: the Ma’aden Bauxite and Alumina Company (MBAC) and the Ma’aden Aluminium Company (MAC). Ma’aden owns a 74.9% interest in the MBAC and MAC joint venture. Alcoa owns a 25.1% interest in MAC, which holds the smelter; AWAC holds a 25.1% interest in MBAC, which holds the mine and refinery. The refinery and smelter are located within the Ras Al Khair industrial zone on the east coast of Saudi Arabia. Pursuant to the joint venture agreement between Alcoa and Ma’aden, Alcoa is permitted to sell all of its shares in both MBAC and MAC collectively, for which Ma’aden has a right of first refusal. In addition, upon the occurrence of an unremedied event of default by Alcoa, Ma’aden may purchase, or, upon the occurrence of an unremedied event of default by Ma’aden, Alcoa may sell, its interest in the joint venture for consideration that varies depending on the time of the default. 3 ELYSIS ELYSIS Limited Partnership is between wholly-owned subsidiaries of Alcoa (48.235%) and Rio Tinto Alcan Inc. (Rio Tinto) (48.235%), respectively, and Investissement Québec (3.53%), a company wholly-owned by the Government of Québec, Canada. The purpose of ELYSIS is to advance larger scale development and commercialization of its patent-protected technology that eliminates direct greenhouse gas emissions from the traditional aluminum smelting process and, in the production of aluminum, instead emits oxygen. Alcoa first developed the inert anode technology for the aluminum smelting process that served as the basis for the formation of ELYSIS in 2018. Development scale quantities of aluminum produced by ELYSIS have been sold for commercial purposes, including to RONAL Group for the wheels for the Audi eTron GT. ELYSIS has also supplied metal to Apple Inc., a non-equity investor in the technology, for use in some of its products such as the 16-inch MacBook Pro and the iPhone SE. Others The Company is party to several other joint ventures and consortia. See additional details within each business segment discussion below. The Aluminerie de Bécancour Inc. (ABI) smelter is a joint venture between Alcoa and Rio Tinto located in Bécancour, Québec. Alcoa owns 74.95% of the joint venture through its 50% equity investment in Pechiney Reynolds Quebec, Inc., which owns a 50.1% share of the smelter, and two wholly-owned Canadian subsidiaries, which own 49.9% of the smelter. Rio Tinto owns the remaining 25.05% interest in the joint venture through its 50% ownership in Pechiney Reynolds Quebec, Inc. CBG is a joint venture between Boké Investment Company (51%) and the Government of Guinea (49%) for the operation of a bauxite mine in the Boké region of Guinea. Boké Investment Company is owned 100% by Halco (Mining) Inc.; AWA LLC holds a 45% interest in Halco. AWA LLC is part of the AWAC group of companies and is ultimately owned 60% by Alcoa and 40% by Alumina Limited. On April 30, 2022, Alcoa completed the sale of its investment in Mineração Rio Do Norte (MRN) for proceeds of $10. An additional $30 in cash could be paid to the Company in the future if certain post-closing conditions related to future MRN mine development are satisfied. Related to this transaction, the Company recorded an asset impairment of $58 in the first quarter of 2022 in Restructuring and other charges, net on the Statement of Consolidated Operations. In addition, the Company entered into several bauxite offtake agreements with South32 Minerals S.A. (South32). to provide bauxite supply for existing long-term supply contracts. Alumar is an unincorporated joint venture for the operation of a refinery, smelter, and casthouse in Brazil. The refinery is owned by AWAB (39.96%), Rio Tinto (10%), Alcoa Alumínio (14.04%), and South32 (36%). AWAB is part of the AWAC group of companies and is ultimately owned 60% by Alcoa and 40% by Alumina Limited. With respect to Rio Tinto and South32, the named company or an affiliate thereof holds the interest. The smelter and casthouse are owned by Alcoa Alumínio (60%) and South32 (40%). Strathcona calciner is a joint venture between affiliates of Alcoa and Rio Tinto. Calcined coke is used as a raw material in aluminum smelting. The calciner is owned by Alcoa (39%) and Rio Tinto (61%). Hydropower Machadinho Hydro Power Plant (HPP) is a consortium located on the Pelotas River in southern Brazil in which the Company has a 27.3% ownership interest through Alcoa Alumínio. The remaining ownership interests are held by unrelated third parties. Barra Grande HPP is a joint venture located on the Pelotas River in southern Brazil in which the Company has a 42.2% ownership interest through Alcoa Alumínio. The remaining ownership interests are held by unrelated third parties. Estreito HPP is a consortium between Alcoa Alumínio, through Estreito Energia S.A. (25.5%) and unrelated third parties located on the Tocantins River, northern Brazil. Serra do Facão HPP is a joint venture between Alcoa Alumínio (35%) and unrelated third parties located on the Sao Marcos River, central Brazil. Manicouagan Power Limited Partnership (Manicouagan) is a joint venture between affiliates of Alcoa and Hydro-Québec. Manicouagan owns and operates the 335 megawatt McCormick hydroelectric project, which is located on the Manicouagan River in the Province of Québec, Canada. Alcoa owns 40% of the joint venture. 4 Alumina This segment consists of the Company’s worldwide refining system, including the mining of bauxite, which is then refined into alumina, a compound of aluminum and oxygen that is the raw material used by smelters to produce aluminum metal. Bauxite is the principal raw material used to produce alumina and contains various aluminum hydroxide minerals, the most important of which are gibbsite and boehmite. Bauxite is refined into alumina using the Bayer process. The Company obtains bauxite from its own resources, including those belonging to AWAC, as well as through long-term and short-term contracts and mining leases. Tons of bauxite are reported on a zero-moisture basis in millions of dry metric tons (mdmt) unless otherwise stated. Alcoa’s alumina sales are made to customers globally and are typically priced by reference to published spot market prices. The Company produces smelter grade alumina and non-metallurgical grade alumina. The Company’s largest customer for smelter grade alumina is its own aluminum smelters, which in 2023 accounted for approximately 32 percent of its total alumina shipments. A small portion of the alumina (non-metallurgical grade) is sold to third-party customers who process it into industrial chemical products. This segment also includes AWAC’s 25.1% share of MBAC. In 2023, Alcoa-operated mines, mines operated by partnerships in which Alcoa, including AWAC, has equity interests, and bauxite offtake agreements supplied 83 percent of volume to Alcoa refineries and the remaining 17 percent was sold to third-party customers. Alcoa-operated mines produced 36.3 mdmt of bauxite and mines operated by partnerships produced 4.7 mdmt of bauxite on a proportional equity basis, for a total Company bauxite production of 41.0 mdmt. On April 30, 2022, Alcoa completed the sale of its investment in MRN. The Company entered into several bauxite offtake agreements with South32 to provide bauxite supply for existing long-term supply contracts. Based on the terms of its bauxite supply contracts, the amount of bauxite AWAC purchases from its minority-owned joint ventures, MRN (until its sale in April 2022) and CBG, differ from its proportional equity in those mines. Therefore, in 2023, Alcoa had access to 45.2 mdmt of production from its portfolio of bauxite interests and bauxite offtake and supply agreements and sold 7.6 mdmt of bauxite to third parties; 37.6 mdmt of bauxite was delivered to Alcoa refineries. The Company primarily sells alumina through contracts containing two pricing components: (1) the API price basis and (2) a negotiated adjustment basis that takes into account various factors, including freight, quality, customer location, and market conditions, as well as through fixed price spot sales. In 2023, approximately 95 percent of the Company’s smelter grade alumina shipments to third parties were sold on an adjusted API price or fixed price spot basis. Beginning in January 2023, financial information for the activities of the bauxite mines and the alumina refineries was combined into the Alumina segment and the Company began reporting its financial results in the following two segments: (i) Alumina and (ii) Aluminum. Accordingly, segment information for all prior periods presented was updated to reflect the new segment structure in Quarterly Report on Form 10-Q and Annual Report on Form 10-K filings. Information regarding the Company’s bauxite mining properties and bauxite mineral resources and reserves is included in Part 1 Item 2 of this Form 10-K. Alcoa’s alumina refining facilities and its worldwide alumina capacity stated in metric tons per year (mtpy) as of December 31, 2023 are shown in the following table: Nameplate Capacity1 (000 mtpy) Alcoa Corporation Consolidated Capacity1 (000 mtpy) 2,190 4,700 2,879 390 3,860 1,600 15,619 2,190 4,700 2,879 390 2,084 1,600 13,843 Country Australia (AofA) Brazil Spain TOTAL Facility Kwinana Pinjarra Wagerup Poços de Caldas São Luís (Alumar) San Ciprián 5 Equity Interests: Country Saudi Arabia Ras Al Khair (MBAC) Facility Nameplate Capacity1 (000 mtpy) Alcoa Corporation Consolidated Capacity1 (000 mtpy) 1,800 452 (1) Nameplate Capacity is an estimate based on design capacity and normal operating efficiencies and does not necessarily represent maximum possible production. Alcoa Corporation Consolidated Capacity represents our share of production from these facilities. For facilities wholly-owned by AWAC, Alcoa takes 100% of the production. As of December 31, 2023, Alcoa had approximately 1,452,000 mtpy of idle capacity relative to total Alcoa consolidated capacity of 13,843,000 mtpy. Idle capacity of 800,000 mtpy at the San Ciprián refinery is due to the partial curtailment of the refinery in 2022, 438,000 mtpy of idle capacity at the Kwinana refinery is due to the partial curtailment in 2023, and 214,000 mtpy of idle capacity at the Poços de Caldas facility is a result of the previous full curtailment of the Poços de Caldas smelter. In October 2019, the Company announced a five-year review of our production assets that includes a range of potential outcomes for these facilities to improve cost positioning, including curtailment, closure, or divestiture. The review includes 4 million metric tons of global refining capacity, of which 2,305,000 mtpy of capacity has been permanently closed since the announced review. In January 2024, the Company announced an additional curtailment of 2,190,000 mpty of capacity through the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. The refinery has been operating at approximately 80 percent of its nameplate capacity since January 2023, when the Company reduced production by decreasing process flows and taking offline one of five digesters in response to a domestic natural gas shortage in Western Australia due to production challenges experienced by key gas suppliers. While the supply of natural gas improved in April 2023, the Company kept the one digester offline due to the prolonged annual mine plan approvals process. In 2022, production at the San Ciprián refinery was reduced to approximately 50 percent of the 1.6 million metric tons of annual capacity to mitigate the financial impact of high natural gas costs. In December 2023, the Company initiated engagement with government stakeholders and workers’ representatives to discuss ongoing financial difficulties at the San Ciprián operations, identify all potential forms of relief, and work collaboratively on a long-term solution. Aluminum This segment currently consists of (i) the Company’s worldwide smelting and casthouse system and (ii) a portfolio of energy assets in Brazil, Canada, and the United States. The smelting operations produce molten primary aluminum, which is then formed by the casting operations into either common alloy ingot (e.g., t-bar, sow, standard ingot) or into value add ingot products (e.g., foundry, billet, rod, and slab). The energy assets supply power to external customers in Brazil and the United States, as well as internal customers in the Aluminum segment (Baie-Comeau (Canada) smelter and Warrick (Indiana) smelter) and, to a lesser extent, the Alumina segment (Brazilian refineries). This segment also includes Alcoa’s 25.1% share of MAC, the smelting joint venture company in Saudi Arabia. Smelting and Casting Operations Contracts for primary aluminum vary widely in duration, from multi-year supply contracts to spot purchases. Pricing for primary aluminum products is typically comprised of three components: (i) the published LME aluminum price for commodity grade P1020 aluminum, (ii) the published regional premium applicable to the delivery locale, and (iii) a negotiated product premium that accounts for factors such as shape and alloy. 6 Alcoa’s primary aluminum facilities and its global smelting capacity stated in metric tons per year (mtpy) as of December 31, 2023 are shown in the following table: Country Australia Brazil Canada Iceland Norway Spain United States TOTAL Equity Interests: Facility Portland Poços de Caldas2 São Luís (Alumar) Baie Comeau, Québec Bécancour, Québec Deschambault, Québec Fjarðaál Lista Mosjøen San Ciprián Massena West, NY Evansville, IN (Warrick) Country Saudi Arabia Ras Al Khair (MAC) Facility Nameplate Capacity1 (000 mtpy) Alcoa Corporation Consolidated Capacity1 (000 mtpy) 358 N/A 447 324 467 287 351 95 200 228 130 215 3,102 197 N/A 268 324 350 287 351 95 200 228 130 215 2,645 Nameplate Capacity1 (000 mtpy) Alcoa Corporation Consolidated Capacity1 (000 mtpy) 804 202 (1) Nameplate Capacity is an estimate based on design capacity and normal operating efficiencies and does not necessarily represent maximum possible production. Alcoa Corporation’s consolidated capacity is its share of Nameplate Capacity based on its ownership interest in the respective smelter. (2) The Poços de Caldas facility is a casthouse and does not include a smelter. The Company’s five-year review of our production assets first announced in October 2019 includes 1.5 million metric tons of smelting capacity. The portfolio review includes evaluations to improve cost positioning, including curtailments, closures, or divestitures. As of December 31, 2023, the Company had approximately 465,000 mtpy of idle smelting capacity relative to total Alcoa consolidated capacity of 2,645,000 mtpy. The idle capacity includes 228,000 mtpy of idle capacity at the San Ciprián smelter, 84,000 mtpy of idle capacity at the Alumar smelter, 80,000 mtpy of idle capacity at the Warrick smelter, 42,000 mtpy of idle capacity at the Portland smelter, and 31,000 mtpy of idle capacity at the Lista smelter. During the fourth quarter of 2023, Alcoa began the restart of 54,000 mtpy of capacity at its Warrick Operations site (Indiana) that was curtailed in July 2022 due to operational challenges related to labor shortages in the region. The Company also approved the permanent closure of 54,000 mtpy of previously curtailed capacity (which had not operated since 2016) to prepare the site for future capital investments for improved casting capabilities. During 2023, the Company continued the controlled pace for the restart of the Alumar smelter in São Luís, Brazil. The site was operating at approximately 69 percent of the site’s total annual capacity of 268,000 mtpy (Alcoa share) as of December 31, 2023. In the fourth quarter of 2023, Alcoa began the restart of 16,000 mtpy of previously curtailed capacity at the Portland smelter. The smelter had previously been operating at approximately 75 percent of the site’s total annual capacity of 197,000 mtpy (Alcoa share) since March 2023 due to instability and challenges related to the production of rodded anodes. The site was operating at approximately 79 percent of its capacity as of December 31, 2023. The Company announced the closure of the previously curtailed Intalco aluminum smelter (279,000 mtpy) after evaluating various options for the asset in March 2023. The facility has been fully curtailed since 2020. 7 The San Ciprián smelter was curtailed in January 2022, as a result of an agreement with the workers’ representatives in December 2021. In February 2023, under the terms of an amended viability agreement, Alcoa agreed to a phased restart of the smelter beginning in January 2024, to operate an initial complement of approximately 6 percent of total pots, to restart all pots by October 1, 2025 and to maintain 75 percent of the annual capacity of 228 kmt from October 1, 2025 until the end of 2026. In December 2023, the Company initiated engagement with government stakeholders and workers’ representatives to discuss ongoing financial difficulties at the San Ciprián operations, identify all potential forms of relief, and work collaboratively on a long-term solution. In January 2024, the Company began the restart process for the initial complement of pots in accordance with terms of the viability agreement while the discussions on future solutions progress. Energy Facilities and Sources In 2023, energy comprised approximately 25% of the Company’s total alumina refining production costs and electric power comprised approximately 23% of the Company’s primary aluminum production costs. Electricity markets are regional and are limited by physical and regulatory constraints, including the physical inability to transport electricity efficiently over long distances, the design of the electric grid, including interconnections, and the regulatory structure imposed by various federal and state entities. Electricity contracts may be short-term (real-time or day ahead) or years in duration, and contracts can be executed for immediate delivery or years in advance. Pricing may be fixed, indexed to an underlying fuel source or other index such as LME, cost-based, or based on regional market pricing. In 2023, Alcoa generated approximately 9% of the power used at its smelters worldwide and generally purchased the remainder under long-term arrangements. The following table sets forth the electricity generation capacity and 2023 generation of facilities in which Alcoa Corporation has an ownership interest. See also the Joint Ventures section above. Country Brazil Canada United States TOTAL Facility Barra Grande Estreito Machadinho Serra do Facão Manicouagan Warrick Alcoa Corporation Consolidated Capacity (MW) 150 155 126 60 133 657 1,281 2023 Generation (MWh) 1,315,097 1,360,074 1,057,770 525,600 1,161,190 3,640,522 9,060,253 The figures in this table are presented in megawatts (MW) and megawatt hours (MWh), respectively. Each facility listed above generates hydroelectric power except the Warrick facility, which generates substantially all of the power used by the Warrick smelting facility from the co-located Warrick power plant using coal reserves from the Alcoa-owned Liberty Mine and coal purchased from third parties at nearby coal reserves. Liberty Mine has a production capacity of approximately 0.8 million tons per year. During 2023, approximately 33% of the generation from the Warrick power plant was sold into the market under its current operating permits. Alcoa Power Generating Inc., a subsidiary of the Company, also owns certain Federal Energy Regulatory Commission (FERC)-regulated transmission assets in Indiana, Tennessee, New York, and Washington. The consolidated capacity of the Brazilian energy facilities shown above in MW is the assured energy, representing approximately 53% of hydropower plant nominal capacity. The Brazilian hydroelectric facilities produce energy which is transmitted across the national grid to Alcoa’s refineries in Brazil and the excess generation capacity is sold into the market. 8 Below is an overview of our external energy for our smelters and refineries. Region North America External Energy Source Electricity Québec, Canada Alcoa’s smelter located in Baie-Comeau, Quebec, purchases approximately 25 percent of its electricity needs from Manicouagan Power Limited Partnership. Otherwise, all electricity consumed by the three smelters in Québec is purchased under contracts with Hydro-Québec that expire on December 31, 2029. Massena, New York (Massena West) The Massena West smelter in New York receives power from the New York Power Authority (NYPA) pursuant to a contract between Alcoa and NYPA that expires in March 2026. Portland This smelter purchases power from the National Electricity Market (NEM) variable spot market in the state of Victoria. During 2021, the smelter entered into fixed-for-floating swap contracts with AGL Hydro Partnership, Origin Energy Electricity Limited, and Alinta Energy CEA Trading Pty Ltd, for a combined 515 MW. In addition, in November 2021 the Portland Aluminium joint venture announced the restart of 35,000 mtpy of idle capacity (19,000 mtpy Alcoa share), and the smelter entered into an additional fixed-for- floating swap contract with AGL Hydro Partnership for 72 MW. These swap contracts for a combined 587 MW expire on June 30, 2026. Australia In August 2023, the smelter entered into a nine-year fixed-for-floating swap contract with AGL Hydro Partnership for 300 MW effective July 1, 2026, when current contracts end. Each of these swap contracts manage exposure to the variable energy rates from the NEM spot market. Natural Gas Alcoa generally procures natural gas on a competitive bid basis from a variety of sources, including natural gas producers and independent gas marketers. Contract pricing for gas is typically based on a published industry index such as the New York Mercantile Exchange (NYMEX). Western Australia AofA uses gas to co-generate steam and electricity for its alumina refining processes at the Kwinana, Pinjarra and Wagerup refineries, and to fuel the calcination furnaces at each site. In 2015, AofA secured a significant portion of gas supplies to 2032. In 2020 and 2022, AofA contracted for additional gas supplies starting in 2024. On a combined basis, AofA’s gas supply arrangements are expected to cover approximately 80 percent of the refineries’ gas requirements through 2027, with decreasing percentages thereafter through 2032. On January 8, 2024, the Company announced the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. The Company is evaluating alternatives to resell, swap or redeploy the gas secured for the Kwinana refinery when fully curtailed. 9 External Energy Source Region Electricity San Ciprián, Spain The San Ciprián smelter was fully curtailed in January 2022 pursuant to the agreement reached with the workers’ representatives on December 29, 2021. The smelter purchased its reduced electricity requirements under a bilateral spot power contract that expired on June 30, 2022. Natural Gas Spain The San Ciprián refinery has been operating at 50 percent of its capacity since the third quarter of 2022. In January 2022, Naturgy terminated its contract supplying 50 percent of the refinery’s natural gas demand until June 2022 and 25 percent from July to December 2022. Subsequent to February 2022, the Company has access to adequate supply at spot gas rates. In February 2023, the Company reached an updated viability agreement with the workers’ representatives to commence the restart process in phases beginning in January 2024. In anticipation of the phased restart beginning in 2024, Alcoa entered into two long-term power purchase agreements (PPAs) with renewable energy providers in 2022 for up to 75 percent of the smelter’s future power needs. In 2023, relevant authorities denied some permits related to the development of windfarms included in the PPAs and the PPAs are now expected to supply up to 50 percent of the smelter’s future power needs at its full capacity. The supply of energy will continue to depend on the permitting and development of the remaining windfarms included in the PPAs. As the Company engages stakeholders for a long-term solution for San Ciprián operations, it also continues discussions with other generators to secure long-term power. Lista and Mosjøen, Norway Beginning in 2017, Alcoa entered into several long-term power purchase agreements, which secured approximately 50 percent of the necessary power for the Norwegian smelters for the period of 2020 to 2035. Europe In 2023, approximately 25 percent of the necessary power at the Mosjøen smelter was purchased at spot rates. Beginning in 2022, the Company acted to mitigate spot energy pricing at the Lista smelter which was partially curtailed in August 2022. In July 2022, the Company entered into a fixed price power agreement effective for the fourth quarter of 2022 through December 31, 2023. In February 2023, the agreement was amended with improved fixed pricing and lower volume commitments. During 2023, the Company amended an existing long-term power agreement to fix the price for 2024 for a portion of the smelter’s power requirements and entered into additional fixed price contracts for nearly all of the remaining power requirements for the smelter for 2024. Financial compensation of the indirect carbon emissions costs passed through in the electricity bill is received in accordance with EU Commission Guidelines and the Norwegian compensation regime. Iceland Landsvirkjun, the Icelandic national power company, supplies competitively priced electricity from a hydroelectric facility to Alcoa’s Fjarðaál smelter under a 40-year power contract, which will expire in 2047 with a price renegotiation effective from 2028. 10 Region Electricity Alumar The Alumar smelter was operating at 69 percent of the site’s total annual capacity of 268 kmt (Alcoa share) as of December 31, 2023, following the restart that was announced in September 2021. External Energy Source Natural Gas South America Alcoa entered into several short-term power purchase agreements which secured substantially all of the necessary power for its share of the Alumar smelter for the restart period in 2022 through the end of 2023. Alcoa also entered into multiple long-term power purchase agreements which collectively secured all of the necessary power for its share of the Alumar smelter for the period of 2024 through 2038. All short- and long-term power secured is from renewable sources. Sources and Availability of Raw Materials The Company believes that the raw materials necessary to its business are and will continue to be available and that the sources and availability of such raw materials are currently adequate. Generally, materials are purchased from third-party suppliers under competitively priced supply contracts or bidding arrangements. Substantially all of the raw materials required to manufacture our products are available from more than one supplier. Some sources of these raw materials are located in countries that may be subject to unstable political and economic conditions, which could disrupt supply or affect the price of these materials. Certain raw materials, such as caustic soda and calcined petroleum coke, may be subject to significant price volatility which could impact our financial results. Alcoa sources bauxite from its own resources, including AWAC entities, and believes its present sources of bauxite on a global basis are sufficient to meet the forecasted requirements of its alumina refining operations for the foreseeable future. Certain alumina refineries generate electricity through the digestor process that meets or exceeds their power needs, while others purchase electricity from third-party suppliers. For each metric ton (mt) of alumina produced, Alcoa consumes the following amounts of the identified raw material inputs (approximate range across relevant facilities): Raw Material Units Consumption per mt of Alumina Bauxite Caustic soda Electricity Fuel oil and natural gas Lime (CaO) mt kg kWh GJ kg 2.2 – 4.1 60 – 100 170 to 320 total consumed 6 – 13.8 6 – 60 For each metric ton of aluminum produced, Alcoa consumes the following amounts of the identified raw material inputs (approximate range across relevant facilities): Raw Material Units Consumption per mt of Primary Aluminum Alumina Aluminum fluoride Calcined petroleum coke Cathode blocks Electricity Liquid pitch Natural gas mt kg mt mt kWh mt mcf 1.91 – 1.94 11.2 – 20.9 0.32 – 0.39 0.004 – 0.009 13.27 – 16.78 0.08 – 0.10 2.0 – 5.6 Certain aluminum we produce includes alloying materials. Because of the number of different types of elements that can be used to produce various alloys, providing a range of such elements would not be meaningful. With the exception of a very small number of internally used products, Alcoa produces its aluminum alloys in adherence to an Aluminum Association (of which Alcoa is an active member) standard, which uses a specific designation system to identify alloy types. In general, each alloy type has a major alloying element other than aluminum but will also include lesser amounts of other constituents. 11 Competition Alcoa is subject to highly competitive conditions in all aspects of the aluminum supply chain in which it competes. With our business segments operating in close proximity to our broad, worldwide customer base, we endeavor to meet customer demand in key markets in North America, South America, Europe, the Middle East, Australia, and China. We compete with a variety of both U.S. and non-U.S. companies in all major markets across the aluminum supply chain. Competitors include bauxite miners who supply to the third-party bauxite market, alumina suppliers, refiners and producers, commodity traders, aluminum producers, and producers of alternative materials such as steel, titanium, copper, carbon fiber, composites, plastic, and glass. With the Sustana brand, including EcoDura aluminum (recycled content), EcoLum aluminum (low carbon), and EcoSource alumina (also low carbon), the Company is well positioned to compete with others in offering products to help customers achieve their decarbonization goals. Alumina We are the world’s largest alumina producer outside of China. The alumina market is global and highly competitive, with many active suppliers, producers, and commodity traders. The majority of our product is sold in the form of smelter grade alumina. Our main competitors in the third-party alumina market are Aluminum Corporation of China, South32, Hangzhou Jinjiang Group, Rio Tinto, and Norsk Hydro ASA. In recent years, there has been significant growth in alumina refining in China and Indonesia. Key factors influencing competition in the alumina market include cost position, price, reliability of bauxite supply, quality, and proximity to customers and end markets. We had an average cost position in the first quartile of global alumina production in 2023. Increased production costs in 2023 caused by lower bauxite grade in Australia, the San Ciprián refinery curtailment, and operational issues in Brazil could place Alumina in the second quartile in 2024. Our refineries are strategically located near low-cost bauxite mines, which provide a long-term supply of bauxite to our refineries. Our alumina refineries include sophisticated refining technology to maximize efficiency with the bauxite grades from these internal mines. We are among the world’s largest bauxite miners. The majority of bauxite mined globally is converted to alumina for the production of aluminum. In 2023, Alcoa-operated mines, mines operated by partnerships, and bauxite offtake agreements supplied approximately 83% of volume to Alcoa refineries and approximately 17% of Alcoa’s bauxite shipments were sold to third-party customers. Our principal competitors in the third-party bauxite market include Rio Tinto and multiple suppliers from Guinea, Australia, and Brazil, among other countries. We compete largely based on bauxite quality, price, and logistics, as well as strategically located long- term bauxite resources in Brazil and Guinea, which is home to the world’s largest reserves of high-quality metallurgical grade bauxite. Aluminum In our Aluminum segment, competition is dependent upon the type of product we are selling. The market for primary aluminum is global, and demand for aluminum varies widely from region to region. We compete with commodity traders, such as Glencore, Trafigura, J. Aron and Gerald Group, and aluminum producers, such as Emirates Global Aluminum, Norsk Hydro ASA, Rio Tinto, Century Aluminum and Vedanta Aluminum Ltd. Several of the most critical competitive factors in our industry are product quality, production costs (including source, reliability of supply, and cost of energy), price, access and proximity to raw materials, customers and end markets, timeliness of delivery, customer service (including technical support), product innovation, and breadth of offerings. Where aluminum products compete with other materials, the characteristics of aluminum are also a significant factor, particularly its light weight, strength, and recyclability. The strength of our position in the primary aluminum market is largely attributable to: our integrated supply chain; long-term energy arrangements; the ability of our casthouses to provide customers with a diverse product portfolio in terms of shapes and alloys; and our decreasing demand for fossil fuels, as approximately 87% of the aluminum smelting portfolio operated by the Company was powered by renewable (primarily hydropower) energy sources in 2023. The Company intends to continue to focus on optimizing capacity utilization. 12 Patents, Trade Secrets and Trademarks The Company believes that its domestic and international patent, trade secret and trademark assets provide it with a competitive advantage. The Company’s rights under its intellectual property, as well as the technology and products made and sold under them, are important to the Company as a whole and, to varying degrees, important to each business segment. Alcoa’s business as a whole is not, however, materially dependent on any single patent, trade secret or trademark. As a result of product development and technological advancement, the Company continues to pursue patent protection in jurisdictions throughout the world. As of December 31, 2023, Alcoa’s worldwide patent portfolio consisted of approximately 420 granted patents and approximately 170 pending patent applications. The Company also has a number of domestic and international registered trademarks that have significant recognition within the markets that are served, including the name “Alcoa” and the Alcoa symbol. Patents may exist for 20 years from filing date, and trademarks may have an indefinite life based upon continued use. Government Regulations and Environmental Matters Alcoa’s global operations subject it to compliance with various types of government laws, regulations, permits, and other requirements which often provide discretion to government authorities and could be interpreted, applied, or modified in ways to make the Company’s operations or compliance activities more costly. These laws and regulations include those relating to safety and health, environmental protection and compliance, tailings management, data privacy and security, anti-corruption, human rights, competition, and trade, such as tariffs or other import or export restrictions that may increase the cost of raw material or cross-border shipments and impact our ability to do business with certain countries or individuals. Though we cannot predict the collective potential adverse impact of the expanding body of laws, regulations, and interpretations, we believe that we are in compliance with such laws and regulations in all material respects and do not expect that continued compliance with such regulations will have a material effect upon capital expenditures, earnings, or our competitive position. For a discussion of the risks associated with certain applicable laws and regulations, see Part I Item 1A of this Form 10-K. Environmental Alcoa is subject to extensive federal, state/provincial, and local environmental laws and regulations and other requirements, in the U.S. and abroad, including those relating to the release or discharge of materials into the air, water and soil, waste management, pollution prevention measures, the generation, storage, handling, use, transportation and disposal of hazardous materials, and the exposure of persons to hazardous materials. Alcoa is committed to the Global Industry Standard on Tailings Management (GISTM), an integrated approach to the management and operations of our tailings storage facilities to enhance the safety of these facilities. In August 2023, Alcoa’s impoundments with very high or extreme consequence classification were audited by an independent third party and assessed as in conformance with GISTM as required by the International Council on Mining and Metals Conformance Protocol. This represents the first phase of implementation with lower consequence impoundment conformance required by August 2025. Additionally, we are and may become subject to various laws and regulations related to the disclosures of emissions, the impact of climate change to our business, and plans to reduce such emissions. Recent laws and regulations pertaining to climate change and greenhouse gas emissions have been implemented or are being considered. We continue to monitor the development and implementation of such laws and regulations and continue to assess the extent of potential disclosures or other reporting requirements. We maintain remediation and reclamation plans for various sites, and we manage environmental assessments and cleanups at approximately 60 locations, which include currently owned or operated facilities and adjoining properties, previously owned or operated facilities and adjoining properties, and waste sites, such as U.S. Superfund (Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)) sites. In 2023, capital expenditures for new or expanded facilities for environmental control were approximately $126 and approximately $180 is expected in 2024. See Part II Item 8 of this Form 10-K in Note S to the Consolidated Financial Statements under caption Contingencies for additional information. Safety and Health We are subject to a broad range of foreign, federal, state, and local laws and regulations relating to occupational health and safety, and our safety program includes measures required for compliance. We have incurred, and will continue to incur, capital expenditures to meet our health and safety compliance requirements, as well as to continually improve our safety systems. For a discussion of the risks associated with certain applicable laws and regulations, see Part I Item 1A of this Form 10-K. 13 Human Capital Resources Our core values – Act with Integrity, Operate with Excellence, Care for People, and Lead with Courage – guide us as a company, including our approach to human capital management. We believe that our people are our greatest asset. The success and growth of our business depend in large part on our ability to attract, develop, and retain a diverse population of talented, qualified, and highly skilled employees at all levels of our organization, including the individuals who comprise our global workforce, our executive officers and other key personnel. Our Company policies, including the Code of Conduct and Ethics, Harassment and Bullying Free Workplace Policy, and EHS Vision, Values, Mission, and Policy, support our mission to advance our Company culture and core values. Alcoa maintains a Human Rights Policy that applies globally to the Company, its partnerships, and other business associates, which incorporates international human rights principles encompassed in the Universal Declaration of Human Rights, the International Labor Organization’s Declaration on Fundamental Principles and Rights at Work, the United Nations Global Compact, and the United Nations Guiding Principles on Business and Human Rights. Employees As of December 31, 2023, Alcoa had approximately 13,600 employees in 17 countries. Approximately 10,000 of our global employees are covered by collective bargaining agreements with certain unions and varying expiration dates, including approximately 1,000 employees in the U.S., 2,000 employees in Europe, 1,400 employees in Canada, 2,800 employees in South America, and 2,800 employees in Australia. Approximately 900 U.S. employees are covered by a collective bargaining agreement in place with the United Steelworkers (USW). There are also U.S. collective bargaining agreements in place, with varying expiration dates, with the International Association of Machinists and Aerospace Workers (IAM) and the International Brotherhood of Electric Workers (IBEW). Safety and Health The safety and health of our employees, contractors, temporary workers, and visitors are top priorities and key to our ability to attract and retain talent. We aspire to work safely, all the time, everywhere. We strive to foster a culture of hazard and risk awareness, the effective understanding and use of our safe systems of work, proactive incident reporting, and knowledge sharing. Our safety programs and systems are designed to prevent loss of life and serious injury at our locations and include rigorous safety standards and controls, periodic risk-based audits, a formal and standardized process for investigating fatal and serious injury incidents (including potential incidents), management of critical risks and safety hazards, and efforts to eliminate hazards or implement controls to prevent and mitigate risks. We have operating standards based on human performance, which teach employees how to anticipate and recognize situations where errors are likely to occur, which help enable us to predict, reduce, manage, and prevent fatalities and injuries. We strive to maintain a culture of speaking up, where incidents are reported and ideas are shared. We integrate our temporary workers, contractors, and visitors into our safety programs and data. Inclusion, Diversity, and Equity Alcoa's vision is to provide trusting workplaces that are safe, respectful, and inclusive and that reflect the communities in which we operate. Our aim is to build a more inclusive culture where inclusion, diversity, and equity (IDE) is embedded in our actions and employees feel valued, empowered, and respected. As of December 31, 2023, women comprised approximately 19 percent of our global workforce. We also recognize the benefits and importance of diversity among our senior management. Of the seven Executive Officers, 43 percent are women and 14 percent are racially/ethnically diverse. In 2023, we continued our IDE strategic efforts with leadership from our new Global Head of IDE and four inclusion groups: AWARE – Alcoans working actively for racial-ethnic equality; EAGLE, our LGBT+ Equality inclusion group; AWN – Alcoa Women’s Network; and ABLE - Alcoans moving beyond limited expectations. 14 Available Information The Company’s internet website address is www.alcoa.com. Alcoa makes available free of charge on or through its website its Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports as soon as reasonably practicable after the Company electronically files such material with, or furnishes it to, the Securities and Exchange Commission (the SEC). These documents can be accessed on the investor relations portion of our website www.alcoa.com/investors. This information can also be found on the SEC’s internet website, www.sec.gov. The information on the Company’s website is included as an inactive textual reference only and is not a part of, or incorporated by reference in, this Annual Report on Form 10-K. Dissemination of Company Information Alcoa Corporation intends to make future announcements regarding Company developments and financial performance through its website, www.alcoa.com, as well as through press releases, filings with the SEC, conference calls, and webcasts. Information about our Executive Officers The names, ages, positions, and areas of responsibility of the executive officers of the Company as of the filing date of this Form 10-K are listed below. William F. Oplinger, 57, has served as President and Chief Executive Officer of Alcoa Corporation since September 24, 2023. Mr. Oplinger served as Executive Vice President and Chief Operations Officer of the Company from February 2023 until his appointment as President and Chief Executive Officer. From November 2016 through January 2023, Mr. Oplinger was Executive Vice President and Chief Financial Officer of the Company. Prior to this, Mr. Oplinger served as Executive Vice President and Chief Financial Officer of ParentCo from April 1, 2013 to November 2016. Mr. Oplinger joined ParentCo in 2000, and through 2013 held key corporate positions in financial analysis and planning and also served as Director of Investor Relations. Mr. Oplinger also held principal positions in the ParentCo’s Global Primary Products division, including as Controller, Operational Excellence Director, Chief Financial Officer, and Chief Operating Officer. Molly S. Beerman, 60, has served as Executive Vice President and Chief Financial Officer of Alcoa Corporation since February 1, 2023. Prior to this, Ms. Beerman was Senior Vice President and Controller of the Company from November 2019 through January 2023 and Vice President and Controller from December 2016 through October 2019. Ms. Beerman was Director, Global Shared Services Strategy and Solutions from November to December 2016. In 2016, Ms. Beerman held a consulting role with the Finance Department of ParentCo. From 2012 to 2015, Ms. Beerman served as Vice President, Finance and Administration for a non-profit organization focused on community issues. Prior to that, Ms. Beerman was employed by ParentCo from 2001 to 2012, having held several roles in the finance function and eventually becoming the director of global procurement center of excellence from 2008 to 2012. Ms. Beerman is a certified public accountant. Renato Bacchi, 47, has served as Executive Vice President and Chief Commercial Officer of Alcoa Corporation since August 1, 2023. He leads the Company’s sales and trading, marketing, supply chain, commercial operations, procurement, and transformation and oversees the Company’s global energy assets and innovation and technology programs. Mr. Bacchi was Executive Vice President and Chief Strategy and Innovation Officer of Alcoa Corporation from February 2023 to August 2023. Previously, he was Executive Vice President and Chief Strategy Officer from February 2022 through January 2023, Senior Vice President and Treasurer from November 2019 through January 2022, and Vice President and Treasurer from November 2016 through October 2019. Prior to the Separation Transaction, Mr. Bacchi served as the Assistant Treasurer of ParentCo from October 2014 through October 2016 and the Director, Corporate Treasury from 2012 to 2014. Prior to this time, Mr. Bacchi held various roles of increasing responsibility in areas including finance, strategy, procurement, energy and sales. Mr. Bacchi joined ParentCo in Brazil in 1997. Nicol A. Gagstetter, 45, has served as Executive Vice President and Chief External Affairs Officer of Alcoa Corporation since October 1, 2023. Ms. Gagstetter is responsible for global external affairs, communications, and sustainability, and she oversees the Alcoa Foundation. Ms. Gagstetter was the Global Head of Environment and Social, Copper Industrial Assets at Glencore International AG, a commodity trading and mining company, from August 2021 through September 2023. Previously, she held a variety of progressive leadership roles and positions across external affairs, sustainability, and marketing in Rio Tinto’s Commercial, Minerals, and Copper groups from 2008 to 2021. Andrew J. A. Hastings, 49, has served as Executive Vice President and General Counsel of Alcoa Corporation since September 1, 2023. Mr. Hastings has overall responsibility for the Company’s global legal, compliance, governance, and security matters. Prior to joining the Company, Mr. Hastings was Senior Vice President and General Counsel at Lundin Mining Corporation, a mine owner and operator, from February 2019 through August 2023. Previously, Mr. Hastings held progressive legal and commercial roles at Barrick Gold Corporation, a mining company, most recently as Vice President, Joint Venture Governance from May 2018 to February 2019. 15 Tammi A. Jones, 44, has served as Executive Vice President and Chief Human Resources Officer of Alcoa Corporation since April 1, 2020. Ms. Jones oversees all aspects of human resources management, including talent and recruitment, compensation and benefits, diversity, inclusion, and equity, training and development, and labor relations. Ms. Jones served as Vice President, Compensation and Benefits of Alcoa Corporation from January 2019 through March 2020 and was the Director, Organizational Effectiveness from April 2017 to December 2018. From April 2015 through March 2017, Ms. Jones served as Human Resources Director, Aluminum (at ParentCo until the Separation Transaction), and she served as Human Resources Director for ParentCo Wheels and Transportation Products from April 2013 to April 2015. Ms. Jones joined ParentCo in 2006 and held a variety of human resource positions at ParentCo, including Human Resources Director, Europe Building & Construction and Human Resources Director, UK and Ireland in ParentCo’s Building and Construction Systems division. Matthew T. Reed, 51, has served as Executive Vice President and Chief Operations Officer of Alcoa Corporation since January 1, 2024. Mr. Reed is responsible for the daily operations of the Company’s global bauxite, alumina, and aluminum assets. Mr. Reed was previously Vice President Operations, Australia and President, Alcoa of Australia from June 2023, when he joined the Company, through December 2023. Prior to joining Alcoa, Mr. Reed was the Operations Executive (Chief Operations Officer) of OZ Minerals Limited, a mining company based in South Australia, from September 2021 through May 2023. He was General Manager, Projects at OZ Minerals Limited from January 2021 through August 2021. Previously, Mr. Reed was the Executive Managing Director (Chief Operating Officer) at SIMEC Mining, a mining company based in South Australia, from September 2017 through December 2020. Item 1A. Risk Factors. There are inherent risks associated with Alcoa’s business and industry. In addition to the factors discussed elsewhere in this report, the following risks and uncertainties could have a material adverse effect on our business, financial condition, or results of operations, including causing Alcoa’s actual results to differ materially from those projected in any forward-looking statements. Although the risks are organized by heading, and each risk is described separately, many of the risks are interrelated. You should not interpret the disclosure of any risk factor to imply that the risk has not already materialized. While we believe we have identified and discussed below the key risk factors affecting our business, there may be additional risks and uncertainties that are not presently known to Alcoa or that Alcoa currently deems immaterial that also may materially adversely affect us in future periods. See Part II Item 7 of this Form 10-K in Management’s Discussion and Analysis of Financial Condition and Results of Operations under the caption Forward-Looking Statements. Industry and Global Market Risks The aluminum industry and aluminum end-use markets are highly cyclical and are influenced by several factors, including global economic conditions, the Chinese market, and overall consumer confidence. The nature of the industries in which our customers operate causes demand for our products to be cyclical, creating potential uncertainty regarding future profitability. The demand for aluminum is sensitive to, and impacted by, demand for the finished goods manufactured by our customers in industries, such as the commercial construction, transportation, and automotive industries, which may change as a result of factors beyond our control. The demand for aluminum is also highly correlated to economic growth, and we could be adversely affected by large or sudden shifts in the global inventory of aluminum and the resulting market price impacts. We believe the long-term prospects for aluminum and aluminum products are positive; however, we are unable to predict the future course of industry variables or the strength of the global economy and the effects of government intervention. Our business, financial condition, and results of operations may be materially affected by the conditions in the global economy generally, including inflationary and recessionary conditions, and in global capital markets, including in the end markets and geographic regions in which we and our customers operate. Many of the markets in which our customers participate are also cyclical in nature and experience significant fluctuations in demand for their products based on economic and geopolitical conditions, consumer demand, raw material and energy costs, foreign exchange rates, and government actions. Many of these factors are beyond our control. The Chinese market is a significant source of global demand for, and supply of, commodities, including aluminum. Chinese production rates of aluminum, both from new construction and installed smelting capacity, can fluctuate based on Chinese government policy, such as the level of enforcement of production capacity limits and/or licenses and environmental policies. In addition, industry overcapacity, a sustained slowdown in Chinese aluminum demand, or a significant slowdown in other markets, that is not offset by decreases in supply of aluminum or increased aluminum demand in emerging economies, such as India, Brazil, and several Southeast Asian countries, could have an adverse effect on the global supply and demand for aluminum and aluminum prices. Also, changes in the aluminum market can cause changes in the alumina and bauxite markets, which could also materially affect our business, financial condition, or results of operations. As a result of these factors, our profitability is subject to significant fluctuation. 16 A decline in consumer and business confidence and spending, severe reductions in the availability and cost of credit, and volatility in the capital and credit markets could adversely affect the business and economic environment in which we operate and the profitability of our business. We are also exposed to risks associated with the creditworthiness of our suppliers and customers. If the availability of credit to fund or support the continuation and expansion of our customers’ business operations is curtailed or if the cost of that credit is increased, the resulting inability of our customers or of their customers to either access credit or absorb the increased cost of that credit could adversely affect our business by reducing our sales or by increasing our exposure to losses from uncollectible customer accounts. These conditions and a disruption of the credit markets could also result in financial instability of some of our suppliers and customers. The consequences of such adverse effects could include the interruption of production at the facilities of our customers, the reduction, delay or cancellation of customer orders, delays or interruptions of the supply of raw materials we purchase, and bankruptcy of customers, suppliers, or other creditors. Any of these events could adversely affect our business, financial condition, and results of operations. We have in the past and could in the future be materially adversely affected by volatility and declines in aluminum and alumina demand and prices, including global, regional, and product-specific prices, or by significant changes in production costs which are linked to LME or other commodities. The overall price of primary aluminum consists of several components: (i) the underlying base metal component, which is typically based on quoted prices from the LME; (ii) the regional premium, which comprises the incremental price over the base LME component that is associated with the physical delivery of metal to a particular region (e.g., the Midwest premium for metal sold in the United States); and (iii) the product premium, which represents the incremental price for receiving physical metal in a particular shape (e.g., foundry, billet, slab, rod, etc.) and/or alloy. Each of the above three components has its own drivers of variability. The LME price volatility is typically driven by macroeconomic factors (including geopolitical instability), global supply and demand of aluminum (including expectations for growth, contraction, and the level of global inventories), and trading activity of financial investors. In 2023, LME cash prices reached a high of $2,636 per metric ton in January 2023 and a low of $2,069 per metric ton in August 2023. While global inventories remained consistent in 2023, high inventories could lead to a reduction in the price of aluminum and declines in the LME price have had a negative impact on our business, financial condition, and results of operations. Similarly, it is possible that persistently high inventories of Russian origin aluminum stocks in LME warehouses could have a negative impact on LME pricing. Regional premiums tend to vary based on the supply of and demand for metal in a particular region, associated transportation costs, and import tariffs. Product premiums generally are a function of supply and demand for a given primary aluminum shape and alloy combination in a particular region. Periods of industry overcapacity may also result in a weak aluminum pricing environment. A sustained weak LME aluminum pricing environment, deterioration in LME aluminum prices, or a decrease in regional premiums or product premiums could have a material adverse effect on our business, financial condition, or results of operations. Similarly, our operating results are affected by significant changes in key costs of production that are commodity or LME-linked. Most of our alumina contracts contain two pricing components: (1) the API price basis and (2) a negotiated adjustment basis that takes into account various factors, including freight, quality, customer location, and market conditions. Because the API component can exhibit significant volatility due to market exposure, revenues associated with our alumina operations are exposed to market pricing. Market-driven balancing of global aluminum supply and demand may be disrupted by non-market forces. In response to market-driven factors relating to the global supply and demand of aluminum and alumina, including energy prices and environmental policies, other industry producers have independently undertaken to reduce or increase production. Changes in production may be delayed or impaired by the ability to secure, or the terms of long-term contracts, to buy energy or raw materials. The impact of non-market forces on global aluminum industry capacity, such as political instability or pressures or governmental policies in certain countries relating to employment, the environment, or maintaining or further developing industry self-sufficiency, may affect overall supply and demand in the aluminum industry. For example, the ongoing active conflict between Russia and Ukraine could adversely impact macroeconomic conditions and result in heightened economic sanctions from the U.S. and the international community in a manner that adversely affects our industry. The disruption of the market-driven balancing of the global supply and demand of aluminum, a resulting weak pricing environment and margin compression may adversely affect our business, financial condition, and results of operations. 17 Our participation in increasingly competitive and complex global markets exposes us to risks, including legal and regulatory risks and changes in conditions beyond our control, that could adversely affect our business, financial condition, or results of operations. We have operations or activities in numerous countries and regions outside the United States, including Australia, Brazil, Canada, Europe, Guinea, and Saudi Arabia. The risks associated with the Company’s global operations include: • Geopolitical risks, such as political instability, coups d’états, civil unrest, strikes and work stoppages, expropriation, nationalization of properties by a government, imposition of sanctions, changes to import or export regulations and fees, renegotiation, revocation or nullification of existing agreements, leases, licenses, and permits, and changes to mining royalty rules or laws; • Economic and commercial instability risks, including those caused by sovereign and private debt default, corruption, and changes in local government laws, regulations, and policies, such as those related to tariffs and trade barriers, trade tensions, taxation, exchange controls, employment regulations, and repatriation of earnings; • Weakening macroeconomic conditions; • Decreasing manufacturing activity, especially in the global automotive sector; • War or terrorist activities; • Major public health issues, such as a pandemic or epidemic, which could cause disruptions in our operations, supply chain, or workforce; • Information systems failures or disruptions, including due to cyber attacks; • Difficulties enforcing intellectual property and contractual rights, or limitations in the protection of technology, data, and intellectual property, in certain jurisdictions; and, • Unexpected events, accidents, or environmental incidents, including natural disasters. We have experienced some of these events, and while the impact of any of the foregoing factors is difficult to predict, any one or more of them could adversely affect our business, financial condition, or results of operations. Existing insurance arrangements may not provide sufficient coverage or reimbursement for significant costs that may arise from such events. Unexpected or uncontrollable events or circumstances in any of the foreign markets in which we operate, including actions by foreign governments such as changes in foreign policy or fiscal regimes, termination of our leases or agreements with such foreign governments, increased government regulation, or forced curtailment or continuation of operations, could materially and adversely affect our business, financial condition, or results of operations. We have in the past been and may in the future be unable to obtain, maintain, or renew permits or approvals necessary for our mining operations, which could materially adversely affect our operations and profitability. Our mining operations are subject to extensive permitting and approval requirements. These include permits and approvals issued by various government agencies and regulatory bodies at the federal, state, and local levels of governments in the countries in which we operate. The permitting and approval rules are complex, are often subject to interpretations by regulators, which may change over time, and may be impacted by heightened levels of regulatory oversight and stakeholder focus on addressing environmental and social impacts of mining activities. Changing expectations and increased information required by regulators has in the past and could in the future make our ability to comply with the applicable requirements more difficult, inhibit or delay our ability to timely obtain the necessary approvals, if at all, result in approvals being conditioned in a manner that may restrict the Company’s ability to efficiently and economically conduct its mining activities, require us to adjust our mining plans, or preclude the continuation of certain ongoing operations and mining activities or the development of future mining operations. Failure to obtain, maintain, or renew permits or approvals, or permitting or approval delays, restrictions, or conditions has in the past and may in the future impact the quality of the bauxite we are able to mine and could increase our costs and affect our ability to efficiently and economically conduct our operations, potentially having a materially adverse impact on our results of operations and profitability. In addition, the permitting processes, restrictions, and requirements imposed by conditional permits or approvals, and associated costs and liabilities, have in the past and may in the future be extensive, which can delay or prevent commencing or continuing exploration or production operations. This has in the past adversely affected and could in the future adversely affect the Company’s mining operations and production, as well as our refining and smelting operations, and has in the past and could in the future require us to curtail, close, or otherwise modify our production, operations, and sites. In addition, these processes, restrictions, and requirements have in the past resulted and could in the future result in the Company’s mining permits being rescinded or modified, or adjustment to our mining plans, to mitigate against adverse impacts to sites within or near our mining areas that have environmental, biodiversity, or cultural significance. Such actions have in the past had and could in the future have a material adverse impact on our results of operations and profitability. For example, the Company seeks annual approvals from the Western Australia government for rolling five-year mine plans to maintain operations at the Huntly and Willowdale bauxite mines. This statutory annual mine approvals process 18 for the Company’s 2023-2027 Mining and Management Program (MMP) took longer than it had taken historically due to increased requirements and expectations from stakeholders with respect to certain environmental matters. As a result of the prolonged approval process, the Company began mining lower grade bauxite in April 2023, which impacted the Company’s refineries by increasing the use of caustic, energy, and bauxite and decreasing alumina output. The Company’s 2023-2027 MMP was approved in December 2023, and in connection with such approval, the Company is subject to certain new requirements to address key environmental factors, such as enhanced protections for drinking water, increased distances from reservoirs, biodiversity, and accelerated forest rehabilitation. The new requirements will require an acceleration of cash spend of approximately $40 over the next three and half years from asset retirement obligations already recorded. Our operations and profitability have in the past and could in the future be impacted by rising energy costs and interruptions or uncertainty in energy supplies. Our refineries and smelters consume substantial amounts of natural gas and electricity in the production of alumina and aluminum. The prices for and availability of energy have in the past and could in the future be impacted by volatile market conditions resulting from factors beyond our control such as weather, political, regulatory, and economic conditions. For example, in 2023, the Company announced its engagement with the regional and national governments in Spain to discuss sustained and ongoing losses at the San Ciprián refinery and smelter operations, partly driven by the long-term cost of energy and delays in permitting and development of cost competitive and renewable energy supplies. Though we have ownership in certain hydroelectricity assets, we also rely on third parties for our supply of energy resources consumed in the manufacture of our products. Energy supply contracts for our operations vary in length and market exposure, and we could be, and have been, negatively impacted by: • Significant increases in LME prices, or spot electricity, fuel oil and/or natural gas prices; • Unavailability of or interruptions or uncertainty in energy supply or unplanned outages due to political instability, droughts, hurricanes, wildfires, other natural disasters, equipment failure, or other causes; • Unavailability of long-term energy from renewable sources in particular locations or at competitive rates; • Curtailment of one or more refineries or smelters due to the inability to extend energy contracts upon expiration or negotiate new arrangements on cost-effective terms, the unavailability of energy at competitive rates; and, • Curtailment of one or more facilities due to high energy costs that render their continued operation uneconomic, discontinuation of power supply interruptibility rights granted to us under a regulatory regime in the country in which the facility is located, or due to a determination that energy arrangements do not comply with applicable laws, thus rendering the operations that had been relying on such country’s energy framework uneconomic. Events, such as those listed above, have in the past and could in the future result in high energy costs, the disruption of an energy source, finding a replacement energy source at a higher cost, the requirement to repay all or a portion of the benefit we received under a power supply interruptibility regime, or the requirement to remedy any non-compliance of an energy framework to comply with applicable laws. These events have disrupted our operations and resulted in production curtailments that could have a material adverse effect on our business, financial condition or results of operations. Our operations and profitability have been and could continue to be adversely affected by unfavorable changes in the cost, quality, or availability of raw materials or other key inputs, or by disruptions in the supply chain. Our business, financial condition, and results of operations have been and could continue to be negatively affected by unfavorable changes in the cost, quality, or availability of energy, raw materials, including carbon products, caustic soda, and other key inputs, such as bauxite, as well as freight costs associated with transportation of raw materials and key inputs to refining and smelting locations. We may not be able to fully offset the effects of higher raw material or energy costs through price increases, productivity improvements, cost reduction programs, or reductions or curtailments to production at our operations. A decrease in the quality of raw materials or key inputs has in the past and could continue to cause increased production costs, which also has in the past and could continue to result in lower production volumes. For example, the Company is currently mining and processing lower grade bauxite in Western Australia, which has caused increased production costs. Changes in the costs of bauxite, alumina, energy and other inputs during a particular period may not be adequate to offset concurrent sharper decreases in the price of alumina or aluminum and could have a material adverse effect on our operating results. In addition, due to global supply chain disruptions, we may not be able to obtain sufficient supply of our raw materials, energy, or other key inputs in a timely manner, including due to shortages, inflationary cost pressures, or transportation delays, which could cause disruption in our operations or production curtailments. Though we have been able to source our raw materials and other key inputs in adequate amounts from other suppliers or our own stockpiles to date, there can be no guarantee that our operations or profitability will not be adversely affected in the future. Our suppliers, vendors, and customers could experience similar constraints that could impact our operations and profitability. 19 Business Strategy Risks We have incurred, and may incur in the future, significant costs associated with our strategy to be a lower cost, competitive, and integrated aluminum production business and we may not be able to realize the anticipated benefits from announced plans, programs, initiatives relating to our portfolio, capital investments, and developing technologies. We are executing a strategy to be a low cost, competitive, and integrated aluminum production business by implementing productivity and cost-reduction initiatives, optimizing our portfolio of assets, and investing in technology to advance our climate-related ambitions. We have been taking decisive actions to lower the cost base of our operations through procurement strategies for raw materials, labor productivity, improving operating performance, deploying Company-wide business process models, and reducing overhead costs. In 2019, the Company announced a five-year strategic portfolio review of smelting and refining capacity to improve cost positioning, including curtailment, closure or divestiture of 1.5 and 4 million metric tons of smelting and refining capacity, respectively. Through January 2024, Alcoa completed its review of refining capacity and reached approximately 93 percent of its target for smelting capacity. The strategic portfolio review is continuing. Though we have made progress on this strategy, we may not be able to realize the expected benefits or cost savings from this strategy. We have taken actions and may continue to plan and execute other actions to grow or streamline our portfolio. There is no assurance that anticipated benefits of our strategic actions will be realized. With respect to portfolio optimization actions such as divestitures, curtailments, closures, and restarts, we may face barriers to exit from unprofitable businesses or operations, including high exit costs or objections from various stakeholders, the lack of availability of buyers willing to purchase such assets at prices acceptable to us, delays due to any regulatory approvals or government intervention, continuing environmental obligations, and third parties unwilling to release us from guarantees or other credit support provided in connection with the sale of assets. In addition, we may retain liabilities from such transactions, have ongoing indemnification obligations, and incur unforeseen liabilities for divested entities if a buyer fails to honor all commitments. Our business operations are capital intensive, and portfolio optimization actions such as the curtailment or closure of operations or facilities may include significant costs and charges, including asset impairment or restructuring charges and other measures. There can be no assurance that such actions will be undertaken or completed in their entirety as planned at the anticipated cost or will result in being beneficial to the Company. The effect of closures, curtailments, and divestitures over time will reduce the Company’s cash flow and earnings capacity and result in a less diversified portfolio of businesses, and we will have a greater dependency on remaining businesses for our financial results. Additionally, curtailing certain existing facilities, whether temporarily or permanently, may require us to incur curtailment and carrying costs related to those facilities, as well as further increased costs should production be resumed at any curtailed facility, which could have an adverse effect on our business, financial results, and results of operations. Our announced multi-year portfolio review of Company assets includes evaluating our portfolio to assess each facility’s strategic benefits, competitiveness, and viability. The aim of this review, which is expected to be complete in 2024, is for the Company to be a low cost first quartile producer across our alumina and aluminum segments, and have up to 85% of smelting production from renewable energy sources. Our announced roadmap of technologies under development to support our long-term goal of being one of the lowest carbon-producing alumina refineries and aluminum smelters includes investments to develop, implement, and commercialize new technologies to reduce carbon emissions in the aluminum production process. We may not be able to implement, fully or in a cost-effective or timely way, the actions necessary to achieve this strategy and goal, which actions could include capturing, maintaining and/or expanding margins from new products, continued product innovation investment in research and development projects and new technologies, successful deployment and commercialization of effective new technologies, and cost- effective long-term energy solutions. We may not achieve the expected results from technology innovation or other benefits, including certain emissions or environmental-related goals, or expected profitability associated with this strategy. In addition, even if we are able to cost effectively develop our technologies, alternatives to technologies may be more acceptable to the market. Executing these actions also diverts senior management time and resources from our regular business operations, each of which could adversely affect the Company’s business, financial condition, and results of operations. Joint ventures, other strategic alliances, and strategic business transactions may not achieve intended results. We may experience operational challenges in integrating or segregating assets for such a venture or transaction, and such a venture or transaction could increase the number of our outstanding shares or amount of outstanding debt and affect our financial position. We participate in joint ventures, have formed strategic alliances, and may enter into other similar arrangements in the future. For example, AWAC is an unincorporated global joint venture between Alcoa and Alumina Limited. AWAC consists of a number of affiliated entities, which own, operate, or have an interest in, bauxite mines and alumina refineries, as well as an aluminum smelter, in seven countries. In addition, Alcoa is minority owner of a joint venture with the Saudi Arabian Mining Company (Ma’aden). Although the Company has, in connection with these and our other existing joint ventures and strategic alliances, sought to protect our interests, joint ventures and strategic alliances inherently involve special risks. Whether or not the Company holds majority interests or 20 maintains operational control in such arrangements, our joint venture and other business partners may take certain actions and positions, or experience difficulties, that may negatively impact the Company and/or its reputation, such as: • Advancing economic, political, social, or business interests or goals that are inconsistent with, or opposed to those of, the Company and our stakeholders; • Exercising veto rights to block actions that we believe to be in our or the joint venture’s or strategic alliance’s best interests; • Taking action contrary to our policies or objectives with respect to our investments; and, • As a result of financial or other difficulties, be unable or unwilling to fulfill their obligations under the joint venture, strategic alliance, or other agreements, such as contributing capital to expansion or maintenance projects. We continuously evaluate and may in the future enter into additional strategic business transactions. Any such transactions could happen at any time, could be material to our business, and could take any number of forms, including, for example, an acquisition, merger, sale or distribution of certain assets, refinancing, or other recapitalization or material strategic transaction. There can be no assurance that our joint ventures, strategic alliances, or additional strategic business transactions will be beneficial to us, whether due to the above-described risks, unfavorable global economic conditions, increases in costs, foreign currency fluctuations, political risks, government interventions, retained liabilities, indemnification obligations, or other factors. Evaluating potential transactions and integrating completed ones may divert the attention of our management from ordinary operating matters. In addition, to the extent we consummate an agreement for the sale and disposition of an asset or asset group we may experience operational difficulties segregating them from our retained assets and operations, which could impact the execution or timing of such dispositions and could result in disruptions to our operations and/or claims for damages, among other things. If we engage in a strategic transaction, we may require additional financing that could result in an increase in the number of our outstanding shares of stock or the aggregate amount and/or cost of our debt, which may result in an adverse impact to our credit ratings or adversely impact our business, financial condition, or results of operations. The number of shares of our stock or the aggregate principal amount of our debt that we may issue in connection with such a transaction could be significant. Global Operational Risks Our global operations expose us to risks related to economic, political, and social conditions, including the impact of trade policies and adverse industry publicity, which may negatively impact our business and our ability to operate in certain locations. We are subject to risks associated with doing business internationally, including foreign or domestic government fiscal and political crises, political and economic disputes and sanctions, social requirements and conditions, and adverse industry publicity. These factors, among others, bring uncertainty to the markets in which we compete, and may adversely affect our business, financial condition, and results of operations. In addition, we operate in communities around the world, and social issues in the communities where we operate have affected and could continue to affect our ability to maintain our social license to operate; furthermore, incidents related to our industry have generated and could continue to generate negative publicity and impact the social acceptability of our operations in such locations, including by damaging our reputation, our relationships with stakeholders, and our competitive position. Growing expectations of hosting communities as well as increasing social activism pose additional challenges to us maintaining our social license to operate and expanding our business. For example, community and stakeholder concerns in Juruti, Brazil have affected our ability to access certain mining areas at times. In certain jurisdictions, there are increasing regulatory developments to protect minority groups, such as Indigenous people in Australia. This could have an adverse effect on our ability to secure expansions to our operations at all or in the expected timeframe, could significantly increase our cost of doing business, and could disrupt our operations. In the United States, in recent years, the U.S. government has taken actions with respect to the implementation of significant changes to certain trade policies, including import tariffs and quotas, modifications to international trade policy, the withdrawal from or renegotiation of certain trade agreements, and other changes that have affected U.S. trade relations with other countries, any of which may require us to significantly modify our current business practices or may otherwise materially and adversely affect our business or those of our customers. The U.S. government continues to review trade policies and negotiate new agreements with countries globally that could impact the Company. For example, the U.S. government is negotiating agreements with countries in relation to the tariffs initially applied under Section 232 of the Trade Expansion Act of 1962 (Section 232) in 2018. In 2021, the U.S. and European Union (EU) reached agreement whereby the U.S. lifted the Section 232 duties and applied a tariff-rate-quota allowing duty-free importation of aluminum from the EU based on historical volumes, and the EU suspended its retaliatory tariffs that had been in place on certain U.S. products. The U.S. and EU began discussions in 2022 on a Global Arrangement on Sustainable Steel and Aluminum and the parties continue negotiations for a high-level framework. To the extent that further agreements are reached on a broader range of imports, or these tariffs and other trade actions result in a decrease in international demand for aluminum produced in the United States or otherwise negatively impact demand for our products, our business may be adversely impacted, and could further exacerbate aluminum and alumina price volatility and overall market uncertainty. 21 We are exposed to fluctuations in foreign currency exchange rates and interest rates, as well as inflation and other economic factors in the countries in which we operate. Economic factors, including inflation and fluctuations in foreign currency exchange rates and interest rates, competitive factors in the countries in which we operate, and volatility or deterioration in the global economic and financial environment, have in the past and could in the future affect our business, financial condition, and results of operations. Changes in the valuation of the U.S. dollar against other currencies, particularly the Australian dollar, Brazilian real, Canadian dollar, euro, and Norwegian kroner, which are the currencies of certain countries in which we have operations, may affect our profitability, as some important inputs are purchased in other currencies, while our products are generally sold in U.S. dollars. As the U.S. dollar strengthens, the cost curve shifts down for smelters outside the United States, but costs for our U.S. smelting portfolio may not decline. Changes in tax laws or exposure to additional tax liabilities could affect our future profitability. We are subject to income taxes in both the United States and various non-U.S. jurisdictions. Changes in foreign and domestic tax laws, regulations, or policies, or their interpretation and application by regulatory bodies, or exposure to additional tax liabilities could affect our future profitability. For example, in October 2021, a new framework for international tax was agreed to by 137 member countries and jurisdictions of the Organisation for Economic Co-operation and Development (OECD), including the two-pillar solution for a global minimum level of taxation. While the future of Pillar One remains uncertain, it is likely that the global minimum tax under Pillar Two will be fully effective in the countries in which we operate by January 1, 2025. We are continuing to evaluate the Pillar Two Framework and its potential impact on future periods. Our domestic and international tax liabilities are dependent upon the distribution of profits among the different jurisdictions in which we operate. Our tax expense includes estimates of additional tax that may be incurred for tax exposures and reflects various estimates and assumptions. The assumptions include assessments of future earnings of the Company that could impact the valuation of our deferred tax assets. Our future results of operations could be adversely affected by changes in the effective tax rate as a result of a change in the mix of earnings in countries with differing statutory tax rates, changes in the overall profitability of the Company, changes in tax legislation and rates, changes in generally accepted accounting principles, and changes in the valuation of deferred tax assets and liabilities. Significant changes to tax laws or regulations and the positions of taxing authorities could have a substantial impact, positive or negative, on our effective tax rate, cash tax expenditures and cash flows, and deferred tax assets and liabilities. For example, in December 2023, the U.S. Treasury Department clarified that commercial grade aluminum can qualify for Section 45X of the Advanced Manufacturing Tax Credit, enacted as part of the Inflation Reduction Act (IRA). Section 45X provides a tax credit for certain costs incurred in the production of critical minerals, including aluminum. In the fourth quarter of 2023, the Company recorded a full year benefit of $36 related to its Massena West (New York) smelter and its Warrick smelter. We are subject to tax audits by various tax authorities in many jurisdictions, such as Australia, Brazil, Canada, and Norway. For example, in July 2020, AofA received Notices of Assessment (the Notices) from the Australian Taxation Office (ATO) related to the pricing of certain historic third-party alumina sales. The Notices asserted claims for income tax payable by AofA of approximately $145 (A$214), exclusive of interest and penalties. The Notices also included claims for compounded interest on the tax amount totaling approximately $481 (A$707). In accordance with the ATO’s dispute resolution practices, AofA paid 50% of the assessed income tax amount exclusive of interest and any penalties to the ATO during the third quarter of 2020, and the ATO is not expected to seek further payment prior to final resolution of the matter. If AofA is ultimately successful, any amounts paid to the ATO as part of the 50% payment would be refunded. The ATO has also issued a position paper with its preliminary view on the imposition of administrative penalties related to the tax assessment, proposing penalties of approximately $87 (A$128). AofA disagrees with the ATO’s proposed position on penalties and submitted a response to the position paper in the fourth quarter of 2020. After the ATO completes its review of AofA’s response, the ATO could issue a penalty assessment. The Company does not agree with the ATO’s positions, and AofA will continue to defend this matter in the Australian Courts. We regularly assess the potential outcomes of examinations by tax authorities in determining the adequacy of our provision for income taxes. The results of tax audits and examinations of previously filed tax returns or related litigation and continuing assessments of our tax exposures could materially affect our financial results. See Part II Item 8 of this Form 10-K in Notes Q and S to the Consolidated Financial Statements under captions Unrecognized Tax Benefits and Contingencies, respectively. 22 We face significant competition globally within and beyond the aluminum industry, which may have an adverse effect on profitability. We compete with a variety of both U.S. and non-U.S. aluminum industry competitors as well as with producers of other materials, such as steel, titanium, plastics, composites, ceramics, and glass, among others. Use of such materials could reduce the demand for aluminum products, which may reduce our profitability and cash flow. Factors affecting our ability to compete include increased competition from overseas producers, our competitors’ pricing strategies, the introduction or advancement of new technologies and equipment by our competitors or our customers, changes in our customers’ strategy or material requirements, and our ability to maintain the cost-efficiency of our facilities. Certain competitors possess financial, technical and management resources to develop and market products that may compete favorably against our products, and consolidation among our competitors may also allow them to compete more effectively. In addition, our competitive position depends, in part, on our ability to operate as an integrated aluminum value chain, leverage innovation expertise across businesses and key end markets, and access an economical power supply to sustain our operations in various countries. See Business—Competition. We may not be able to obtain or maintain adequate insurance coverage. We maintain various forms of insurance, including insurance covering claims related to our properties and risks associated with our operations. Our existing property and liability insurance coverages contain exclusions and limitations on coverage. In connection with renewals of insurance, we have experienced, or could experience in the future, additional exclusions and limitations on coverage, significantly increased self-insured retentions and deductibles, and significantly higher premiums. We may not be able to procure adequate insurance coverage for certain risks, if at all, and existing insurance arrangements may not provide sufficient coverage or reimbursement for significant costs that may arise. As a result, in the future our insurance coverage may not cover claims to the extent that it has in the past and the costs that we incur to procure insurance may increase significantly, either of which could have an adverse effect on our results of operations. Our business, financial condition and results of operations could be adversely affected by disruptions in the global economy caused by ongoing regional conflicts. The global economy has been negatively impacted by ongoing regional conflicts, such as the conflict between Russia and Ukraine and the conflict in the Middle East. Such adverse and uncertain economic conditions have exacerbated supply chain disruptions and increased our costs for energy, particularly in Spain, and for certain raw materials. In 2022, in response to the conflict between Russia and Ukraine, we ceased purchasing raw materials from and selling our products to Russian businesses. Furthermore, governments in the U.S., United Kingdom and European Union have each imposed export controls on certain products and financial and economic sanctions on certain industry sectors and parties in Russia. To date, these actions and other ongoing regional conflicts and responses have not had a material adverse impact on the Company’s business, but they could have material negative impacts if the conflicts continue and global sales of our products are affected. Increased trade barriers or restrictions on global trade, or retaliatory measures taken in response, as well as the destabilizing effects of regional conflict, could also adversely affect our business, financial condition and results of operations by limiting sales, restricting access to required raw materials, or raising costs thereof. Destabilizing effects that these ongoing regional conflicts may pose for the global oil and natural gas markets could also adversely impact our operations by further increasing our energy costs. In addition, further escalation of geopolitical tensions related to such conflicts could result in loss of property, cyber attacks, additional supply disruptions, an inability to obtain key supplies and materials, reduced production and sales, and/or operational curtailments, and adversely affect our business and our supply chain. 23 Legal and Regulatory Risks We may be exposed to significant legal proceedings, investigations, or changes in foreign and/or U.S. federal, state, or local laws, regulations, or policies. Our results of operations or liquidity in a particular period could be affected by new or increasingly stringent laws, regulatory requirements or interpretations, or outcomes of significant legal proceedings or investigations adverse to the Company. We may become subject to unexpected or rising costs associated with business operations, compliance measures, or provision of health or welfare benefits to employees due to changes in laws, regulations, or policies. We are also subject to a variety of legal and compliance risks, including, among other things, potential claims relating to health and safety, environmental matters, intellectual property rights, product liability, data privacy, taxes and compliance with U.S. and foreign export, anti-bribery, and competition laws, and sales and trading practices. We could be subject to fines, penalties, interest, or damages (in certain cases, treble damages). In addition, if we violate the terms of our agreements with governmental authorities, we may face additional monetary sanctions and other remedies as a court deems appropriate. While we believe we have adopted appropriate risk management and compliance programs to address and reduce these risks, the global and diverse nature of our operations means that these risks continue to exist, and additional legal proceedings and contingencies may arise from time to time. In addition, various factors or developments can lead the Company to change current estimates of liabilities or make estimates for matters previously not susceptible of reasonable estimates, such as a significant judicial ruling, judgment, or settlement, or significant regulatory developments or changes in applicable law. A future adverse ruling or settlement or unfavorable changes in laws, regulations or policies, or other contingencies that the Company cannot predict with certainty could have a material adverse effect on our results of operations or cash flows in a particular period. See Part I Item 3 of this Form 10-K and Part II Item 8 of this Form 10-K in Note S to the Consolidated Financial Statements under caption Contingencies. Climate change, climate change legislation or regulations, and efforts to reduce greenhouse gases (GHG) and build operational resilience to extreme weather conditions may adversely impact our operations and markets. Energy is a significant input in a number of our operations and there is growing recognition that consumption of energy derived from fossil fuels is a contributor to climate change. Several governments or regulatory bodies in areas where we operate, such as in the United States, Asia, Brazil, Canada, and the EU, have introduced or are contemplating legislative and regulatory change in response to the potential impacts of climate change, which could result in changes to the margins of GHG intensive assets and energy-intensive assets. These regulatory mechanisms relating to carbon may be either voluntary or legislated and the inconsistency of associated regulations may impact our operations directly or indirectly through customers or our supply chain. Assessments of the potential impact of future climate change legislation, regulation, and international treaties and accords are uncertain, given the wide scope of potential regulatory change in countries in which we operate and the diversity in the scope and development of such regulations. For example, in 2021, the European Commission proposed a Carbon Border Adjustment Mechanism (CBAM) as a levy on carbon- intensive imports, which was provisionally approved in December 2022. In October 2023, the CBAM entered into application of its transitional phase, which will apply to aluminum, with the first reporting period for importers ending January 31, 2024, and full implementation of CBAM will begin on January 1, 2026. We may realize increased capital expenditures, costs, or taxes resulting from required compliance with revised or new legislation or regulations, including costs to purchase or profits from sales of allowances or credits under a carbon credit/pricing or “cap and trade” system, increased insurance premiums and deductibles as new actuarial tables are developed to reshape coverage, a change in competitive position relative to industry peers, and changes to profit or loss arising from increased or decreased demand for goods produced by the Company and, indirectly, from changes in costs of goods sold. Though we are investing in technology to reduce the production of greenhouse gases in the manufacture of our products, such as our ELYSIS partnership aluminum smelting technology and other technologies that are designed to limit the production of carbon in alumina refining, in certain aspects of our operations, our ability to reduce our GHG emissions is also dependent on the actions of third parties, especially energy providers, and our ability to make significant changes in our GHG emissions. As a result, we could face additional costs associated with any new regulation of GHG emissions, and our ability to modify our operations to avoid these costs may be limited in the near term. In addition, regulations to combat climate change could impact the competitiveness of the Company, including the attractiveness of the locations of some of the Company’s assets. The global focus on climate is raising awareness in all countries, such as the agreement at the 26th United Nations Climate Change Conference of the Parties (COP26) by many governments of countries where the Company operates to combat deforestation, which could adversely affect our ability to mine and operate in sensitive areas like the Jarrah Forest and the Amazon. 24 The potential physical impacts of climate change or extreme weather conditions on the Company’s operations are highly uncertain and will be particular to the geographic circumstances. These may include changes in rainfall patterns, wildfires, heat waves, shortages of water or other natural resources, changing sea levels, changing storm patterns, flooding, increased frequency and intensities of storms, and changing temperature levels. Any of these may disrupt our operations, hinder transportation of products to us or of our products to customers, interrupt energy supplies, prevent access to our facilities, negatively impact our suppliers’ or customers’ operations and their ability to fulfill contractual obligations to us, and/or cause damage to our facilities, all of which may increase our costs, reduce production, and adversely affect our business, financial condition, or results of operations. Measures to mitigate or adapt our assets, including current operations, closed or curtailed locations, and impoundment structures, to the potential physical climate-related risks may increase costs. In addition, we rely on our customers and suppliers to assess their own potential physical impacts of climate change and implement appropriate mitigation or adaptation actions. Thus, we may not be able to influence the resiliency of our suppliers or customers to potential physical impacts of climate change. We may not achieve our strategies or expectations relating to environmental, social, and governance considerations, which could expose us to potential liabilities, increased costs, reputational harm, and other adverse effects on our business. We have established strategies and expectations relating to certain environmental, social, and governance considerations, including regarding reducing GHG emissions, reducing water usage, reducing waste, improving safety performance, and managing social risks across our operations. These strategies and expectations reflect our current plans and aspirations, and there is no guarantee that they will be achieved. Our ability to achieve any such strategies or expectations is subject to numerous factors and conditions, some of which are outside of our control. Examples of such factors include, but are not limited to, evolving legal, regulatory, and other standards, processes, and assumptions, the pace of scientific and technological developments, increased costs, the availability of requisite suppliers, energy sources, or financing, and changes in carbon markets. Failures or delays (whether actual or perceived) in achieving our strategies or expectations related to these matters could expose us to potential liabilities, increased costs, reputational harm, and other adverse effects on our business. Furthermore, many governments, regulators, investors, employees, customers, media outlets, and other stakeholders are increasingly focused on environmental, social, and governance considerations relating to businesses, including climate change and GHG emissions, human capital, and diversity, equity and inclusion. Our business may face increased scrutiny from such stakeholders and if our strategies relating to environmental, social, and governance considerations do not meet stakeholder expectations and standards, which continue to evolve and may differ across jurisdictions in which we operate, our business, financial condition, results of operations, and reputation could be adversely impacted. Similarly, our failure or perceived failure to pursue or fulfill our strategies and expectations; comply with federal, state, regional, or international ethical, environmental, or other standards, regulations, or expectations; adhere to public statements; satisfy reporting standards; or meet evolving and varied stakeholder expectations within the timelines we announce, or at all, could have adverse operational, reputational, financial, and legal impacts. We are subject to a broad range of health, safety and environmental laws, regulations, and other requirements in the jurisdictions in which we operate that may expose us to substantial claims, costs, and liabilities. Our operations worldwide are subject to numerous complex and increasingly stringent federal, state, local and foreign laws, regulations, policies, and permitting, licensing, and other requirements, including those related to health, safety, environmental, and waste management and disposal matters, which may expose us to substantial claims, costs, and liabilities. We may be subject to fines, penalties, and other damages, such as natural resource or community damages and the costs associated with the investigation and cleanup of soil, surface water, groundwater, and other media under laws such as CERCLA (commonly known as Superfund) or similar U.S. and foreign regulations. These laws, regulations, policies, and permitting, licensing, and other requirements could change or could be, and have been, applied or interpreted in ways that could (i) require us to enjoin, curtail, close or otherwise modify our operations and sites, including the implementation of corrective measures, the installation of additional equipment or structures, or the undertaking of other remedial actions, or (ii) subject us to enforcement risk or impose on or require us to incur additional capital expenditures, compliance or other costs, fines, penalties, or damages, any of which could adversely affect our results of operations, cash flows and financial condition, and the trading price of our common stock. The costs of complying with such laws, regulations, policies, and other requirements, including participation in assessments, remediation activities, and cleanups of sites, as well as internal voluntary programs, are significant and will continue to be so for the foreseeable future. Environmental laws may impose cleanup liability on owners and occupiers of contaminated property, including previously owned, non-operational, or divested properties, regardless of whether the owners and occupiers caused the contamination or whether the activity that caused the contamination was lawful at the time it was conducted. As a result, we may be subject to claims arising from current or former conditions at sites that we own or operate currently, as well as at sites that we owned or operated in the past, and at contaminated sites that have always been owned or operated by third parties, regardless of whether we caused the contamination or whether the activity that caused the contamination was lawful at the time it was conducted. Liability may be without regard to fault and may be joint and several, so that we may be held responsible for more than our share of the contamination or other damages, or even for the entire share. 25 In addition, because environmental laws, regulations, policies, and other requirements are constantly evolving, we will continue to incur costs to maintain compliance and such costs could increase materially and prove to be more limiting and costly than we anticipate. Evolving standards and expectations can result in increased litigation and/or increased costs, all of which can have a material and adverse effect on our business operations, earnings, and cash flows. Future compliance with environmental, health and safety legislation and other regulatory requirements or expectations may prove to be more limiting and costly than we anticipate and may disrupt our business operations and require significant expenditures. Our business, financial condition, or results of operations in a particular period could be materially affected by certain health, safety, or environmental matters, including remediation costs and damages related to certain sites. Our operations include impoundment structures, which could impact the environment or cause exposure to hazardous substances or other damage, which could result in material liabilities to us. Some of our operations generate hazardous waste and other byproducts, which we contain in tailing facilities, residue storage areas, and other structural impoundments that are subject to extensive regulation and increasingly strict industry standards. Failure of storage areas caused by extreme weather events, erosion, or unanticipated structural failure of impoundments could result in severe, and in some cases catastrophic, damage to the environment, natural resources, or property, or personal injury and loss of life. The impact that our operations may have on the environment, as well as exposures to hazardous substances or wastes associated with our operations, could result in significant costs, civil or criminal damages, fines or penalties, and enforcement actions issued by regulatory or judicial authorities enjoining, curtailing, or closing operations or requiring corrective measures, any of which could have a material adverse effect on Alcoa. Available Capital and Credit-Related Risks Our business and growth prospects may be negatively impacted by limits on our ability to fund capital expenditures. We require substantial capital to invest in growth opportunities and to maintain and prolong the life and capacity of our existing facilities. Our ability to generate cash flows is affected by many factors, including market and pricing conditions. Insufficient cash generation or capital project overruns may negatively impact our ability to fund as planned our sustaining and return-seeking capital projects, and such postponement in funding capital expenditures or inadequate funding to complete projects could result in operational issues. For 2024, we project capital expenditures of $550, of which $460 is for sustaining capital projects and $90 is for return-seeking capital projects. If our technology research and development projects prove feasible with an acceptable expected rate of return, our capital expenditures for return-seeking projects would increase significantly over the next several years. To the extent our access to competitive financial, credit, capital, and/or banking markets becomes impaired, our operations, financial results, and cash flows could be adversely impacted. We may also need to address commercial, political, and social issues in relation to capital expenditures in certain of the jurisdictions in which we operate. If our interest in our joint ventures is diluted or we lose key concessions, our growth could be constrained. Any of the foregoing could have a material adverse effect on our business, results of operations, financial condition, and prospects. Deterioration in our credit profile or increases in interest rates could increase our costs of borrowing money and limit our access to the capital markets and commercial credit. The major credit rating agencies evaluate our creditworthiness and issue specified credit ratings. These ratings are based on a number of factors, including our financial strength and financial policies as well as our strategies, operations, and execution of announced actions. These credit ratings are limited in scope and do not address all material risks related to an investment in us, but rather reflect only the view of each rating agency at the time its rating is issued. Nonetheless, the credit ratings we receive impact our borrowing costs as well as our access to sources of capital on terms advantageous to our business. Failure to obtain or maintain sufficiently high credit ratings could adversely affect our interest rates in financings, our liquidity, or our competitive position, and could also restrict our access to capital markets. In addition, our credit ratings could be lowered or withdrawn entirely by a rating agency if, in its judgment, the circumstances warrant. If a rating agency were to downgrade our rating, our borrowing costs could increase, our funding sources could decrease, and we would need to rely on our cash flows from operations. As a result of these factors, a downgrade of our credit ratings could have a materially adverse impact on our future operations, cash flows, and financial position. 26 Our indebtedness restricts our current and future operations, which could adversely affect our ability to respond to changes in our business and manage our operations, and failure to comply with the agreements relating to our outstanding indebtedness, including due to events beyond our control, could result in an event of default that could materially and adversely affect our business, financial condition, results of operations, or cash flows. Alcoa and Alcoa Nederland Holding B.V. (ANHBV), a wholly-owned subsidiary of Alcoa, are party to a revolving credit agreement with a syndicate of lenders and issuers named therein (as subsequently amended, the Amended Revolving Credit Facility). Alcoa and ANHBV are also party to a revolving credit agreement available to be drawn in Japanese yen (as subsequently amended, the Amended Japanese Yen Revolving Credit Facility). The terms of the Amended Revolving Credit Facility, Amended Japanese Yen Revolving Credit Facility, and the indentures governing our outstanding notes contain covenants that could impose significant operating and financial restrictions on us upon non-compliance with them, including on our ability to, among other things: • Make investments, loans, advances, and acquisitions; • Amend certain material documents; • Dispose of assets; • Incur or guarantee additional debt and issue certain disqualified equity interests and preferred stock; • Make certain restricted payments, including limiting the amount of dividends on equity securities and payments to redeem, repurchase or retire equity securities or other indebtedness; • Engage in transactions with affiliates; • Materially alter the business we conduct; • Enter into certain restrictive agreements; • Create liens on assets to secure lenders and issuers; • Consolidate, merge, sell or otherwise dispose of all or substantially all of Alcoa’s, ANHBV’s or a subsidiary guarantor’s assets; and, • Take any actions that would reduce our ownership of AWAC entities below an agreed level. The Amended Revolving Credit Facility requires us to comply with financial covenants which includes maintaining an interest expense coverage ratio of not less than 3.00 to 1.00 for the 2024 fiscal year, and a debt to capitalization ratio not to exceed .60 to 1.00. As of January 1, 2025, the minimum interest coverage ratio requirement will revert to 4.00 to 1.00. The results of the calculation of these ratios, when considering the Company’s existing debt obligations, affects and could restrict the amount of additional borrowing capacity under the Company’s Amended Revolving Credit Facility or other credit facilities, and ANHBV’s ability to make restricted payments, to make investments and to incur indebtedness. In addition, obligations under the Amended Revolving Credit Facility are secured by, subject to certain exceptions, a first priority security interest in substantially all assets of the Company, the Borrower, the material domestic wholly-owned subsidiaries of the Company, and the material foreign wholly-owned subsidiaries of the Company located in Australia, Brazil, Canada, Luxembourg, the Netherlands, Norway, and Switzerland including equity interests of certain subsidiaries that directly hold equity interests in AWAC entities. The Amended Japanese Yen Revolving Credit Facility includes covenants that are substantially the same as those included in the Amended Revolving Credit Facility. In addition, obligations under the Amended Japanese Revolving Credit Facility are secured by, subject to certain exceptions, a first priority security interest in substantially all assets of the Company, the Borrower, the material domestic wholly-owned subsidiaries of the Company, and the material foreign wholly-owned subsidiaries of the Company located in Australia, Brazil, Canada, Luxembourg, the Netherlands, Norway, and Switzerland including equity interests of certain subsidiaries that directly hold equity interests in AWAC entities. Our ability to comply with these agreements may be affected by events beyond our control, including prevailing economic, financial, and industry conditions. These covenants could have an adverse effect on our business by limiting our ability to take advantage of financing, merger and acquisition, or other opportunities. The breach of any of these covenants or restrictions could result in a default under the Amended Revolving Credit Facility, the Amended Japanese Yen Revolving Credit Facility, or the indentures governing our notes and other outstanding indebtedness, including such indebtedness for which the Company is a guarantor. See Part II Item 7 of this Form 10-K in Management’s Discussion and Analysis of Financial Condition and Results of Operations under caption Liquidity and Capital Resources – Financing Activities for more information on the restrictive covenants in the Company’s revolving credit facilities. If an event of default were to occur under any of the agreements relating to our outstanding indebtedness, including the Amended Revolving Credit Facility, the Amended Japanese Yen Revolving Credit Facility, and the indenture governing our notes, we may not be able to incur additional indebtedness under the Amended Revolving Credit Facility or the Amended Japanese Yen Revolving Credit Facility and the holders of the defaulted debt could cause all amounts outstanding with respect to that debt to be due and 27 payable immediately. We cannot assure that our assets or cash flow would be sufficient to fully repay borrowings under our outstanding debt instruments if accelerated upon an event of default, which could have a material adverse effect on our ability to continue to operate as a going concern. Further, if we are unable to repay, refinance, or restructure our secured indebtedness, the holders of such indebtedness could proceed against the collateral securing that indebtedness. In addition, any event of default or declaration of acceleration under one debt instrument also could result in an event of default under one or more of our other debt instruments. We cannot guarantee that we will continue to return capital to our stockholders through the payment of cash dividends and/or the repurchase of our common stock. The reduction or discontinuation of the payment of cash dividends to our stockholders or the repurchase of our shares of common stock could adversely affect the market price or liquidity of our shares. In October 2021, the Company’s Board of Directors initiated a quarterly cash dividend program, at $0.10 per share and authorized a $500 common stock repurchase program, which was fully used with the completion of $150 in repurchases during the third quarter of 2022. In July 2022, the Board of Directors approved an additional common stock repurchase program under which the Company may purchase shares of its outstanding common stock up to an aggregate transactional value of $500, depending on the Company’s continuing analysis of market, financial, and other factors (the July 2022 authorization). This common stock repurchase authorization does not have a predetermined expiration date. As of December 31, 2023, $500 remained available for repurchase pursuant to this authorization. The Company is under no obligation to pay any cash dividends to stockholders or to repurchase our outstanding shares of common stock at any particular price or at all, and the payment of dividends and/or repurchases of stock may be limited, suspended, or discontinued at any time in our discretion and without notice. The Company set each of the current dividend and July 2022 authorizations at a level it believes is sustainable throughout the commodity cycle, based on our current financial position and reasonable expectations of cash flow. In addition, as described elsewhere in this “Risk Factors” section, the Company’s Amended Revolving Credit Facility and Amended Japanese Yen Revolving Credit Facility (as defined below) could inhibit the Company’s ability to make certain restricted payments, including the amount of dividends and payments to redeem, repurchase, or retire equity securities or other indebtedness, if the Company does not maintain certain financial ratios. The Company intends to pay dividends on a quarterly basis. Dividends on Alcoa Corporation common stock are subject to authorization by the Company’s Board of Directors. The payment, amount, and timing of dividends, if any, depends upon matters deemed relevant by the Company’s Board of Directors, such as Alcoa Corporation’s financial position, results of operations, cash flows, capital requirements, business condition, future prospects, any limitations imposed by law, credit agreements or senior securities, and other factors deemed relevant and appropriate. Declines in asset values or increases in liabilities, including liabilities associated with benefit plans or taxes, can reduce stockholders’ equity. A deficit in stockholders’ equity could limit our ability under Delaware law to pay dividends and repurchase shares in the future. The reduction, suspension, or elimination of our cash dividend or our common stock repurchase program could adversely affect the market price of our stock and/or significantly increase its trading price volatility. The payment of any future dividends and the existence of a common stock repurchase program could cause our stock price to be higher than it would otherwise be and could potentially reduce the market liquidity for our stock. Additionally, any future payment of dividends or repurchases of our common stock could negatively impact our financial position and our ability to fund ordinary and existing operations, capital expenditures, the payment of taxes, and growth or other opportunities. Cybersecurity Risks Cyber attacks, security breaches, system failures, software or application vulnerabilities, or other cyber incidents may threaten the integrity of our information technology infrastructure and other sensitive business information, disrupt our operations and business processes, expose us to potential liability, and result in reputational harm and other negative consequences that could have a material adverse effect on our business, financial condition, and results of operations. We depend on information and communications technology, networks, software, and related systems to operate our business, including production controls and operating systems at our facilities and systems for recording and processing transactions, interfacing with customers, financial reporting, and protecting the personal data of our employees and other confidential information. Our global operations require increased reliance on technology, which expose us to risks of theft of proprietary information, including trade secrets and other intellectual property that could have a material adverse effect on our business, financial condition, and results of operations. The protection of such information, as well as sensitive customer information, personal data of our employees, and other confidential information, is critical to us. We face global cybersecurity threats, which may range from uncoordinated individual attempts to sophisticated and targeted measures, known as advanced persistent threats, directed at the Company. In addition, a greater number of our employees are working remotely since the COVID-19 pandemic, which has generally increased cybersecurity vulnerabilities and risk to our information technologies systems. 28 Cyber attacks and other cyber incidents are becoming more frequent and sophisticated, are constantly evolving, and are being made by groups and individuals with significant resources and a wide range of expertise and motives. Cyber attacks and security breaches may include, but are not limited to, unauthorized attempts to access information or digital infrastructure, efforts to direct payments to fictitious parties, viruses, ransomware, malicious codes, hacking, phishing (including through social engineering), denial of service, human error, and other electronic security breaches, any of which could have a material adverse effect on our business, financial condition, and results of operations. As techniques used in cyber attacks change frequently and may not be immediately detectable, we may be unable to anticipate or detect these techniques, such as use of a zero-day exploit or unknown malware, immediately identify the scope and impact of an incident, contain the incident within our systems, or implement preventative or remediation measures., which may have a material adverse effect on our business, financial condition, and results of operations. In addition, we utilize third- party vendors for certain software applications, storage systems, and cloud computing services. Cyber attacks, security breaches, or other incidents on the information technology systems of our service providers or business partners could materially impact us. We have in the past experienced attempts and incidents by external parties to penetrate our and our service providers or business partners networks and systems. Such attempts and incidents to date have not had a material adverse effect on our business, financial condition, or results of operations We continue to assess potential cyber threats and invest in our information technology infrastructure to address these threats, including by monitoring networks and systems, training employees on cyber threats, and enhancing security policies of the Company and its third-party providers. While the Company continually works to strengthen our systems and security measures, safeguard information, and mitigate potential risks, there is no assurance that such actions will be sufficient to prevent or timely detect cyber attacks or security breaches. Some intrusions could manipulate or improperly use our systems or networks, disclose, or compromise confidential or protected information, destroy, or corrupt data, or otherwise disrupt our operations, and because of any of these things could have a material adverse effect on our business, financial condition, and results of operations. In addition, some cybersecurity incidents could negatively impact our reputation and competitive position, and could result in litigation with third parties, regulatory action, loss of business, theft of assets, and significant remediation costs, and because of any of these things, have a material adverse effect on our financial condition and results of operations. Such security breaches could also result in a violation of applicable U.S. and international privacy and other laws, and subject us to litigation and governmental investigations and proceedings, any of which could result in our exposure to material civil or criminal liability. For example, the European Union’s General Data Privacy Regulation subjects companies to a range of compliance obligations regarding the handling of personal data. In the event our operations are found to be in violation of the GDPR’s requirements, we may be subject to significant civil penalties, business disruption and reputational harm, any of which could have a material adverse effect on our business, financial condition, or results of operations. Some cyber attacks or breaches could require significant management attention and resources and result in the diminution of the value of our investment in research and development, which could have a material adverse effect on our business, financial condition, or results of operations. Though we have disaster recovery and business continuity plans in place, if our information technology systems, or those of our third- party providers, are damaged, breached, interrupted, or cease to function properly for any reason, and, if the disaster recovery and business continuity plans do not effectively resolve the incident on a timely basis, we may suffer interruptions in our ability to manage or conduct business and we may be exposed to reputational, competitive and business harm as well as litigation and regulatory action, which may materially and adversely impact our business, financial condition, or results of operations. Labor- and Pension-Related Risks Union or workforce disputes or arrangements and other employee relations issues, as well as labor market conditions, could adversely affect our business, financial condition, or results of operations. A significant portion of our employees are represented by labor unions or worker groups in a number of countries under various collective bargaining agreements or similar arrangements with varying durations and expiration dates. We may not be able to satisfactorily renegotiate our agreements when they expire. In addition, existing arrangements may not prevent strikes, work stoppages, work slowdowns, union organizing campaigns, or lockouts at our facilities in the future. We may also be subject to general country strikes or work stoppages unrelated to our business or collective bargaining agreements. A labor dispute or work stoppage of employees could have a material adverse effect on production at one or more of our facilities, and depending on the length of work stoppage, on our business, financial condition, or results of operations. Additionally, in the current competitive labor market, if we lose critical or a significant number of workers to attrition, it may be difficult or costly to find and recruit replacement employees, which could have a material adverse effect on our business, financial condition, and results of operations. 29 A decline in the liability discount rate, lower-than-expected investment return on pension assets and other factors could affect our business, financial condition, results of operations, or amount of pension funding contributions in future periods. Our results of operations may be negatively affected by the amount of expense we record for our pension and other postretirement benefit plans, reductions in the fair value of plan assets, and other factors. We calculate income or expense for our plans using actuarial valuations in accordance with accounting principles generally accepted in the United States of America (GAAP). These valuations reflect assumptions about financial market and other economic conditions, which may change based on changes in key economic indicators. The most significant year-end assumptions used by the Company to estimate pension or other postretirement benefit income or expense for the following year are the discount rate applied to plan liabilities and the expected long-term rate of return on plan assets. In addition, the Company is required to make an annual measurement of plan assets and liabilities, which may result in a significant charge to stockholders’ equity. See Part II Item 7 of this Form 10-K in Management’s Discussion and Analysis of Financial Condition and Results of Operations under caption Critical Accounting Policies and Estimates—Pension and Other Postretirement Benefits and Part II Item 8 of this Form 10-K in Note O to the Consolidated Financial Statements. Although GAAP expense and pension funding contributions are impacted by different regulations and requirements, the key economic factors that affect GAAP expense would also likely affect the amount of cash or securities we would contribute to the pension plans. Potential pension contributions include both mandatory amounts required under federal law and discretionary contributions to improve the plans’ funded status. While the Company took several actions in recent years to improve the funded status of its pension plans and adjust its asset allocation to reduce variance risk, declines in the discount rate or lower-than-expected investment returns on plan assets could have a material negative effect on our cash flows. Adverse capital market conditions could result in reductions in the fair value of plan assets and increase our liabilities related to such plans, adversely affecting our liquidity and results of operations. Item 1B. Unresolved Staff Comments. None. 30 Item 1C. Cybersecurity. Risk Management and Strategy The Company’s processes for assessing, identifying, and managing material risks from cybersecurity threats are integrated into our overall Enterprise Risk Management (ERM) process. As part of the ERM, the Company focuses on developing multi-layered, collaborative processes to identify, monitor, and manage risks from cybersecurity threats. Risks are grouped into categories that management can then assess, monitor, and prioritize based on the likelihood of an occurrence, level of impact, and mitigating factors. Our various cybersecurity risk management processes apply to various functions, including but not limited to, third-party suppliers and vulnerability management. We employ processes and technologies to bring visibility to, and protect against, cybersecurity risk, to include real time monitoring of network traffic. The Company also has a comprehensive body of policies and standards for assessing, identifying, and managing material risks from cybersecurity threats, including an incident response plan, business continuity plan, crisis management plan, as well as disaster recovery mechanisms, which are tested and updated. Additionally, the Company employs staff that are specifically dedicated to raising cybersecurity awareness and training within the organization. The Company engages third party assessors, consultants, and auditors to assist in assessing, identifying, and managing risk from cybersecurity threats. Third parties assist the Company by (i) providing regular penetration testing and vulnerability assessments; (ii) assessing and maintaining our formal incident response policies, including through the use of tabletop testing; and (iii) providing multiple sources of threat intelligence information that are fed directly into our technical security platforms, including ongoing network monitoring. The Company also has a comprehensive third party information security audit program in place. Alcoa has implemented processes designed to identify and mitigate cybersecurity threats associated with our use of third-party service providers. Such providers are subject to a security risk assessment prior to engagement to determine if they meet defined levels of security capabilities. Our master services agreements with third party service providers generally carry a number of security requirements, including audit rights for the Company. After engagement, third party service providers are subject to regular audits in which contract owners within Information Technology Automated Solutions (ITAS) validate that any certifications a vendor had upon engagement are maintained throughout the life of the agreement. We have in the past experienced attempts and incidents by external parties to penetrate our, our service providers’, and our business partners’ networks and systems. Such attempts and incidents to date have not had a material adverse effect on our business, financial condition, or results of operations. See Part I Item 1A of this Form 10-K for more information on risks. Governance The Alcoa Board of Directors (Board), in coordination with the Audit Committee, is responsible for the oversight of our cybersecurity risk management program. The Audit Committee and the Board receive regular updates regarding the state of the Company’s cybersecurity program, cybersecurity developments, and emerging threats. The Chief Information Security Officer (CISO) and the Chief Information Officer (CIO) regularly update the Audit Committee and the Board regarding the Company’s strategy to mitigate cybersecurity risks, which includes regular vulnerability assessments and employee training on cybersecurity matters. Alcoa’s CISO is responsible for maintaining identified material cybersecurity risks within the Company’s ERM platform. On a quarterly basis, the CISO reviews and updates risks, as well as the control procedures in place. These risks are regularly reported to the Audit Committee and Board. Alcoa’s CISO has twenty-five years of experience in Information Technology, carries multiple certifications in information security, and has extensive cybersecurity risk management experience in manufacturing organizations. The CISO closely collaborates with the CIO and Chief Financial Officer (CFO) in managing material risks from cybersecurity threats. Alcoa also maintains an information security steering committee, which oversees current and emerging cybersecurity risks to the Company. The steering committee is comprised of a cross-functional team of leaders from across Alcoa’s business groups, including the CISO and CIO. The Company has established comprehensive incident response plans that set forth the processes through which cybersecurity incidents are managed, including how management is informed of cybersecurity incidents. As part of these plans, incidents are evaluated, classified, and elevated to an executive team which includes the CISO and executives on the Crisis Response Team. Once elevated, these executives are ultimately responsible for the management, mitigation, and remediation of incidents. 31 Item 2. Properties. Alcoa Corporation’s principal executive office, located at 201 Isabella Street, Suite 500, Pittsburgh, Pennsylvania 15212-5858, is leased. Alcoa also leases several office facilities and sites, both domestically and internationally. In addition, Alcoa owns or has an ownership interest in its production sites, both domestically and internationally. Alcoa owns active mines and plants classified under the Alumina and Aluminum segments of its business. These include facilities and assets around the world used for Alcoa’s bauxite mining and alumina refining, aluminum smelting and casting production, and energy generation. Capacity and utilization of these facilities varies by segment and the level of demand for each product. See Part I Item 1 of this Form 10-K for additional information, including the ownership, capacity, and utilization of these facilities, used in the Alumina and Aluminum segments. A discussion of our bauxite mining properties is below. The following map shows the locations of our operations as of December 31, 2023: Alcoa Locations and Properties. Although Alcoa’s facilities vary in terms of age and condition, management believes that its facilities are suitable and generally adequate to support the current and projected operations of the business. See Part II Item 8 of this Form 10-K in Notes B and K to the Consolidated Financial Statements for more information on properties, plants, and equipment. Bauxite Mining Properties Alcoa has access to large bauxite deposit areas with mining rights that extend, in many cases, more than 15 years from the date of this Form 10-K. The Company obtains bauxite from its own resources and from those belonging to AWAC, located in the countries listed in the table below, as well as pursuant to both long-term and short-term contracts and mining leases. Tons of bauxite are reported on a zero-moisture basis in millions of dry metric tons (mdmt) unless otherwise stated. As of December 31, 2023, the Company’s individually material mining properties, as determined in accordance with subpart 1300 of Regulation S-K, are our bauxite mining properties in the Darling Range of Western Australia (Darling Range) and Juruti, Brazil (Juruti). 32 As used in this Form 10-K, the terms “mineral resource,” “measured mineral resource,” “indicated mineral resource,” “inferred mineral resource,” “mineral reserve,” “proven mineral reserve” and “probable mineral reserve” are defined and used in accordance with subpart 1300 of Regulation S-K. Under subpart 1300 of Regulation S-K, mineral resources may not be classified as “mineral reserves” unless the determination has been made by a qualified person (as defined under subpart 1300 of Regulation S-K) that the mineral resources can be the basis of an economically viable project. Part or all of the mineral deposits (including any mineral resources) in these categories may never be converted into mineral reserves. Further, except for the portion of mineral resources classified as mineral reserves, mineral resources do not have demonstrated economic value. Estimates of inferred mineral resources have too high of a degree of uncertainty as to their existence and may not be converted to a mineral reserve. Therefore, it should not be assumed that all or any part of an inferred mineral resource exists, that it can be the basis of an economically viable project, or that it will ever be upgraded to a higher category. Likewise, it should not be assumed that all or any part of measured or indicated mineral resources will ever be converted to mineral reserves. Management relies on estimates of our recoverable mineral reserves, which estimation is complex due to geological characteristics of the properties and the number of assumptions made and variable factors, some of which are beyond our control. The following table shows the AWAC and/or Alcoa share (proportion) of annual production tonnage at each of our bauxite mining properties and in the aggregate for each of the last three fiscal years. Summary of Attributable Annual Bauxite Production (mdmt) for the years ended December 31, 2023, 2022, and 2021, respectively: Country Property (Region) 2023 2022 2021 Australia Brazil Brazil Brazil Guinea Saudi Arabia Darling Range (Western Australia, WA) Juruti (Pará State) Trombetas (Pará State)(1) Poços de Caldas (Minas Gerais) Boké (Sangaredi) Al Ba’itha (Al Qassim) 34.7 5.8 2.0 0.4 3.5 1.2 47.6 (1) Amounts shown for the years ended December 31, 2022 and 2021, represent production prior to the Company’s sale of its interest in the MRN mine in April 2022. Related mining operations were not material to the Company’s business or financial condition after consideration of both quantitative and qualitative factors assessed in the context of the Company’s overall business and financial condition. 31.4 4.9 0.5 0.4 3.6 1.3 42.1 30.9 5.0 — 0.4 3.6 1.1 41.0 The following tables summarize certain information regarding our bauxite mining properties. The information that follows relating to Darling Range and Juruti is derived, for the most part, from the technical report summaries relating to such properties prepared in compliance with Item 601(b)(96) and subpart 1300 of Regulation S-K. Portions of the following information are based on assumptions, qualifications, and procedures that are not fully described herein. Reference should be made to the full text of the Technical Report Summary for Darling Range, Western Australia, dated February 21, 2024, with an effective date of December 31, 2023, filed as Exhibit 96.1 to this Form 10-K (the Darling Range TRS), and the Technical Report Summary for Juruti, Brazil, dated February 24, 2022, with an effective date of December 31, 2021, incorporated by reference as Exhibit 96.2 to this Form 10-K (the Juruti TRS), which are incorporated by reference herein. 33 Bauxite Interests and Operators: Property (Region) Access/Transportation Operator Owners’ Mining Rights(1) Expiration Date of Mining Rights Darling Range(2) (WA) Accessed by road. Ore transported via long-distance conveyor and rail to refineries. Juruti(3) (Pará State) Accessed by road from Juruti town, by boat along the Amazon River, or by air from Juruti Airport. Ore transported from the mine to Juruti port by company-operated rail. AofA 100% 2045 AWAB 100% 2100(4) Poços de Caldas (Minas Gerais) Accessed by road. Ore transported from the mine to the refinery by road. Alcoa Alumínio 100% 2031(4) Boké (Sangaredi) Accessed by road from Sangaredi and public airports. Ore transported by company-operated rail to Kamsar port. CBG 22.95% 2038 Al Ba’itha (Al Qassim) Accessed by road. Ore is transported to the refinery by rail and truck. MBAC 25.1% 2037 Titles, Rights, Leases or Options Mining lease from the WA Government. ML1SA. Mining licenses from the Government of Brazil and Pará. Mining rights do not have a legal expiration date. Operating licenses for the mine, washing plant, and exploration are in the process of being renewed. Mining licenses from the Government of Brazil and Minas Gerais. Company claims and third-party leases. Operation licenses were renewed and unified and now expires in 2032. Mining lease from Government of Guinea. The lease is renewable in 25-year increments. CBG’s rights are specified within the Basic Agreement and Amendment 1 to the Basic Agreement with the Government of Guinea. Mining lease granted to Ma’aden by Kingdom of Saudi Arabia Ministry of Petroleum and Mineral Resources, with a duration of 30 years. Exclusive rights to utilize bauxite and annexed minerals. Area (hectares) 702,261 227,276 7,424 293,900 14,776 (1) Owners’ Mining Rights reflects AWAC’s and/or Alcoa’s ownership interest(s) in the properties and related share (proportion) of the mineral resources and reserves and annual production. (2) For more information, see Individual Property Disclosure—Darling Range below. (3) For more information, see Individual Property Disclosure—Juruti below. (4) Brazilian mineral legislation does not limit the duration of mining concessions; rather, the concession remains in force until the deposit is exhausted. These concessions may be extended later or expire earlier than estimated, based on the rate at which these deposits are exhausted and on obtaining any additional governmental approval, as necessary. 34 Bauxite Mine Types and Facilities: Property (Region) Development Stage Type of Mine and Mineralization Darling Range(1) (WA) Production/ Operating Open-cut mines. Bauxite is lateritic formed through weathering of Archean granites and gneisses Processing Plant Other Facilities N/A Ore crushing only. Administrative buildings and workshops, crushers, long- distance conveyors. Power supplied from natural gas. Juruti(2) (Pará State) Production/ Operating Open-cut mines. Bauxite is lateritic formed through weathering of Cretaceous Alter do Chao Formation sedimentary sequence. Fixed plant for ore crushing and washing. Poços de Caldas (Minas Gerais) Production/ Operating Open-cut mines. Bauxite derived from the weathering of nepheline syenite and phonolite. N/A Run of mine (ROM) trucked to refinery stockpiles. Mine: Administrative buildings and workshops, water supply pumps and pipeline from Juruti Grande, ore stockpiles, railroad, tailings thickening and settling ponds. Port: Administrative buildings, port control, ore stockpiles, rail siding, and ship loader. Power supplied by thermoelectric units at the mine and port. Mining offices and services are located at the refinery. Power supplied by commercial grid. Boké (Sangaredi) Production/ Operating Al Ba’itha (Al Qassim) Production/ Operating Open-cut mines: The bauxite deposits within the CBG lease are of two general types. TYPE 1: In-situ laterization of Ordovician and Devonian plateau sediments locally intruded by dolerite dikes and sills. TYPE 2: Sangaredi type deposits are derived from clastic deposition of material eroded from the TYPE 1 laterite deposits and possibly some of the protoliths from the TYPE 1 plateaus deposits. Open-cut mine. Bauxite occurs as a paleolaterite profile developed at an angular unconformity between underlying late Triassic to early Cretaceous sediments (parent rock sequence Biyadh Formation) and the overlying late Cretaceous Wasia Formation (overburden sequence). N/A Ore crushed and dried at Kamsar port facilities. Mine: Administrative buildings, workshops, and water/power supply are in Sangaredi. Port: Administrative buildings, port control, ore stockpiles, ore drying facilities, rail siding, and ship loader. Power supplied by fuel oil generators at the mine and port. Fixed plant for ore crushing and train loading The mine includes fixed plants for crushing and train loading; workshops and ancillary services; power plant; and water supply. There is a company village with supporting facilities (1) For more information, see Individual Property Disclosure—Darling Range Mines below. (2) For more information, see Individual Property Disclosure—Juruti below. Bauxite Mineral Resources and Mineral Reserves In accordance with subpart 1300 of Regulation S-K, management engaged SLR International Corporation as the qualified persons to prepare technical report summaries for the disclosure of mineral resources and reserves at Darling Range and Juruti. The tables shown below of resources and reserves by mining property were prepared using the results of the procedures performed by the qualified persons, which have no affiliation with or interest in Alcoa or our mining properties. Summary of Attributable Bauxite Mineral Resources Exclusive of Mineral Reserves at December 31, 2023: Measured Indicated Measured + Indicated Inferred Alumina (%) Property Tonnage (Region) (mdmt)(1) 105.4 32.3 Darling Range (WA)(2) Juruti (Pará State)(3) 58.5 45.7 Poços de Caldas (Minas Gerais)(4) 10.6 35.2 Boké (Sangaredi)(5) 1,350.7 45.8 — 48.3 Al Ba’itha (Al Qassim)(6) (1) This table shows only the AWAC and/or Alcoa share (proportion) of mineral resources. The reference point for the mineral Tonnage (mdmt)(1) 106.9 563.6 21.4 168.1 0.7 Tonnage (mdmt)(1) 93.0 5.7 2.4 — — Tonnage (mdmt)(1) 198.4 64.2 13.1 1,350.7 — Silica (%) 1.3 4.4 5.6 2.3 — 30.6 45.3 37.4 46.6 — 30.8 45.3 37.1 46.6 — 30.4 44.5 39.0 — — Alumina (%) Alumina (%) Alumina (%) 1.4 4.5 5.5 2.3 — 1.5 5.3 4.7 — — Silica (%) Silica (%) Silica (%) 1.2 4.7 5.9 2.4 11.7 resource is the in situ predicted dry tonnage and grade of material to be delivered to the refinery stockpile following the application of mining design parameters. Metallurgical recovery factors are not applicable to the mineral resource estimate as the Darling Range operations do not include a conventional processing plant, only crushing. The metallurgical recovery of the three refineries (Kwinana, Pinjarra, and Wagerup) are beyond the boundaries of the mining operations. Certain totals may not sum due to rounding. (2) Alumina for the Darling Range is stated as Available Alumina (as A.Al2O3) and Silica is stated as Reactive Silica (as R.SiO2). Further, mineral resources are estimated using a reasonable market expectation of arms-length sales of bauxite from Darling Range, approximately $21 per ton. Darling Range mineral resources are estimated at a ≥ 27.5% A.Al2O3 and ≤3.5% R.SiO2 cut-off grade and at a minimum mining thickness of 1.5 m. (3) Alumina for Juruti is stated as Available Alumina (as A.Al2O3) and Silica is stated as Reactive Silica (as R.SiO2). Juruti mineral resources are estimated at a pit discard cut-off value based on a benefit calculation that determines whether a block is economically viable and has a minimum thickness of 1 meter (m). Further, mineral resources are estimated using a long-term bauxite price of approximately $35 (wet-base) per ton, representing a 30% increase over the mineral reserve bauxite price. 35 (4) Alumina for Poços de Caldas is stated as Available Alumina (as A.Al2O3) and Silica is stated as Reactive Silica (as R.SiO2). Poços de Caldas mineral resources are estimated at a pit discard cut-off value based on a benefit calculation that determines whether a block is economically viable. (5) Alumina for Boké is stated as Total Alumina (as T.Al2O3) and Silica is stated as Total Silica (as T.SiO2). Boké resources are estimated at a ≥ 41% T.Al2O3 and ≤10% T.SiO2 cut-off grade. Tonnage reported on a 3% moisture basis. (6) Alumina for Al Ba’itha is stated as Total Available Alumina (as TAA) and Silica is stated as Total Silica (as T.SiO2). Al Ba’itha mineral resources are estimated at a ≥ 40% TAA cut-off grade and a minimum mining thickness of 1.0 m. The following table shows only the AWAC and/or Alcoa share (proportion) of mineral reserves. These estimates are periodically updated to reflect past bauxite production, updated mine plans, new exploration information, and other geologic or mining data. Given the Company’s extensive bauxite resources, the abundant supply of bauxite globally, and the length of the Company’s rights to bauxite, it is not cost-effective to establish bauxite reserves that reflect the total size of the bauxite resources available to the Company. Certain totals may not sum due to rounding. Summary of Attributable Bauxite Mineral Reserves at December 31, 2023: Tonnage (mdmt)(1) 344.1 80.9 2.7 80.3 47.3 Tonnage (mdmt)(1) 296.0 34.7 1.8 3.8 30.9 Tonnage (mdmt)(1) 48.0 46.2 0.9 76.5 16.3 Property (Region) Proven Alumina (%) Silica (%) Probable Alumina (%) Silica (%) Total Alumina (%) Silica (%) Darling Range(2) 1.6 1.3 Juruti (Pará State)(3) 3.5 3.5 Poços de Caldas (Minas Gerais)(4) 3.4 3.8 Boké (Sangaredi)(5) 1.9 1.9 Al Ba’itha (Al Qassim)(6) 8.2 9.6 (1) This table shows only the AWAC and/or Alcoa share (proportion) of mineral reserves. The reference point for the mineral reserve is the refinery processing plant gate, with crushing, washing (as applicable), and transportation being the only process employed. Metallurgical recovery factors are not applicable to the mineral reserve estimate as the Darling Range operations do not include a conventional processing plant, only crushing. The metallurgical recovery of the three refineries (Kwinana, Pinjarra, and Wagerup) are beyond the boundaries of the mining operations. Certain totals may not sum due to rounding. 31.9 46.3 38.9 48.9 46.8 31.5 47.1 39.6 47.1 47.9 1.3 3.5 3.9 2.5 10.3 29.1 47.6 41.1 47.0 50.0 (2) Alumina for the Darling Range is stated as Available Alumina (as A.Al2O3) and Silica is stated as Reactive Silica (as R.SiO2). Darling Range mineral reserves are estimated at variable cut-off grades, dependent on operating costs and ore quality for blending to meet refinery target grades. Mineral reserves are estimated using a reasonable market expectation of arms-length sales of bauxite from Darling Range, approximately $21 per ton. (3) Alumina for Juruti is stated as Available Alumina (as A.Al2O3) and Silica is stated as Reactive Silica (as R.SiO2). Juruti mineral reserves are estimated at a pit discard cut-off value based on a benefit calculation that determines whether a block is economically viable. Further, mineral reserves are estimated using a one-year weighted average bauxite price of approximately $27 per ton, based on contractual agreements with an Alumina segment refinery. (4) Alumina for Poços de Caldas is stated as Available Alumina (as A.Al2O3) and Silica is stated as Reactive Silica (as R.SiO2). Poços de Caldas mineral reserves are estimated at a pit discard cut-off value based on a benefit calculation that determines whether a block is economically viable. (5) Alumina for Boké is stated as Total Alumina (as T.Al2O3) and Silica is stated as Total Silica (as T.SiO2). Boké reserves are estimated at a ≥ 45% T.Al2O3 and ≤10% T.SiO2 cut-off grade. Tonnage reported on a 3% moisture basis. (6) Alumina for Al Ba’itha is stated as Total Available Alumina (as TAA) and Silica is stated as Total Silica (as T.SiO2). Al Ba’itha mineral reserves are estimated at a ≥ 40% TAA cut-off grade. Individual Property Disclosure—Darling Range Property Location and Description The Darling Range bauxite deposits comprise the mining centers of (i) Huntly, located approximately 80 kilometers (km) to the southeast of Perth and 30 km northeast of Pinjarra, Western Australia, Australia, and (ii) Willowdale, located approximately 100 km south-southeast of Perth and 20 km southeast of Waroona, Western Australia, Australia. The Huntly and Willowdale mining centers/regions are separate open pit, surface mines and are both located within Mining Lease ML1SA. Darling Range is owned and operated by Alcoa through AofA. 36 All spatial data used for mineral resource and reserve estimation are reported using a local grid based on Australian Map Grid 1984 system (Zone 50) and using the Australian Geodetic Datum 1984 coordinate set. The approximate coordinates of the mining areas are 410,000 m East and 6,390,000 m North (Huntly) and 410,000 m East and 6,365,000 m North (Willowdale). 37 Darling Range Location, Lease Area, Mining Centers, and Mining Regions Refer to the Darling Range TRS in Sections 2.0 through 5.0 for more information on the Darling Range mining centers – their history, location, accessibility, and other relevant details. Infrastructure The figure above illustrates the relative location of each of the individual mining areas within the Huntly and Willowdale centers. These areas include, but are not limited to, Myara, Larego, Orion, and Arundel. Mining infrastructure in the Darling Range is generally concentrated in the Myara area in the northwest of the Huntly mining center, and at the Larego area (20 km southeast of the Wagerup refinery) in the center of the Willowdale mining center. Both infrastructure areas include: • Ore crushing and handling facilities; • Ore stockpile stacker/reclaimer; • Maintenance facilities; • Sampling stations; • Site offices including a production tracking room; • Haul road networks; • Overland conveyors, as illustrated on the above map; • Water supplies consisting of abstraction from licensed surface water sources supplemented with treated wastewater from vehicle washdowns, stormwater runoff, and maintenance workshops; and, • Power supply lines direct from certain of the Company’s refineries. Personnel are sourced from the area around Perth, Western Australia, which benefits from a skilled workforce due to the relatively large number of operating mines in the region. Huntly is accessible from the South Western Highway via Del Park Road, which connects the town of North Dandalup in the north with Dwellingup in the south. From Del Park Road, a 3 km road following the route of the bauxite conveyor to the Pinjarra refinery provides access to the Huntly site administration offices. Willowdale is similarly accessible, 19 km from the South Western Highway via Willowdale Road, a road to the south of Waroona. There are several airstrips in the region, although the closest major airport is in Perth, approximately 70 km north of North Dandalup. The nearest commercial port is at the Kwinana refinery, approximately 40 km south of Perth. While an extensive haul road network and overland conveyors transport crushed bauxite from the main mining hub to the Wagerup and Pinjarra refineries, bauxite is also transferred to the Kwinana refinery via the Kwinana freight railway system, using the Kwinana– Mundijong line. Alcoa’s Darling Range mining operations do not produce mine waste in the same manner as conventional mining operations and waste dumps are not constructed. Alcoa’s Darling Range facilities are in a well-maintained condition. Net book value of these facilities as of December 31, 2023 of $517 is included in Properties, plants, and equipment, net on the Consolidated Balance Sheet. Refer to the Darling Range TRS in Sections 14.0 and 15.0 for more information on the surface infrastructure and facilities of the Darling Range. Land Tenure and Permitting Bauxite occurrences were first recorded in the Darling Range in 1902, with studies and exploration subsequently conducted by the Geological Survey of Western Australia until the 1950s. Commercial exploration took place from 1957 by Western Mining Corporation Ltd (later Western Australia NL, or WANL), across a large portion of southwest Western Australia within a Special Mineral Lease (ML1SA) granted in 1961. Commercial mining first took place within the Darling Range in 1963 at the former Jarrahdale mining center with WANL having joined with Alcoa. The Huntly and Willowdale mines commenced commercial production in 1972 and 1984, respectively. Huntly currently supplies bauxite to the Kwinana and Pinjarra refineries (approximately 25 Mtpa), while Willowdale supplies the Wagerup refinery (approximately 10 Mtpa). 38 The ML1SA lease allows for exploration and mining of bauxite within the tenement boundaries. ML1SA was granted in 1961, by the State Government of Western Australia under the Alumina Refinery Agreement Act, 1961 (the Act 1961), for four 21-year periods, and the current lease expires on September 24, 2045. The State Government concession agreement includes the provision for conditional renewal beyond 2045. Alcoa pays rent for each square mile of ML1SA in accordance with the Act 1961, providing exclusive rights to explore for and mine bauxite on all Crown Land within the ML1SA. The current lease covers an area of 702,261 hectares (ha). There are certain annual requirements to maintain the existing permits and approvals associated with ML1SA, including: • Submission of annual mine plans for mining associated with the Wagerup refinery; • Maintain public Completion Criteria documentation for its bauxite mining operations; • Annual submission and approval of Mining and Management Programs (MMPs) that include five-year mining schedules; • Annual reporting of bauxite processed and any non-compliances to maintain environmental operational licenses; and, • Maintain compliance with environmental protection orders. The ML1SA area includes sub-lease arrangements made between Alcoa and the Worsley Alumina joint venture participants (the Worsley Participants). The agreements, made in August 2001 and September 2016, provide bauxite mining concessions to the Worsley Participants. No mineral resources or mineral reserves attributable to the Darling Range mining areas have been declared within these sub-lease areas. Constraints on mining activities within the ML1SA concession are in place, among others, which prevent mining within: 200 m of the top water level margin of any water reservoirs; Serpentine Pipehead Dam Catchment; 10 m of a Black Cockatoo nesting tree or Black Cockatoo significant tree; National Parks; Aboriginal Heritage Sites; Old Growth Forest; formal Conservation Areas; and 50 m of granite outcrop (greater than 1 ha), and Mining Avoidance Zones (MAZ) around the Western Australian forest towns of Dwellingup and Jarrahdale. Mineral resources and mineral reserves have not been defined in these restricted areas. Additionally, the 2023-2027 MMP requires additional constraints including: a reduction in mining activities inside higher risk areas within drinking water catchments; no new pit clearing in areas with an average pit slope greater than 16 percent within any Reservoir Protection Zone (RPZ, 2 km from reservoir top water level); an acceleration of forest rehabilitation and a reduction in open mining areas; and a maximum annual clearing footprint of 800 ha. Mining on a day-only basis is conducted in “noise zones” where noise from the mining operations will potentially exceed allowable levels. The operation actively seeks to maintain lower noise levels than those mandated, thus mining in these areas is undertaken by contract miners on day shifts only. The Company has all environmental permits and operating licenses required for current mining activities. Outcomes of and compliance with the management and monitoring programs are tracked within Alcoa’s Environmental Management System and reported within the Annual Environmental Review report. Refer to the Darling Range TRS in Section 3.0 for more information on Land Permitting and Tenure for the Darling Range. Geology and Exploration The Darling Range comprises a low incised plateau formed by uplift along the north-south trending Darling Fault, a major structural lineament that extends for over 250 km, from Bindoon in the north to Collie in the south. Bauxite deposits have been identified throughout the Darling Range and generally occur as erratically distributed alumina-rich lenses. Lateralization and subsequent periodic activity of the Darling Fault has resulted in the current landform of scarps and deeply incised valleys on the western edge of the Darling Range. Systematic exploration for bauxite within the region commenced in the 1960s and is currently conducted on a continuous basis to maintain sufficient mineral resources and mineral reserves to meet refinery supply. Current mine plans include further exploration throughout all areas where Alcoa has mining permits to sustain future production. Refer to the Darling Range TRS in Sections 6.0 through 11.0 for more information on the geology, mineralization, and exploration history of the Darling Range, including Quality Assurance / Quality Control (QA/QC) procedures and data used in the current mineral resource estimate. Mining and Processing The Huntly and Willowdale mines employ conventional open pit surface mining practices and equipment. Following definition of mineral reserve blocks, vegetation is cleared after which Alcoa operations commence stripping topsoil and secondary overburden removal using small excavators, scrapers, and trucks. Soil is stockpiled at the site, away from the proposed pit, for rehabilitation 39 purposes. After completion of mining, overburden is progressively backfilled into adjacent exhausted pits, topsoiled, and rehabilitated by re-establishment of native vegetation, creating a stable post-mining landform that replicates the pre-existing environment. The process plant for the Darling Range operations consists of two separate crushing facilities at the Huntly and Willowdale mines, respectively. Both facilities crush the ROM ore and convey the crushed ore to three separate refineries located at Pinjarra, Kwinana, and Wagerup. The Pinjarra refinery is located adjacent to the east of the town of Pinjarra and is approximately 30 km southwest of the Huntly mining areas. The Kwinana refinery, also supplied by Huntly, is approximately 50 km northwest of Huntly in the city of Kwinana, approximately 40 km south of Perth. The Wagerup refinery, supplied by Willowdale, is located immediately adjacent to the east of the South Western Highway, approximately 8 km south of Waroona and 20 km west of the Willowdale mining area. The process plant is a dry crushing operation and therefore water is not required as a consumable for the plant. Alcoa’s Darling Range mining operations do not produce mine waste in the same manner as conventional mining operations and waste dumps are not constructed. Refer to the Darling Range TRS in Sections 12.0 and 13.0 for a detailed description of the mineral reserves and mining methods used in the Darling Range. Environmental and Social Alcoa’s mine sites are monitored in accordance with the conditions of Government authorizations and its operational licenses at Huntly and Willowdale. Outcomes of and compliance with the management and monitoring programs are tracked within Alcoa’s Environmental Management System and reported within a Triennial Environmental Review report. Alcoa works proactively with key regulatory agencies to address operational incidents and implement operational improvements to reduce releases to the environment. In December 2023, the Western Australian government granted a section 6 exemption under the Environmental Protection Act 1986 that allows Alcoa to continue its mining operations while the WA Environmental Protection Authority (EPA) assesses the environmental impact of parts of the MMP, following a third party’s referral of the Company’s future and existing mine plans in existing mine regions to the WA EPA in the first quarter of 2023. Compliance against the section 6 exemption is monitored on a weekly basis by an independent compliance monitor and reported monthly to the Department of Water and Environmental Regulation. At the request of the Western Australian government, the Company has committed to provide a bank guarantee for approximately $68 (A$100) demonstrating Alcoa’s confidence that its operations will not impair drinking water supplies. Alcoa is modernizing its environmental approvals framework for the Huntly bauxite mine and referred future mining plans to access Myara North and Holyoake to the WA EPA for assessment in 2020. Refer to the Darling Range TRS in Section 17.0 for more information on the environmental, social, compliance, and permitting aspects of the Darling Range. Mineral Resources and Mineral Reserves In January 2024, Alcoa announced the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. Current mine plans do not accommodate this curtailment but will be amended to include a staged reduction of supply to the refinery through the third quarter of 2024. For information on Darling Range mineral resources and mineral reserves, refer to the tables above. For comparative purposes, measured and indicated mineral resources were 198.4 mdmt and 96.7 mdmt as of December 31, 2023 and 2022, respectively, representing an increase of 105 percent. Inferred mineral resources were 106.9 mdmt and 140.3 mdmt as of December 31, 2023 and 2022, respectively, representing a decrease of 24 percent. Probable reserves were 296.0 mdmt and 255.8 mdmt as of December 31, 2023 and 2022, respectively, representing an increase of 16 percent, and proven reserves were 48.0 mdmt and 145.8 mdmt as of December 31, 2023 and 2022, respectively, representing a decrease of 67 percent. The increase in measured and indicated mineral resources from December 31, 2022 to December 31, 2023 is primarily attributable to the addition of lower grade material in Larego and Myara, exploration activities and changes in mine scheduling. The decrease in inferred mineral resources from December 31, 2022 to December 31, 2023 is attributable to Alcoa’s commitments to refrain from mining in areas within the MAZ around Dwellingup. The mineral reserves decrease from December 31, 2022 to December 31, 2023 is attributable to mining depletion in 2023, changes in mine scheduling, the depletion of ore in higher risk areas within drinking water catchments and Reservoir Protection Zones in Myara, and adjustment of the cut-off grades in Myara and parts of Larego. Additionally, refer to the Darling Range TRS Section 17.1 for more information on the mineral resources and mineral reserves of the Darling Range mines. 40 Individual Property Disclosure—Juruti Property Location and Description The Juruti bauxite mine is located in the west of Para State in northern Brazil. The mine is approximately 55 km south from the town of Juruti on the southern shore of the Amazon River. The mine is owned and operated by Alcoa through AWAB. The Juruti bauxite mine represents an established mining operation which commenced commercial production of bauxite in 2009. All spatial data used for the mineral resource and mineral reserve estimation are reported using a local grid based on SIRGAS 2000 (21S). The approximate coordinates of the mining area for the Capiranga Central, Mauari, São Francisco, Mutum and Santarém plateaus are 618,879 m East and 9,721,768 m North, and for the Nhamundá plateau are 521,657 m East and 9,773,299 m North. Juruti Location and Bauxite Mine Permit Areas Refer to the Juruti TRS in Sections 2.0 through 5.0 for more information on the Juruti mine – history, location, accessibility, and other relevant details. Infrastructure Infrastructure required for bauxite mining operations is well-established and available, the majority of which is located within the area of the Juruti bauxite mine. The required infrastructure includes the following: • Rail siding and loading equipment; • Bauxite beneficiation plant for ore crushing and washing; • Mine waste facilities including tailings thickening lagoons and tailings disposal ponds; • ROM and product stockpiles and materials handling conveyors; • Ancillary buildings (offices, warehouses, laboratory, workshops); • Fuel station; • Water supply intake raft, pumps, and approximate 9 km pipeline from the Juruti Grande stream; • Power generation via thermoelectric units at the mine and port; • Surface water management including drainage channels and pumps; • Off-site rail corridor between the mine and port; and, • Port facilities including rail siding, material handling equipment, ship loader. 41 The Juruti mining area is connected to Juruti town and port facilities by a road that joins to the PA-257 road near the town, and a dedicated railway between the mining area and port. There are very few major roads across the region and the only major road in this area is the PA-257. The nearest major city to Juruti is Santarem, approximately 160 km to the east and is only accessible by boat or by air from Juruti Airport (JRT) to Santarem-Maestro Wilson Fonseca Airport (STM). National roads connect Santarem to wider Para State including the port city of Belem on Brazil’s northern coast, approximately 1,300 km by road via the 230 and PA-151 roads. Juruti began production in 2009 and the facilities are in a well-maintained condition. Net book value of these facilities as of December 31, 2023 of $512 is included in Properties, plants, and equipment, net on the Consolidated Balance Sheet. Refer to the Juruti TRS in Sections 14.0 and 15.0 for more information on the surface infrastructure and facilities of the Juruti mine. Land Tenure and Permitting All exploration and mining activities are managed by the National Mining Agency, Agencia Nacional de Mineracao (ANM), under the Mining Code (1967). Permits are granted by the ANM and fall into two categories: • Exploration Permits: granted to support ongoing exploration activities. On submittal of an approved Exploration Report, the holder is then granted one year to present a Mining Plan as a precursor to obtaining a Mining Concession. Exploration Permits require: o Initial application fee and submission by a registered professional geologist or mining engineer; o Annual fee payment to the ANM; o Declaration of exploration expenditures on an annual basis; and, oSurvey visit fee payment to the ANM. • Mining Concession: following a successful Mining Plan submission, enabling exploitation once Environmental Licenses are granted. Concession holders are required to: o Commence mining activities within 6 months of being granted; o Submit annual reports on all mining / processing activities (Relatorio Annual de Lavra, or RAL) to the ANM; o Make compensation payments to landowners in line with the agreements made for mining easement; and, o Make Brazilian Mineral Royalty payments (Compensacao Financeira pela Exploracao de Recursos Minerais, or CFEM). At Juruti there are three continuous mining concessions for an aggregated 29,410 ha, where current mineral reserves are determined. Brazilian mineral legislation does not limit the duration of mining concessions and instead the concession remains in force until the deposit is exhausted. These concessions may be extended later or expire earlier than estimated, based on the rate at which the deposits are exhausted and on obtaining any additional governmental approval, as necessary, such as operational licenses and environmental approvals. In addition to the mining rights, there are thirteen requests for mining concessions, fourteen exploration permits, and two requests for exploration permits. The aggregated area for these permits is 197,866 ha. The mining operations at Juruti take place on third-party land and, in accordance with the Mining Concession requirements, Alcoa currently has agreements in place with respective landowners. Agreements form a “mining easement,” which grants Alcoa access to the mining areas in exchange for compensation payments. As a result, there are no other titles, claims, leases, or options applicable to the exploration or mining permit areas which may limit Alcoa’s rights. Similarly, there are no liens or encumbrances. The Company has all environmental permits and operating licenses required for current mining activities; there are no liens or encumbrances. Refer to the Juruti TRS in Sections 3.0 and 17.0 for more information on Land Permitting and Tenure for the Juruti mine. Geology and Exploration The bauxite deposit of the Juruti bauxite mine consist of several lateritic bauxite plateaus which exist over a large lateral extent (several km) in comparison to the total thickness of the deposit (typically up to 20 m below surface). Systematic exploration for bauxite within the region has persisted since Alcoa’s ownership and is currently conducted on a continuous basis to establish optimal mine plans to achieve a uniform quality of bauxite production. Current mine plans include further exploration throughout all areas where Alcoa has mining permits to sustain future production. Refer to the Juruti TRS in Sections 6.0 through 11.0 for more information on the geology, mineralization, and exploration history of the Juruti mine, including QA/QC procedures and data used in the current mineral resource estimate. 42 Mining and Processing Juruti is an active mining operation using surface strip mining methods over a total of eight plateaus whereby land clearance, topsoil removal, and overburden stripping is followed by bauxite deposit excavation and stockpiling. Waste is subsequently backfilled, and overburden and topsoil are re-instated for surface rehabilitation. Juruti produces both a washed and unwashed bauxite product; however, all tonnage is presented on a zero-moisture basis. Bauxite processing takes place at a dedicated plant facility located at the Juruti mine site which has been operating since 2009 and comprises a simple comminution (crushing, screening) and washing circuit designed to remove fine particles from the ore. Fine materials removed from ore are deposited in a thickening pond for settling and water reclamation, after which solid tailings are discarded into separate tailings ponds. There is currently one thickening pond and seven disposal ponds. Refer to the Juruti TRS in Sections 12.0 and 13.0 for a detailed description of the mineral reserves and mining methods used in the Juruti mine. Environmental and Social Alcoa submits an Annual Environmental Report in compliance with the Juruti operating licenses and approvals. This report includes detailed descriptions of activities undertaken for the year and environmental and social monitoring. No significant compliance issues were identified in the 2021/2022 and 2022/2023 Annual Environmental Reports, although certain environmental incidents were recorded in December 2020 and February 2021 which involved siltation of downstream watercourses following extreme rainfall events. In addition, during 2023, Alcoa reported to the state environmental agency that the volume of ore shipped from the port exceeded the permitted volume at times over the last three years. This issue was resolved in January 2024 when the agency amended the operating permit for the port to allow up to 12 Mtpa of ore to be shipped. Additionally, Alcoa works proactively with key regulatory agencies to address operational non-compliances and implement operational improvements to reduce releases to the environment. None of the reportable non-compliances represent a risk that could adversely affect its license to operate. Refer to the Juruti TRS in Section 17.0 for more information on the environmental, social, compliance, and permitting aspects of the Juruti mine. Mineral Resources and Mineral Reserves For information on Juruti mineral resources and mineral reserves, refer to the tables above. For comparative purposes, measured and indicated mineral resources of 64.2 mdmt did not change from 2022. Inferred mineral resources were 563.6 mdmt and 563.7 mdmt as of December 31,2023 and 2022, respectively, representing a marginal decrease of 0.1 percent. Proven reserves were 46.2 mdmt and 48.6 mdmt as of December 31,2023 and 2022, respectively, representing a decrease of 5 percent. Probable reserves were 34.7 mdmt and 36.8 mdmt as of December 31,2023 and 2022, respectively, representing a decrease of 6 percent. Mineral resources were consistent with 2022. The decrease in mineral reserves from December 31, 2022 reflects mining depletion during 2023. Refer to the Juruti TRS for more information on the mineral resources and mineral reserves of the Juruti mine. Internal Controls Alcoa has a long history of mining bauxite, with the majority of bauxite production having been used to supply Alcoa refineries. Internal controls used by the Company are informed by internal reviews, representation on Technical Committees of Joint Venture operations, and by reviews, audits, and studies performed by third-party mining consultants. The controls include: surveying of drillhole collar locations, drill sample logging, collection and security, database verification and security, QA/QC programs, internal and third-party qualified person statistical analysis, internal and third-party qualified person model validation, and reconciliation. Modelling and analysis of the Company’s resources is completed internally and reviewed by a qualified person, with the exception of Al Ba’itha where modelling and analysis is completed by a third-party consultant. As the ore bodies are shallow and generally horizontal, two-dimensional seam modelling has been the standard practice; however, many operations are implementing more conventional 3D block modelling using geostatistical interpolation methods. Mineral resource estimation is validated internally through visual comparison of drillholes and model blocks as well as through the use of swath plots and statistical distributions. Mineral resource estimation is reviewed and adopted by a qualified person. Mineral reserve estimation is completed internally and reviewed by a qualified person, with the exception of Boké and Al Ba’itha where reserve estimation is completed by a third-party consultant. 43 Labelled samples from the drill site are securely transported for logging or temporary storage by the drilling contractor or Alcoa personnel. Additional transport to internal or external laboratories is controlled and completed, as necessary, by Alcoa personnel or by courier. Drillhole databases are all site specific; most sites use industry standard drillhole database software, applications, and processes with security and backup protocols in place. Prior to modelling, secondary validation and cleansing of the modelling datasets is performed. Wherever possible, data collection is digital to allow direct loading into the database. The Company has well-established QA/QC programs that are site specific. Although some programs are limited to laboratory protocols only covering analysis of duplicate pulps and standards, others involve, to varying degrees, the range of activities from twin hole drilling and collection of field duplicates, submission of blind duplicates and standards and submission of duplicate samples to umpire laboratories. Regardless of the level of QA/QC, all sites have well established and documented sampling and analysis regimes. QA/QC practices and available data are reviewed by a qualified person. As discussed above, management relies on estimates for our mineral reserves and these estimates could change due to a number of factors, including future changes in: permitting requirements, geological conditions, ongoing mine planning, macroeconomic and industry conditions, and regulatory disclosure requirements. See Part I Item 1A of this Form 10-K for more information on risks. Item 3. Legal Proceedings. In the ordinary course of its business, Alcoa is involved in a number of lawsuits and claims, both actual and potential. Proceedings that were previously disclosed may no longer be reported because, as a result of rulings in the case, settlements, changes in our business, or other developments, in our judgment, they are no longer material to Alcoa’s business, financial position or results of operations. See Part II Item 8 of this Form 10-K in Note S to the Consolidated Financial Statements for additional information. In addition to the matters discussed below, various other lawsuits, claims, and proceedings have been or may be instituted or asserted against Alcoa Corporation, including those pertaining to environmental, safety and health, commercial, tax, product liability, intellectual property infringement, employment, employee and retiree benefit matters, and other actions and claims arising out of the normal course of business. While the amounts claimed in these other matters may be substantial, the ultimate liability is not readily determinable because of the considerable uncertainties that exist. Accordingly, it is possible that the Company’s liquidity or results of operations in a particular period could be materially affected by one or more of these other matters. However, based on facts currently available, management believes that the disposition of these other matters that are pending or asserted will not have a material adverse effect, individually or in the aggregate, on the financial position of the Company. St. Croix Proceedings - Abednego and Abraham cases. In January 2010, ParentCo was served with a multi-plaintiff action complaint involving several thousand individual persons claiming to be residents of St. Croix alleging personal injury or property damage from Hurricane Georges or winds blowing material from the St. Croix Alumina, L.L.C. (SCA) facility on the island of St. Croix (U.S. Virgin Islands). This complaint, Abednego, et al. v. Alcoa, et al., which added the then current owners of the facility to a February 1999 action, was filed in the Superior Court of the Virgin Islands, St. Croix Division. In 2012, ParentCo was served with a separate multi-plaintiff action alleging claims essentially identical to those set forth in the Abednego v. Alcoa complaint. In 2015, the Superior Court dismissed all plaintiffs’ complaints without prejudice, permitting the plaintiffs to re-file the complaints individually. In 2017, the court issued an order that consolidated all timely complaints into the Red Dust Claims docket (Master Case No.: SX-15-CV-620). Following this order, a total of approximately 430 complaints were filed and accepted by the court, which included claims of approximately 1,360 individuals. In November 2018, the Red Dust Claims docket was transferred to the Complex Litigation Division within the Superior Court of the Virgin Islands. At such time, the Company was unable to reasonably predict an outcome or to estimate a range of reasonably possible loss, and thereafter the Red Dust Claims docket became inactive for several years. The Court issued an amended case management order dividing the complaints filed in the Red Dust docket into groups of 50 complaints, designated Groups A though I in March 2022. The parties selected 10 complaints from Group A to proceed to trial as the Group A lead cases. In November 2023, the Court issued an amended case management order with regard to the Group A lead cases scheduling trials to begin in July 2024. Trials with regard to the Group A lead cases will continue through March 2025. Concurrently, the Court is considering discovery issues with respect to other group cases. The Company remains unable to reasonably predict an outcome or to estimate the range of reasonably possible loss in the Red Dust Claims docket cases. 44 Environmental Matters SEC regulations require disclosure of certain environmental matters when a governmental authority is a party to the proceedings and such proceedings involve potential monetary sanctions that the Company reasonably believes will exceed a specified threshold. Pursuant to these regulations, the Company uses a threshold of $1 for purposes of determining whether disclosure of any such proceedings is required. Alcoa is involved in proceedings under CERCLA and analogous state or other statutory or jurisdictional provisions regarding the usage, disposal, storage, or treatment of hazardous substances at a number of sites. The Company has committed to participate, or is engaged in negotiations with authorities relative to its alleged liability for participation, in clean-up efforts at several such sites. The most significant of these matters are discussed in Part II Item 8 of this Form 10-K in Note S to the Consolidated Financial Statements under the caption Contingencies. Intalco (Washington) Notice of Violation—In May 2022, the Company received a Notice of Violation (NOV) from the U.S. Environmental Protection Agency (the EPA). The NOV alleges violations under the Clean Air Act at the Company’s curtailed Intalco (Washington) smelter from when the smelter was operational. The EPA has referred the matter to the U.S. Department of Justice, Environment and Natural Resources Division (the DOJ). The DOJ and the Company are engaged in discussions with respect to a resolution of this matter. Asbestos Litigation Some of our subsidiaries as premises owners are defendants in active lawsuits filed in various jurisdictions on behalf of persons seeking damages for alleged personal injury as a result of occupational exposure to asbestos at various facilities. Our subsidiaries and acquired companies all have had numerous insurance policies over the years that provide coverage for asbestos based claims. Many of these policies provide layers of coverage for varying periods of time and for varying locations. We have significant insurance coverage and believe that our reserves are adequate for known asbestos exposure related liabilities. The costs of defense and settlement have not been and are not expected to be material to the results of operations, cash flows, and financial position of Alcoa Corporation. Item 4. Mine Safety Disclosures. Not applicable. 45 PART II Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities. Shares of the Company’s common stock are listed on the New York Stock Exchange and trade under the symbol “AA.” On October 14, 2021, Alcoa Corporation announced the initiation of a quarterly cash dividend program and the Board of Directors declared the first quarterly cash dividend of $0.10 per share of the Company’s common stock, which was paid during the fourth quarter of 2021. Alcoa Corporation paid quarterly cash dividends of $0.10 per share in 2022 and 2023. Dividends on Alcoa Corporation common stock are subject to authorization by the Company’s Board of Directors. The Company intends to pay cash dividends on a quarterly basis; however, the payment, amount, and timing of dividends, if any, depends upon matters deemed relevant by the Company’s Board of Directors, such as Alcoa Corporation’s financial position, results of operations, cash flows, capital requirements, business condition, future prospects, any limitations imposed by law, credit agreements or senior securities, and other factors deemed relevant and appropriate. See Part II Item 7 of this Form 10-K in Management’s Discussion and Analysis of Financial Condition and Results of Operations under caption Liquidity and Capital Resources – Financing Activities for more information. As of February 16, 2024, there were approximately 7,600 holders of record of shares of the Company’s common stock. Because many of Alcoa Corporation’s shares are held by brokers and other institutions on behalf of stockholders, the Company is unable to estimate the total number of stockholders represented by these holders. Stock Performance Graph The following graph compares Alcoa Corporation’s cumulative total stockholder return (i.e., stock price change plus reinvestment of dividends) with the cumulative total stockholder returns of (1) the S&P Metals & Mining Select Industry Index, and (2) the S&P MidCap 400® Index. This comparison was based on an initial investment of $100, including the reinvestment of any dividends, on December 31, 2018 through December 31, 2023. The stock performance information included in this graph is based on historical results and is not necessarily indicative of future stock price performance. December 31, Alcoa Corporation S&P Metals & Mining Select Industry Index S&P MidCap 400 Index $ 2018 2019 2020 2021 2022 2023 $ 100 100 100 $ 81 115 126 $ 87 134 143 $ 225 181 179 $ 173 206 156 131 251 181 46 Issuer Purchases of Equity Securities Fourth Quarter 2023 October 1 to October 31 November 1 to November 30 December 1 to December 31 Total Total Number of Shares Purchased Weighted Average Price Paid Per Share — $ — — — — — — — Total Number of Shares Purchased as Part of Publicly Announced Program Approximate Dollar Value of Shares that May Yet be Purchased Under the Program(1) — $ — — — 500,000,000 500,000,000 500,000,000 (1) On July 20, 2022, Alcoa Corporation announced that its Board of Directors approved a common stock repurchase program under which the Company may purchase shares of its outstanding common stock up to an aggregate transactional value of $500, depending on the Company’s continuing analysis of market, financial, and other factors (the July 2022 authorization). As of the date of this report, the Company is currently authorized to repurchase up to a total of $500, in the aggregate, of its outstanding shares of common stock under the July 2022 authorization. Repurchases under this program may be made using a variety of methods, which may include open market purchases, privately negotiated transactions, or pursuant to a Rule 10b5-1 plan. This program may be suspended or discontinued at any time and does not have a predetermined expiration date. Alcoa Corporation intends to retire repurchased shares of common stock. Item 6. [RESERVED] 47 Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations. (dollars in millions, except per-share amounts, average realized prices, and average cost amounts; dry metric tons in millions (mdmt); metric tons in thousands (kmt)) Forward-Looking Statements This report contains statements that relate to future events and expectations and as such constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include those containing such words as “aims,” “ambition,” “anticipates,” “believes,” “could,” “develop,” “endeavors,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “outlook,” “potential,” “plans,” “projects,” “reach,” “seeks,” “sees,” “should,” “strive,” “targets,” “will,” “working,” “would,” or other words of similar meaning. All statements by Alcoa Corporation that reflect expectations, assumptions or projections about the future, other than statements of historical fact, are forward-looking statements, including, without limitation, forecasts concerning global demand growth for bauxite, alumina, and aluminum, and supply/demand balances; statements, projections or forecasts of future or targeted financial results, or operating performance (including our ability to execute on strategies related to environmental, social and governance matters); statements about strategies, outlook, and business and financial prospects; and statements about capital allocation and return of capital. These statements reflect beliefs and assumptions that are based on Alcoa Corporation’s perception of historical trends, current conditions, and expected future developments, as well as other factors that management believes are appropriate in the circumstances. Forward-looking statements are not guarantees of future performance and are subject to known and unknown risks, uncertainties, and changes in circumstances that are difficult to predict. Although Alcoa Corporation believes that the expectations reflected in any forward-looking statements are based on reasonable assumptions, it can give no assurance that these expectations will be attained and it is possible that actual results may differ materially from those indicated by these forward-looking statements due to a variety of risks and uncertainties. Such risks and uncertainties include, but are not limited to: (a) the impact of global economic conditions on the aluminum industry and aluminum end-use markets; (b) volatility and declines in aluminum and alumina demand and pricing, including global, regional, and product-specific prices, or significant changes in production costs which are linked to LME or other commodities; (c) the disruption of market-driven balancing of global aluminum supply and demand by non-market forces; (d) competitive and complex conditions in global markets; (e) our ability to obtain, maintain, or renew permits or approvals necessary for our mining operations; (f) rising energy costs and interruptions or uncertainty in energy supplies; (g) unfavorable changes in the cost, quality, or availability of raw materials or other key inputs, or by disruptions in the supply chain; (h) our ability to execute on our strategy to be a lower cost, competitive, and integrated aluminum production business and to realize the anticipated benefits from announced plans, programs, initiatives relating to our portfolio, capital investments, and developing technologies; (i) our ability to integrate and achieve intended results from joint ventures, other strategic alliances, and strategic business transactions; (j) economic, political, and social conditions, including the impact of trade policies and adverse industry publicity; (k) fluctuations in foreign currency exchange rates and interest rates, inflation and other economic factors in the countries in which we operate; (l) changes in tax laws or exposure to additional tax liabilities; (m) global competition within and beyond the aluminum industry; (n) our ability to obtain or maintain adequate insurance coverage; (o) disruptions in the global economy caused by ongoing regional conflicts; (p) legal proceedings, investigations, or changes in foreign and/or U.S. federal, state, or local laws, regulations, or policies; (q) climate change, climate change legislation or regulations, and efforts to reduce emissions and build operational resilience to extreme weather conditions; (r) our ability to achieve our strategies or expectations relating to environmental, social, and governance considerations; (s) claims, costs, and liabilities related to health, safety and environmental laws, regulations, and other requirements in the jurisdictions in which we operate; (t) liabilities resulting from impoundment structures, which could impact the environment or cause exposure to hazardous substances or other damage; (u) our ability to fund capital expenditures; (v) deterioration in our credit profile or increases in interest rates; (w) restrictions on our current and future operations due to our indebtedness; (x) our ability to continue to return capital to our stockholders through the payment of cash dividends and/or the repurchase of our common stock; (y) cyber attacks, security breaches, system failures, software or application vulnerabilities, or other cyber incidents; (z) labor market conditions, union disputes and other employee relations issues; (aa) a decline in the liability discount rate or lower-than-expected investment returns on pension assets; and (bb) the other risk factors discussed in Part 1 Item 1A of this Form 10-K and other reports filed by Alcoa Corporation with the SEC, including those described in this report. We caution readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date they are made. Alcoa Corporation disclaims any obligation to update publicly any forward-looking statements, whether in response to new information, future events or otherwise, except as required by applicable law. Market projections are subject to the risks described above and other risks in the market. 48 Overview Our Business Alcoa Corporation (Alcoa or the Company) is a vertically integrated aluminum company comprised of bauxite mining, alumina refining, aluminum production (smelting and casting), and energy generation. Aluminum is a commodity that is traded on the London Metal Exchange (LME) and priced daily. Additionally, alumina is subject to market pricing through the Alumina Price Index (API), which is calculated by the Company based on the weighted average of a prior month’s daily spot prices published by the following three indices: CRU Metallurgical Grade Alumina Price, Platts Metals Daily Alumina PAX Price, and FastMarkets Metal Bulletin Non-Ferrous Metals Alumina Index. As a result, the price of both aluminum and alumina is subject to significant volatility and, therefore, influences the operating results of Alcoa Corporation. Through direct and indirect ownership, Alcoa Corporation has 27 operating locations in nine countries around the world, situated primarily in Australia, Brazil, Canada, Iceland, Norway, Spain, and the United States. Governmental policies, laws and regulations, and other economic factors, including inflation and fluctuations in foreign currency exchange rates and interest rates, affect the results of operations in these countries. Business Update During 2023, average alumina and aluminum prices decreased by 6% and 17% respectively, and the cost for energy and raw materials, including carbon products, caustic soda, and other key inputs decreased. The lower costs for energy and raw materials reflect a decline from the elevated costs in 2022, which were driven by regional conflicts, inflation pressures and multiple supply chain disruptions. Despite the alumina and aluminum pricing challenges, Alcoa made progress on its key objectives during 2023. In December 2023, the Company received mine plan approvals from the Western Australian government for its Huntly and Willowdale bauxite mines, delivering on a near-term objective for the Company. The approvals allow the Company to continue bauxite mining and downstream alumina refining in Western Australia, while enhancing the way it operates to meet evolving requirements and expectations. Due to its production of commercial grade aluminum, in December 2023, the Company qualified for Section 45X of the Advanced Manufacturing Tax Credit, enacted as part of the Inflation Reduction Act, which improves the profitability of its smelters in the U.S. The Company has also requested revisions to the December 2023 regulations to allow for the inclusion of materials costs in the credit calculation. During 2023, the Company continued the controlled pace for the restart of the Alumar smelter in São Luís, Brazil and improved the operating stability of restarted pots. The Company also improved operational stability across the portfolio, while achieving annual and fourth quarter production records at four smelters in Canada and Norway. During 2023, the Company targeted improvement of financial results for certain operations. The first announced action was initiated at the Kwinana refinery in the third quarter of 2023, to mitigate the financial impacts of lower bauxite grade and to optimize current operating levels. Further analysis in 2023 also led to the decision in early 2024 to fully curtail the Kwinana refinery by mid-2024. Also, in December 2023, Alcoa began engagement with government stakeholders and workers’ representatives of the San Ciprián refinery and smelter regarding the sustained and ongoing financial losses in order to find a long-term solution for the combined operations. In addition to the actions the Company has taken to date, it has identified additional opportunities to improve profitability in both the near term and medium term, as well as market opportunities with improved alumina and aluminum pricing. Near term opportunities include savings in 2024 for key raw materials - caustic soda and lime for refining and anode carbon products for smelting – realizable due to favorable contractual negotiations and market pricing, as well as inventory lags. Additionally, in January 2024, the Company announced a productivity and competitiveness program aimed at reducing controllable operating costs across the organization (excluding raw materials, energy, and transportation). Near term opportunities also include expected savings from the Warrick smelter optimization, the Alumar smelter restart completion, and the Kwinana refinery curtailment. Medium term opportunities are beyond 2024 and 2025 and include the benefit of better bauxite grades in Western Australia and a fully optimized Alumar refinery. In 2019, the Company announced a five-year strategic portfolio review of its smelting and refining capacity to improve cost positioning or curtail, close, or divest 1.5 million and 4 million metric tons of smelting and refining capacity, respectively. Through January 2024, Alcoa continued to make progress on the portfolio review completing its review of refining capacity and reaching approximately 93 percent of its target for smelting capacity. 49 Despite a challenging market during 2023, the Company began to see evidence of stabilizing demand in the fourth quarter of 2023. Alcoa saw a significant increase in year-over-year demand for its EcoLum aluminum in 2023, which is part of our Sustana brand, through both increased margins and deliveries while still a relatively small portion of the Company’s overall sales volume. The year- over-year volume increase for EcoLum, which is aluminum produced with no more than 4.0 metric tons of carbon dioxide equivalents per metric ton of aluminum produced, was driven mostly by the European market. While the industry is seeing challenges in the short-term, the Company continues to project strong long-term demand for aluminum, as global decarbonization goals and renewable energy scarcity are expected to positively influence the aluminum industry’s demand and supply fundamentals. Due to renewable energy sources and low carbon dioxide intensity in our operations, Alcoa believes that it is well positioned as a supplier of choice, especially in a world that is working to further reduce greenhouse gas emissions. Australia Mine Plan Approvals The Company seeks annual approvals from the Western Australian State Government for its rolling five-year mine plans to maintain continued operations at the Huntly and Willowdale bauxite mines. In December 2023, the Western Australian government approved Alcoa’s latest five-year mine plan – known as the 2023-2027 Mining and Management Program (MMP) – for its Huntly and Willowdale bauxite mines that will allow the Company to continue bauxite mining and downstream alumina refining in Western Australia. Alcoa is subject to a range of stringent conditions addressing key environmental factors that includes enhanced protections for drinking water, including increased distances from reservoirs, and biodiversity along with accelerated forest rehabilitation. The accelerated forest rehabilitation will require an acceleration of cash spend of approximately $40 over the next three and half years from asset retirement obligations already recorded. In addition, the Western Australian government granted an exemption that allows Alcoa to continue its mining operations while the Western Australian Environmental Protection Authority (WA EPA) assesses the environmental impact of parts of the MMP, following a third party’s referral of the Company’s future and existing mine plans in existing mine regions to the WA EPA in the first quarter of 2023. At the request of the Western Australian government, the Company has committed to provide a bank guarantee for approximately $68 (A$100) demonstrating Alcoa’s confidence that its operations will not impair drinking water supplies. In the second quarter of 2023, Alcoa began mining lower grade bauxite in areas at the Huntly mine as it continued to work through the annual mine approvals process. The reduction in grade increased the use of caustic, energy, and bauxite, and decreased alumina output. Separately, Alcoa has committed to continuing to work with the Western Australian government to modernize the approvals framework for its two bauxite mines and three alumina refineries in the state. This includes transitioning all proposed new major mining regions to the more contemporary EPA assessment and approvals process. Alcoa started this process in 2020, when it referred its next two proposed mine regions (Myara North and Holyoake) for WA EPA assessment. The Company expects the bauxite quality at Myara North and Holyoake to be more consistent with the historic higher quality at the existing Myara Central. Alcoa continues to work to secure approvals for these new regions and anticipates mining in the new regions no earlier than 2027. Until then, the Company expects bauxite quality similar to recent grades. San Ciprián Operations The San Ciprián smelter was curtailed in January 2022, as a result of an agreement with the workers’ representatives in December 2021. In February 2023, under the terms of an amended viability agreement, Alcoa agreed to a phased restart of the smelter beginning in January 2024, to operate an initial complement of approximately 6 percent of total pots, to restart all pots by October 1, 2025 and to maintain 75 percent of the annual capacity of 228 kmt from October 1, 2025 until the end of 2026. Long-term economic viability of any ramp up beyond the initial 6 percent of total pots will depend upon the availability of affordable power, which currently does not exist in adequate supply. While the Company has met its commitments to enter into power purchase agreements for the necessary capacity, that capacity has not been fully permitted by the government or built by the power provider, putting an on-time restart at significant risk and causing the smelter to incur substantial operating losses for longer, all of which is rendering the smelter economically unviable. At the refinery, operating losses continue despite the mitigating action taken by the Company in the third quarter of 2022 to curtail capacity to 50 percent. 50 Since the smelter curtailed in January 2022, the Company has honored its commitments under the viability agreements signed in December 2021 and February 2023, including paying all employees, making capital investments, and restarting pots in 2024. However, current market conditions, including the cost for available energy, do not support an economically viable restart. Further, permitting and development of renewable energy projects, which were a critical component of the restart, have been delayed. The refinery and smelter incurred significant losses in 2023 and prior years which have been funded with internal credit lines that are now nearing their limits, and which the operations have no ability to repay. Based on current economic conditions, the San Ciprián operations are expected to incur substantial losses in 2024 and Alcoa anticipates that available funding will be exhausted in the second half of 2024. As a result of the extended duration of the adverse economic environment, in December 2023, Alcoa began engagement with government stakeholders and workers’ representatives of the San Ciprián refinery and smelter regarding the sustained and ongoing financial losses in order to find a long-term solution for the combined operations. Alcoa is seeking flexibility and support from Spanish stakeholders to identify all potential forms of relief and to work collaboratively on a long-term solution. If stakeholder discussions do not secure the long-term economic viability of the operations, it is expected that available funding will be exhausted in the second half of 2024 and difficult decisions will have to be considered regarding the future of the San Ciprián complex. Productivity and Competitiveness Program In January 2024, the Company initiated a productivity and competitiveness program across its global operations and functions. The program is a first step in the Company’s objective and includes a target to save approximately 5 percent of operating costs, exclusive of raw materials, energy, and transportation costs which are already under active management and cost control programs. Total savings are expected to approximate $100 on a run rate basis and to be achieved by the first quarter of 2025. Other Portfolio Actions Kwinana refinery—On January 8, 2024, Alcoa announced the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. The refinery has an annual nameplate capacity of 2.2 million metric tons and has been operating at approximately 80 percent of its nameplate capacity since January 2023, when the Company reduced production in response to a domestic natural gas shortage in Western Australia due to production challenges experienced by key gas suppliers. The Company’s decision to fully curtail the refinery was made based on a variety of factors, including the refinery’s age, scale, operating costs, and current bauxite grades, in addition to current market conditions. The refinery currently has approximately 800 employees and this number will be reduced to approximately 250 in the third quarter of 2024, when alumina production will cease. Certain processes will continue until about the third quarter of 2025, when the employee number will be further reduced to approximately 50. Warrick smelter—During the fourth quarter 2023, the Company took actions to improve the competitiveness of its Warrick Operations site in Indiana. Alcoa began the restart of one line (54,000 mtpy) that was curtailed in July 2022, and also began the closure of a line (54,000 mtpy) that had not operated since 2016 to allow for future capital investments to improve casting capabilities. Intalco smelter—The Company announced the closure of the previously curtailed Intalco aluminum smelter in March 2023 after evaluating various options for the asset. The facility has been fully curtailed since 2020. Capital Returns In each quarter of 2023, the Board of Directors declared a quarterly cash dividend of $0.10 per share of the Company’s common stock, totaling $72 for the year. Balance Sheet Actions On January 17, 2024, the Company amended its Revolving Credit Facility to provide additional flexibility to implement portfolio actions during 2024, by providing for a temporary reduction of the minimum interest coverage ratio required thereunder from 4.00 to 1.00 to 3.00 to 1.00, and increasing the maximum addback for cash restructuring charges to Consolidated EBITDA (as defined in the Revolving Credit Facility), in each case for the 2024 fiscal year. In connection with the amendment, Alcoa also agreed to provide collateral for its obligations under the Revolving Credit Facility, with a ratings-based release mechanism that would apply starting in 2025. In April 2023, the Company purchased group annuity contracts to transfer approximately $235 of pension obligations and assets associated with defined benefit pension plans for approximately 530 Canadian retirees and beneficiaries. As a result, Alcoa recognized a non-cash settlement loss of $21 ($16 after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations in the second quarter of 2023. See Part II Item 8 of this Form 10-K in Note O to the Consolidated Financial Statements for additional information. 51 Other Matters In July 2023, the Supreme Court of Spain ratified the Global Settlement Agreement (GSA) with the workers of the divested Avilés and La Coruña facilities to settle various legal disputes related to the 2019 divestiture of those facilities. Upon completion of the remaining administrative and judicial approvals, the Company made cash payments of $76 to the former employees of the facilities in 2023 in accordance with the GSA. The remaining payments will be made in early 2024. In the first quarter of 2023, the Company recorded an adjustment related to the Company’s Ma’aden Aluminum joint venture for the settlement of a dispute with an industrial utility for periods in 2021 and 2022. Alcoa’s share of this adjustment was $41 which is included in Other expenses (income), net on the Statement of Consolidated Operations for year ended December 31, 2023. Alcoa’s total share of this dispute of $62 includes $21 that was recorded in the fourth quarter of 2022. In April 2023, the Company entered into a one-year unsecured revolving credit facility for $250 (available to be drawn in Japanese yen). See the below sections for additional details on the above-described actions. Basis of Presentation The Consolidated Financial Statements of Alcoa Corporation are prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). In accordance with GAAP, certain situations require management to make estimates based on judgments and assumptions, which may affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements. They also may affect the reported amounts of revenues and expenses during the reporting periods. Management uses historical experience and all available information to make these estimates. Management regularly evaluates the judgments and assumptions used in its estimates, and results could differ from those estimates upon future events and their effects or new information. Results of Operations The discussion that follows includes a comparison of our results of operations and liquidity and capital resources for the fiscal years ended December 31, 2023 and 2022. For a comparison of changes for the fiscal years ended December 31, 2022 and 2021, refer to Management’s Discussion and Analysis of Financial Condition and Results of Operation in Part II Item 7 of Alcoa Corporation’s Annual Report on Form 10-K for the year ended December 31, 2022 (filed February 23, 2023). Statement of Operations Sales Cost of goods sold (exclusive of expenses below) Selling, general administrative, and other expenses Research and development expenses Provision for depreciation, depletion, and amortization Restructuring and other charges, net Interest expense Other expenses (income), net Total costs and expenses (Loss) income before income taxes Provision for income taxes Net (loss) income Less: Net (loss) income attributable to noncontrolling interest Net loss attributable to Alcoa Corporation Selected Financial Metrics Diluted loss per share attributable to Alcoa Corporation common shareholders Third-party shipments of alumina (kmt) Third-party shipments of aluminum (kmt) Average realized price per metric ton of alumina Average realized price per metric ton of aluminum Average Alumina Price Index (API)(1) Average London Metal Exchange (LME) 15-day lag(2) 52 For the year ended December 31, 2022 2023 $ $ $ $ $ $ $ 10,551 9,813 226 39 632 184 107 134 11,135 (584) 189 (773) (122) (651) (3.65) 8,698 2,491 358 2,828 343 2,249 $ $ $ $ $ $ $ 2023 12,451 10,212 204 32 617 696 106 (118) 11,749 702 664 38 161 (123) (0.68) 9,169 2,570 384 3,457 365 2,726 2022 (1) API (Alumina Price Index) is a pricing mechanism that is calculated by the Company based on the weighted average of a prior month’s daily spot prices published by the following three indices: CRU Metallurgical Grade Alumina Price; Platts Metals Daily Alumina PAX Price; and FastMarkets Metal Bulletin Non-Ferrous Metals Alumina Index. (2) LME (London Metal Exchange) is a globally recognized exchange for commodity trading, including aluminum. The LME pricing component represents the underlying base metal component, based on quoted prices for aluminum on the exchange. Annual Comparison Overview Net loss attributable to Alcoa Corporation increased $528 primarily as a result of: • Lower average realized prices of aluminum and alumina • Higher production costs across both segments • Lower equity investment earnings • Absence of favorable mark-to-market results on derivative instruments Partially offset by: • Lower restructuring charges • Lower taxes on lower earnings and a lower net charge for valuation allowances on certain deferred tax assets in 2023 • Lower energy costs, primarily in Europe • Favorable currency impacts Sales Sales decreased $1,900 primarily as a result of: • Lower average realized prices of aluminum and alumina • Lower shipments across both segments • Lower trading activities • Decrease in value add product sales Partially offset by: • Higher volumes and price from bauxite offtake and supply agreements Cost of goods sold Cost of goods sold as a percentage of sales increased 11% primarily as a result of: • Lower average realized prices of aluminum and alumina • Higher production costs primarily related to operating certain of the Australian refineries with lower grade bauxite, the partial curtailment of the San Ciprián refinery, and increased maintenance • Decrease in value add product sales Partially offset by: • Lower energy costs • Favorable currency impacts Selling, general administrative, and other expenses Selling, general administrative, and other expenses increased $22 primarily as a result of: • Higher labor costs and external legal fees Provision for depreciation, depletion, and amortization The Provision for depreciation, depletion, and amortization increased $15 primarily as a result of: • Higher depreciation in Brazil and Australia for mine reclamation and bauxite residue storage asset retirement obligations • Write offs of assets for projects no longer being pursued Partially offset by: • Lower depreciation resulting from the permanent closure of the Intalco aluminum smelter • Favorable currency impacts 53 Interest expense Interest expense increased $1 in comparison to 2022. Other expenses (income), net Other expenses (income), net was $134 in 2023, compared with $(118) in 2022. The unfavorable change of $252 was primarily a result of: • Mark-to-market results on derivative instruments primarily due to the absence of prior year gains driven by elevated power prices in 2022 • Decrease in equity earnings from the Ma’aden aluminum joint venture primarily due to a charge for a utility settlement, lower shipments, and lower aluminum prices • Higher equity losses from the Ma’aden bauxite and alumina joint venture primarily due to lower alumina prices and higher raw material costs partially offset by higher shipments • Higher ELYSIS capital contributions, which triggered loss recognition Partially offset by: • Lower pension expense primarily due to a decrease in recognized net actuarial losses subsequent to pension annuity transactions • Favorable currency revaluation impacts driven by the absence of losses recognized in the prior year due to the U.S. dollar strengthening against most currencies, and gains recognized in the current year primarily due to the U.S. dollar weakening against the Brazilian real Restructuring and other charges, net In 2023, Restructuring and other charges, net of $184 primarily related to: • $101 for the permanent closure of the previously curtailed Intalco aluminum smelter • $53 related to the updated viability agreement for the San Ciprián aluminum smelter • $21 for the settlement of certain pension benefits • $15 to record net additional environmental and asset retirement obligation reserves at previously closed locations • $11 for employee termination and severance costs, primarily related to Kwinana refinery productivity program Partially offset by: • $19 for the sale of unused carbon credits at a previously closed location In 2022, Restructuring and other charges, net of $696 primarily related to: • $632 for U.S. pension group annuity contracts and lump sum settlements • $79 for the accrual related to the GSA for the workers of the divested Avilés and La Coruña facilities • $58 for an asset impairment related to the sale of the Company’s interest in the MRN mine • $29 for the permanent closure of the previously curtailed magnesium smelter in Addy (Washington) Partially offset by: • $83 for the reversal of state VAT valuation allowance associated with the restart of the Alumar smelter • $10 for changes in estimated take-or-pay contract costs at the curtailed Intalco smelter and closed Wenatchee (Washington) smelter • $9 net reversal of environmental and ARO obligations and previously closed locations Provision for income taxes The Provision for income taxes in 2023 was $189 on a loss before taxes of $(584) or (32.4)%. In comparison, the 2022 Provision for income taxes was $664 on income before taxes of $702 or 94.6%. The decrease in tax expense of $475 was primarily attributable to lower income in the jurisdictions where taxes were paid. Additionally, tax expense in 2023 included a charge of $152 to record a full valuation allowance against the deferred tax assets of Alcoa World Alumina Brasil Ltda. (AWAB), partially offset by the full reversal of the valuation allowance of $58 recorded against the deferred tax assets of the Company’s subsidiaries in Iceland. Tax expense in 2022 included charges of $217 to record a full valuation allowance against the deferred tax assets of Alcoa Alumínio (Alumínio) and $30 primarily to write off the deferred tax assets of Alcoa Norway ANS due to a legal entity restructuring, partially offset by a tax benefit of $33 due to changes in the utilization of the tax holiday rate in AWAB. 54 In December 2023, Alcoa recorded a valuation allowance of $154 against the net deferred tax assets of AWAB, of which $106 related to the balance as of December 31, 2022. The 2023 full valuation allowance was a result of AWAB’s three-year cumulative loss position for the period ended December 31, 2023. The majority of AWAB’s net deferred tax assets relate to prior net operating losses; the loss carryforwards are not subject to an expiration period. AWAB’s profitability in future periods could prompt the Company to evaluate the realizability of the deferred tax asset and assess the possibility of a reversal of the valuation allowance, which could have a significant impact on net income in the quarter the valuation allowance is reversed. The Company’s subsidiaries in Iceland had a full valuation allowance recorded against deferred tax assets, which was established in 2015 and 2017, as the Company believed it was more likely than not that these tax benefits would not be realized. During 2023, after considering all positive and negative evidence, including the expectation that the jurisdiction will remain in a three-year cumulative income position, the Company determined that it is more likely than not that the net deferred tax assets will be realized. Based on this conclusion, the Company reversed the valuation allowance totaling $58 during 2023, generating a non-cash benefit from income taxes. In 2022, a valuation allowance of $217 was recorded against the net deferred tax assets of Alumínio. Management concluded that it was more likely than not that Alumínio’s net deferred tax assets, which consisted primarily of tax loss carryforwards, would not be realized as a result of Alumínio’s three-year cumulative loss position for the period ended December 31, 2022. Noncontrolling interest Net (loss) income attributable to noncontrolling interest was $(122) in 2023 compared with $161 in 2022. These amounts are entirely related to Alumina Limited’s 40% ownership interest in several affiliated operating entities. The change is primarily a result of higher production costs, lower average realized price of alumina, unfavorable mark-to-market results on derivative instruments, higher elimination of intercompany profit in inventory, partially offset by lower energy costs and lower taxes. Segment Information Alcoa Corporation is a producer of bauxite, alumina, and aluminum products. In January 2023, the financial information provided to the Chief Operating Decision Maker (CODM) for the activities of the bauxite mines and the alumina refineries was combined into the Alumina segment, and accordingly the Company changed its operating segments. Beginning in the first quarter of 2023, the Company’s operations consisted of two worldwide reportable segments: Alumina and Aluminum. Segment information for all prior periods presented was updated to reflect the new segment structure. Segment performance under Alcoa Corporation’s management reporting system is evaluated based on a number of factors; however, the primary measure of performance is the Adjusted EBITDA (Earnings before interest, taxes, depreciation, and amortization) for each segment. The Company calculates Segment Adjusted EBITDA as Total sales (third-party and intersegment) minus the following items: Cost of goods sold; Selling, general administrative, and other expenses; and Research and development expenses. Alcoa Corporation’s Segment Adjusted EBITDA may not be comparable to similarly titled measures of other companies. The CODM function regularly reviews the financial information, including Adjusted EBITDA, of these two operating segments to assess performance and allocate resources. Segment Adjusted EBITDA totaled $734 in 2023 and $2,280 in 2022. The following information provides production, shipments, sales, and Segment Adjusted EBITDA data for each reportable segment, as well as certain realized price and average cost data, for each of the two years in the period ended December 31, 2023. 55 Alumina Bauxite production (mdmt) Third-party bauxite shipments (mdmt) Alumina production (kmt) Third-party alumina shipments (kmt) Intersegment alumina shipments (kmt) Total alumina shipments (kmt) Third-party bauxite sales Third-party alumina sales Total segment third-party sales Intersegment alumina sales Total sales Segment Adjusted EBITDA Average realized third-party price per metric ton of alumina Operating costs Average cost per metric ton of alumina shipped 2023 2022 41.0 7.6 10,908 8,698 4,125 12,823 484 3,129 3,613 1,648 5,261 273 358 4,524 353 $ $ $ $ $ $ $ 42.1 3.5 12,544 9,169 3,958 13,127 204 3,520 3,724 1,708 5,432 788 384 4,406 336 $ $ $ $ $ $ $ In the above table, total alumina shipments include metric tons that were not produced by the Alumina segment. Such alumina was purchased to satisfy certain customer commitments. The Alumina segment bears the risk of loss of the purchased alumina until control of the product has been transferred to this segment’s customers. Additionally, operating costs in the table above includes all production-related costs: raw materials consumed; conversion costs, such as labor, materials, and utilities; depreciation and amortization; and plant administrative expenses. Overview. This segment represents the Company’s global bauxite mining operations and worldwide refining system, which processes bauxite into alumina. The alumina produced by this segment is sold primarily to internal and external aluminum smelter customers; a portion of the alumina is sold to external customers who process it into industrial chemical products. Approximately two-thirds of the production of alumina is sold under supply contracts to third parties worldwide, while the remainder is used internally by the Aluminum segment. Alumina produced by this segment and used internally is transferred to the Aluminum segment at prevailing market prices. A portion of this segment’s third-party sales are completed through the use of alumina traders. Generally, this segment’s sales are transacted in U.S. dollars while costs and expenses are transacted in the local currency of the respective operations, which are the Australian dollar, the Brazilian real, and the euro. Most of the operations that comprise the Alumina segment are part of AWAC (see Noncontrolling Interest above). A portion of this segment’s bauxite production represents the offtake from equity method investments in Brazil (prior to the MRN sale in April 2022) and Guinea, as well as AWAC’s share of bauxite production related to an equity investment in Saudi Arabia. Bauxite mined is primarily used internally within the Alumina segment; a portion of the bauxite is sold to external customers. Bauxite sales to third-parties are conducted on a contract basis. This segment also includes AWAC’s 25.1% ownership interest in the mining and refining joint venture company in Saudi Arabia. Business Update. The average API of $343 per metric ton trended unfavorably compared to 2022 reflecting a 6% sequential decrease. During 2023, the Alumina segment experienced higher production costs primarily due to operating certain of the Australian refineries with lower grade bauxite and the partial curtailment of the San Ciprián refinery in 2022, partially offset by lower energy costs compared to 2022. Alumina production decreased 13% in 2023 compared to 2022 primarily due to the partial curtailment of capacity at the San Ciprián refinery in 2022, partial curtailment of the Kwinana refinery in the first quarter of 2023, and reduced production at the Australia refineries due to lower grade bauxite. Production at the Alumar refinery in 2023 was less than 2022 primarily due to unplanned equipment maintenance. 56 Australia Mine Plan Approvals In December 2023, the Western Australian (WA) Government approved Alcoa’s latest five-year mine plan – known as the 2023-2027 Mining and Management Program (MMP) – for its Huntly and Willowdale bauxite mines. Alcoa is subject to a range of stringent conditions addressing key environmental factors that includes enhanced protections for drinking water, including increased distances from reservoirs, and biodiversity along with accelerated forest rehabilitation. The accelerated forest rehabilitation will require an acceleration of cash spend of approximately $40 over the next three and half years from asset retirement obligations already recorded. In addition, the WA Government granted an exemption that allows Alcoa to continue its mining operations while the WA EPA assesses the environmental impact of parts of the MMP, following a third party’s referral of the Company’s future and existing mine plans in existing mine regions to the WA EPA in the first quarter of 2023. In the second quarter of 2023, Alcoa began mining lower grade bauxite in areas at the Huntly mine (that supplies the Pinjarra and Kwinana refineries) as it continued to work through the annual mine approvals process. The reduction in grade increases the use of caustic, energy, and bauxite, and decreases alumina output. Separately, Alcoa has committed to continuing to work with the Western Australian government to modernize the approvals framework for its two bauxite mines and three alumina refineries in the state. This includes transitioning all proposed new major mining regions to the more contemporary EPA assessment and approvals process. Alcoa started this process in 2020, when it referred its next two proposed mine regions (Myara North and Holyoake) for WA EPA assessment. The Company expects the bauxite quality at Myara North and Holyoake to be more consistent with the historic higher quality at the existing Myara Central. Alcoa continues to work to secure approvals for these new regions and anticipates mining in the new regions no earlier than 2027. Until then, the Company expects bauxite quality similar to recent grades. Kwinana Refinery On January 8, 2024, the Company announced the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. The refinery has an annual nameplate capacity of 2.2 million metric tons and has been operating at approximately 80 percent of its nameplate capacity since January 2023, when the Company reduced production by decreasing process flows and taking offline one of five digesters in response to a domestic natural gas shortage in Western Australia due to production challenges experienced by key gas suppliers. While the supply of natural gas improved in April 2023, the Company kept the one digester offline due to the prolonged annual mine plan approvals process. The full curtailment will include a phased reduction of the workforce from around 800 employees at the start of 2024 to approximately 250 in the third quarter of 2024, when all alumina production will cease. Certain processes will continue until about the third quarter of 2025, when employee numbers will be further reduced to approximately 50. In the first quarter of 2024, Alcoa will record restructuring charges between $180 and $200 related to the curtailment of the refinery. The charges include approximately $81 for water management costs, $55 for employee related costs, $26 for asset retirement obligations, and $18 of other costs. Alcoa’s share of related cash outlays of approximately $115 (which includes existing employee related liabilities and asset retirement obligations) is expected to be spent in 2024 ($80) and 2025 ($35). The Kwinana refinery recorded a net loss (pretax and noncontrolling interest) of approximately $130 in 2023. The Company expects annual improvements of approximately $70 (pretax and noncontrolling interest) beginning in the third quarter of 2024 as a result of the curtailment. During the third quarter of 2023, the Company initiated productivity programs across its operations in Australia to mitigate the financial impacts of lower bauxite grade and to optimize current operating levels. The first announced action under the productivity programs was initiated at the Kwinana refinery. In connection with this program, the Company recorded a charge of $6 in Restructuring and other charges, net on the Statement of Consolidated Operations in the third quarter of 2023 for employee termination and severance costs for approximately 90 employees at the Kwinana refinery, which is expected to be paid through the second quarter of 2024. Alumar Refinery During 2023, the Alumar refinery experienced several challenges impacting production levels, maintenance, and production costs. During the fourth quarter of 2023, the Alumar refinery experienced periodic instability in power supply since the nationwide power outage that occurred on August 15, 2023, which caused lower production and other incremental costs to stabilize operations. In early July 2023, the repair of the ship-to-shore conveyance system that failed on March 25, 2023 and other unplanned equipment maintenance was completed at the Alumar refinery. As a result of the conveyance system event, bauxite discharge at the Alumar port was temporarily halted and the refinery operated on existing inventory until initial repairs were completed on April 8, 2023. Bauxite flows to the refinery were fully restored by the end of April 2023. The pier was not damaged and could still berth vessels. 57 Capacity. The Alumina segment had a base refining capacity of 13,843 kmt with 1,452 kmt of curtailed capacity. In the first quarter of 2023, curtailed capacity increased 438 kmt due to the reduction in production at the Kwinana refinery (see above). Production Alumina production decreased 13% primarily as a result of: Annual Comparison • The curtailment of capacity at the San Ciprián refinery in the third quarter of 2022 • The partial curtailment at the Kwinana refinery in the first quarter of 2023 • Reduced production at the Australia refineries due to lower grade bauxite • Unplanned equipment maintenance and periodic instability in power supply at the Alumar refinery in 2023 Third-party sales Third-party sales decreased $111 primarily as a result of: • Lower shipments of alumina primarily due to lower production at the Australian refineries, partially offset by increased trading opportunities • Lower average realized price of $26/ton principally driven by a lower average API • Unfavorable currency impacts Partially offset by: • Higher volumes and price from bauxite offtake and supply agreements primarily caused by the shift to third-party sales due to reduced production at the San Ciprián refinery Intersegment sales Intersegment sales decreased $60 primarily as a result of: • Lower average API on sales to the Aluminum segment Partially offset by: • Higher alumina shipments primarily due to the Alumar smelter restart Segment Adjusted EBITDA Segment Adjusted EBITDA decreased $515 primarily as a result of: • Higher production costs primarily related to operating certain of the Australian refineries with lower grade bauxite, the partial curtailment of the San Ciprián refinery, and increased maintenance • Lower average realized price of $26/ton principally driven by a lower average API Partially offset by: • Lower energy costs, primarily in Europe • Favorable currency impacts Forward Look. For 2024, the Company is providing projections for both production and shipments. Alcoa expects alumina production to range between 9.8 and 10.0 million metric tons and alumina shipments to range between 12.7 and 12.9 million metric tons in 2024. The difference between production and shipments reflects trading volumes and externally sourced alumina to fulfill customer contracts due to the curtailment of the Kwinana refinery. Further, in 2024, the Alumina segment expects to benefit from lower raw material costs. 58 Aluminum Production (kmt) Total shipments (kmt) Third-party aluminum sales Other(1) Total segment third-party sales Intersegment sales Total sales Segment Adjusted EBITDA Average realized third-party price per metric ton Operating costs Average cost per metric ton of aluminum shipped 2023 2022 2,114 2,491 7,045 (120) 6,925 15 6,940 461 2,828 6,419 2,577 $ $ $ $ $ $ $ 2,010 2,570 8,887 (152) 8,735 27 8,762 1,492 3,457 7,278 2,831 $ $ $ $ $ $ $ (1) Other includes third-party sales of energy, as well as realized gains and losses related to embedded derivative instruments designated as cash flow hedges of forward sales of aluminum. In the above table, total aluminum third-party shipments include metric tons that were not produced by the Aluminum segment. Such aluminum was purchased by this segment to satisfy certain customer commitments. The Aluminum segment bears the risk of loss of the purchased aluminum until control of the product has been transferred to this segment’s customer. Additionally, Total shipments includes offtake from a joint venture supply agreement. The average realized third-party price per metric ton of aluminum includes three elements: a) the underlying base metal component, based on quoted prices from the LME; b) the regional premium, which represents the incremental price over the base LME component that is associated with the physical delivery of metal to a particular region (e.g., the Midwest premium for metal sold in the United States); and c) the product premium, which represents the incremental price for receiving physical metal in a particular shape (e.g., billet, slab, rod, etc.) or alloy. Operating costs includes all production-related costs: raw materials consumed; conversion costs, such as labor, materials, and utilities; depreciation and amortization; and plant administrative expenses. Overview. This segment consists of the Company’s (i) worldwide smelting and casthouse system, which processes alumina into primary aluminum, and the (ii) portfolio of energy assets in Brazil, Canada, and the United States. Aluminum’s combined smelting and casting operations produce primary aluminum products, virtually all of which are sold to external customers and traders. The smelting operations produce molten primary aluminum, which is then formed by the casting operations into either common alloy ingot (e.g., t-bar, sow, standard ingot) or into value add ingot products (e.g., foundry, billet, rod, and slab). A variety of external customers purchase the primary aluminum products for use in fabrication operations, which produce products primarily for the transportation, building and construction, packaging, wire, and other industrial markets. Results from the sale of aluminum powder and scrap are also included in this segment, as well as the impacts of embedded aluminum derivatives related to energy supply contracts. The energy assets supply power to external customers in Brazil and, to a lesser extent, in the United States, as well as internal customers in the Aluminum (Canadian smelters and Warrick smelter) and Alumina segments (Brazilian refineries). Generally, this segment’s aluminum sales are transacted in U.S. dollars while costs and expenses of this segment are transacted in the local currency of the respective operations, which are the U.S. dollar, the euro, the Norwegian krone, the Icelandic króna, the Canadian dollar, the Brazilian real, and the Australian dollar. This segment also includes Alcoa Corporation’s 25.1% ownership interest in the smelting joint venture company in Saudi Arabia. Business Update. Aluminum prices decreased sequentially with LME prices on a 15-day lag averaging $2,249 per metric ton in 2023. Due to its production of commercial grade aluminum, in December 2023, the Company qualified for Section 45X of the Advanced Manufacturing Tax Credit, enacted as part of the Inflation Reduction Act, which improves the profitability of its smelters in the U.S. In the fourth quarter of 2023, the Company recorded a full year benefit in Cost of goods sold totaling $36 related to its Massena West (New York) smelter and its Warrick smelter. The Company has also requested revisions to the December 2023 regulations to allow for the inclusion of materials costs in the credit calculation. 59 In December 2023, the Norwegian government approved a budget proposal that limits carbon dioxide compensation to be paid in 2024 based on 2023 power purchased and used in production. The Company recorded an adjustment of $18 in the fourth quarter of 2023 to Cost of goods sold to reverse amounts accrued for 2023 credits earned through September 30, 2023, under the prior carbon dioxide compensation program. During the fourth quarter of 2023, the Company took actions to improve the competitiveness of its Warrick smelter. Alcoa began the restart of one line (54,000 mtpy) that was curtailed in July 2022, and also began the closure of one line (54,000 mtpy) that had not operated since 2016 to allow for future capital investments to improve casting capabilities. Restructuring charges related to the closure totaled $1 in the fourth quarter of 2023 to establish reserves related to demolition obligations. Additionally, Alcoa recorded $1 in Cost of goods sold to write-off the remaining net book value of related inventory. In the fourth quarter of 2023, Alcoa began the restart of 16,000 mtpy of previously curtailed capacity at the Portland smelter. The smelter had previously been operating at approximately 75 percent of the site’s total annual capacity of 197 kmt (Alcoa share) since March 2023 due to instability and challenges related to the production of rodded anodes. The smelter was operating at approximately 79 percent of its capacity at December 31, 2023. During 2023, the Company continued the controlled pace for the restart of the Alumar smelter in São Luís, Brazil, which was announced in September 2021. The site was operating at approximately 69 percent of the site’s total annual capacity of 268 kmt (Alcoa share) as of December 31, 2023. Alcoa incurred restart expenses of $33 during 2023. In March 2023, Alcoa announced the closure of the Intalco aluminum smelter (279 kmt of previously curtailed capacity). Charges related to the closure totaled $117 in the first quarter of 2023 and included a charge of $16 for the write down of remaining inventories to net realizable value recorded in Cost of goods sold on the Statement of Consolidated Operations and a charge of $101 recorded in Restructuring and other charges, net on the Statement of Consolidated Operations. The restructuring charges were comprised of $50 of asset impairments, $50 to establish reserves related to environmental and demolition obligations, and $1 of severance and employee termination costs. Cash outlays related to the permanent closure of the site are expected to be approximately $85 in 2024 and 2025. The Company spent $2 against the reserves in 2023. San Ciprián Smelter The San Ciprián smelter was curtailed in January 2022, as a result of an agreement with the workers’ representatives in December 2021. In February 2023, under the terms of an amended viability agreement, Alcoa agreed to a phased restart of the smelter beginning in January 2024, to operate an initial complement of approximately 6 percent of total pots, to restart all pots by October 1, 2025 and to maintain 75 percent of the annual capacity of 228 kmt from October 1, 2025 until the end of 2026. Long-term economic viability of any ramp up beyond the initial 6 percent of total pots will depend upon the availability of affordable power, which currently does not exist in adequate supply. While the Company has met its commitments to enter into power purchase agreements for the necessary capacity, that capacity has not been fully permitted by the government or built by the power provider, putting an on-time restart at significant risk and causing the smelter to incur substantial operating losses for longer, all of which is rendering the smelter economically unviable. Under the terms of both agreements, the Company is responsible for certain employee obligations from 2022 through 2025. As a result, the Company recorded charges of $53 and $62 in 2023 and 2021, respectively, in Restructuring and other charges, net on the Statement of Consolidated Operations to establish the related reserves. Cash payments were $38 and $26 in 2023 and 2022, respectively. The remaining reserves of $48 at December 31, 2023 relate to employee commitments in 2024 and 2025. Additionally, in connection with the agreements, the Company committed to capital improvements of $146 and smelter restart costs of $35, and incurred capital improvement expenditures of $28 during 2023. At December 31, 2023, the Company has restricted cash of $91 to be made available for the remaining capital improvements of $118 and smelter restart costs of $35. Capacity. At December 31, 2023, the Aluminum segment had 465 kmt of idle smelting capacity on a base capacity of 2,645 kmt, a decrease from 2022 of 403 kmt in idle capacity primarily due to the permanent closure of the previously curtailed Intalco smelter, closure of one line at the Warrick smelter, and the Alumar and Warrick smelter restarts, partially offset by the partial curtailment of the Portland smelter (see above). The Company updated nameplate capacity of certain facilities to reflect capital expenditures, upgrades, or other investments which expanded production capacity, and productivity initiatives and process and supply changes that improved capacity in a sustained manner. 60 Annual Comparison Production Production increased 5% primarily as a result of: • Alumar smelter restart Partially offset by: • Partial curtailment of the Lista (Norway) smelter in August 2022 Third-party sales Third-party sales decreased $1,810 primarily as a result of: • Lower average realized price of $629/ton driven by a lower average LME (on a 15-day lag) and lower regional premiums • Lower trading activities • Lower shipments primarily due to the absence of sales of accumulated inventory in 2022 from the San Ciprián smelter due to the strike in 2021 and partial curtailment of the Lista smelter • Decrease in value add product sales due to overall lower market demand and product premiums in both Europe and North America • Lower Warrick power plant energy sales Partially offset by: • Higher shipments due to the Alumar smelter restart and improved availability of railcars or vessels for outbound product from North American smelters Segment Adjusted EBITDA Segment Adjusted EBITDA decreased $1,031 primarily as a result of: • Lower average realized price based on LME (on a 15-day lag) and lower regional premiums • Lower Warrick power plant energy sales • Decrease in value add product sales • Higher production costs primarily associated with higher labor costs and increased maintenance costs Partially offset by: • Favorable raw material costs primarily on lower average alumina input costs • Lower energy costs, primarily in Europe • Favorable currency impacts Forward Look. For 2024, the Company is providing projections for both production and shipments. The Aluminum segment is expected to produce between 2.2 to 2.3 million metric tons of aluminum, an increase from 2023 due to smelter restarts. In 2024, aluminum shipments are expected to be between 2.5 and 2.6 million metric tons, consistent with 2023, as increased shipments from smelter restarts are offset by lower trading volumes. Additionally, the Company engages in aluminum commodity trading activity when favorable market conditions allow. Availability of trading opportunities in 2024 may impact the Company’s shipment projection. Further, in 2024, the Aluminum segment expects benefits from lower raw material and energy costs, primarily in Brazil and Norway, to be partially offset by lower value add aluminum product sales. 61 Reconciliations of Certain Segment Information Reconciliation of Total Segment Third-Party Sales to Consolidated Sales Alumina Aluminum Total segment third-party sales Other Consolidated sales Reconciliation of Total Segment Operating Costs to Consolidated Cost of Goods Sold Alumina Aluminum Other(1) Total segment operating costs Eliminations(2) Provision for depreciation, depletion, and amortization(3) Other(4) Consolidated cost of goods sold 2023 2022 3,613 6,925 10,538 13 10,551 2023 4,524 6,419 1,006 11,949 (1,670) (610) 144 9,813 $ $ $ $ $ 3,724 8,735 12,459 (8) 12,451 2022 4,406 7,278 721 12,405 (1,874) (595) 276 10,212 $ $ $ $ $ (1) Other largely relates to the Aluminum segment's energy product division and the Alumina segment's purchases of bauxite from offtake or other supply agreements that is sold to third-parties. (2) Represents the elimination of Cost of goods sold related to intersegment sales between Alumina and Aluminum. (3) Provision for depreciation, depletion, and amortization is included in the operating costs used to calculate average cost for each of the alumina and aluminum product divisions (see Alumina and Aluminum above). However, for financial reporting purposes, Provision for depreciation, depletion, and amortization is presented as a separate line item on Alcoa Corporation’s Statement of Consolidated Operations. (4) Other includes costs related to Transformation, and certain other items that are not included in the operating costs of segments (see footnotes 1 and 3 in the Reconciliation of Total Segment Adjusted EBITDA to Consolidated Net (Loss) Income Attributable to Alcoa Corporation below). Reconciliation of Total Segment Adjusted EBITDA to Consolidated Net Loss Attributable to Alcoa Corporation Total Segment Adjusted EBITDA Unallocated amounts: Transformation(1) Intersegment eliminations Corporate expenses(2) Provision for depreciation, depletion, and amortization Restructuring and other charges, net Interest expense Other (expenses) income, net Other(3) Consolidated (loss) income before income taxes Provision for income taxes Net loss (income) attributable to noncontrolling interest Consolidated net loss attributable to Alcoa Corporation 2023 2022 $ 734 $ 2,280 (80) 7 (133) (632) (184) (107) (134) (55) (584) (189) 122 $ (651) $ (66) 138 (128) (617) (696) (106) 118 (221) 702 (664) (161) (123) (1) Transformation includes, among other items, the Adjusted EBITDA of previously closed operations. (2) Corporate expenses are composed of general administrative and other expenses of operating the corporate headquarters and other global administrative facilities, as well as research and development expenses of the corporate technical center. (3) Other includes certain items that are not included in the Adjusted EBITDA of the reportable segments. 62 Environmental Matters See Part II Item 8 of this Form 10-K in Note S to the Consolidated Financial Statements under caption Contingencies—Environmental Matters. Liquidity and Capital Resources Alcoa Corporation’s primary future cash flows are centered on operating activities, particularly working capital, as well as capital expenditures and capital returns. Alcoa’s ability to fund its cash needs depends on the Company’s ongoing ability to generate and raise cash in the future. In 2023, the Company generated lower profitability due to lower prices for aluminum and alumina and higher production costs, partially offset by lower restructuring charges. Despite the challenging year, the Company maintained a strong cash position and successfully completed the following actions: • Entered into a Receivables Purchase Agreement facility and sold gross customer receivables of $591, and reinvested collections of $477 from previously sold receivables, resulting in net cash proceeds from the financial institution of $114; • Funded $531 in capital expenditures to sustain and grow our operations; • Entered into a revolving credit facility for $250 (available to be drawn in Japanese yen) (Japanese Yen Revolving Credit Facility); • Purchased group annuity contracts to transfer the obligation to pay remaining retirement benefits for approximately 530 retirees and beneficiaries from certain Canadian defined benefit pension plans. Transferred approximately $235 in both plan obligations and plan assets; • Returned capital to stockholders of $72. In each quarter of 2023, the Board of Directors declared and paid a quarterly cash dividend of $0.10 per share of the Company’s common stock; and, • Entered into multiple agreements with a financial institution for the sale and subsequent repurchase of aluminum inventory resulting in net short-term borrowings of $56 in 2023. In January 2024, the Company initiated the following actions: • Amended its Revolving Credit Facility to provide additional flexibility to implement portfolio actions during 2024, by providing for a temporary reduction of the minimum interest coverage ratio required thereunder from 4.00 to 1.00 to 3.00 to 1.00, and increasing the maximum addback for cash restructuring charges to Consolidated EBITDA (as defined in the Revolving Credit Facility), in each case for the 2024 fiscal year. In connection with the amendment, Alcoa also agreed to provide collateral for its obligations under the Revolving Credit Facility, with a ratings-based release mechanism that would apply starting in 2025. • Initiated a productivity and competitiveness program across its global operations and functions. The program is a first step in the Company’s objective to improve competitiveness and includes a target to save approximately 5 percent of operating costs, exclusive of raw materials, energy and transportation costs which are already under active management and cost control programs. Total savings are expected to approximate $100 on a run rate basis and to be achieved by the first quarter of 2025. • Initiated several operational changes to improve profitability, including engaging with government stakeholders and workers’ representatives to discuss ongoing financial difficulties at the San Ciprián operations, optimizing the Warrick smelter operations, completing the Alumar restart, and announcing the curtailment of the Kwinana refinery. Management believes that the Company’s cash on hand, projected cash flows, and liquidity options, combined with its strategic actions, will be adequate to fund its short-term (at least 12 months) and long-term operating and investing needs. On January 24, 2024, ANHBV drew $201 against the Japanese Yen Revolving Credit Facility to fund working capital requirements and reductions to date in the Company’s Cash and cash equivalents. The Company plans to opportunistically access liquidity sources to support its cash position and ongoing cash needs. Further, the Company has flexibility related to its use of cash; the Company has no significant debt maturities until 2027 and no significant cash contribution requirements related to its pension plan obligations (refer to Material Cash Requirements, below, for more information). Although management believes that Alcoa’s projected cash flows and other liquidity options will provide adequate resources to fund operating and investing needs, the Company’s access to, and the availability of, financing on acceptable terms in the future will be affected by many factors, including: (i) Alcoa Corporation’s credit rating; (ii) the liquidity of the overall capital markets; (iii) the current state of the economy and commodity markets, and (iv) short- and long-term debt ratings. There can be no assurances that the Company will continue to have access to capital markets on terms acceptable to Alcoa Corporation. 63 Changes in market conditions caused by global or macroeconomic events, such as ongoing regional conflicts, high inflation, and changing global monetary policies could have adverse effects on Alcoa’s ability to obtain additional financing and cost of borrowing. Inability to generate sufficient earnings could impact the Company’s ability to meet the financial covenants in our outstanding debt and revolving credit facility agreements and limit our ability to access these sources of liquidity or refinance or renegotiate our outstanding debt or credit agreements on terms acceptable to the Company. Additionally, the impact on market conditions from such events could adversely affect the liquidity of Alcoa’s customers, suppliers, and joint venture partners and equity method investments, which could negatively impact the collectability of outstanding receivables and our cash flows. At December 31, 2023, the Company’s cash and cash equivalents were $944, of which $801 was held outside the United States. Alcoa Corporation has a number of commitments and obligations related to the Company’s operations in various foreign jurisdictions, resulting in the need for cash outside the United States. Alcoa Corporation continuously evaluates its local and global cash needs for future business operations, which may influence future repatriation decisions. See Part II Item 8 of this Form 10-K in Note Q to the Consolidated Financial Statements for additional information related to undistributed net earnings. Cash from Operations Cash provided from operations was $91 in 2023 compared with $822 in 2022. Notable changes to the sources and (uses) of cash include: • ($1,323) lower net income, excluding the impacts from restructuring charges, primarily due to lower aluminum pricing, higher production costs, partially offset by lower energy costs; • $690 in certain working capital accounts, primarily an increase in inventories in 2022 on higher raw material prices and a decrease in inventories in 2023 primarily on lower raw material prices; and, • $216 less income taxes paid on prior year earnings, as well as on lower current year earnings in the jurisdictions where taxes are paid. In the third quarter of 2020, AofA paid approximately $74 (A$107) to the ATO related to the tax dispute described in Note S to the Consolidated Financial Statements in Part II Item 8 of this Form 10-K. Upon payment, AofA recorded a noncurrent prepaid tax asset, as the Company continues to believe it is more likely than not that AofA’s tax position will be sustained and therefore is not recognizing any tax expense in relation to this matter. In accordance with Australian tax laws, the initial interest assessment and additional interest are deductible against AofA’s taxable income. AofA applied this deduction beginning in the third quarter of 2020, reducing cash tax payments. If AofA is ultimately successful, the interest deduction would become taxable as income in the year the dispute is resolved. In addition, should the ATO decide in the interim to reduce any interest already assessed, the reduction would be taxable as income at that point in time. During 2023, AofA continued to record its tax provision and tax liability without effect of the ATO assessment, since it expects to prevail. The tax payable will remain on AofA’s balance sheet as a noncurrent liability, increased by the tax effect of subsequent periods’ interest deductions, until dispute resolution, which is expected to take several years. At December 31, 2023 and December 31, 2022, the noncurrent liability resulting from the cumulative interest deductions was approximately $199 (A$293) and $174 (A$260), respectively. The Company utilizes a Receivables Purchase Agreement facility to sell up to $130 of certain receivables through a special purpose entity (SPE) to a financial institution on a revolving basis. Alcoa Corporation guarantees the performance obligations of the Company subsidiaries, and unsold customer receivables are pledged as collateral to the financial institution to secure the sold receivables. At December 31, 2023, the SPE held unsold customer receivables of $104 pledged as collateral against the sold receivables. The Company continues to service the customer receivables that were transferred to the financial institution. As Alcoa collects customer payments, the SPE transfers additional receivables to the financial institution rather than remitting cash. In 2023, the Company sold gross customer receivables of $591, and reinvested collections of $477 from previously sold receivables, resulting in net cash proceeds from the financial institution of $114. Cash collections from previously sold receivables yet to be reinvested of $99 were included in Accounts payable, trade on the accompanying Consolidated Balance Sheet as of December 31, 2023. Cash received from sold receivables under the agreement are presented within operating activities in the Statement of Consolidated Cash Flows. See Part II Item 8 of this Form 10-K in Note I to the Consolidated Financial Statements for additional information related to this facility. 64 Financing Activities Cash provided from financing activities was $57 in 2023 compared with cash used for financing activities of $768 in 2022. The source of cash in 2023 was primarily $158 of net contributions from Alumina Limited (see Noncontrolling interest above) and $55 primarily related to the net issuance of short-term borrowings (see below), partially offset by $72 of dividends paid, $52 in financial contributions primarily related to the sale of the Warrick Rolling Mill, and $34 for payments related to tax withholding on stock-based compensation awards. The use of cash in 2022 was primarily $165 of net cash paid to Alumina Limited, $500 for the repurchase of common stock, and $72 of dividends paid. Credit Facilities. Revolving Credit Facility On June 27, 2022, Alcoa Corporation and Alcoa Nederland Holding B.V. (ANHBV), a wholly owned subsidiary of Alcoa Corporation and the borrower, entered into an amendment and restatement agreement (the Third Amendment and Restatement) (as amended and restated, the Revolving Credit Facility) that provided additional flexibility to the Company and ANHBV by (i) extending the maturity date of the Revolving Credit Facility from November 2023 to June 2027, (ii) reducing the aggregate commitments under the facility from $1,500 to $1,250, (iii) releasing the collateral package that had previously secured the Revolving Credit Facility, which would have continued so long as certain credit ratings were maintained, (iv) increasing the maximum leverage ratio from 2.75 to 1.00 to 3.25 to 1.00, which increased following material acquisitions for four consecutive fiscal quarters following an acquisition, (v) providing a debt to capitalization ratio not to exceed .60 to 1.00 to replace the maximum leverage ratio upon a ratings upgrade to investment grade by Moody’s Investor Service (Moody’s) or Standard and Poor’s Global Ratings (S&P), and (vi) providing flexibility for dividends and other restricted payments, to make investments, and to incur additional indebtedness. The Revolving Credit Facility implemented a sustainability adjustment to the applicable margin and commitment fee that may result in a positive or negative adjustment based on two of the Company’s existing sustainability metrics. On July 26, 2022, Moody’s upgraded the rating of ANHBV’s senior unsecured notes to Baa3 (investment grade). In addition to the financial covenants, the Revolving Credit Facility includes several customary affirmative and negative covenants (applicable to Alcoa Corporation and certain subsidiaries described as restricted), that, subject to certain exceptions, include limitations on (among other things): indebtedness, liens, investments, sales of assets, restricted payments, entering into restrictive agreements, a covenant prohibiting reductions in the ownership of AWAC entities, and certain other specified restricted subsidiaries of Alcoa Corporation, below an agreed level. The Revolving Credit Facility also contains customary events of default, including failure to make payments under the Revolving Credit Facility, cross-default and cross-judgment default, and certain bankruptcy and insolvency events. As of December 31, 2023, the Company was in compliance with all financial covenants. The Company may access the entire amount of commitments under the Revolving Credit Facility. There were no borrowings outstanding at December 31, 2023 and 2022, and no amounts were borrowed during 2023 and 2022 under the Revolving Credit Facility. On January 17, 2024, Alcoa Corporation, ANHBV, and certain subsidiaries of the Company entered into Amendment No. 1 (Amendment No. 1) to the Revolving Credit Facility (Amended Revolving Credit Facility). The Amended Revolving Credit Facility provides additional flexibility to the Company and the Borrower by temporarily (i) reducing the minimum interest coverage ratio required thereunder from 4.00 to 1.00 to 3.00 to 1.00 and (ii) providing for a maximum addback for cash restructuring charges in Consolidated EBITDA (as defined in the Revolving Credit Facility) of $450, in each case for the 2024 fiscal year. As of January 1, 2025, the minimum interest coverage ratio requirement will revert to 4.00 to 1.00 and the maximum addback for cash restructuring charges in Consolidated EBITDA will revert to 15% of Consolidated EBITDA. The requirement that the Company maintain a debt to capitalization ratio not to exceed .60 to 1.00 was not changed by Amendment No. 1. In connection with Amendment No. 1, the Company also agreed to provide collateral for its obligations under the Amended Revolving Credit Facility, which will require it to execute all security documents to re-secure collateral under the Amended Revolving Credit Facility by, subject to certain exceptions, a first priority security interest in substantially all assets of the Company, the Borrower, the material domestic wholly-owned subsidiaries of the Company, and the material foreign wholly-owned subsidiaries of the Company located in Australia, Brazil, Canada, Luxembourg, the Netherlands, Norway, and Switzerland including equity interests of certain subsidiaries that directly hold equity interests in AWAC entities. The collateral would be released if, on or after January 1, 2025, the Company or the Borrower (as applicable) (i) has at least two of the following three designated ratings: (x) Baa3 from Moody’s, (y) BBB- from S&P and (z) BBB- from Fitch Ratings and (ii) does not have any designated rating lower than: (x) Ba1 from Moody’s, (y) BB+ from S&P and (z) BB+ from Fitch Ratings. 65 The Amended Revolving Credit Facility contains customary affirmative covenants, negative covenants, and events of default substantially comparable to the Revolving Credit Facility (other than those that are described above and other minor changes). The representations, warranties and covenants contained in the Amended Revolving Credit Facility were made only for purposes of Amendment No. 1 and as of specific dates and were solely for the benefit of the parties to the Amended Revolving Credit Facility. Japanese Yen Revolving Credit Facility In April 2023, the Company entered into a one-year unsecured revolving credit facility for $250 (available to be drawn in Japanese yen) (the Japanese Yen Revolving Credit Facility). Subject to the terms and conditions under the facility, the Company or ANHBV may borrow funds. The facility included covenants that are substantially the same as those included in the Revolving Credit Facility. As of December 31, 2023, the Company was in compliance with all financial covenants. The Company may access the entire amount of commitments under the facility. There were no borrowings outstanding at December 31, 2023 and $10 was borrowed and subsequently repaid in 2023. On January 17, 2024, Alcoa Corporation and ANHBV, entered into Amendment No. 1 to the Japanese Yen Revolving Credit Facility (Amended Japanese Yen Revolving Credit Facility) which contains changes that are substantially the same as those included in the Amended Revolving Credit Facility (as described above). Also in connection with this amendment, the Company agreed to provide collateral for its obligations with the same conditions as the Amended Revolving Credit Facility. On January 24, 2024, ANHBV drew $201 against this facility. The Company may draw on these facilities periodically to ensure working capital needs are met. See Part II Item 8 of this Form 10-K in Note M to the Consolidated Financial Statements for additional information related to these facilities. Guarantees of Third Parties. As of December 31, 2023 and 2022, the Company had no outstanding potential future payments for guarantees issued on behalf of a third-party. Bank Guarantees and Letters of Credit. Alcoa Corporation and its subsidiaries have outstanding bank guarantees and letters of credit related to, among others, energy contracts, environmental obligations, legal and tax matters, leasing obligations, workers compensation, and customs duties. The total amount committed under these instruments, which automatically renew or expire at various dates between 2024 and 2025, was $294 (includes $86 issued under a standby letter of credit agreement —see below) at December 31, 2023. Additionally, ParentCo has outstanding bank guarantees and letters of credit related to the Company of $13 at December 31, 2023. In the event ParentCo would be required to perform under any of these instruments, ParentCo would be indemnified by Alcoa Corporation in accordance with the Separation and Distribution Agreement. Likewise, the Company has outstanding bank guarantees and letters of credit related to ParentCo of $8 at December 31, 2023. In the event Alcoa Corporation would be required to perform under any of these instruments, the Company would be indemnified by ParentCo in accordance with the Separation and Distribution Agreement. In December 2023, AofA committed to provide a bank guarantee for approximately $68 (A$100) which demonstrates Alcoa’s confidence that its operations will not impair drinking water supplies. In August 2017, Alcoa Corporation entered into a standby letter of credit agreement, which expires on June 27, 2024 (amended in August 2018, May 2019, May 2021, June 2022, and January 2024), with three financial institutions. The agreement provides for a $200 facility used by the Company for matters in the ordinary course of business. Alcoa Corporation’s obligations under this facility are secured in the same manner as obligations under the Company’s revolving credit facility. Additionally, this facility contains similar representations and warranties and affirmative, negative, and financial covenants as the Company’s Revolving Credit Facility. See Part II Item 8 of this Form 10-K in Note M to the Consolidated Financial Statements for additional information related to the Company’s debt. As of December 31, 2023, letters of credit aggregating $86 were issued under this facility. Surety Bonds. Alcoa Corporation has outstanding surety bonds primarily related to tax matters, contract performance, workers compensation, environmental-related matters, and customs duties. The total amount committed under these bonds, which automatically renew or expire at various dates between 2024 and 2028, was $190 at December 31, 2023. Additionally, ParentCo has outstanding surety bonds related to the Company of $8 at December 31, 2023. In the event ParentCo would be required to perform under any of these instruments, ParentCo would be indemnified by Alcoa Corporation in accordance with the Separation and Distribution Agreement. Likewise, the Company has outstanding surety bonds related to ParentCo of $5 at December 31, 2023. In the event Alcoa Corporation would be required to perform under any of these instruments, the Company would be indemnified by ParentCo in accordance with the Separation and Distribution Agreement. 66 Debt. As of December 31, 2023, Alcoa Corporation had three outstanding series of Notes maturing at varying times. A summary of the Notes and other long-term debt is shown below. See Part II Item 8 of this Form 10-K in Note M to the Consolidated Financial Statements for additional information related to the Company’s debt. December 31, 5.500% Notes, due 2027 6.125% Notes, due 2028 4.125% Notes, due 2029 Other Unamortized discounts and deferred financing costs Total Less: amount due within one year Long-term debt, less amount due within one year 2023 2022 $ $ 750 500 500 82 (21) 1,811 79 1,732 $ $ 750 500 500 84 (27) 1,807 1 1,806 During 2023, the Company entered into multiple agreements with a financial institution for the sale and subsequent repurchase of aluminum inventory. The Company did not record sales upon each shipment of inventory, and the net cash received of $56 was recorded in Short-term borrowings within Other current liabilities on the Consolidated Balance Sheet. During 2023, the Company recorded borrowings of $117 and repurchased $61 of inventory related to these agreements. The cash received and subsequently paid under the inventory repurchase agreements is included in Cash provided from financing activities on the Statement of Consolidated Cash Flows in 2023. Ratings. Alcoa Corporation’s cost of borrowing and ability to access the capital markets are affected not only by market conditions but also by the short- and long-term debt ratings assigned to Alcoa Corporation’s debt by the major credit rating agencies. On January 12, 2024, Moody’s affirmed a Baa3 (investment grade) rating of ANHBV’s long-term debt and revised the outlook from stable to negative. On December 20, 2023, Fitch Ratings affirmed a BBB- rating for Alcoa Corporation’s long-term debt and revised the outlook from stable to negative. On September 13, 2023, S&P affirmed the BB+ rating of Alcoa’s long-term debt and affirmed the current outlook as positive. Ratings are not a recommendation to buy or hold any of our securities and they may be revised or revoked at any time at the sole discretion of the rating organization. Dividend. In each quarter of 2023, the Board of Directors declared and paid a quarterly cash dividend of $0.10 per share of the Company’s common stock, totaling $72 for the year. The details of any future cash dividend declaration, including the amount of such dividend and the timing and establishment of the record and payment dates, will be determined by the Board of Directors. The decision of whether to pay future cash dividends and the amount of any such dividends will be based on the Company's financial position, results of operations, cash flows, capital requirements, business conditions, the requirements of applicable law, and any other factors the Board of Directors may deem relevant. Common Stock Repurchase Program. In October 2021, Alcoa Corporation’s Board of Directors approved a common stock repurchase program under which the Company may purchase shares of its outstanding common stock up to an aggregate transactional value of $500, depending on cash availability, market conditions, and other factors. On July 20, 2022, Alcoa Corporation announced that its Board of Directors approved an additional common stock repurchase program under which the Company may purchase shares of its outstanding common stock up to an aggregate transactional value of $500, depending on the Company’s continuing analysis of market, financial, and other factors (the July 2022 authorization). Prior to this authorization, $150 remained available for common stock repurchases at the end of the second quarter of 2022 from the prior authorization in October 2021 of $500 which was fully exhausted in 2022 with the Company’s repurchase activity (see below). No shares were repurchased in 2023. In 2022, the Company repurchased 8,565,200 shares of its common stock for $500; the shares were immediately retired. 67 In 2021, the Company repurchased 3,184,300 shares of its common stock for $150; the shares were immediately retired. As of the date of this report, the Company is currently authorized to repurchase up to a total of $500, in the aggregate, of its outstanding shares of common stock under the July 2022 authorization. Repurchases under this program may be made using a variety of methods, which may include open market purchases, privately negotiated transactions, or pursuant to a Rule 10b5-1 plan. This program may be suspended or discontinued at any time and does not have a predetermined expiration date. Alcoa Corporation intends to retire repurchased shares of common stock. Investing Activities Cash used for investing activities was $585 in 2023 compared to cash used for investing activities of $495 in 2022. In 2023, the use of cash was primarily attributable to $531 related to capital expenditures and $70 of cash contributions to the ELYSISTM partnership. In 2022, the use of cash was primarily attributable to $480 related to capital expenditures and $32 of cash contributions to the ELYSIS partnership, partially offset by the sale of the Company’s interest in the MRN mine of $10. In 2024, Alcoa expects capital expenditures of approximately $550 related to sustaining capital projects and return-seeking capital projects. The timing and amount of capital expenditures may fluctuate as a result of the Company’s normal operations. Material Cash Requirements As discussed above, the Company relies primarily on operating cash flows to fund its cash commitments and management believes its cash on hand, projected cash flows, and liquidity options combined with its strategic actions, will be adequate to fund its short-term (at least 12 months) and long-term operating and investing needs. On January 24, 2024, ANHBV drew $201 against the Japanese Yen Revolving Credit Facility to fund working capital requirements and reductions to date in the Company’s Cash and cash equivalents. The Company plans to opportunistically access liquidity sources to support its cash position and ongoing cash needs. The Company has committed cash outflows related to pension and postretirement benefit obligations, asset retirement obligations, environmental remediation, and operating lease agreements. See Part II Item 8 of this Form 10-K in Notes O, R, S, and T, respectively, to the Consolidated Financial Statements for additional information. As of December 31, 2023, a summary of Alcoa Corporation’s outstanding material cash requirements are as follows: Operating activities: Energy-related purchase obligations Raw material purchase obligations Other purchase obligations Interest related to debt Financing activities: Long-term debt and Short-term borrowings Totals Total 2024 2025-2026 2027-2028 Thereafter $ $ $ 13,997 4,720 1,429 422 $ 1,420 1,874 658 98 $ 2,542 884 258 185 $ 2,298 500 185 129 7,737 1,462 328 10 1,888 22,456 $ 135 4,185 $ 2 3,871 $ 1,250 4,362 $ 501 10,038 Purchase obligations—Energy-related purchase obligations consist primarily of electricity and natural gas contracts with expiration dates ranging from 1 year to 24 years. Raw material obligations consist mostly of bauxite (relates to AWAC’s bauxite mine interests in Guinea and Brazil), caustic soda, lime, alumina, aluminum fluoride, calcined petroleum coke, anodes, and cathode blocks with expiration dates ranging from less than 1 year to 11 years. Other purchase obligations consist principally of freight for bauxite and alumina with expiration dates ranging from 1 to 11 years. Many of these purchase obligations contain variable pricing components, and, as a result, actual cash payments may differ from the estimates provided in the preceding table. In accordance with the terms of several of these supply contracts, obligations may be reduced as a result of an interruption to operations, such as a plant curtailment or a force majeure event. Interest related to total debt—Interest is based on interest rates in effect as of December 31, 2023 and is calculated on debt with maturities that extend to 2029. Long-term debt and Short-term borrowings—Total debt amounts in the preceding table represent the principal amounts of all outstanding long-term debt and Short-term borrowings, which have maturities that extend to 2029. 68 Critical Accounting Policies and Estimates The preparation of the Company’s Consolidated Financial Statements in accordance with GAAP requires management to make certain estimates based on judgments and assumptions regarding uncertainties that affect the amounts reported in the Consolidated Financial Statements and disclosed in the Notes to the Consolidated Financial Statements. Areas that require such estimates include the review of properties, plants, and equipment and goodwill for impairment, and accounting for each of the following: asset retirement and environmental obligations; litigation matters; pension plans and other postretirement benefits obligations; derivatives and hedging activities; and income taxes. Management uses historical experience and all available information to make these estimates; actual results may differ from those used to prepare the Company’s Consolidated Financial Statements at any given time. Despite these inherent limitations, management believes that the amounts recorded in the financial statements related to these items are based on its best estimates and judgments using all relevant information available at the time. A summary of the Company’s significant accounting policies is included in Part II Item 8 of this Form 10-K in Note B to the Consolidated Financial Statements. Properties, Plants, and Equipment. Properties, plants, and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets (asset group) may not be recoverable, including in the period when assets have met the criteria to be classified as held for sale. The model used to determine recoverability of an asset or asset group would leverage the model that management uses for planning and strategic review of the entire business, including related inputs and assumptions. Management’s impairment assessment process is described in Part II Item 8 of this Form 10-K in Note B to the Consolidated Financial Statements. Refer to Part II Item 8 of this Form 10-K in Note K to the Consolidated Financial Statements for more information regarding properties, plants, and equipment. Goodwill. Goodwill is reviewed for impairment annually (in the fourth quarter) or more frequently if indicators of impairment exist or if a decision is made to sell or exit a business. A significant amount of judgment is involved in determining if an indicator of impairment has occurred. Such indicators may include, among others, deterioration in general economic conditions, negative developments in equity and credit markets, adverse changes in the markets in which an entity operates, increases in input costs that have a negative effect on earnings and cash flows, or a trend of negative or declining cash flows over multiple periods. The fair value that could be realized in an actual transaction may differ from that used to evaluate goodwill for impairment. Under the qualitative impairment test, management considers a number of factors in its assessment, such as: general economic conditions, equity and credit markets, industry and market conditions, and earnings and cash flow trends. Under the quantitative impairment test, management uses a discounted cash flow (DCF) model to estimate the current fair value of its reporting units. A number of significant assumptions and estimates are involved in the application of the DCF model to forecast operating cash flows, including markets and market share, sales volumes and prices, production costs, production capability, tax rates, capital spending, discount rate, and working capital changes. The model used for the goodwill impairment test leverages the model, including related inputs and assumptions, that management uses for planning and strategic review of the entire business. Management will test goodwill on a qualitative or quantitative basis. Refer to Part II Item 8 of this Form 10-K in Note B to the Consolidated Financial Statements for more information regarding management’s impairment assessment process. As a result of the January 2023 segment change, the Company reviewed the recoverability of the carrying value of goodwill of its Alumina reporting unit in the first quarter of 2023. The estimated fair value of the Alumina reporting unit substantially exceeded the reporting unit’s carrying value, resulting in no impairment. Management performed a quantitative assessment for the Alumina reporting unit in the fourth quarter of 2023. As a result of the assessment, the estimated fair value of the Alumina reporting unit was substantially in excess of its carrying value, resulting in no impairment. The impact on the estimated fair values of an increase in the discount rate of 1% would not result in a change in the conclusions reached for the impairment assessments performed in 2023, the estimated fair values would remain in excess of carrying values. Further, in all years presented, there have been no triggering events that necessitated an impairment test for the Alumina reporting unit, except for the segment change in the first quarter of 2023 described above. Refer to Part II Item 8 of this Form 10-K in Note L to the Consolidated Financial Statements for more information regarding goodwill. 69 Asset Retirement and Environmental Obligations. Estimates are used to record environmental remediation and asset retirement obligation (ARO) reserves based on the best available information at the time of recognition. Several assumptions are used to estimate the costs required to demolish, environmentally remediate, reclaim, or restore the site, including: • Engineering designs for construction or closure; • Materials and services costs; • Volume of regulated materials to be removed (asbestos, PCB fluids, spent potlining); • Disposition of demolition materials; • Extent of contamination based on available data; • Scope of remediation to mitigate human health or environmental risks and/or to meet regulatory requirements; • Timing to complete construction or closure; and, • Commercial availability and pricing for off-site treatment or disposal applications. As the site is demolished, remediated, reclaimed, or restored, the assumptions and estimates used to record the reserve may change to account for: • Actual site conditions that require more or less remediation or reclamation; • Legislation that becomes more or less stringent; • Regulative authorities requiring updates to final design prior to completion; • Alternative disposal methods for demolition waste; • Technological changes which allow remediation to be more efficient; • Market factors; and, • Variances in work that is atypical from prior work experience. Changes to the estimates may result in material changes to the reserve that may require an increase to or a reversal of a previously recorded reserve. Refer to Part II Item 8 of this Form 10-K in Note R and Note S to the Consolidated Financial Statements for more information regarding current reserves. Litigation Matters. For asserted claims and assessments, liabilities are recorded when an unfavorable outcome of a matter is deemed to be probable and the loss is reasonably estimable. Management determines the likelihood of an unfavorable outcome based on many factors such as, among others, the nature of the matter, available defenses and case strategy, progress of the matter, views and opinions of legal counsel and other advisors, applicability and success of appeals processes, and the outcome of similar historical matters. Once an unfavorable outcome is deemed probable, management weighs the probability of estimated losses, and the most reasonable loss estimate is recorded. If an unfavorable outcome of a matter is deemed to be reasonably possible, then the matter is disclosed, and no liability is recorded. With respect to unasserted claims or assessments, management must first determine that the probability that an assertion will be made is likely, then, a determination as to the likelihood of an unfavorable outcome and the ability to reasonably estimate the potential loss is made. Legal matters are reviewed on a continuous basis to determine if there has been a change in management’s judgment regarding the likelihood of an unfavorable outcome or the estimate of a potential loss. Refer to Part II Item 8 of this Form 10-K in Note B to the Consolidated Financial Statements for more information regarding management’s litigation matters policy. Pension and Other Postretirement Benefits. Liabilities and expenses for pension and other postretirement benefits are determined using actuarial methodologies and incorporate significant assumptions, including the interest rate used to discount the future estimated liability, the expected long-term rate of return on plan assets, and several assumptions relating to the employee workforce (salary increases, health care cost trend rates, retirement age, and mortality). The yield curve model used to develop the discount rate parallels the plans’ projected cash flows and has a weighted average duration of 10 years. The underlying cash flows of the high-quality corporate bonds included in the model exceed the cash flows needed to satisfy the Company’s plan obligations multiple times. If a deep market of high-quality corporate bonds does not exist in a country, then the yield on government bonds plus a corporate bond yield spread is used. The impact of a change in the weighted average discount rate of ¼ of 1% would be approximately $70 on combined pension and other postretirement liabilities and immaterial to pretax earnings in the following year. The expected long-term rate of return on plan assets is generally applied to a five-year market-related value of plan assets (a four-year average or the fair value at the plan measurement date is used for certain non-U.S. plans). The process used by management to develop this assumption is one that relies on forward-looking investment returns by asset class. Management incorporates expected future investment returns on current and planned asset allocations using information from various external investment managers and consultants, as well as management’s own judgment. A change in the assumption for the weighted average expected long-term rate of return on plan assets of ¼ of 1% would impact pretax earnings by approximately $6 for 2024. 70 Mortality rate assumptions are based on mortality tables and future improvement scales published by third parties, such as the Society of Actuaries, and consider other available information including historical data as well as studies and publications from reputable sources. Refer to Part II Item 8 of this Form 10-K in Note O to the Consolidated Financial Statements for more information regarding pension and other postretirement benefits including accounting impacts of current year actions. Derivatives and Hedging. To calculate the fair value of certain derivatives, management uses discounted cash flow (DCF) and other simulation models that consider the following inputs and assumptions: quoted market prices (e.g., aluminum prices on the 10-year London Metal Exchange (LME) forward curve and energy prices), information concerning time premiums and volatilities for certain option type embedded derivatives and regional premiums for aluminum contracts, aluminum and energy prices beyond those quoted in the market, and the estimated credit spread between Alcoa and the counterparty. The quoted market prices used in the valuation models are dependent on market fundamentals, the relationship between supply and demand at any point in time, seasonal conditions, inventories, and interest rates. For periods beyond the term of quoted market prices, management estimates the price of aluminum by extrapolating the 10-year LME forward curve and estimates the Midwest premium based on recent transactions. Changes in estimates can have a material impact on the derivative valuations. Refer to Part II Item 8 of this Form 10-K in Note P to the Consolidated Financial Statements for more information regarding derivatives and hedging and related activity during the period. Income Taxes. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management applies judgment in assessing all available positive and negative evidence and considers all potential sources of taxable income, including income available in carryback periods, future reversals of taxable temporary differences, projections of taxable income, and income from tax planning strategies. Positive evidence includes factors such as a history of profitable operations, projections of future profitability within the carryforward period, including from tax planning strategies, and Alcoa Corporation’s experience with similar operations. Existing favorable contracts and the ability to sell products into established markets are additional positive evidence. Negative evidence includes items such as cumulative losses, projections of future losses, or carryforward periods that are not long enough to allow for the utilization of a deferred tax asset based on existing projections of income. In certain jurisdictions, deferred tax assets related to cumulative losses may exist without a valuation allowance where in management’s judgment the weight of the positive evidence more than offsets the negative evidence of the cumulative losses. Upon changes in facts and circumstances, management may conclude that deferred tax assets for which no valuation allowance is currently recorded may not be realized, resulting in a future charge to establish a valuation allowance. Financial information utilized in this analysis leverages the same financial information, including related inputs and assumptions, that management uses for planning and strategic review of the entire business. Tax benefits related to uncertain tax positions taken or expected to be taken on a tax return are recorded when such benefits meet a more likely than not threshold. Otherwise, these tax benefits are recorded when a tax position has been effectively settled, which means that the statute of limitations has expired, or the appropriate taxing authority has completed their examination even though the statute of limitations remains open. Changes in estimates can have a material impact on the deferred taxes and uncertain tax positions. Refer to Part II Item 8 of this Form 10-K in Note Q to the Consolidated Financial Statements for more information regarding income taxes and deferred tax assets and related activity during the period. Related Party Transactions Alcoa Corporation buys products from and sells products to various related companies, consisting of entities in which Alcoa Corporation retains a 50% or less equity interest, at negotiated prices between the two parties. These transactions were not material to the financial position or results of operations of Alcoa Corporation for all periods presented. Recently Adopted Accounting Guidance See Part II Item 8 of this Form 10-K in Note B to the Consolidated Financial Statements under caption Recently Adopted Accounting Guidance. Recently Issued Accounting Guidance See Part II Item 8 of this Form 10-K in Note B to the Consolidated Financial Statements under caption Recently Issued Accounting Guidance. Item 7A. Quantitative and Qualitative Disclosures About Market Risk. See Part II Item 8 of this Form 10-K in Note P to the Consolidated Financial Statements under caption Derivatives. 71 Item 8. Financial Statements and Supplementary Data. Management’s Report on Financial Statements and Practices Management’s Reports to Alcoa Corporation Stockholders The accompanying Consolidated Financial Statements of Alcoa Corporation and its subsidiaries (the Company) were prepared by management, which is responsible for their integrity and objectivity, in accordance with accounting principles generally accepted in the United States of America (GAAP) and include amounts that are based on management’s best judgments and estimates. The other financial information included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 is consistent with that in the Consolidated Financial Statements. Management recognizes its responsibility for conducting the Company’s affairs according to the highest standards of personal and corporate conduct. This responsibility is characterized and reflected in key policy statements issued from time to time regarding, among other things, conduct of its business activities within the laws of the host countries in which the Company operates and potentially conflicting outside business interests of its employees. The Company maintains a systematic program to assess compliance with these policies. Management’s Report on Internal Control over Financial Reporting Management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) of the U.S. Securities Exchange Act of 1934 (as amended), for the Company. The Company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. The Company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company, (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company, and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the Company’s assets that could have a material effect on the financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. Management conducted an assessment to evaluate the effectiveness of the Company’s internal control over financial reporting as of December 31, 2023 using the criteria in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, management concluded that the Company maintained effective internal control over financial reporting as of December 31, 2023. PricewaterhouseCoopers LLP, the independent registered public accounting firm that audited the Company’s financial statements included in this Annual Report on Form 10-K for the year ended December 31, 2023, has audited the Company’s internal control over financial reporting as of December 31, 2023 and has issued an attestation report, which is included herein. /s/ William F. Oplinger William F. Oplinger President and Chief Executive Officer /s/ Molly S. Beerman Molly S. Beerman Executive Vice President and Chief Financial Officer February 21, 2024 72 Report of Independent Registered Public Accounting Firm To the Board of Directors and Shareholders of Alcoa Corporation Opinions on the Financial Statements and Internal Control over Financial Reporting We have audited the accompanying consolidated balance sheets of Alcoa Corporation and its subsidiaries (the “Company”) as of December 31, 2023 and 2022, and the related consolidated statements of operations, comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2023, including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company’s internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control—Integrated Framework (2013) issued by the COSO. Basis for Opinions The Company’s management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company’s internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions. Definition and Limitations of Internal Control over Financial Reporting A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. 73 Critical Audit Matters The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates. Asset Retirement Obligations – Mine Reclamation and Closure of Bauxite Residue Areas As described in Notes B and R to the consolidated financial statements, the Company recognizes asset retirement obligations (AROs) related to legal obligations associated with the standard operation of bauxite mines, alumina refineries, and aluminum smelters. For the bauxite mines and alumina refineries, the AROs consist primarily of costs associated with mine reclamation and closure of bauxite residue areas, respectively. The fair values of the AROs are recorded on a discounted basis at the time the obligation is incurred and accreted over time for the change in present value; related accretion is recorded as a component of cost of goods sold. Additionally, the Company capitalizes asset retirement costs by increasing the carrying amount of the related long-lived assets and depreciating the assets over their remaining useful life. As disclosed by management, estimates are used to record AROs based on the best available information at the time of recognition. Several assumptions are used to estimate the cost required for reclamation and restoration of the site including: engineering designs for construction or closure, materials and services costs, regulatory requirements, and timing to complete construction or closure. As of December 31, 2023, the Company had $989 million in AROs, of which $328 million related to mine reclamation and $437 million related to the closure of bauxite residue areas. During 2023, the Company incurred liabilities related to mine reclamation and closure of bauxite residue areas, consisting of $97 million for changes in closure estimates of operating bauxite residue areas, $87 million for new mining areas opened during the year and higher estimated mine reclamation costs, and $10 million related to changes in closure estimates of non-operating bauxite residue areas. The principal considerations for our determination that performing procedures relating to the AROs for mine reclamation and closure of bauxite residue areas is a critical audit matter are (i) the significant judgment by management in developing the fair value estimate of the AROs; (ii) a high degree of auditor judgement, subjectivity, and effort in performing procedures and evaluating management’s significant assumptions related to the engineering designs for construction or closure, materials and services costs, regulatory requirements, and timing to complete construction or closure; (collectively “management’s assumptions”); and (iii) the audit effort involved the use of professionals with specialized skill and knowledge. Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to management’s accounting for AROs, including controls over management’s methodology, assumptions, and valuation of the AROs for mine reclamation and closure of bauxite residue areas. These procedures also included, among others, (i) testing management’s process for developing the fair value estimate of the AROs for mine reclamation and closure of bauxite residue areas; (ii) evaluating the appropriateness of the methodologies used by management, (iii) testing the completeness and accuracy of underlying data used in the methodologies, and (iv) evaluating the reasonableness of management’s assumptions described above. Evaluating management’s assumptions involved (i) evaluating the cost of rehabilitation and restoration of a site, including comparing the cost assumptions used, on a sample basis, to comparable data from external parties and internal source data; (ii) evaluating the consistency of management’s assumptions across mine and bauxite residue areas, as applicable; (iii) the identification of circumstances which may require a modification to a previous estimate; (iv) physically observing the progress of the mine reclamation; (vi) evaluating management’s application of and compliance with regulatory requirements; and (vii) evaluating whether the assumptions were consistent with evidence obtained in other areas of the audit. Professionals with specialized skill and knowledge were used to assist in (i) evaluating the appropriateness of the methodology used by management for closure of bauxite residue areas; (ii) evaluating the reasonableness of the application of and compliance with regulatory requirements for closure of bauxite residue areas; and (iii) evaluating the reasonableness of management’s estimate of AROs for closure of bauxite residue areas by developing an independent estimate of the costs included in AROs for a sample of bauxite residue areas, using independently determined assumptions, and comparing the independent estimate of the costs to management’s estimate. /s/ PricewaterhouseCoopers LLP Pittsburgh, Pennsylvania February 21, 2024 We have served as the Company’s auditor since 2015. 74 Alcoa Corporation and Subsidiaries Statement of Consolidated Operations (in millions, except per-share amounts) For the year ended December 31, Sales (E) Cost of goods sold (exclusive of expenses below) Selling, general administrative, and other expenses Research and development expenses Provision for depreciation, depletion, and amortization Restructuring and other charges, net (D) Interest expense (U) Other expenses (income), net (U) Total costs and expenses (Loss) income before income taxes Provision for income taxes (Q) Net (loss) income Less: Net (loss) income attributable to noncontrolling interest Net (loss) income attributable to Alcoa Corporation Earnings per share attributable to Alcoa Corporation common shareholders (F): Basic Diluted $ 2023 2022 2021 $ 10,551 9,813 226 39 632 184 107 134 11,135 (584) 189 (773) (122) (651) $ 12,451 10,212 204 32 617 696 106 (118) 11,749 702 664 38 161 (123) 12,152 9,153 227 31 664 1,128 195 (445) 10,953 1,199 629 570 141 429 $ $ (3.65) (3.65) $ $ (0.68) (0.68) $ $ 2.30 2.26 The accompanying notes are an integral part of the consolidated financial statements. 75 Alcoa Corporation and Subsidiaries Statement of Consolidated Comprehensive Income (in millions) Alcoa Corporation 2022 2021 2023 Noncontrolling interest 2022 2023 2021 2023 Total 2022 $ (651) $ (123) $ 429 $ (122) $ 161 $ 141 $ (773) $ 38 2021 $ 570 (62) 944 1,654 (10) 8 54 (72) 952 1,708 92 (71) (229) 57 (103) (93) 149 (174) (322) (136) 180 (388) (1) 2 — (137) (106) (757) $ 1,053 930 1,037 $ 1,466 $ 46 (76) $ (93) 68 $ (39) 102 $ (60) (833) $ 182 960 998 (388) 998 $ 1,568 For the year ended December 31, Net (loss) income Other comprehensive (loss) income, net of tax (G): Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits Foreign currency translation adjustments Net change in unrecognized gains/losses on cash flow hedges Total Other comprehensive (loss) income, net of tax Comprehensive (loss) income $ The accompanying notes are an integral part of the consolidated financial statements. 76 Alcoa Corporation and Subsidiaries Consolidated Balance Sheet (in millions) 2023 2022 December 31, Assets Current assets: Cash and cash equivalents (P) Receivables from customers (I) Other receivables Inventories (J) Fair value of derivative instruments (P) Prepaid expenses and other current assets Total current assets Properties, plants, and equipment, net (K) Investments (H) Deferred income taxes (Q) Fair value of derivative instruments (P) Other noncurrent assets (U) Total Assets Liabilities Current liabilities: Accounts payable, trade Accrued compensation and retirement costs Taxes, including income taxes Fair value of derivative instruments (P) Other current liabilities Long-term debt due within one year (M & P) Total current liabilities Long-term debt, less amount due within one year (M & P) Accrued pension benefits (O) Accrued other postretirement benefits (O) Asset retirement obligations (R) Environmental remediation (S) Fair value of derivative instruments (P) Noncurrent income taxes (Q) Other noncurrent liabilities and deferred credits (U) Total liabilities Contingencies and commitments (S) Equity Alcoa Corporation shareholders’ equity: Common stock (N) Additional capital Accumulated deficit Accumulated other comprehensive loss (G) Total Alcoa Corporation shareholders’ equity Noncontrolling interest (A) Total equity Total Liabilities and Equity $ $ $ $ $ $ $ 944 656 152 2,158 29 466 4,405 6,785 979 333 3 1,650 14,155 1,714 357 88 214 578 79 3,030 1,732 278 443 772 202 1,092 193 568 8,310 2 9,187 (1,293) (3,645) 4,251 1,594 5,845 14,155 $ 1,363 778 131 2,427 134 417 5,250 6,493 1,122 296 2 1,593 14,756 1,757 335 230 200 481 1 3,004 1,806 213 480 711 226 1,026 215 486 8,167 2 9,183 (570) (3,539) 5,076 1,513 6,589 14,756 The accompanying notes are an integral part of the consolidated financial statements. 77 Alcoa Corporation and Subsidiaries Statement of Consolidated Cash Flows (in millions) For the year ended December 31, Cash from Operations Net (loss) income Adjustments to reconcile net (loss) income to cash from operations: Depreciation, depletion, and amortization Deferred income taxes (Q) Equity loss (income), net of dividends (H) Restructuring and other charges, net (D) Net loss (gain) from investing activities—asset sales (U) Net periodic pension benefit cost (O) Stock-based compensation (N) Premium paid on early redemption of debt Loss (gain) on mark-to-market derivative financial contracts Other Changes in assets and liabilities, excluding effects of divestitures and foreign currency translation adjustments: Decrease (increase) in receivables Decrease (increase) in inventories (J) Decrease (increase) in prepaid expenses and other current assets (Decrease) increase in accounts payable, trade Decrease in accrued expenses (Decrease) increase in taxes, including income taxes Pension contributions (O) Increase in noncurrent assets Decrease in noncurrent liabilities Cash provided from operations Financing Activities Additions to debt (M) Payments on debt (M) Proceeds from the exercise of employee stock options (N) Repurchase of common stock (N) Dividends paid on Alcoa common stock (N) Payments related to tax withholding on stock-based compensation awards Financial contributions for the divestiture of businesses (C) Contributions from noncontrolling interest (A) Distributions to noncontrolling interest Other Cash provided from (used for) financing activities Investing Activities Capital expenditures Proceeds from the sale of assets and businesses (C) Additions to investments (H) Sale of investments (H) Other Cash (used for) provided from investing activities Effect of exchange rate changes on cash and cash equivalents and restricted cash Net change in cash and cash equivalents and restricted cash Cash and cash equivalents and restricted cash at beginning of year Cash and cash equivalents and restricted cash at end of 2023 2022 2021 $ (773) $ 38 $ 570 632 (22) 201 184 18 6 35 — 26 78 104 243 39 (74) (133) (146) (24) (210) (93) 91 127 (72) 1 — (72) (34) (52) 188 (30) 1 57 (531) 4 (70) — 12 (585) 10 (427) 1,474 617 219 4 696 10 54 40 — (44) 53 (59) (547) 44 189 (173) (152) (17) (87) (63) 822 4 (1) 22 (500) (72) (19) (33) 214 (379) (4) (768) (480) 5 (32) 10 2 (495) (9) (450) 1,924 664 147 (138) 1,128 (354) 47 39 43 (24) 49 (414) (639) (41) 354 (38) 301 (579) (160) (35) 920 495 (1,294) 25 (150) (19) (1) (17) 21 (215) (3) (1,158) (390) 966 (11) — — 565 (13) 314 1,610 year $ 1,047 $ 1,474 $ 1,924 The accompanying notes are an integral part of the consolidated financial statements. 78 Alcoa Corporation and Subsidiaries Statement of Changes in Consolidated Equity (in millions) Alcoa Corporation shareholders Common stock Additional capital Accumulated deficit Accumulated other comprehensive (loss) income Noncontrolling interest Total equity Balance at December 31, 2020 Net income Other comprehensive income (loss) (G) Stock-based compensation (N) Net effect of tax withholding for compensation plans and exercise of stock options (N) Repurchase of common stock (N) Dividends paid on Alcoa common stock ($0.10 per share) (N) Contributions Distributions Other Balance at December 31, 2021 Net (loss) income Other comprehensive income (loss) (G) Stock-based compensation (N) Net effect of tax withholding for compensation plans and exercise of stock options (N) Repurchase of common stock (N) Dividends paid on Alcoa common stock ($0.10 per share) (N) Contributions Distributions Other Balance at December 31, 2022 Net loss Other comprehensive (loss) income (G) Stock-based compensation (N) Net effect of tax withholding for compensation plans and exercise of stock options (N) Dividends paid on Alcoa common stock ($0.10 per share) (N) Contributions Distributions Other Balance at December 31, 2023 $ $ 2 — — — — — — — — — 2 — — — — — — — — — 2 — — — — — — — — 2 $ $ 9,663 — — 39 (725) $ 429 — — (5,629) $ — 1,037 — $ 1,705 141 (39) — 25 (150) — — — — 9,577 — — 40 3 (440) — — — 3 9,183 — — 35 — — (19) — — — (315) (123) — — — (60) (72) — — — (570) (651) — — (33) — — — — 2 9,187 $ (72) — — — (1,293) $ $ — — — — — — (4,592) — 1,053 — — — — — — — (3,539) — (106) — — — — — — (3,645) $ — — — 21 (215) (1) 1,612 161 (93) — — — — 214 (379) (2) 1,513 (122) 46 — — — 188 (30) (1) 1,594 $ The accompanying notes are an integral part of the consolidated financial statements. 5,016 570 998 39 25 (150) (19) 21 (215) (1) 6,284 38 960 40 3 (500) (72) 214 (379) 1 6,589 (773) (60) 35 (33) (72) 188 (30) 1 5,845 79 Alcoa Corporation and subsidiaries Notes to the Consolidated Financial Statements (dollars in millions, except per-share amounts; metric tons in thousands (kmt)) A. Basis of Presentation Alcoa Corporation (or the Company) is a vertically integrated aluminum company comprised of bauxite mining, alumina refining, aluminum production (smelting and casting), and energy generation. Through direct and indirect ownership, the Company has 27 operating locations in nine countries around the world, situated primarily in Australia, Brazil, Canada, Iceland, Norway, Spain, and the United States. Alcoa Corporation became an independent, publicly traded company on November 1, 2016, following its separation (the Separation Transaction) from its former parent company, Alcoa Inc. References herein to “ParentCo” refer to Alcoa Inc. and its consolidated subsidiaries through October 31, 2016, at which time it was renamed Arconic Inc. (Arconic) and since has been subsequently renamed Howmet Aerospace Inc. Basis of Presentation. The Consolidated Financial Statements of Alcoa Corporation are prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). In accordance with GAAP, certain situations require management to make estimates based on judgments and assumptions, which may affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements. They also may affect the reported amounts of revenues and expenses during the reporting periods. Management uses historical experience and all available information to make these estimates. Management regularly evaluates the judgments and assumptions used in its estimates, and results could differ from those estimates upon future events and their effects or new information. Principles of Consolidation. The Consolidated Financial Statements of the Company include the accounts of Alcoa Corporation and companies in which Alcoa Corporation has a controlling interest, including those that comprise the Alcoa World Alumina & Chemicals (AWAC) joint venture (see below). Intercompany transactions have been eliminated. The equity method of accounting is used for investments in affiliates and other joint ventures over which the Company has significant influence but does not have effective control. Investments in affiliates in which Alcoa Corporation cannot exercise significant influence are accounted at cost less any impairment, a measurement alternative in accordance with GAAP. AWAC is an unincorporated global joint venture between Alcoa Corporation and Alumina Limited and consists of several affiliated operating entities, which own, have an interest in, or operate the bauxite mines and alumina refineries within the Company’s Alumina segment (except for the Poços de Caldas mine and refinery, portions of the São Luís refinery, and investment in Mineração Rio do Norte S.A. (MRN) until its sale in April 2022, all in Brazil) and a portion (55%) of the Portland smelter (Australia) within the Company’s Aluminum segment. Alcoa Corporation owns 60% and Alumina Limited owns 40% of these individual entities, which are consolidated by the Company for financial reporting purposes and include Alcoa of Australia Limited (AofA), Alcoa World Alumina LLC (AWA), Alcoa World Alumina Brasil Ltda. (AWAB), and Alúmina Española, S.A. (Española). Alumina Limited’s interest in the equity of such entities is reflected as Noncontrolling interest on the accompanying Consolidated Balance Sheet. Management evaluates whether an Alcoa Corporation entity or interest is a variable interest entity and whether the Company is the primary beneficiary. Consolidation is required if both of these criteria are met. Alcoa Corporation does not have any variable interest entities requiring consolidation. Related Party Transactions. Alcoa Corporation buys products from and sells products to various related companies, consisting of entities in which the Company retains a 50% or less equity interest, at negotiated prices between the two parties. These transactions were not material to the financial position or results of operations of Alcoa Corporation for all periods presented. B. Summary of Significant Accounting Policies Cash Equivalents. Cash equivalents are highly liquid investments purchased with an original maturity of three months or less. Restricted Cash. Restricted cash is included with Cash and cash equivalents when reconciling the Cash and cash equivalents and restricted cash at beginning of year and Cash and cash equivalents and restricted cash at end of year on the accompanying Statement of Consolidated Cash Flows. Current restricted cash amounts are reported in Prepaid expenses and other current assets on the accompanying Consolidated Balance Sheet. Noncurrent restricted cash amounts are reported in Other noncurrent assets on the accompanying Consolidated Balance Sheet (see Note U for a reconciliation of Cash and cash equivalents and restricted cash). Inventory Valuation. Inventories are carried at the lower of cost or net realizable value, with the cost of inventories principally determined under the average cost method. 80 Properties, Plants, and Equipment. Properties, plants, and equipment are recorded at cost. Interest related to the construction of qualifying assets is capitalized as part of the construction costs. Depreciation is recorded principally on the straight-line method over the estimated useful lives of the assets. Depreciation is recorded on temporarily idled facilities until such time management approves a permanent closure. The following table details the weighted average useful lives of structures and machinery and equipment by type of operation (numbers in years): Alumina Aluminum smelting and casting Energy generation Structures 29 37 33 Machinery and equipment 27 22 25 Repairs and maintenance are charged to expense as incurred while costs for significant improvements that add productive capacity or that extend the useful life are capitalized. Gains or losses from the sale of assets are generally recorded in Other expenses (income), net. Properties, plants, and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets (asset group) may not be recoverable. Recoverability of assets is determined by comparing the estimated undiscounted net cash flows of the operations related to the assets (asset group) to their carrying amount. An impairment loss would be recognized when the carrying amount of the assets (asset group) exceeds the fair value. The amount of the impairment loss to be recorded is calculated as the excess of the carrying value of the assets (asset group) over their fair value, with fair value determined using the best information available, which generally is a discounted cash flow (DCF) model. The determination of what constitutes an asset group, the associated estimated undiscounted net cash flows, and the estimated useful lives of assets also require significant judgments. Leases. The Company determines whether an arrangement is a lease at the inception of the arrangement based on the terms and conditions in the contract. A contract contains a lease if there is an identified asset which the Company has the right to control. Lease right-of-use (ROU) assets are included in Properties, plants, and equipment, net with the corresponding operating lease liabilities included within Other current liabilities and Other noncurrent liabilities and deferred credits on the accompanying Consolidated Balance Sheet. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. The Company uses its incremental borrowing rate at the commencement date in determining the present value of lease payments unless a rate is implicit in the lease. Lease terms include options to extend the lease when it is reasonably certain that those options will be exercised. Leases with an initial term of 12 months or less, including anticipated renewals, are not recorded on the Consolidated Balance Sheet. The Company made a policy election not to record any non-lease components of a lease agreement in the lease liability. Variable lease payments are not presented as part of the ROU asset or liability recorded at the inception of a contract. Lease expense for operating lease payments is recognized on a straight-line basis over the lease term. Equity Investments. Alcoa invests in a number of privately-held companies, primarily through joint ventures and consortia, which are accounted for using the equity method. The equity method is applied in situations where the Company has the ability to exercise significant influence, but not control, over the investee. Management reviews equity investments for impairment whenever certain indicators are present suggesting that the carrying value of an investment is not recoverable. Deferred Mining Costs. Alcoa incurs deferred mining costs during the development stage of a mine life cycle. Such costs include the construction of access and haul roads, detailed drilling and geological analysis to further define the grade and quality of the known bauxite, and overburden removal costs. These costs relate to sections of the related mines where the Company is currently extracting bauxite or preparing for production in the near term. These sections are outlined and planned incrementally and generally are mined over periods ranging from one to five years, depending on specific mine plans. The amount of geological drilling and testing necessary to determine the economic viability of the bauxite deposit being mined is such that the reserves are considered to be proven. Deferred mining costs are amortized on a units-of-production basis and included in Other noncurrent assets on the accompanying Consolidated Balance Sheet. Goodwill and Other Intangible Assets. Goodwill is not amortized but is reviewed for impairment annually (in the fourth quarter) or more frequently if indicators of impairment exist or if a decision is made to sell or exit a business. 81 Goodwill is allocated among and evaluated for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment. Beginning in January 2023, the Company changed its operating segments, by combining the Bauxite and Alumina segments, and reported its financial results in the following two segments: (i) Alumina and (ii) Aluminum (see Note E). The Company has three reporting units, of which two are included in the Aluminum segment (smelting/casting and energy generation). The remaining reporting unit is the Alumina segment. Of these three reporting units, only Alumina contains goodwill (see Note L). Goodwill is tested for impairment by assessing qualitative factors to determine whether it is more likely than not (greater than 50%) that the fair value of the reporting unit is less than its carrying amount or performing a quantitative assessment using a discounted cash flow model. If the qualitative assessment indicates a possible impairment, then a quantitative impairment test is performed to determine the fair value of the reporting unit using a discounted cash flow method. Otherwise, no further analysis is required. Under the quantitative assessment, the evaluation of impairment involves comparing the current fair value of each reporting unit to its carrying value, including goodwill. In the event the estimated fair value of a reporting unit is less than the carrying value, an impairment loss equal to the excess of the reporting unit’s carrying value over its fair value not to exceed the total amount of goodwill applicable to that reporting unit would be recognized. Alcoa’s policy for its annual review of goodwill is to perform the quantitative impairment test for its reporting unit containing goodwill at least once during every three-year period. Intangible assets with finite useful lives are amortized generally on a straight-line basis over the periods benefited. The following table details the weighted average useful lives of software and other intangible assets by type of operation (numbers in years): Alumina Aluminum smelting and casting Energy generation Software Other intangible assets 6 3 3 25 40 29 Asset Retirement Obligations. Alcoa recognizes asset retirement obligations (AROs) related to legal obligations associated with the standard operation of bauxite mines, alumina refineries, and aluminum smelters. These AROs consist primarily of costs associated with mine reclamation, closure of bauxite residue areas, spent pot lining and regulated waste materials disposal, and landfill closure. Additionally, costs are recorded as AROs upon management’s decision to permanently close and demolish certain structures and for any significant lease restoration obligations. The fair values of these AROs are recorded on a discounted basis at the time the obligation is incurred and accreted over time for the change in present value; related accretion is recorded as a component of Cost of goods sold. Additionally, the Company capitalizes asset retirement costs by increasing the carrying amount of the related long-lived assets and depreciating these assets over their remaining useful life. The fair values for AROs are determined using significant assumptions, including engineering designs for construction or closure, materials and services costs, regulatory requirements, volume of regulated material to be removed, disposition of demolition materials, and timing to complete construction or closure. Subsequent adjustments to estimates of previously established AROs for current operations are capitalized by increasing the carrying amount of the related long-lived assets and depreciating these assets over their remaining useful life. Adjustments to estimates of AROs for closed locations are charged to Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note R). Certain conditional asset retirement obligations related to alumina refineries, aluminum smelters, and energy generation facilities have not been recorded in the Consolidated Financial Statements due to uncertainties surrounding the ultimate settlement date. The fair value of these asset retirement obligations will be recorded when a reasonable estimate of the ultimate settlement date can be made. Environmental Matters. Environmental related expenditures for current operations are expensed as a component of Cost of goods sold or capitalized, as appropriate. Expenditures relating to existing conditions caused by past operations, generally for closed locations which will not contribute to future revenues, are charged to Restructuring and other charges, net. Liabilities are recorded when remediation costs are probable and can be reasonably estimated. In instances where the Company has ongoing monitoring and maintenance responsibilities, it is Alcoa’s policy to maintain a reserve equal to five years of expected costs. The liability is continuously reviewed and adjusted to reflect current remediation progress, rate and pricing changes, actual volumes of material requiring management, changes to the original assumptions regarding how the site was to be remediated, and other factors that may be relevant, including changes in technology or regulations. The estimates may also include costs related to other potentially responsible parties to the extent that Alcoa has reason to believe such parties will not fully pay their proportionate share. 82 Litigation Matters. For asserted claims and assessments, liabilities are recorded when an unfavorable outcome of a matter is deemed to be probable and the loss is reasonably estimable. With respect to unasserted claims or assessments, liabilities are recorded when the probability that an assertion will be made is likely, an unfavorable outcome of the matter is deemed to be probable, and the loss is reasonably estimable. Legal matters are reviewed on a continuous basis to determine if there has been a change in management’s judgment regarding the likelihood of an unfavorable outcome or the estimate of a potential loss. Legal costs, which are primarily for general litigation, environmental compliance, tax disputes, and general corporate matters, are expensed as incurred. Revenue Recognition. The Company recognizes revenue when it satisfies a performance obligation(s) in accordance with the provisions of a customer order or contract. This is achieved when control of the product has been transferred to the customer, which is generally determined when title, ownership, and risk of loss pass to the customer, all of which occurs upon shipment or delivery of the product. The shipping terms vary across all businesses and depend on the product, the country of origin, and the type of transportation. Accordingly, the sale of Alcoa’s products to its customers represent single performance obligations for which revenue is recognized at a point in time, except for the Company’s Energy product division in which the customer simultaneously receives and consumes electricity (see Note E). Revenue is based on the consideration the Company expects to receive in exchange for its products. Returns and other adjustments have not been material. Based on the foregoing, no significant judgment is required to determine when control of a product has been transferred to a customer. The Company considers shipping and handling activities as costs to fulfill the promise to transfer the related products. As a result, customer payments of shipping and handling costs are recorded as a component of revenue. Taxes collected (e.g., sales, use, value added, excise) from its customers related to the sale of its products are remitted to governmental authorities and excluded from Sales. Cost of goods sold. The Company includes the following in Cost of goods sold: operating costs of our two segments, excluding depreciation, depletion, and amortization, but including all production related costs: raw materials consumed; purchases of metal for consumption; conversion costs, such as labor, materials, and utilities; equity earnings of certain investments integral to the Company’s supply chain; and plant administrative expenses. Also included in Cost of goods sold are: costs related to the Transformation function, which focuses on the management of expenses and obligations of previously closed operations; pension and other postretirement benefit service cost for employees maintaining closed locations; purchases of bauxite from offtake or other supply agreements, alumina to satisfy customer commitments, and metal for trade; and other costs not included in the operating costs of the segments. Selling, general administrative, and other expenses. The Company includes the costs of corporate-wide functional support in Selling, general administrative, and other expenses. Such costs include: executive; sales; marketing; strategy; operations administration; finance; information technology; legal; human resources; and government affairs and communications. Stock-Based Compensation. Compensation expense for employee equity grants is recognized using the non-substantive vesting period approach, in which the expense is recognized ratably over the requisite service period based on the grant date fair value. Forfeitures are accounted for as they occur. The fair value of performance stock units containing a market condition is valued using a Monte Carlo valuation model. Determining the fair value at the grant date requires judgment, including estimates for the average risk- free interest rate, and volatility. These assumptions may differ significantly between grant dates because of changes in the actual results of these inputs that occur over time. As of January 1, 2021, the Company no longer grants stock options. Refer to Note N for more information regarding stock-based compensation. Pension and Other Postretirement Benefits. Alcoa sponsors several defined benefit pension plans and health care postretirement benefit plans. The Company recognizes on a plan-by-plan basis the net funded status of these pension and postretirement benefit plans as either an asset or a liability on its Consolidated Balance Sheet. The net funded status represents the difference between the fair value of each plan’s assets and the benefit obligation of the respective plan. The benefit obligation represents the present value of the estimated future benefits the Company currently expects to pay to plan participants based on past service. Unrecognized gains and losses related to the plans are deferred in Accumulated other comprehensive loss on the Consolidated Balance Sheet until amortized into earnings. The plan assets and benefit obligations are measured at the end of each year or more frequently, upon the occurrence of certain events such as a significant plan amendment, settlement, or curtailment. For interim plan remeasurements, it is the Company’s policy to record the related accounting impacts within the same quarter as the triggering event. Liabilities and expenses for pension and other postretirement benefits are determined using actuarial methodologies and incorporate significant assumptions, including the interest rate used to discount the future estimated liability, the expected long-term rate of return on plan assets, and several assumptions relating to the employee workforce (salary increases, health care cost trend rates, retirement age, and mortality). 83 The yield curve model used to develop the discount rate parallels the plans’ projected cash flows and has a weighted average duration of 10 years. The underlying cash flows of the high-quality corporate bonds included in the model exceed the cash flows needed to satisfy the Company’s plan obligations multiple times. If a deep market of high-quality corporate bonds does not exist in a country, then the yield on government bonds plus a corporate bond yield spread is used. The expected long-term rate of return on plan assets is generally applied to a five-year market-related value of plan assets (a four-year average or the fair value at the plan measurement date is used for certain non-U.S. plans). The process used by management to develop this assumption is one that relies on forward-looking investment returns by asset class. Management incorporates expected future investment returns on current and planned asset allocations using information from various external investment managers and consultants, as well as management’s own judgment. Mortality rate assumptions are based on mortality tables and future improvement scales published by third parties, such as the Society of Actuaries, and consider other available information including historical data as well as studies and publications from reputable sources. A change in one or a combination of these assumptions, or the effects of actual results differing from assumptions, could have a material impact on Alcoa’s projected benefit obligation. These changes or differences are recorded in Accumulated other comprehensive loss and are amortized into earnings as a component of the net periodic benefit cost (income) over the average future working lifetime or average remaining life expectancy, as appropriate, of the plan’s participants. One-time accounting impacts, such as curtailment and settlement losses (gains), are recognized immediately and are reclassified from Accumulated other comprehensive loss to Restructuring and other charges, net on the accompanying Statement of Consolidated Operations. Refer to Note O for more information regarding pension and other postretirement benefits including accounting impacts of current year actions. Derivatives and Hedging. Derivatives are held for purposes other than trading and are part of a formally documented risk management program. Alcoa accounts for hedges of firm customer commitments for aluminum as fair value hedges. The fair values of the derivatives and changes in the fair values of the underlying hedged items are reported as assets and liabilities in the Consolidated Balance Sheet. Changes in the fair values of these derivatives and underlying hedged items generally offset and are recorded each period in Sales, consistent with the underlying hedged item. The Company accounts for certain hedges of foreign currency exposures and certain forecasted transactions as cash flow hedges. The fair values of the derivatives are recorded as assets and liabilities in the Consolidated Balance Sheet. The changes in the fair values of these derivatives are recorded in Other comprehensive (loss) income and are reclassified to Sales, Cost of goods sold, or Other expenses (income), net in the period in which earnings are impacted by the hedged items or in the period that the transaction no longer qualifies as a cash flow hedge. These contracts cover the same periods as known or expected exposures, generally not exceeding five years. If no hedging relationship is designated, the derivative is marked to market through Other expenses (income), net. Cash flows from derivatives are recognized in the Statement of Consolidated Cash Flows in a manner consistent with the underlying transactions. Income Taxes. The provision for income taxes is determined using the asset and liability approach of accounting for income taxes. Under this approach, the provision for income taxes represents income taxes paid or payable (or received or receivable) for the current year plus the change in deferred taxes during the year. Deferred taxes represent the future tax consequences expected to occur when the reported amounts of assets and liabilities are recovered or paid, resulting from differences between the financial and tax bases of Alcoa’s assets and liabilities and are adjusted for changes in tax rates and tax laws when enacted. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not (greater than 50%) that a tax benefit will not be realized. In evaluating the need for a valuation allowance, management applies judgment in assessing all available positive and negative evidence and considers all potential sources of taxable income. Deferred tax assets for which no valuation allowance is recorded may not be realized upon changes in facts and circumstances, resulting in a future charge to establish a valuation allowance. Existing valuation allowances are re-examined under the same standards of positive and negative evidence. If it is determined that it is more likely than not that a deferred tax asset will be realized, the appropriate amount of the valuation allowance, if any, is released. Deferred tax assets and liabilities are also re-measured to reflect changes in underlying tax rates due to law changes and the granting and lapse of tax holidays. 84 Tax benefits related to uncertain tax positions taken or expected to be taken on a tax return are recorded when such benefits meet a more likely than not threshold. Otherwise, these tax benefits are recorded when a tax position has been effectively settled, which means that the statute of limitations has expired or the appropriate taxing authority has completed their examination even though the statute of limitations remains open. Interest and penalties related to uncertain tax positions are recognized as part of the provision for income taxes and are accrued in the period that such interest and penalties would be applicable under relevant tax law until such time that the related tax benefits are recognized. Foreign Currency. The local currency is the functional currency for Alcoa’s significant operations outside the United States, except for certain operations in Canada and Iceland, and a holding and trading company in the Netherlands, where the U.S. dollar is used as the functional currency. The determination of the functional currency for Alcoa’s operations is made based on the appropriate economic and management indicators. Where local currency is the functional currency, assets and liabilities are translated into U.S. dollars using period end exchange rates and income and expenses are translated using the average exchange rates for the reporting period. Unrealized foreign currency translation gains and losses are deferred in Accumulated other comprehensive loss on the Consolidated Balance Sheet. Recently Adopted Accounting Guidance. On January 1, 2023, the Company adopted Accounting Standard Update (ASU) No. 2022- 04 which requires a buyer in a supplier finance program to disclose qualitative and quantitative information about its supplier finance programs, including the key terms of the program, the amount of obligations outstanding at the end of the reporting period, a description of where those obligations are presented in the balance sheet, and effective January 1, 2024, a roll-forward of such amounts during the annual period. The adoption of this guidance resulted in enhanced disclosures regarding these programs (see Note V) and did not have a material impact on the Company's Consolidated Financial Statements. Recently Issued Accounting Guidance. In December 2023, the Financial Accounting Standards Board (FASB) issued ASU No. 2023-09 which includes changes to income tax disclosures, including greater disaggregation of information in the rate reconciliation and disclosure of taxes paid by jurisdiction. The guidance is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The adoption of this guidance will provide enhanced disclosures regarding income taxes and will not have a material impact on the Company’s financial statements. In November 2023, the FASB issued ASU No. 2023-07 which requires disclosure of significant segment expenses regularly provided to the chief operating decision maker (CODM), other segment items (not included in significant segment expenses for each reportable segment), the title and position of the CODM, and an explanation of how the CODM uses the reported measure of segment profit or loss to assess segment performance and allocate resources. The guidance is effective for fiscal years beginning after December 15, 2023 on an annual basis and beginning after December 15, 2024 on an interim basis. Early adoption is permitted. The adoption of this guidance will provide enhanced disclosures regarding reportable segments and will not have a material impact on the Company’s financial statements. C. Divestitures Rockdale Site During the fourth quarter of 2021, the Company completed the sale of land and industrial assets at the previously closed Rockdale smelter site in the state of Texas in a transaction valued at $240. Upon closing of the transaction, the Company received $230 in cash and recorded a net gain of $202 in Other expenses (income), net (pre- and after-tax; see Note U) on the Statement of Consolidated Operations. Eastalco Site During the second quarter of 2021, the Company completed the sale of land at the previously closed Eastalco smelter site in the state of Maryland in a transaction valued at $100. Upon closing of the transaction, the Company received $94 in cash and recorded a gain of $90 in Other expenses (income), net ($90 pre- and $89 after-tax; see Note U) on the Statement of Consolidated Operations. 85 Warrick Rolling Mill In March 2021, Alcoa completed the sale of its rolling mill located at Warrick Operations (Warrick Rolling Mill), an integrated aluminum manufacturing site near Evansville, Indiana (Warrick Operations), to Kaiser Aluminum Corporation (Kaiser) for total consideration of approximately $670, which included the assumption of $69 in other postretirement benefit liabilities. The Company recorded a net gain of $30 in Other expenses (income), net (pre- and after-tax, see Note U) on the Statement of Consolidated Operations. Upon the closing of the transaction, the Company recorded estimated liabilities for future site separation commitments and remaining transaction costs associated with the sales agreement. The Company recorded a charge of $17 and $8 in 2023 and 2022 in Other expenses (income), net, respectively, related to additional costs of existing site separation commitments. In 2023 and 2022, the Company spent $52 and $37 against the reserve, respectively. The remaining balance of $11 at December 31, 2023 is expected to be spent in 2024. The cash spent against the reserve is included in Cash provided from (used for) financing activities on the Statement of Consolidated Cash Flows. D. Restructuring and Other Charges, Net Restructuring and other charges, net were comprised of the following: Settlements and/or curtailments related to retirement benefits (O) Severance and employee termination costs Loss on divestitures Asset impairments Asset retirement obligations (R) Environmental remediation (S) Other Reversals of previously recorded charges Restructuring and other charges, net 2023 2022 2021 21 11 — 50 41 2721 36 (2) 184 $ $ 632 1 79 58 34 (7) (122) 696 $ $ 977 1 — 75 23 15 82 (45) 1,128 $ $ Severance and employee termination costs were recorded based on approved detailed action plans submitted by the operating locations that specified positions to be eliminated, benefits to be paid under existing severance plans, union contracts or statutory requirements, and the expected timetable for completion of the plans. 2023 Actions. In 2023, Alcoa Corporation recorded Restructuring and other charges, net, of $184 which were primarily comprised of the following components: • Non-cash settlement charges related to pension benefits (see Note O): o $21 related to the purchase of group annuity contracts to transfer approximately $235 of pension obligations and assets associated with defined benefit pension plans for approximately 530 Canadian retirees and beneficiaries; • Charges related to portfolio actions: o $101 for the permanent closure of the previously curtailed Intalco (Washington) smelter (see below); o $53 for the updated viability agreement for the San Ciprián (Spain) smelter; and, o $11 for employee termination and severance costs, primarily related to the Kwinana refinery productivity program (see below); • Other net charges: o $17 to record additional environmental and asset retirement related reserves at previously closed sites (see Note R and Note S); o $19 benefit for the sale of unused carbon credits at a previously closed site; o $1 to record additional asset retirement related reserves at Warrick Operations (Indiana) (see Note R); and, o $1 for additional take-or-pay contract costs related to the closed Wenatchee (Washington) and Intalco smelters; • Reversals: o $2 due to lower costs for demolition and remediation at previously closed sites (see Note R). In December 2023, Alcoa began the closure of a line at its Warrick Operations site in Indiana that had not operated since 2016 to allow for future capital investments to improve casting capabilities. The Company recorded a charge of $1 in Restructuring and other charges, net on the Statement of Consolidated Operations to establish reserves related to demolition obligations. Additionally, Alcoa recorded $1 in Cost of goods sold on the Statement of Consolidated Operations to write-off the remaining net book value of related inventory. 86 In September 2023, the Company initiated productivity programs across its operations in Australia to mitigate the financial impacts of lower grade bauxite and to optimize operating levels. In connection with this program, the Company recorded Restructuring and other charges, net of $6 for employee termination and severance costs for approximately 90 employees at the Kwinana refinery. The restructuring action and associated cash outlays are anticipated to be complete by the end of the second quarter of 2024. In 2023, the Company spent $1 against the reserve. In March 2023, Alcoa Corporation announced the closure of the Intalco aluminum smelter, which had been fully curtailed since 2020. The Company recorded charges of $117 related to the closure, including a charge of $16 in Cost of goods sold on the Statement of Consolidated Operations to write-down remaining inventories to net realizable value and a charge of $101 in Restructuring and other charges, net on the Statement of Consolidated Operations. The restructuring charges were comprised of asset impairments of $50, environmental and demolition obligation reserves of $50, and severance and employee termination costs of $1 for the separation of approximately 12 employees. Cash outlays related to the permanent closure of the site in 2024 and 2025 are expected to be approximately $54 related to environmental and demolition obligation reserves, $4 of which was reserved for in prior periods, and $31 related to holding costs during the closure. At December 31, 2023, the separation of employees associated with this program was complete with $1 of payments made against the severance and employee termination cost reserve. In February 2023, the Company reached an updated viability agreement with the workers’ representatives of the San Ciprián smelter to commence the restart process in phases beginning in January 2024. The smelter was curtailed in January 2022 as a result of an agreement reached with the workers’ representatives in December 2021 (see below). Under the terms of the updated viability agreement, the Company is responsible for certain employee obligations during 2023 through 2025 and made commitments for capital improvements of $78. The Company recorded charges of $53 in Restructuring and other charges, net on the Statement of Consolidated Operations to establish the related reserve for employee obligations in 2023. Cash outlays related to these obligations were $7 in 2023 and the remainder is expected in 2024 and 2025. At December 31 2023, the Company has restricted cash of $91 to be made available for remaining capital improvement commitments at the site of $118 and smelter restart costs of $35 (see below). Restricted cash is included in Prepaid expenses and other current assets and Other noncurrent assets on the Consolidated Balance Sheet (see Note U). 2022 Actions. In 2022 Alcoa Corporation recorded Restructuring and other charges, net, of $696 which were primarily comprised of the following components: • Non-cash settlement charges related to pension benefits (see Note O): o $635 related to the purchase of group annuity contracts to transfer approximately $1,000 of pension obligations and assets associated with defined benefit pension plans for approximately 4,400 United States retirees and beneficiaries, as well as lump sum settlements; • Charges related to portfolio actions: o $79 for the agreement reached with the workers of the divested Avilés and La Coruña facilities to settle various legal disputes related to the 2019 divestiture (see Note S); o $58 for an asset impairment related to the sale of the Company’s interest in MRN (see Note H); and, o $29 related to the closure of the previously curtailed magnesium smelter facility in Addy (Washington) (see below); • Other charges and credits: o $26 to record additional environmental and asset retirement related reserves at previously closed sites (see Note R and Note S); and, o $7 net credit for revaluation of adjustments to take-or-pay contract reserves related to the closed Wenatchee and curtailed Intalco smelters; • Reversals: o $83 for the release of a valuation allowance on Brazil value added taxes (VAT) (see Note Q); and, o $34 due to lower costs for demolition and remediation at previously closed sites (see Note S). In July 2022, Alcoa made the decision to permanently close the previously curtailed magnesium smelter in Addy. The facility has been fully curtailed since 2001. The Company recorded a charge of $29 to establish reserves for environmental and demolition obligations in Restructuring and other charges, net on the Statement of Consolidated Operations in the third quarter of 2022. 2021 Actions. In 2021 Alcoa Corporation recorded Restructuring and other charges, net, of $1,128 which were comprised of the following components: • Non-cash settlement charges related to pension and certain other postretirement benefits (see Note O): o $858 related to the purchase of group annuity contracts to transfer approximately $1,500 of pension obligations and assets associated with defined benefit pension plans for approximately 14,000 United States retirees and beneficiaries, as well as lump sum settlements; o $63 related to the purchase of a group annuity contract to transfer approximately $55 of pension obligations and assets associated with a Suriname pension plan for approximately 800 retirees and beneficiaries; 87 o $47 related to lump sum settlements; and, o Net $9 related to the settlement and curtailment of certain other postretirement benefits resulting from the sale of the Warrick Rolling Mill; • Charges related to portfolio actions taken as part of the Company’s ongoing strategic review (see details below): o $80 related to the closure of the previously curtailed aluminum smelter facility in Wenatchee (Washington); o $62 related to the agreement reached with the workers at the San Ciprián aluminum smelter to curtail smelting capacity; and, o $27 related to the closure of the previously curtailed anode facility in Lake Charles (Louisiana); • Other charges: o $13 for additional take-or-pay contract costs related to the curtailed Wenatchee and Intalco smelters; o $11 to record additional environmental and asset retirement related reserves (see Note R and Note S); and, o $3 for several other immaterial items; • Reversals: o $6 for a take-or-pay energy-related obligation at the Alumar (Brazil) smelter no longer required due to the restart; o $17 related to the divestiture of the Avilés and La Coruña entities (see below); and, o $22 due to lower costs for demolition and remediation related to previously established reserves (see Note R and Note S). In December 2021, the Company announced the two-year curtailment of 228 kmt of smelting capacity at the San Ciprián smelter. The temporary curtailment, which began at the end of January 2022, was the result of an agreement reached with the workers' representatives at the site to suspend production due to exorbitant energy prices in Spain. Under the terms of the agreement, the Company is responsible for certain employee obligations during 2022 and 2023, and committed to restart the smelter beginning in January 2024. The Company recorded charges of $62 in Restructuring and other charges, net on the Statement of Consolidated Operations to establish the related reserve for employee obligations in 2021. Cash payments were $31 and $26 in 2023 and 2022, respectively and this program is complete as of December 31, 2023. Additionally, the Company made restricted cash available for capital improvements at the site of $68 and smelter restart costs of $35 (see above). During the fourth quarter of 2021, as part of the Company’s ongoing strategic portfolio review, the Company announced the permanent closure of the Wenatchee aluminum smelter. The smelter has been fully curtailed since 2015. Charges related to the closure totaled $90 in the fourth quarter of 2021 and included a charge of $10 for the write-down of remaining inventories to net realizable value recorded in Cost of goods sold on the Statement of Consolidated Operations and a charge of $80 recorded in Restructuring and other charges, net on the Statement of Consolidated Operations. The restructuring charges were comprised of: $30 to write-off the remaining net book value of various assets; $23 of asset impairments; $21 to establish reserves related to environmental and demolition obligations; $5 related to take-or-pay contractual obligations; and $1 of severance and employee termination costs from the separation of approximately 10 employees. Cash payments were $3 and $1 in 2023 and 2022, respectively. During the third quarter of 2021, as part of the Company’s ongoing strategic portfolio review, the Company announced the decision to permanently close the previously curtailed anode facility in Lake Charles. The anode facility within the Lake Charles site has been fully curtailed since 2015. The Company recorded charges of $27 in the third quarter of 2021, which were recorded in Restructuring and other charges, net on the Statement of Consolidated Operations, comprised of asset impairments of $22 and cash-based charges for closure and asset retirement obligations of $5. The closure was completed in September 2022. The decision to permanently close the facility was made as part of the Company’s ongoing portfolio review. The Company’s petroleum coke calciner located at the same site in Lake Charles remains in operation, unaffected by the closure of the anode facility. Alcoa Corporation does not include Restructuring and other charges, net in the results of its reportable segments. The impact of allocating such charges to segment results would have been as follows: Alumina(1) Aluminum Segment total Corporate Total Restructuring and other charges, net 2023 2022 2021 8 169 177 7 184 $ $ (27) $ 82 55 641 696 $ 1 184 185 943 1,128 $ $ (1) Beginning in January 2023, the Company changed its operating segments, by combining the Bauxite and Alumina segments, and reported its financial results in the following two segments: (i) Alumina and (ii) Aluminum (see Note E). 88 Activity and reserve balances for restructuring charges were as follows: Balances at December 31, 2020 Restructuring charges, net Cash payments Reversals and other Balances at December 31, 2021 Restructuring charges, net Cash payments Reversals and other Balances at December 31, 2022 Restructuring charges, net Cash payments Reversals and other Balances at December 31, 2023 Severance and employee termination costs Other costs Total $ $ 6 1 (4) — 3 1 (2) (1) 1 11 (6) — 6 $ $ 57 80 (25) (22) 90 73 (37) (10) 116 55 (118) 4 57 $ $ 63 81 (29) (22) 93 74 (39) (11) 117 66 (124) 4 63 The activity and reserve balances include only Restructuring and other charges, net that impact the reserves for Severance and employee termination costs and Other costs. Restructuring and other charges, net that affected other accounts such as Investments (see Note H), Accrued pension benefits and Accrued other postretirement benefits (see Note O), Asset retirement obligations (see Note R), and Environmental remediation (see Note S) are excluded from the above activity and balances. Reversals and other include reversals of previously recorded liabilities and foreign currency translation impacts. The current portion of the reserve balance is reflected in Other current liabilities on the Consolidated Balance Sheet and the noncurrent portion of the reserve balance is reflected in Other noncurrent liabilities and deferred credits on the Consolidated Balance Sheet. The noncurrent portion of the reserve was $15 and $3 at December 31, 2023 and 2022, respectively. E. Segment and Related Information Segment Information Alcoa Corporation is a producer of bauxite, alumina, and aluminum products. Beginning in January 2023, the financial information provided to the chief operating decision maker (CODM) for the activities of the bauxite mines and the alumina refineries was combined into the Alumina segment, and accordingly the Company changed its operating segments. Beginning with the first quarter of 2023, the Company reported its financial results in the following two segments: (i) Alumina and (ii) Aluminum. Segment information for all prior periods presented has been updated to reflect the new segment structure. Segment performance under Alcoa Corporation’s management reporting system is evaluated based on a number of factors; however, the primary measure of performance is the Adjusted EBITDA (Earnings before interest, taxes, depreciation, and amortization) for each segment. The Company calculates Segment Adjusted EBITDA as Total sales (third-party and intersegment) minus the following items: Cost of goods sold; Selling, general administrative, and other expenses; and Research and development expenses. Alcoa Corporation’s Segment Adjusted EBITDA may not be comparable to similarly titled measures of other companies. The CODM function regularly reviews the financial information, including Adjusted EBITDA, of these two operating segments to assess performance and allocate resources. Segment assets include, among others, customer receivables (third-party and intersegment), inventories, properties, plants, and equipment, and equity investments. The accounting policies of the segments are the same as those described in the Summary of Significant Accounting Policies (see Note B). Transactions between segments are established based on negotiation between the parties. Differences between segment totals and Alcoa Corporation’s consolidated totals for line items not reconciled are in Corporate. 89 The following are detailed descriptions of Alcoa Corporation’s reportable segments: Alumina. This segment represents the Company’s worldwide refining system, including the mining of bauxite, which is then refined into alumina. The alumina produced by this segment is sold primarily to internal and external aluminum smelter customers; a portion of the alumina is sold to external customers who process it into industrial chemical products. Approximately two-thirds of Alumina’s production is sold under supply contracts to third parties worldwide, while the remainder is used internally by the Aluminum segment. Alumina produced by this segment and used internally is transferred to the Aluminum segment at prevailing market prices. A portion of this segment’s third-party sales are completed through the use of alumina traders. Generally, this segment’s sales are transacted in U.S. dollars while costs and expenses are transacted in the local currency of the respective operations, which are the Australian dollar, the Brazilian real, and the euro. Most of the operations that comprise the Alumina segment are part of AWAC (see Principles of Consolidation in Note A). A portion of this segment’s bauxite production represents the offtake from equity method investments in Brazil (prior to the MRN sale in April 2022) and Guinea, as well as AWAC’s share of bauxite production related to an equity investment in Saudi Arabia. Bauxite mined is primarily used internally within the Alumina segment; a portion of the bauxite is sold to external customers. Bauxite sales to third-parties are conducted on a contract basis. This segment also includes AWAC’s 25.1% ownership interest in a mining and refining joint venture company in Saudi Arabia (see Note H). Aluminum. This segment consists of the Company’s (i) worldwide smelting and casthouse system, which processes alumina into primary aluminum, and (ii) portfolio of energy assets in Brazil, Canada, and the United States. Aluminum’s combined smelting and casting operations produce primary aluminum products, nearly all of which are sold to external customers and traders. The smelting operations produce molten primary aluminum, which is then formed by the casting operations into either common alloy ingot (e.g., t-bar, sow, standard ingot) or into value-add ingot products (e.g., foundry, billet, rod, and slab). A variety of external customers purchase the primary aluminum products for use in fabrication operations, which produce products primarily for the transportation, building and construction, packaging, wire, and other industrial markets. Results from the sale of aluminum powder and scrap are also included in this segment, as well as the impacts of embedded aluminum derivatives (see Note P) related to energy supply contracts. The energy assets supply power to external customers in Brazil and the United States, as well as internal customers in the Aluminum segment (Canadian smelters and Warrick (Indiana) smelter) and, to a lesser extent, the Alumina segment (Brazilian refineries). Results from the Warrick Rolling Mill are included in this segment through the first quarter of 2021 (see Note C). Alcoa continues to own and operate the Warrick Operations aluminum smelter and the power plant. Generally, this segment’s aluminum sales are transacted in U.S. dollars while costs and expenses of this segment are transacted in the local currency of the respective operations, which are the U.S. dollar, the euro, the Norwegian krone, the Icelandic króna, the Canadian dollar, the Brazilian real, and the Australian dollar. This segment also includes Alcoa Corporation’s 25.1% ownership interest in a smelting joint venture company in Saudi Arabia (see Note H). 90 The operating results, capital expenditures, and assets of Alcoa Corporation’s reportable segments were as follows: Alumina Aluminum Total 2023 Sales: Third-party sales Intersegment sales Total sales Segment Adjusted EBITDA Supplemental information: Depreciation, depletion, and amortization Equity loss 2022 Sales: Third-party sales Intersegment sales Total sales Segment Adjusted EBITDA Supplemental information: Depreciation, depletion, and amortization Equity (loss) income 2021 Sales: Third-party sales Intersegment sales Total sales Segment Adjusted EBITDA Supplemental information: Depreciation, depletion, and amortization Equity income 2023 Assets: Capital expenditures Equity investments Total assets 2022 Assets: Capital expenditures Equity investments Total assets $ $ $ $ $ $ $ $ $ $ $ $ $ $ 3,613 1,648 5,261 273 333 (48) 3,724 1,708 5,432 788 312 (39) 3,375 1,552 4,927 1,192 351 4 323 395 6,153 320 422 5,859 The following tables reconcile certain segment information to consolidated totals: Sales: Total segment sales Elimination of intersegment sales Other Consolidated sales 2023 $ $ 12,201 (1,663) 13 10,551 91 $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 6,925 15 6,940 461 277 (106) 8,735 27 8,762 1,492 283 48 8,766 18 8,784 1,879 289 116 198 569 5,854 153 685 6,358 2022 14,194 (1,735) (8) 12,451 $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 10,538 1,663 12,201 734 610 (154) 12,459 1,735 14,194 2,280 595 9 12,141 1,570 13,711 3,071 640 120 521 964 12,007 473 1,107 12,217 2021 13,711 (1,570) 11 12,152 Net (loss) income attributable to Alcoa Corporation: Total Segment Adjusted EBITDA Unallocated amounts: Transformation(1) Intersegment eliminations Corporate expenses(2) Provision for depreciation, depletion, and amortization Restructuring and other charges, net (D) Interest expense (U) Other (expenses) income, net (U) Other(3) Consolidated (loss) income before income taxes Provision for income taxes (Q) Net loss (income) attributable to noncontrolling interest Consolidated net (loss) income attributable to Alcoa Corporation 2023 2022 2021 $ 734 $ 2,280 $ 3,071 (80) 7 (133) (632) (184) (107) (134) (55) (584) (189) 122 (66) 138 (128) (617) (696) (106) 118 (221) 702 (664) (161) (44) (119) (129) (664) (1,128) (195) 445 (38) 1,199 (629) (141) $ (651) $ (123) $ 429 (1) Transformation includes, among other items, the Adjusted EBITDA of previously closed operations. (2) Corporate expenses are composed of general administrative and other expenses of operating the corporate headquarters and other global administrative facilities, as well as research and development expenses of the corporate technical center. (3) Other includes certain items that are not included in the Adjusted EBITDA of the reportable segments. December 31, Assets: Total segment assets Elimination of intersegment receivables Unallocated amounts: Cash and cash equivalents Corporate fixed assets, net Corporate goodwill Deferred income taxes Pension assets Other Consolidated assets Product Information 2023 2022 $ $ 12,007 (159) $ 944 392 142 333 125 371 14,155 $ 12,217 (126) 1,363 364 141 296 146 355 14,756 Alcoa Corporation has four product divisions and one divested product division as follows: Bauxite—Bauxite is a reddish clay rock that is mined from the surface of the earth’s terrain. This ore is the basic raw material used to produce alumina and is the primary source of aluminum. Alumina—Alumina is an oxide that is extracted from bauxite and is the basic raw material used to produce primary aluminum. This product can also be consumed for non-metallurgical purposes, such as industrial chemical products. Primary aluminum—Primary aluminum is metal in the form of a common alloy ingot or a value-add ingot (e.g., foundry, billet, rod, and slab). These products are sold primarily to customers that produce products for the transportation, building and construction, packaging, wire, and other industrial markets, and traders. Energy—Energy is the generation of electricity, which is sold in the wholesale market to traders, large industrial consumers, distribution companies, and other generation companies. Flat-rolled aluminum—Flat-rolled aluminum is metal in the form of sheet, which is sold primarily to customers that produce beverage and food cans, including body, tab, and end stock. As noted above, the Company sold the Warrick Rolling Mill in March 2021 which represented the Company’s only Flat-rolled aluminum asset. The results of the Warrick Rolling Mill are included in this product division through the first quarter of 2021. 92 The following table represents the general commercial profile of the Company’s Bauxite, Alumina, and Primary aluminum product divisions (see text below table for Energy): Product division Bauxite Alumina: Smelter-grade Non-metallurgical Primary aluminum: Common alloy ingot Value-add ingot Pricing components Negotiated Shipping terms(3) FOB/CIF Payment terms(4) LC Sight API(1)/spot/fixed Negotiated LME + Regional premium(2) LME + Regional premium + Product premium(2) FOB/CIF FOB/CIF DAP/CIF DAP/CIF LC Sight/CAD/Net 30 days Net 30 days Net 30 to 45 days Net 30 to 45 days (1) API (Alumina Price Index) is a pricing mechanism that is calculated by the Company based on the weighted average of a prior month’s daily spot prices published by the following three indices: CRU Metallurgical Grade Alumina Price, Platts Metals Daily Alumina PAX Price, and FastMarkets Metal Bulletin Non-Ferrous Metals Alumina Index. (2) LME (London Metal Exchange) is a globally recognized exchange for commodity trading, including aluminum. The LME pricing component represents the underlying base metal component, based on quoted prices for aluminum on the exchange. The regional premium represents the incremental price over the base LME component that is associated with the physical delivery of metal to a particular region (e.g., the Midwest premium for metal sold in the United States). The product premium represents the incremental price for receiving physical metal in a particular shape or alloy. (3) CIF (cost, insurance, and freight) means that the Company pays for these items until the product reaches the buyer’s designated destination point related to transportation by vessel. DAP (delivered at place) means the same as CIF related to all methods of transportation. FOB (free on board) means that the Company pays for costs, insurance, and freight until the product reaches the seller’s designated shipping point. (4) The net number of days means that the customer is required to remit payment to the Company for the invoice amount within the designated number of days. LC Sight is a letter of credit that is payable immediately (usually within five to ten business days) after a seller meets the requirements of the letter of credit (i.e. shipping documents that evidence the seller performed its obligations as agreed to with a buyer). CAD (cash against documents) is a payment arrangement in which a seller instructs a bank to provide shipping and title documents to the buyer at the time the buyer pays in full the accompanying bill of exchange. For the Company’s Energy product division, sales of electricity are based on current market prices. Electricity is provided to customers on demand through a national or regional power grid; the customer simultaneously receives and consumes the electricity. Payment terms are generally within 10 days related to the previous 30 days of electricity consumption. The following table details Alcoa Corporation’s Sales by product division: Sales: Primary aluminum Alumina Bauxite Energy Flat-rolled aluminum(1) Other(2) 2023 2022 2021 $ $ 7,045 3,103 466 118 — (181) 10,551 $ $ 8,887 3,478 168 201 — (283) 12,451 $ $ 8,420 3,125 207 286 320 (206) 12,152 (1) Flat-rolled aluminum represented sales of the Warrick Rolling Mill through the sale of the facility in March 2021 (see Note C). (2) Other includes realized gains and losses related to embedded derivative instruments designated as cash flow hedges of forward sales of aluminum (see Note P). 93 Geographic Area Information Geographic information for Third-party sales was as follows (based upon the country where the point of sale originated): Sales: United States(1)(2) Netherlands(3) Australia Brazil Spain(2)(3) Canada Other 2023 2022 2021 $ $ 4,993 2,261 2,240 735 289 1 32 10,551 $ $ 5,462 3,031 2,742 527 618 1 70 12,451 $ $ 5,290 2,644 2,092 610 1,465 11 40 12,152 (1) Sales of a portion of the alumina from refineries in Australia and Brazil and most of the aluminum from smelters in Canada occurred in the United States. (2) Sales of aluminum off-take related to an interest in the Saudi Arabia joint venture (see Note H), occurred in Spain through most of the third quarter of 2021, and in the United States thereafter. (3) Sales of aluminum from smelters in Iceland and Norway occurred in Spain through most of the first quarter of 2021, and in the Netherlands thereafter. Geographic information for long-lived assets was as follows (based upon the physical location of the assets): December 31, Long-lived assets: Australia Brazil Iceland Canada United States Norway Spain Other 2023 2022 $ $ 2,046 1,550 950 896 780 310 250 3 6,785 $ $ 1,944 1,298 1,002 919 830 304 194 2 6,493 94 F. Earnings Per Share Basic earnings per share (EPS) amounts are computed by dividing Net (loss) income attributable to Alcoa Corporation by the average number of common shares outstanding. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive share equivalents outstanding. The share information used to compute basic and diluted EPS attributable to Alcoa Corporation common shareholders was as follows (shares in millions): Average shares outstanding—basic Effect of dilutive securities: Stock options Stock units Average shares outstanding—diluted 2023 2022 2021 178 — — 178 181 — — 181 186 — 4 190 In 2023, basic average shares outstanding and diluted average shares outstanding were the same because the effect of potential shares of common stock was anti-dilutive. Had Alcoa generated net income in 2023, three million common share equivalents related to three million outstanding stock units and stock options combined would have been included in diluted average shares outstanding for the period. In 2022, basic average shares outstanding and diluted average shares outstanding were the same because the effect of potential shares of common stock was anti-dilutive. Had Alcoa generated net income in 2022, three million common share equivalents related to five million outstanding stock units and stock options combined would have been included in diluted average shares outstanding for the period. In 2021, options to purchase less than two hundred thousand shares of common stock outstanding as of December 31, 2021 at a weighted average exercise price of $38.67 per share were not included in the computation of diluted EPS because the exercise prices of these options were greater than the annual average market price of Alcoa Corporation’s common stock. 95 G. Accumulated Other Comprehensive Loss The following table details the activity of the three components that comprise Accumulated other comprehensive loss for both Alcoa Corporation’s shareholders and Noncontrolling interest: Pension and other postretirement benefits (O) Balance at beginning of period Other comprehensive income (loss): Unrecognized net actuarial gain (loss) and prior service cost/benefit Tax (expense) benefit(2) Total Other comprehensive income (loss) before reclassifications, net of tax Amortization of net actuarial loss and prior service cost/benefit(1) Tax expense(2) Total amount reclassified from Accumulated other comprehensive loss, net of tax(7) Total Other comprehensive income (loss) Balance at end of period Foreign currency translation Balance at beginning of period Other comprehensive income (loss) Balance at end of period Cash flow hedges (P) Balance at beginning of period Other comprehensive (loss) income: Net change from periodic revaluations Tax benefit(2) Total Other comprehensive (loss) income before reclassifications, net of tax Net amount reclassified to earnings: Aluminum contracts(3) Financial contracts(4) Interest rate contracts(5) Foreign exchange contracts(6) Sub-total Tax expense(2) Total amount reclassified from Accumulated other comprehensive loss, net of tax(7) Total Other comprehensive (loss) income Balance at end of period Total Accumulated other comprehensive loss 2023 Alcoa Corporation 2022 2021 2023 Noncontrolling interest 2022 2021 $ 62 $ (882) $ (2,536) $ (5) $ (13) $ (67) (112) 17 (95) 39 (6) 33 (62) — $ 263 (42) 221 723 — 723 944 62 (2,685) 92 (2,593) $ $ (2,614) (71) (2,685) $ $ $ 550 (37) 513 1,144 (3) 1,141 1,654 (882) (2,385) (229) (2,614) $ $ $ (916) $ (1,096) $ (708) $ (295) 70 (225) 181 (20) (5) (26) 130 (41) (119) 43 (76) 316 — 5 (5) 316 (60) (782) 140 (642) 288 2 8 (3) 295 (41) 89 (136) (1,052) (3,645) $ $ 256 180 (916) (3,539) $ $ 254 (388) (1,096) (4,592) $ $ $ $ $ $ $ $ (13) 2 (11) 1 — 1 (10) (15) (1,040) 57 (983) 1 — — — — — (1) — (1) — $ $ $ $ (1) (1) — $ 7 — 7 1 — 1 8 (5) (937) (103) (1,040) $ $ $ (1) $ 2 — 2 — — — — — — — 2 1 (998) $ (1,044) $ $ 30 (6) 24 30 — 30 54 (13) (844) (93) (937) (1) (2) 1 (1) — 1 1 — 2 (1) 1 — (1) (951) (1) These amounts were included in the computation of net periodic benefit cost for pension and other postretirement benefits. The amounts related to settlements and/or curtailments of certain pension and other postretirement benefits for Alcoa Corporation include $21, $633, and $952 for the years ended December 31, 2023, 2022, and 2021, respectively. The amounts related to settlements and/or curtailments of certain pension and other postretirement benefits for Noncontrolling interest include $0, ($1), and $25 for the years ended December 31, 2023, 2022, and 2021, respectively (see Note O). (2) These amounts were reported in Provision for income taxes on the accompanying Statement of Consolidated Operations. (3) These amounts were reported in Sales on the accompanying Statement of Consolidated Operations. (4) These amounts were reported in Cost of goods sold on the accompanying Statement of Consolidated Operations. (5) These amounts were included in Other (income) expenses, net on the accompanying Statement of Consolidated Operations. (6) In 2023, $5 was reported in Cost of goods sold and ($31) was reported in Sales on the accompanying Statement of Consolidated Operations. In 2022, $5 was reported in Cost of goods sold and ($10) was reported in Sales on the accompanying Statement of Consolidated Operations. (7) A positive amount indicates a corresponding charge to earnings and a negative amount indicates a corresponding benefit to earnings. 96 H. Investments December 31, Equity investments Other investments 2023 2022 969 10 979 $ $ 1,112 10 1,122 $ $ Equity Investments. The following table summarizes information of Alcoa Corporation’s equity investments as of December 31, 2023 and 2022. In 2023, 2022, and 2021, Alcoa Corporation received $51, $127, and $50, respectively, in dividends from these equity investments. Each of the investees either owns the facility listed or has an ownership interest in an entity that owns the facility listed: Investee Country Nature of investment Ma’aden Aluminum Company Ma’aden Bauxite and Alumina Company Halco Mining, Inc. Energética Barra Grande S.A. Pechiney Reynolds Quebec, Inc. Serra do Facão Energia S/A Manicouagan Power Limited Partnership Canada Canada ElysisTM Limited Partnership Saudi Arabia Aluminum smelter and casthouse Saudi Arabia Bauxite mine and alumina refinery Guinea Brazil Canada Brazil Bauxite mine Hydroelectric generation facility Aluminum smelter Hydroelectric generation facility Hydroelectric generation facility Aluminum smelting technology Income Statement Location of Equity Earnings Other expenses (income), net Other expenses (income), net Cost of goods sold Cost of goods sold Cost of goods sold Cost of goods sold Cost of goods sold Other expenses (income), net Ownership interest 25.1% 25.1% 45% 42.18% 50% 34.97% 40% 48.235% Saudi Arabia Joint Venture—Alcoa Corporation and Ma’aden have a 30-year (from December 2009) joint venture shareholders agreement (automatic extension for an additional 20 years, unless the parties agree otherwise or unless earlier terminated) setting forth the terms for the development, construction, ownership, and operation of an integrated aluminum complex in Saudi Arabia. The project developed by the joint venture consists of a bauxite mine from the Al Ba’itha bauxite deposit in the northern part of Saudi Arabia, an alumina refinery, a primary aluminum smelter, and an aluminum rolling mill. The joint venture is owned 74.9% by Ma’aden and 25.1% by Alcoa Corporation and originally consisted of three separate companies as follows: the bauxite mine and alumina refinery (Ma’aden Bauxite and Alumina Company; MBAC), the smelter (Ma’aden Aluminum Company; MAC), and the rolling mill (Ma’aden Rolling Company; MRC). In June 2019, Alcoa Corporation and Ma’aden amended the joint venture agreement that governs the operations of each of the three companies that comprise the joint venture. Under the terms of the agreement, Alcoa Corporation transferred its 25.1% interest in MRC to Ma’aden and, as a result, has no further direct or indirect equity interest in MRC. In accordance with the June 2019 amended joint venture agreement, Ma’aden’s put option and Alcoa Corporation’s call option, relating to additional interests in the joint venture, were exercisable for a period of six months after October 1, 2021. On March 31, 2022, Ma’aden’s and Alcoa’s put and call options, respectively, expired with neither party exercising their options. The results for the Saudi Arabia joint venture for the year ended December 31, 2022 include a charge related to a dispute with an industrial utility for periods in 2021 and 2022. Alcoa’s share of this charge was $21 which is included in Other expenses (income), net on the Statement of Consolidated Operations for the year ended December 31, 2022. The results for the Saudi Arabia joint venture for the year ended December 31, 2023 include an adjustment to the estimate for the settlement of this dispute. Alcoa’s share of this adjustment is $41 which is included in Other expenses (income), net on the Statement of Consolidated Operations for 2023. As of December 31, 2023 and 2022, the carrying value of Alcoa’s investment in this joint venture was $533 and $710, respectively. ELYSIS Limited Partnership—In June 2018, Alcoa Corporation, Rio Tinto Alcan Inc. (Rio Tinto), and Investissement Québec, a company wholly-owned by the Government of Québec, Canada, launched the ELYSIS Limited Partnership (ELYSIS). The purpose of this partnership is to advance larger scale development and commercialization of its patent-protected technology that produces oxygen and eliminates direct greenhouse gas emissions from the traditional aluminum smelting process. Alcoa and Rio Tinto plc, as general partners, each own a 48.235% stake in ELYSIS, and the Québec provincial government, as a limited partner, owns a 3.53% stake. The federal government of Canada and Apple Inc., as well as the Québec provincial government, are providing initial financing to the partnership. Through December 31, 2023, the Company has contributed $118 (C$155) toward its investment commitment in ELYSIS. The Company’s basis in the investment has been reduced to zero for its share of losses incurred to date. In addition to cash contributions, Alcoa is contributing approximately $3 annually to cover overhead expenses incurred by Alcoa and charged to the joint venture. As a result, the Company has $60 in unrecognized losses as of December 31, 2023 that will be recognized upon additional contributions into the partnership. 97 The following table summarizes the profit and loss data for the respective periods ended December 31, as it relates to Alcoa Corporation’s equity investments. Information shown for the Saudi Arabia Joint Venture for all periods presented includes the combined balances for MAC and MBAC. The investments are grouped based on the nature of the investment. The Mining investments are part of the Alumina segment, while the Energy and Other investments are primarily part of the Aluminum segment. Saudi Arabia Joint Venture Mining Energy Other 2023 Sales Cost of goods sold Net (loss) income Equity in net (loss) income of affiliated companies, before reconciling adjustments Other Alcoa Corporation’s equity in net (loss) income of affiliated companies 2022 Sales Cost of goods sold Net income (loss) Equity in net income (loss) of affiliated companies, before reconciling adjustments Other Alcoa Corporation’s equity in net income (loss) of affiliated companies 2021 Sales Cost of goods sold Net income (loss) Equity in net income (loss) of affiliated companies, before reconciling adjustments Other Alcoa Corporation’s equity in net income of affiliated companies $ $ $ $ 2,726 2,550 (457) $ $ (115) (43) (158) 3,317 2,696 42 11 (7) 4 3,127 2,083 495 124 (8) 116 $ $ $ 670 446 50 23 - 23 763 488 110 39 (2) 37 794 571 30 18 5 23 $ $ $ 236 118 100 39 1 40 252 120 109 41 (3) 38 264 135 114 45 (1) 44 The following table summarizes the balance sheet data for the respective periods ended December 31, as it relates to Alcoa Corporation’s equity investments. 2023 Current assets Noncurrent assets Current liabilities Noncurrent liabilities 2022 Current assets Noncurrent assets Current liabilities Noncurrent liabilities Saudi Arabia Joint Venture Mining Energy Other $ $ $ $ 1,433 6,958 1,444 4,272 1,769 6,993 1,255 4,314 $ $ 8 419 5 24 5 363 3 24 $ $ 103 310 16 34 114 301 13 26 464 425 (97) (46) (9) (55) 488 445 (75) (36) 15 (21) 404 365 (42) (20) 25 5 181 764 89 117 134 757 114 84 On February 15, 2022, the Company signed an agreement to sell its share of its investment in MRN in Brazil for $10 to South32 Minerals S.A. Related to this transaction, the Company recorded an asset impairment of $58 in the first quarter of 2022 in Restructuring and other charges, net on the Statement of Consolidated Operations. On April 30, 2022, Alcoa completed the sale of its investment in MRN. An additional $30 in cash could be paid to the Company in the future if certain post-closing conditions related to future MRN mine development are satisfied. 98 I. Receivables On January 31, 2023, a wholly-owned special purpose entity (SPE) of the Company entered into a one-year agreement with a financial institution to sell up to $150 of certain customer receivables without recourse on a revolving basis. On August 27, 2023, the Company amended the agreement to decrease the amount of certain receivables that can be transferred from $150 to $130. On November 15, 2023, the Company amended the agreement to extend the termination date from January 30, 2024 to November 14, 2024. Company subsidiaries sell customer receivables to the SPE, which then transfers the receivables to the financial institution. The Company does not maintain effective control over the transferred receivables, and therefore accounts for the transfers as sales of receivables. Alcoa Corporation guarantees the performance obligations of the Company subsidiaries and unsold customer receivables are pledged as collateral to the financial institution to secure the sold receivables. At December 31, 2023, the SPE held unsold customer receivables of $104 pledged as collateral against the sold receivables. The Company continues to service the customer receivables that were transferred to the financial institution. As Alcoa collects customer payments, the SPE transfers additional receivables to the financial institution rather than remitting cash. In 2023, the Company sold gross customer receivables of $591, and reinvested collections of $477 from previously sold receivables, resulting in net cash proceeds from the financial institution of $114. Cash collections from previously sold receivables yet to be reinvested of $99 were included in Accounts payable, trade on the accompanying Consolidated Balance Sheet as of December 31, 2023. Cash received from sold receivables under the agreement are presented within operating activities in the Statement of Consolidated Cash Flows. J. Inventories December 31, Finished goods Work-in-process Bauxite and alumina Purchased raw materials Operating supplies K. Properties, Plants, and Equipment, Net December 31, Land and land rights, including mines Structures (by type of operation): Bauxite mining and alumina refining Aluminum smelting and casting Energy generation Other Machinery and equipment (by type of operation): Bauxite mining and alumina refining Aluminum smelting and casting Energy generation Other Less: accumulated depreciation, depletion, and amortization Construction work-in-progress 99 2023 2022 355 287 586 700 230 2,158 $ $ 2023 2022 257 $ 4,085 3,274 380 357 8,096 4,352 5,781 869 457 11,459 19,812 13,596 6,216 569 6,785 $ 385 350 584 923 185 2,427 253 3,515 3,265 354 346 7,480 4,227 5,813 851 461 11,352 19,085 13,112 5,973 520 6,493 $ $ $ $ L. Goodwill and Other Intangible Assets Goodwill, which is included in Other noncurrent assets on the accompanying Consolidated Balance Sheet, was as follows: December 31, Alumina Aluminum Corporate(1) 2023 2022 4 — 142 146 $ $ 4 — 141 145 $ $ (1) The carrying value of Corporate’s goodwill is net of accumulated impairment losses of $742 as of both December 31, 2023 and 2022. As of December 31, 2023, the $142 of goodwill reflected in Corporate is allocated to Alcoa Corporation's Alumina reportable segment for purposes of impairment testing (see Note B). This goodwill is reflected in Corporate for segment reporting purposes because it is not included in management’s assessment of performance by the reportable segment. Changes in the carrying amount of goodwill were attributable to foreign currency translation as of December 31, 2023 and 2022. Management performed a quantitative assessment for the Alumina reporting unit in the fourth quarter 2023. The estimated fair value of the Alumina reporting unit was substantially in excess of its carrying value, resulting in no impairment. As a result of the January 2023 segment change, the Company reviewed the recoverability of the carrying value of goodwill of its Alumina reporting unit in the first quarter of 2023. The estimated fair value of the Alumina reporting unit substantially exceeded the reporting unit’s carrying value, resulting in no impairment. Other intangible assets, which are included in Other noncurrent assets on the accompanying Consolidated Balance Sheet, were as follows: December 31, Computer software Patents and licenses Other intangibles Total other intangible assets 2023 2022 Gross carrying amount Accumulated amortization Net carrying amount Gross carrying amount Accumulated amortization Net carrying amount $ $ 207 $ 25 21 253 $ (194) $ (10) (12) (216) $ 13 $ 15 9 37 $ 206 $ 25 20 251 $ (202) $ (9) (11) (222) $ 4 16 9 29 Computer software consists primarily of software costs associated with the enterprise business solution within Alcoa to drive common systems among all businesses. Amortization expense related to the intangible assets in the table above for the years ended December 31, 2023, 2022, and 2021 was $5, $7, and $11, respectively, and is expected to be approximately $10 annually from 2024 to 2028. 100 M. Debt Short-term Borrowings. December 31, Short-term borrowings 2023 2022 $ 56 $ — Short-term borrowings are reported in Other current liabilities on the accompanying Consolidated Balance Sheet. Inventory Repurchase Agreements During 2023, the Company entered into inventory repurchase agreements whereby the Company sold aluminum to a third party and agreed to subsequently repurchase substantially similar inventory. The Company did not record sales upon each shipment of inventory and the net cash received of $56 related to these agreements was recorded in Short-term borrowings as of December 31, 2023. For the year ended December 31, 2023, the Company recorded borrowings of $117 and repurchased $61 of inventory related to these agreements. As of December 31, 2023, inventory sold of $56 was reflected in Prepaid expenses and other current assets on the Consolidated Balance Sheet. The cash received and subsequently paid under the inventory repurchase agreements is included in Cash provided from financing activities on the Statement of Consolidated Cash Flows for the year-ended December 31, 2023. Long-term Debt. December 31, 5.500% Notes, due 2027 6.125% Notes, due 2028 4.125% Notes, due 2029 Other Unamortized discounts and deferred financing costs Total Less: amount due within one year Long-term debt, less amount due within one year 2023 2022 $ $ 750 500 500 82 (21) 1,811 79 1,732 $ $ 750 500 500 84 (27) 1,807 1 1,806 The principal amount of long-term debt maturing in each of the next five years is: $79 in 2024, $1 in each of 2025 and 2026, $750 in 2027, and $500 in 2028. At December 31, 2023, Other includes $78 related to a term loan that matures in November 2024. 144A Debt. 2029 Notes. In March 2021, Alcoa Nederland Holding B.V. (ANHBV), a wholly-owned subsidiary of Alcoa Corporation, completed a Rule 144A (U.S. Securities Act of 1933, as amended) debt issuance for $500 aggregate principal amount of 4.125% Senior Notes due 2029 (the 2029 Notes) with the following terms: • Net proceeds were approximately $493, reflecting a discount to the initial purchasers as well as issuance costs. The discount, as well as costs to complete the financing, were deferred and are being amortized to interest expense over the term; • Interest is paid semi-annually in March and September, which commenced September 30, 2021; • Indenture contains customary affirmative and negative covenants, see below; • Option to redeem on at least 10 days, but not more than 60 days, prior notice to the holders under multiple scenarios, including, in whole or in part, at any time, or from time to time after March 31, 2024, at a redemption price up to 102.063% of the principal amount, plus any accrued and unpaid interest; and, • Subject to repurchase upon the occurrence of a change in control repurchase event (as defined in the indenture) at a repurchase price in cash equal to 101% of the aggregate principal amount of the notes repurchased, plus any accrued and unpaid interest. The Company used the net proceeds of the 2029 Notes, together with cash on hand, to contribute $500 to its U.S. defined benefit pension plans applicable to salaried and hourly employees on April 1, 2021 (see Note O), to redeem in full $750 aggregate principal amount of the Company’s outstanding 6.75% Senior Notes due 2024 on April 7, 2021, and to pay transaction-related fees and expenses. 2027 Notes. In July 2020, ANHBV completed a Rule 144A debt issuance for $750 aggregate principal amount of 5.500% Senior Notes due 2027 (the 2027 Notes) with the following terms: 101 • Net proceeds were approximately $736, reflecting a discount to the initial purchasers as well as issuance costs. The discount, as well as costs to complete the financing, were deferred and are being amortized to interest expense over the term; • Interest is paid semi-annually in June and December, which commenced on December 15, 2020; • Indenture contains customary affirmative and negative covenants, see below; • Option to redeem on at least 15 days, but not more than 60 days, prior notice to the holders under multiple scenarios, including, in whole or in part, at any time, or from time to time after June 15, 2023, at a redemption price up to 102.750% of the principal amount, plus any accrued and unpaid interest; and, • Subject to repurchase upon the occurrence of a change in control repurchase event (as defined in the indenture) at a repurchase price in cash equal to 101% of the aggregate principal amount of the notes repurchased, plus any accrued and unpaid interest. The Company used the net proceeds of the 2027 Notes for general corporate purposes, including adding cash to its balance sheet. 2028 Notes. In May 2018, ANHBV completed a Rule 144A debt issuance for $500 aggregate principal amount of 6.125% Senior Notes due 2028 (the 2028 Notes) with the following terms: • Net proceeds were approximately $492, reflecting a discount to the initial purchasers as well as issuance costs. The discount, as well as costs to complete the financing, were deferred and are being amortized to interest expense over the term; • Interest is paid semi-annually in November and May, which commenced November 15, 2018; • Indenture contains customary affirmative and negative covenants, see below; • Option to redeem on at least 30 days, but not more than 60 days, prior notice to the holders under multiple scenarios, including, in whole or in part, at any time, or from time to time after May 2023, at a redemption price up to 103.063% of the principal amount, plus any accrued and unpaid interest; and, • Subject to repurchase upon the occurrence of a change in control repurchase event (as defined in the indenture) at a repurchase price in cash equal to 101% of the aggregate principal amount of the notes repurchased, plus any accrued and unpaid interest. The Company used the net proceeds of the 2028 Notes, together with cash on hand, to make discretionary contributions to certain U.S. defined benefit pension plans. The indentures governing the 2027 Notes, 2028 Notes, and 2029 Notes contain customary affirmative and negative covenants, such as limitations on liens, limitations on sale and leaseback transactions, and a prohibition on a reduction in the ownership of AWAC entities below an agreed level. The negative covenants in the indentures are less extensive than those in the Revolving Credit Facility (see below). For example, the indentures do not include a limitation on restricted payments, such as repurchases of common stock and dividends to stockholders. The 2027 Notes, the 2028 Notes, and the 2029 Notes are senior unsecured obligations of ANHBV and do not entitle the holders to any registration rights pursuant to a registration rights agreement. ANHBV does not intend to file a registration statement with respect to resales of or an exchange offer for the notes. The notes are guaranteed on a senior unsecured basis by Alcoa Corporation and its subsidiaries that are guarantors under the Facility (the “subsidiary guarantors” and, together with Alcoa Corporation, the “guarantors”). Each of the subsidiary guarantors will be released from their guarantees upon the occurrence of certain events, including the release of such guarantor from its obligations as a guarantor under the Facility. The 2027 Notes, the 2028 Notes, and the 2029 Notes rank equally in right of payment with each other and with all of ANHBV’S existing and future senior unsecured indebtedness; rank senior in right of payment to any future subordinated obligations of ANHBV; and are effectively subordinated to ANHBV’s existing and future secured indebtedness, including under the Facility, to the extent of the value of property and assets securing such indebtedness. The guarantees of the notes rank equally in right of payment with each other and with all the guarantors’ existing and future senior unsecured indebtedness; rank senior in right of payment to any future subordinated obligations of the guarantors; and are effectively subordinated to the guarantors’ existing and future secured indebtedness, including under the Facility, to the extent of the value of property and assets securing such indebtedness. Redemption events. On April 7, 2021, the Company redeemed in full $750 aggregate principal amount notes due in 2024 at a redemption price equal to 103.375% of the principal amount, plus accrued and unpaid interest. The issuance of the 2029 Notes and this redemption were determined to be an issuance of new debt and an extinguishment of existing debt. As a result, the Company recorded a loss of $32 on the extinguishment of debt in the second quarter of 2021 in Interest expense, which was comprised of the redemption premium and the write-off of deferred financing fees and unamortized debt issuance costs. The cash flows related to the transaction were classified as financing cash flows. On September 30, 2021, the Company redeemed in full $500 aggregate principal amount notes due in 2026 at a redemption price equal to 103.5% of the principal amount, plus accrued and unpaid interest. As a result, the Company recorded a loss of $22 on the extinguishment of debt in the third quarter of 2021 in Interest expense, which was comprised of the redemption premium and the write-off of deferred financing fees and unamortized debt issuance costs. The cash flows related to the transaction were classified as financing cash flows. 102 Credit Facilities. Revolving Credit Facility On June 27, 2022, Alcoa Corporation and Alcoa Nederland Holding B.V. (ANHBV), a wholly owned subsidiary of Alcoa Corporation and the borrower, entered into an amendment and restatement agreement (the Third Amendment and Restatement) (as amended and restated, the Revolving Credit Facility) that provided additional flexibility to the Company and ANHBV by (i) extending the maturity date of the Revolving Credit Facility from November 2023 to June 2027, (ii) reducing the aggregate commitments under the facility from $1,500 to $1,250, (iii) releasing the collateral package that had previously secured the Revolving Credit Facility, which would have continued so long as certain credit ratings were maintained, (iv) increasing the maximum leverage ratio from 2.75 to 1.00 to 3.25 to 1.00, which increased following material acquisitions for four consecutive fiscal quarters following an acquisition, (v) providing a debt to capitalization ratio not to exceed .60 to 1.00 to replace the maximum leverage ratio upon a ratings upgrade to investment grade by Moody’s Investor Service (Moody’s) or Standard and Poor’s Global Ratings (S&P), and (vi) providing flexibility for dividends and other restricted payments, to make investments, and to incur additional indebtedness. The Revolving Credit Facility implemented a sustainability adjustment to the applicable margin and commitment fee that may result in a positive or negative adjustment based on two of the Company’s existing sustainability metrics. On July 26, 2022, Moody’s upgraded the rating of ANHBV’s senior unsecured notes to Baa3 (investment grade). In addition to the financial covenants, the Revolving Credit Facility includes several customary affirmative and negative covenants (applicable to Alcoa Corporation and certain subsidiaries described as restricted), that, subject to certain exceptions, include limitations on (among other things): indebtedness, liens, investments, sales of assets, restricted payments, entering into restrictive agreements, a covenant prohibiting reductions in the ownership of AWAC entities, and certain other specified restricted subsidiaries of Alcoa Corporation, below an agreed level. The Revolving Credit Facility also contains customary events of default, including failure to make payments under the Revolving Credit Facility, cross-default and cross-judgment default, and certain bankruptcy and insolvency events. As of December 31, 2023, the Company was in compliance with all financial covenants. The Company may access the entire amount of commitments under the Revolving Credit Facility. There were no borrowings outstanding at December 31, 2023 and 2022, and no amounts were borrowed during 2023 and 2022 under the Revolving Credit Facility. On January 17, 2024, Alcoa Corporation, ANHBV, and certain subsidiaries of the Company entered into Amendment No. 1 (Amendment No. 1) to the Revolving Credit Facility (Amended Revolving Credit Facility). The Amended Revolving Credit Facility provides additional flexibility to the Company and the Borrower by temporarily (i) reducing the minimum interest coverage ratio required thereunder from 4.00 to 1.00 to 3.00 to 1.00 and (ii) providing for a maximum addback for cash restructuring charges in Consolidated EBITDA (as defined in the Revolving Credit Facility) of $450, in each case for the 2024 fiscal year. As of January 1, 2025, the minimum interest coverage ratio requirement will revert to 4.00 to 1.00 and the maximum addback for cash restructuring charges in Consolidated EBITDA will revert to 15% of Consolidated EBITDA. The requirement that the Company maintain a debt to capitalization ratio not to exceed .60 to 1.00 was not changed by Amendment No. 1. In connection with Amendment No. 1, the Company also agreed to provide collateral for its obligations under the Amended Revolving Credit Facility, which will require it to execute all security documents to re-secure collateral under the Amended Revolving Credit Facility by, subject to certain exceptions, a first priority security interest in substantially all assets of the Company, the Borrower, the material domestic wholly-owned subsidiaries of the Company, and the material foreign wholly-owned subsidiaries of the Company located in Australia, Brazil, Canada, Luxembourg, the Netherlands, Norway, and Switzerland including equity interests of certain subsidiaries that directly hold equity interests in AWAC entities. The collateral would be released if, on or after January 1, 2025, the Company or the Borrower (as applicable) (i) has at least two of the following three designated ratings: (x) Baa3 from Moody’s, (y) BBB- from S&P and (z) BBB- from Fitch Ratings and (ii) does not have any designated rating lower than: (x) Ba1 from Moody’s, (y) BB+ from S&P and (z) BB+ from Fitch Ratings. The Amended Revolving Credit Facility contains customary affirmative covenants, negative covenants, and events of default substantially comparable to the Revolving Credit Facility (other than those that are described above and other minor changes). The representations, warranties and covenants contained in the Amended Revolving Credit Facility were made only for purposes of Amendment No. 1 and as of specific dates and were solely for the benefit of the parties to the Amended Revolving Credit Facility. Japanese Yen Revolving Credit Facility In April 2023, the Company entered into a one-year unsecured revolving credit facility for $250 (available to be drawn in Japanese yen) (the Japanese Yen Revolving Credit Facility). Subject to the terms and conditions under the facility, the Company or ANHBV may borrow funds. The facility included covenants that are substantially the same as those included in the Revolving Credit Facility. 103 As of December 31, 2023, the Company was in compliance with all financial covenants. The Company may access the entire amount of commitments under the facility. There were no borrowings outstanding at December 31, 2023 and $10 was borrowed and subsequently repaid in 2023. On January 17, 2024, Alcoa Corporation and ANHBV, entered into Amendment No. 1 to the Japanese Yen Revolving Credit Facility (Amended Japanese Yen Revolving Credit Facility) which contains changes that are substantially the same as those included in the Amended Revolving Credit Facility (as described above). Also in connection with this amendment, the Company agreed to provide collateral for its obligations with the same conditions as the Amended Revolving Credit Facility. On January 24, 2024, ANHBV drew $201 against this facility. N. Preferred and Common Stock Preferred Stock. Alcoa Corporation is authorized to issue 100,000,000 shares of preferred stock at a par value of $0.01 per share. At December 31, 2023 and 2022, the Company had no issued preferred stock. Common Stock. Alcoa Corporation is authorized to issue 750,000,000 shares of common stock at a par value of $0.01 per share. As of December 31, 2023 and 2022, Alcoa Corporation had 178,472,464 and 176,969,091, respectively, issued and outstanding shares of common stock. Under its employee stock-based compensation plan, the Company issued shares of 1,503,373 in 2023, 1,434,543 in 2022, and 1,305,979 in 2021. The Company issues new shares to satisfy the exercise of stock options and the conversion of stock units. As of December 31, 2023, 20,525,431 shares of common stock were available for issuance. Common Stock Repurchase In October 2021, Alcoa Corporation’s Board of Directors approved a common stock repurchase program under which the Company may purchase shares of its outstanding common stock up to an aggregate transactional value of $500, depending on cash availability, market conditions, and other factors. In July 2022, Alcoa Corporation announced that its Board of Directors approved an additional common stock repurchase program under which the Company may purchase shares of its outstanding common stock up to an aggregate transactional value of $500, depending on the Company’s continuing analysis of market, financial, and other factors (the New Repurchase Program). No shares were repurchased in 2023. As of the date of this report, the Company is currently authorized to repurchase up to a total of $500, in the aggregate, of its outstanding shares of common stock under the New Repurchase Program. Repurchases under this program may be made using a variety of methods, which may include open market purchases, privately negotiated transactions, or pursuant to a Rule 10b5-1 plan. This program may be suspended or discontinued at any time and does not have a predetermined expiration date. Alcoa Corporation intends to retire repurchased shares of common stock. In 2022, the Company repurchased 8,565,200 shares of its common stock for $500, which fully exhausted the October 2021 authorization; the shares were immediately retired. In 2021, the Company repurchased 3,184,300 shares of its common stock for $150; the shares were immediately retired. Dividend Dividends on common stock are subject to authorization by Alcoa Corporation’s Board of Directors. In October 2021, the Company announced the initiation of a quarterly cash dividend on its common stock and the Board of Directors declared the first quarterly cash dividend of $0.10 per share of the Company’s common stock. Dividends paid totaled $19 in 2021. Quarterly dividends paid were $0.10 per share in 2023 and 2022, totaling $72 in both years. The details of any future cash dividend declaration, including the amount of such dividend and the timing and establishment of the record and payment dates, will be determined by the Board of Directors. The decision of whether to pay future cash dividends and the amount of any such dividends will be based on the Company's financial position, results of operations, cash flows, capital requirements, business conditions, the requirements of applicable law, and any other factors the Board of Directors may deem relevant. 104 Stock-based Compensation Restricted stock units are generally granted in January and/or February of each calendar year to eligible employees (the Company’s Board of Directors also receive certain stock units; however, these amounts are not material). Time-based restricted stock units (RSUs) generally cliff vest on the third anniversary of the award grant date. The Company also grants performance restricted stock units (PRSUs), which are subject to performance conditions and earned after the end of the three-year measurement period. As of January 1, 2021, the Company no longer grants stock options. The final number of PRSUs earned is dependent on Alcoa Corporation’s achievement of certain targets over a three-year measurement period for grants. For PRSUs granted in 2021, the award was earned after the end of the measurement period of January 1, 2021 through December 31, 2023 based on performance against four measures: (1) the Company’s total shareholder return measured against the ranked total shareholder return of the Standard & Poor’s Metals and Mining Select Industry Index components; (2) a pre- established return-on-equity target; (3) an improvement in proportional net debt; and (4) a reduction in carbon intensity in both refining (through reduced carbon dioxide emissions) and smelting (through increased production from renewable energy) operations. For PRSUs granted in 2022, the award will be earned after the end of the measurement period of January 1, 2022 through December 31, 2024 based on performance against three measures: (1) the Company’s total shareholder return measured against the ranked total shareholder return of the Standard & Poor’s Metals and Mining Select Industry Index components; (2) a pre-established return-on- equity target; and (3) a reduction in carbon intensity in both refining (through reduced carbon dioxide emissions) and smelting (through increased production from renewable energy) operations. For PRSUs granted in 2023, the award will be earned after the end of the measurement period of January 1, 2023 through December 31, 2025 based on performance against three measures: (1) the Company’s total shareholder return measured against the ranked total shareholder return of the Standard & Poor’s Metals and Mining Select Industry Index components; (2) a pre-established return-on-equity target; and (3) a reduction in carbon intensity in both refining (through reduced carbon dioxide emissions) and smelting (through increased production from renewable energy) operations. In 2023, 2022, and 2021, Alcoa Corporation recognized stock-based compensation expense of $35, $40, and $39, respectively, of which approximately 95% to 100% was related to stock units in each period. There was no stock-based compensation expense capitalized in 2023, 2022, and 2021. Stock-based compensation expense is based on the grant date fair value of the applicable equity grant. For both RSUs and PRSUs, the fair value was equivalent to the closing market price per share of Alcoa Corporation’s common stock on the date of grant in the respective periods. For stock units with a market condition, the fair value was estimated on the date of grant using a Monte Carlo simulation model, which generated a result of $71.12, $126.86, and $39.88 per unit in 2023, 2022, and 2021, respectively. The Monte Carlo simulation model uses certain assumptions to estimate the fair value of a market-based stock unit, including volatility and a risk- free interest rate, to estimate the probability of satisfying market conditions. Volatility (64.88%, 65.25%, and 60.19% in 2023, 2022, and 2021, respectively) was estimated using the historical volatility of the Company calculated from daily stock price returns. The risk-free interest rate (4.26%, 1.71%, and 0.22% in 2023, 2022, and 2021, respectively) was based on the U.S. Treasury yield curve at the time of the grant based on the remaining performance period. The activity for stock units and stock options during 2023 was as follows: Outstanding, January 1, 2023 Granted Exercised Converted Expired or forfeited Performance share adjustment Outstanding, December 31, 2023 Stock units Stock options Number of units 4,606,215 835,083 — (2,090,761) (354,230) (862) 2,995,445 $ $ Weighted average FMV per unit 26.08 49.95 — 16.98 55.82 127.42 35.54 Number of options 220,596 — (70,060) — (1,928) — 148,608 $ $ Weighted average exercise price 23.88 — 17.94 — 19.89 — 26.73 The number of Converted units includes 657,448 shares withheld to meet the Company’s statutory tax withholding requirements related to the income earned by the employees as a result of vesting in the units. 105 As of December 31, 2023, the 148,608 outstanding stock options were fully vested and exercisable, had a weighted average remaining contractual life of 3.99 years, a total intrinsic value of $2 and a weighted average exercise price of $26.73. Cash received from stock option exercises was $1, $22, and $25 in 2023, 2022, and 2021, respectively. The total intrinsic value of stock options exercised during 2023, 2022, and 2021 was $2, $22, and $17, respectively. The total fair value of stock units converted during 2023, 2022, and 2021 was $35, $32 and $19, respectively. At December 31, 2023, there was $23 of combined unrecognized compensation expense (pretax) related to non-vested grants of stock units. This expense is expected to be recognized over a weighted average period of 1.80 years. O. Pension and Other Postretirement Benefits Defined Benefit Plans Alcoa sponsors several defined benefit pension plans covering certain employees in the U.S. and foreign locations. Pension benefits generally depend on length of service, job grade, and remuneration. Substantially all benefits are paid through pension trusts that are sufficiently funded to ensure that all plans can pay benefits to retirees as they become due. Most salaried and non-bargaining hourly U.S. employees hired after March 1, 2006 and most bargaining hourly U.S. employees hired after January 1, 2020 participate in a defined contribution plan instead of a defined benefit plan. The Company also maintains health care postretirement benefit plans covering certain eligible U.S. retired employees and certain retirees from foreign locations. Generally, the medical plans are unfunded and pay a percentage of medical expenses, reduced by deductibles and other coverage. The Company retains the right, subject to existing agreements, to change or eliminate these benefits. All salaried and certain non-bargaining hourly U.S. employees hired after January 1, 2002 and certain bargaining hourly U.S. employees hired after July 1, 2010 are not eligible for postretirement health care benefits. As of January 1, 2023, the pension benefit plans and the other postretirement benefit plans covered an aggregate of approximately 17,000 and approximately 21,000 participants, respectively. 2023 Plan Actions. In 2023, management initiated the following actions to certain pension plans: Action #1 – In the second quarter of 2023, plan amendment accounting and related plan remeasurements were triggered within the Surinamese pension and other postretirement plans as a result of participants electing to prospectively convert their Surinamese dollar pension and Company-provided retiree medical to a United States dollar pension with no Company-provided retiree medical. As a result, Alcoa recorded a $15 increase to Accrued pension benefits and a $9 decrease to Accrued other postretirement benefits. Action #2 – In the second quarter of 2023, settlement accounting and related plan remeasurements were triggered within certain Canadian pension plans as a result of the Company's purchase of group annuity contracts to transfer the obligation to pay the remaining retirement benefits of approximately 530 retirees and beneficiaries from its Canadian defined benefit pension plans. The transfer of approximately $235 in both plan obligations and plan assets was completed in April 2023. As a result, Alcoa recorded a $22 increase to Accrued pension benefits and a $5 decrease to Other noncurrent assets and recognized a non-cash settlement loss of $21 ($16 after-tax) in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations. Action #3 – In the third quarter of 2023, settlement accounting and a related plan remeasurement was triggered within Alcoa’s Australian pension plan as a result of participants electing lump sum payments. As a result, Alcoa recorded a $2 decrease to Other noncurrent assets. The following table presents certain information and the financial impacts of these actions on the accompanying Consolidated Financial Statements: Weighted average discount rate as of prior plan remeasurement date 5.58% 5.20% 5.08% Action # 1 2 3 Number of affected plan participants ~370 ~530 ~50 ~950 Plan remeasurement date March 31, 2023 April 30, 2023 September 30, 2023 Weighted average discount rate as of plan remeasurement date 5.20% 4.80% 5.03% $ $ Increase to accrued pension benefits liability Decrease to other noncurrent assets Decrease to accrued other postretirement benefits liability Settlement loss(1) 15 22 — 37 $ $ — $ (5) (2) (7) $ (9) — — (9) $ $ — 21 — 21 106 (1) This amount represents the net actuarial loss and was reclassified from Accumulated other comprehensive loss to Restructuring and other charges, net (see Note D) on the accompanying Statement of Consolidated Operations. 2022 Plan Actions. In 2022, management initiated the following actions to certain pension and other postretirement benefit plans: Action #1 – In the third quarter of 2022, settlement accounting and related plan remeasurements were triggered within Alcoa’s U.S. pension plans as a result of the Company’s purchase of group annuity contracts to transfer the obligation to pay the remaining retirement benefits of approximately 4,400 retirees and beneficiaries from its U.S. defined benefit pension plans. The transfer of approximately $1,000 in both plan obligations and plan assets was completed in August 2022. As a result, Alcoa recorded a $5 increase to Accrued pension benefits and a $27 increase to Other noncurrent assets and recognized a non-cash settlement loss of $617 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations. Action #2 – In the third quarter of 2022, settlement accounting and related plan remeasurements were triggered within Alcoa’s U.S. pension plans as a result of participants electing lump sum payments. Alcoa recognized a non-cash settlement loss of $11 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations. Action #3 – In the third quarter of 2022, settlement accounting and a related plan remeasurement was triggered within Alcoa’s U.S. salaried pension plan as a result of participants electing lump sum payments. Alcoa recorded a $23 increase to Accrued pension benefits and a $12 decrease to Other noncurrent assets and recognized a non-cash settlement loss of $1 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations. Action #4 – In the third quarter of 2022, settlement accounting and a related plan remeasurement was triggered within Alcoa’s Australian pension plan as a result of participants electing lump sum payments. Alcoa recorded a $21 increase to Other noncurrent assets and recognized a non-cash settlement gain of $3 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations. Action #5 – In the fourth quarter of 2022, settlement accounting was triggered within Alcoa’s U.S. pension plans as a result of participants electing lump sum payments. Alcoa recorded a $3 increase to Accrued pension benefits and recognized a non-cash settlement loss of $6 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations. The following table presents certain information and the financial impacts of these actions on the accompanying Consolidated Financial Statements: Action # 1 2 3 4 5 Number of affected plan participants ~4,400 ~45 ~5 ~25 ~20 ~4,495 Weighted average discount rate as of prior plan remeasurement date 2.90% 2.90% 4.57% 2.46% N/A Plan remeasurement date July 31, 2022 July 31, 2022 September 30, 2022 September 30, 2022 December 31, 2022 Weighted average discount rate as of plan remeasurement date 4.63% 4.63% 5.71% 4.99% N/A Increase to accrued pension benefits liability(1) Increase (decrease) to other noncurrent assets(1) Settlement loss (gain)(2) $ $ 5 — 23 — 3 31 $ $ 27 — (12) 21 — 36 $ $ 617 11 1 (3) 6 632 (1) Actions 1-4 caused interim plan remeasurements, including an update to the discount rates used to determine the benefit obligations of the affected plans. These amounts include impacts due to interim plan remeasurements. (2) These amounts represent the net actuarial loss (gain) and were reclassified from Accumulated other comprehensive loss to Restructuring and other charges, net (see Note D) on the accompanying Statement of Consolidated Operations. 2021 Plan Actions. In 2021, management initiated the following actions to certain pension and other postretirement benefit plans: Action #1 – On March 31, 2021, Alcoa completed the sale of the Warrick Rolling Mill to Kaiser Aluminum Corporation for total consideration of $670, which included the assumption of $69 in other postretirement benefit liabilities. Approximately 1,150 employees at the rolling operations, which includes the casthouse, hot mill, cold mills, and coating and slitting lines, became employees of Kaiser. As a result, the affected plan was remeasured, including an update to the discount rate used to determine the benefit obligation of the plan. Accrued other postretirement benefits reflects a decrease of $40 related to the remeasurement in addition to the $69 assumed by Kaiser. Further, Alcoa recognized a curtailment gain of $17 (pre- and after-tax) and a settlement loss of $26 (pre- and after-tax). 107 Action #2 – In the second quarter of 2021, settlement accounting and a related plan remeasurement was triggered within Alcoa’s U.S. salaried pension plan as a result of a high number of participants electing lump sum payments. This includes former employees of the Warrick Rolling Mill, as well as other Alcoa employees making this election at retirement. Alcoa recorded a $90 decrease to Accrued pension benefits related to this remeasurement and recognized a settlement loss of $39 (pre- and after-tax). Action #3 – In the third quarter of 2021, settlement accounting and a related plan remeasurement was triggered within Alcoa’s U.S. salaried pension plan as a result of participants electing lump sum payments. Alcoa recorded a $7 increase to Accrued pension benefits related to this remeasurement and recognized a settlement loss of $7 (pre- and after-tax). Action #4 – In the third quarter of 2021, settlement accounting and a related plan remeasurement was triggered within Alcoa’s Australian pension plan as a result of participants electing lump sum payments. Alcoa recorded a $38 decrease to Accrued pension benefits related to this remeasurement and recognized a settlement loss of $1 (pre- and after-tax). Action #5 – In the fourth quarter of 2021, the Company purchased a group annuity contract to transfer the obligation to pay the remaining retirement benefits of approximately 800 retirees and deferred vested participants from one of its Suriname pension plans to an insurance company. The transfer of $55 in both plan obligations and plan assets were completed on October 19, 2021. As a result, the Company recorded a settlement loss of $63 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations in the fourth quarter of 2021. Action #6 – In the fourth quarter of 2021, settlement accounting and related plan remeasurements were triggered within Alcoa’s U.S. pension plans as a result of the Company purchasing group annuity contracts to transfer the obligation to pay remaining retirement benefits of approximately 14,000 retirees and beneficiaries from its U.S. defined benefit pension plans and transferred approximately $1,540 in both plan obligations and plan assets. The transfers were completed on November 23, 2021 and December 16, 2021. As a result, the Company recorded a $84 decrease to Accrued pension benefits related to this remeasurement and recognized a non-cash settlement loss of $848 (pre- and after-tax) in Restructuring and other charges, net on the Statement of Consolidated Operations in the fourth quarter of 2021. Action #7 – In the fourth quarter of 2021, settlement accounting and related plan remeasurements were triggered within Alcoa’s U.S. pension plans as a result of participants electing lump sum payments (and the group annuity contracts discussed in Action 6 above). Alcoa recorded a $1 decrease to Accrued pension benefits related to this remeasurement and recognized a settlement loss of $10 (pre- and after-tax). The following table presents certain information and the financial impacts of these actions on the accompanying Consolidated Financial Statements: Action # 1 2 3 4 5 6 7 Number of affected plan participants ~840 ~120 ~20 ~20 ~800 ~14,000 ~60 Weighted average discount rate as of prior plan remeasurement date 2.45% 2.38% 2.71% 1.34% N/A 2.59% 2.59% Plan remeasurement date March 31, 2021 June 30, 2021 September 30, 2021 September 30, 2021 N/A November 30, 2021 November 30, 2021 Weighted average discount rate as of plan remeasurement date 3.06% 2.71% 2.74% 1.53% N/A 2.79% 2.79% $ $ Increase (decrease) to accrued pension benefits liability Decrease to accrued other postretirement benefits liability Curtailment gain(1) Settlement loss(1) — $ (90) 7 (38) N/A (84) (1) (206) $ (106) — — — — — — (106) $ $ (17) — — — — — — (17) $ $ 26 39 7 1 63 848 10 994 (1) These amounts primarily represent the accelerated amortization of a portion of the existing prior service benefit for curtailments and net actuarial loss for settlements and were reclassified from Accumulated other comprehensive loss to Restructuring and other charges, net (see Note D) on the accompanying Statement of Consolidated Operations. 108 Obligations and Funded Status December 31, Change in benefit obligation Benefit obligation at beginning of year Service cost Interest cost Amendments Actuarial losses (gains) Settlements Benefits paid, net of participants’ contributions Suriname resident election transfer Foreign currency translation impact Benefit obligation at end of year Change in plan assets Fair value of plan assets at beginning of year Actual return on plan assets Employer contributions Participant contributions Benefits paid Administrative expenses Settlements Annuity purchase premium refund Foreign currency translation impact Fair value of plan assets at end of year Funded status Less: Amounts attributed to joint venture partners Net funded status Amounts recognized in the Consolidated Balance Sheet consist of: Noncurrent assets Current liabilities Noncurrent liabilities Net amount recognized Amounts recognized in Accumulated Other Comprehensive Loss consist of: Net actuarial loss Prior service cost (benefit) Total, before tax effect Less: Amounts attributed to joint venture partners Net amount recognized, before tax effect Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) consist of: Net actuarial loss (benefit) Amortization of accumulated net actuarial loss Prior service cost Amortization of prior service benefit Total, before tax effect Less: Amounts attributed to joint venture partners Net amount recognized, before tax effect Pension benefits Other postretirement benefits 2023 2022 2023 2022 $ $ $ $ $ $ $ $ $ $ $ $ 2,518 11 119 2 117 (280) (133) 12 27 2,393 $ $ $ 2,434 141 24 3 (125) (9) (280) 7 24 2,219 $ (174) $ (11) (163) $ $ 125 (10) (278) (163) $ 1,098 4 1,102 33 1,069 131 (49) 2 — 84 6 78 $ $ $ $ $ $ $ 4,594 13 107 — (803) (1,090) (211) — (92) 2,518 4,306 (528) 18 4 (204) (6) (1,090) 22 (88) 2,434 $ (84) $ (6) (78) $ $ 146 (11) (213) (78) $ 1,016 2 1,018 27 991 $ $ (141) $ (720) — — (861) (11) (850) $ 536 3 26 — (7) — (52) (12) — 494 $ $ — $ — — — — — — — — — $ (494) $ — (494) $ — $ (51) (443) (494) $ $ 88 (97) (9) — (9) $ (2) $ (5) — 14 7 — 7 $ 710 4 15 — (140) — (53) — — 536 — — — — — — — — — — (536) — (536) — (55) (481) (536) 95 (111) (16) — (16) (140) (18) — 14 (144) — (144) At December 31, 2023, the benefit obligation, fair value of plan assets, and funded status for U.S. pension plans were $1,119, $1,054, and ($65), respectively. At December 31, 2022, the benefit obligation, fair value of plan assets, and funded status for U.S. pension plans were $1,113, $1,064, and ($49), respectively. 109 Pension Plan Benefit Obligations The aggregate projected benefit obligation and accumulated benefit obligation for all defined benefit pension plans was as follows: Projected benefit obligation Accumulated benefit obligation The aggregate projected benefit obligation and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets was as follows: Projected benefit obligation Fair value of plan assets The aggregate accumulated benefit obligation and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets was as follows: Accumulated benefit obligation Fair value of plan assets Components of Net Periodic Benefit Cost Pension benefits 2023 2022 $ 2,393 2,285 $ 1,636 1,336 1,425 1,169 2,518 2,453 1,465 1,232 1,458 1,232 Service cost Interest cost(2) Expected return on plan assets(2) Recognized net actuarial loss(2) Amortization of prior service cost (benefit)(2) Settlements(3) Curtailments(4) Net periodic benefit cost(5) Pension benefits(1) 2022 2023 2021 Other postretirement benefits 2021 2022 2023 $ $ 10 114 (146) 28 — 21 — 27 $ $ 13 104 (151) 88 — 632 — 686 $ $ 22 116 (281) 190 — 968 — 1,015 $ $ 3 26 — 5 (14) — — 20 $ $ 4 15 — 18 (14) — — 23 $ $ 4 15 — 21 (14) 26 (17) 35 (1) In 2023, 2022, and 2021, net periodic benefit cost for U.S pension plans was $6, $698, and $962, respectively. (2) These amounts were reported in Other expenses (income), net on the accompanying Statement of Consolidated Operations. (3) These amounts were reported in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2023, 2022 and 2021, settlements were due to management actions (see Plan Actions above). (4) These amounts were reported in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2021, curtailments were due to management actions (see Plan Actions above). (5) Amounts attributed to joint venture partners are not included. Assumptions. Liabilities and expenses for pension and other postretirement benefits are determined using actuarial methodologies and incorporate significant assumptions, including the interest rate used to discount the future estimated liability, the expected long-term rate of return on plan assets, and several assumptions relating to the employee workforce (salary increases, health care cost trend rates, retirement age, and mortality). Weighted average assumptions used to determine benefit obligations for pension and other postretirement benefit plans were as follows: December 31, Discount rate—pension plans Discount rate—other postretirement benefit plans Rate of compensation increase—pension plans 2023 2022 5.03% 5.19 3.77 5.41% 5.54 3.21 The yield curve model used to develop the discount rate parallels the plans’ projected cash flows and has a weighted average duration of 10 years. The underlying cash flows of the high-quality corporate bonds included in the model exceed the cash flows needed to satisfy the Company’s plan obligations multiple times. If a deep market of high-quality corporate bonds does not exist in a country, then the yield on government bonds plus a corporate bond yield spread is used. 110 Weighted average assumptions used to determine net periodic benefit cost for pension and other postretirement benefit plans were as follows: Discount rate—pension plans Discount rate—other postretirement benefit plans Expected long-term rate of return on plan assets—pension plans Rate of compensation increase—pension plans 2023 2022 2021 5.34% 5.45 6.21 3.21 2.66% 2.46 4.94 3.11 1.91% 1.99 5.66 2.58 For 2023, 2022, and 2021, the expected long-term rate of return used by management was based on the prevailing and planned strategic asset allocations, as well as estimates of future returns by asset class. For 2024, management anticipates that 6.13% will be the weighted average expected long-term rate of return. Assumed health care cost trend rates for U.S. other postretirement benefit plans were as follows (non-U.S. plans are not material): Health care cost trend rate assumed for next year Rate to which the cost trend rate gradually declines Year that the rate reaches the rate at which it is assumed to remain 2023 2022 2021 6.5% 5.0% 2032 7.0% 5.0% 2028 5.5% 4.5% 2026 The assumed health care cost trend rate is used to measure the expected cost of gross eligible charges covered by the Company’s other postretirement benefit plans. For 2024, a 6.5% trend rate will be used, reflecting management’s best estimate of the change in future health care costs covered by the plans. Plan Assets. Alcoa’s pension plan weighted average target and actual asset allocations at December 31, 2023 and 2022, by asset class, were as follows: Asset class Equities Fixed income Other investments Total Target asset allocation 2022 2023 20% 65 15 100% 20% 65 15 100% Plan assets at December 31, 2023 2022 17% 70 13 100% 29% 57 14 100% The principal objectives underlying the investment of the pension plan assets are to ensure that the Company can properly fund benefit obligations as they become due under a broad range of potential economic and financial scenarios, maximize the long-term investment return with an acceptable level of risk based on such obligations, and broadly diversify investments across and within various asset classes to protect asset values against adverse movements. Investment risk is controlled by rebalancing to target allocations on a periodic basis and ongoing monitoring of investment manager performance. The portfolio includes an allocation to investments in long-duration corporate credit and government debt, public and private market equities, intermediate duration corporate credit and government debt, global-listed infrastructure, high-yield bonds and bank loans, real estate, and securitized credit. In late 2022, management began restructuring the asset portfolios of certain non-U.S. pension plans. The new strategy increased the amount and duration of the fixed income asset portfolios to reduce exposure to interest rates and was substantially implemented at the end of the first quarter in 2023. Investment practices comply with the requirements of applicable laws and regulations in the respective jurisdictions, including the Employee Retirement Income Security Act of 1974 (ERISA) in the United States. The following section describes the valuation methodologies used by the trustees to measure the fair value of pension plan assets. For plan assets measured at net asset value, this refers to the net asset value of the investment on a per share basis (or its equivalent) as a practical expedient. Otherwise, an indication of the level in the fair value hierarchy in which each type of asset is generally classified is provided (see Note P for the definition of fair value and a description of the fair value hierarchy). Equities—These securities consist of: (i) direct investments in the stock of publicly traded U.S. and non-U.S. companies and are valued based on the closing price reported in an active market on which the individual securities are traded (generally classified in Level 1); (ii) the plans’ share of commingled funds that are invested in the stock of publicly traded companies and are valued at net 111 asset value; and (iii) direct investments in long/short equity hedge funds and private equity (limited partnerships and venture capital partnerships) and are valued at net asset value. Fixed income—These securities consist of: (i) U.S. government debt and are generally valued using quoted prices (included in Level 1); (ii) cash and cash equivalents invested in publicly-traded funds and are valued based on the closing price reported in an active market on which the individual securities are traded (generally classified in Level 1); (iii) publicly traded U.S. and non-U.S. fixed interest obligations (principally corporate bonds and debentures) and are valued through consultation and evaluation with brokers in the institutional market using quoted prices and other observable market data (included in Level 2); and (iv) cash and cash equivalents invested in institutional funds and are valued at net asset value. Other investments—These investments include, among others: (i) real estate investment trusts valued based on the closing price reported in an active market on which the investments are traded (included in Level 1); (ii) the plans’ share of commingled funds that are invested in real estate partnerships and are valued at net asset value; (iii) direct investments in private real estate (includes limited partnerships) and are valued at net asset value; and (iv) absolute return strategy funds and are valued at net asset value. The fair value methods described above may not be indicative of net realizable value or reflective of future fair values. Additionally, while Alcoa believes the valuation methods used by the plans’ trustees are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. The following table presents the fair value of pension plan assets classified under either the appropriate level of the fair value hierarchy or net asset value: December 31, 2023 Equities: Equity securities Private equity Fixed income: Intermediate and long-duration government/credit Cash and cash equivalent funds Other investments: Real estate Other Total(1) December 31, 2022 Equities: Equity securities Long/short equity hedge funds Private equity Fixed income: Intermediate and long-duration government/credit Cash and cash equivalent funds Other investments: Real estate Other Total(2) Level 1 Level 2 Level 3 Net Asset Value Total $ $ $ $ $ $ $ $ $ $ $ $ $ $ 108 — 108 403 14 417 21 — 21 546 Level 1 71 — — 71 390 38 428 20 — 20 519 $ $ $ $ $ $ $ $ $ $ $ $ $ $ — $ — — $ 517 — 517 $ $ — $ — — $ $ 517 — $ — — $ — $ — — $ 134 127 261 496 114 610 — $ — — $ — $ 253 19 272 1,143 Net Asset Value Level 2 Level 3 — $ — — — $ 426 — 426 $ $ — $ — — $ $ 426 — $ — — — $ — $ — — $ — $ — — $ — $ 480 8 145 633 420 118 538 282 28 310 1,481 $ $ $ $ $ $ $ $ $ $ $ $ $ $ 242 127 369 1,416 128 1,544 274 19 293 2,206 Total 551 8 145 704 1,236 156 1,392 302 28 330 2,426 (1) As of December 31, 2023, the total fair value of pension plan assets excludes a net receivable of $13, which primarily represents securities not yet settled plus interest and dividends earned on various investments. (2) As of December 31, 2022, the total fair value of pension plan assets excludes a net receivable of $8, which primarily represents securities not yet settled plus interest and dividends earned on various investments. 112 Funding and Cash Flows. It is Alcoa’s policy to fund amounts for defined benefit pension plans sufficient to meet the minimum requirements set forth in applicable country benefits laws and tax laws, including ERISA for U.S. plans. From time to time, the Company contributes additional amounts as deemed appropriate. In 2023, 2022, and 2021, cash contributions to Alcoa’s defined benefit pension plans were $24, $17, and $579. During 2021, Alcoa made $500 in unscheduled contributions to certain U.S. defined benefit pension plans. The additional contributions were discretionary in nature and were funded with net proceeds from a March 2021 debt issuance (see Note M) plus available cash on hand. There were no discretionary contributions made in 2022 or 2023. Alcoa’s minimum required contribution to defined benefit pension plans in 2024 is estimated to be $60, of which approximately $40 is for U.S. plans. Under ERISA regulations, a plan sponsor that establishes a pre-funding balance by making discretionary contributions to a U.S. defined benefit pension plan may elect to apply all or a portion of this balance toward its minimum required contribution obligations to the related plan in future years. In 2024, management intends to make such election related to the Company’s U.S. plans. Benefit payments expected to be paid to pension and other postretirement benefit plan participants are as follows: Year ending December 31, 2024 2025 2026 2027 2028 2029 through 2033 Defined Contribution Plans Pension benefits Other postretirement benefits $ $ 180 175 175 180 175 855 1,740 $ $ 50 50 45 45 45 195 430 The Company sponsors savings and investment plans in several countries, primarily in Australia and the United States. In the United States, employees may contribute a portion of their compensation to the plans, and Alcoa matches a specified percentage of these contributions in equivalent form of the investments elected by the employee. Also, the Company makes contributions to a retirement savings account based on a percentage of eligible compensation for certain U.S. employees that are not able to participate in Alcoa’s defined benefit pension plans. The Company’s expenses related to all defined contribution plans were $80 in 2023, $71 in 2022, and $72 in 2021. Member-funded Pension Plans The Company contributes to member-funded pension plans for the employees of Aluminerie de Bécancour Inc. and Aluminerie de Deschambault in Canada. Alcoa makes contributions to the plans based on a percentage of the employees’ eligible compensation. The Company’s expenses related to the member-funded pension plans were $16 in 2023, $17 in 2022, and $17 in 2021. Target Benefit Plan The Company contributes to a target benefit plan for the employees of Baie-Comeau in Canada. Alcoa makes contributions to the plan based on a percentage of the employees’ eligible compensation. The Company’s expenses related to the target benefit plan were $8 in 2023, $9 in 2022, and $9 in 2021. 113 P. Derivatives and Other Financial Instruments Fair Value. The Company follows a fair value hierarchy to measure its assets and liabilities. As of December 31, 2023 and 2022, respectively, the assets and liabilities measured at fair value on a recurring basis were primarily derivative instruments. In addition, the Company measures its pension plan assets at fair value (see Note O). Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy distinguishes between (i) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (ii) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy are described below: • Level 1—Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2—Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates); and inputs that are derived principally from or corroborated by observable market data by correlation or other means; and, • Level 3—Inputs that are both significant to the fair value measurement and unobservable. Derivatives. Alcoa Corporation is exposed to certain risks relating to its ongoing business operations, including the risks of changing commodity prices, foreign currency exchange rates and interest rates. Alcoa Corporation’s commodity and derivative activities include aluminum, energy, foreign exchange, and interest rate contracts, which are held for purposes other than trading. They are used to mitigate uncertainty and volatility, and to cover underlying exposures. While Alcoa does not generally enter into derivative contracts to mitigate the risk associated with changes in aluminum price, the Company may do so in isolated cases to address discrete commercial or operational conditions. Alcoa is not involved in trading activities for energy, weather derivatives, or other nonexchange commodities. Alcoa Corporation’s commodity and derivative activities are subject to the management, direction, and control of the Strategic Risk Management Committee (SRMC), which consists of at least three members, including the chief executive officer, the chief financial officer, and the chief commercial officer. The remaining member(s) are other officers and/or employees of the Company as the chief executive officer may designate from time to time. The SRMC meets on a periodic basis to review derivative positions and strategy and reports to the Audit Committee of Alcoa Corporation’s Board of Directors on the scope of its activities. Alcoa Corporation’s aluminum and foreign exchange contracts are predominately classified as Level 1 under the fair value hierarchy. All of the Level 1 contracts are designated as either fair value or cash flow hedging instruments (except as described below). Alcoa Corporation also has several derivative instruments classified as Level 3 under the fair value hierarchy, which are either designated as cash flow hedges or undesignated. Alcoa includes the changes in its equity method investee’s Level 2 derivatives in Accumulated other comprehensive loss. The following tables present the detail for Level 1 and 3 derivatives (see additional Level 3 information in further tables below): Balance at December 31, Level 1 derivative instruments Level 3 derivative instruments Total Less: Current Noncurrent Assets $ $ $ 2023 16 16 32 29 3 $ $ $ 2023 Liabilities Assets 9 1,297 1,306 214 1,092 $ $ $ 2022 84 52 136 134 2 $ $ $ 2022 Liabilities 14 1,212 1,226 200 1,026 Year ended December 31, Level 1 derivative instruments Level 3 derivative instruments Noncontrolling and equity interest (Level 2) Total Unrealized gain (loss) recognized in Other comprehensive loss 31 $ (326) — (295) $ $ $ Realized gain (loss) reclassed from Other comprehensive loss to earnings Unrealized gain (loss) recognized in Other comprehensive loss Realized gain (loss) reclassed from Other comprehensive loss to earnings $ 86 (221) 5 (130) $ $ 116 (247) 12 (119) $ 35 (345) (6) (316) 114 The 2023 realized gain of $86 on Level 1 cash flow hedges was comprised of a $91 gain recognized in Sales and a $5 loss recognized in Cost of goods sold. The 2022 realized gain of $35 on Level 1 cash flow hedges was comprised of a $40 gain recognized in Sales and a $5 loss recognized in Cost of goods sold. The following table presents the outstanding quantities of derivative instruments classified as Level 1: Aluminum (in kmt) Aluminum (in kmt) Foreign currency (in millions of euro) Foreign currency (in millions of euro) Foreign currency (in millions of Norwegian krone) Foreign currency (in millions of Brazilian real) Foreign currency (in millions of Brazilian real) Foreign currency (in millions of Canadian dollar) Classification Commodity buy forwards Commodity sell forwards Foreign exchange buy forwards Foreign exchange sell forwards Foreign exchange buy forwards Foreign exchange buy forwards Foreign exchange sell forwards Foreign exchange buy forwards December 31, 2023 78 46 48 9 138 467 — 31 December 31, 2022 176 337 60 — 302 1,008 7 — Alcoa routinely uses Level 1 aluminum derivative instruments to manage exposures to changes in the fair value of firm commitments for the purchases or sales of aluminum. Additionally, Alcoa uses Level 1 aluminum derivative instruments to manage exposures to changes in the LME associated with the Alumar (Brazil) restart (April 2022 through December 2023) and the San Ciprián (Spain) strike (expired October 2022). As a result of delays with the Alumar restart, it became probable that certain of the original forecasted transactions would not occur by the end of the originally specified time period and Alcoa dedesignated certain aluminum sell forwards. The Company reclassified the related unrealized gain of $11 and $20 included in Accumulated other comprehensive loss to Sales during the year ended December 31, 2023 and 2022, respectively. In conjunction with the dedesignations, the Company entered into aluminum buy forwards in 2023 and 2022 for the same volume and periods which were also not designated. The unrealized and realized gains and losses on the aluminum buy and sell forwards that are not designated offset resulting in no impact to Alcoa’s earnings. Alcoa Corporation uses Level 1 foreign exchange forward contracts to mitigate the risk of foreign exchange exposure related to euro power purchases in Norway (expires December 2026), U.S. dollar aluminum sales in Norway (expires June 2025), U.S. dollar alumina and aluminum sales in Brazil (expires August 2025), and U.S. dollar aluminum sales in Canada (expires March 2025). Derivative instruments classified as Level 3 in the fair value hierarchy represent those in which management has used at least one significant unobservable input in the valuation model. Alcoa Corporation uses a discounted cash flow model to fair value all Level 3 derivative instruments. Inputs in the valuation models for Level 3 derivative instruments are composed of the following: (i) quoted market prices (e.g., aluminum prices on the 10-year LME forward curve and energy prices), (ii) significant other observable inputs (e.g., information concerning time premiums and volatilities for certain option type embedded derivatives and regional premiums for aluminum contracts), and (iii) unobservable inputs (e.g., aluminum and energy prices beyond those quoted in the market, and estimated credit spread between Alcoa and the counterparty). For periods beyond the term of quoted market prices for aluminum, Alcoa Corporation estimates the price of aluminum by extrapolating the 10-year LME forward curve. For periods beyond the term of quoted market prices for the Midwest premium, management estimates the Midwest premium based on recent transactions. Where appropriate, valuations are adjusted for various factors such as liquidity, bid/offer spreads, and credit considerations. Such adjustments are generally based on available market evidence (Level 2). In the absence of such evidence, management’s best estimate is used (Level 3). If a significant input that is unobservable in one period becomes observable in a subsequent period, the related asset or liability would be transferred to the appropriate classification (Level 1 or 2) in the period of such change (there were no such transfers in the periods presented). There were no sales or settlements of Level 3 derivative instruments in the periods presented. 115 Level 3 derivative instruments outstanding as of December 31, 2023 are described in the table below: Description Power contracts Embedded derivative that indexes the price of power to the LME price of aluminum plus the Midwest premium Embedded derivative that indexes the price of power to the LME price of aluminum Embedded derivative that indexes the price of power to the credit spread between the Company and the counterparty Financial contracts Hedge power prices Designation Cash flow hedge of forward sales of aluminum Cash flow hedge of forward sales of aluminum Not designated Contract Termination March 2026 December 2029 February 2036 September 2027 October 2028 Unobservable Inputs Impacting Valuation LME price, Midwest premium and MWh per year LME price and MWh per year Estimated credit spread Sensitivity to Inputs Increase in LME price and/or the Midwest premium results in a higher cost of power and an increase to the derivative liability Increase in LME price results in a higher cost of power and an increase to the derivative liability Wider credit spread results in a higher cost of power and increase in the derivative liability Not designated June 2035 LME price and power price Lower prices in the power market or higher LME prices result in an increase in the derivative liability In December 2022, Alcoa entered into a financial contract with a counterparty to hedge power price exposure through March 31, 2023. The Financial contract was designated as a cash flow hedge of future sales of power. Unrealized gains and losses were recognized in Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheet, and realized gains and losses were recognized in Cost of goods sold on the accompanying Statement of Consolidated Operations. In addition to the instruments presented above, Alcoa had a financial contract that expired in July 2021 that hedged the anticipated power requirements at one of its smelters and was designated as a cash flow hedge of future purchases of electricity. In March 2021, Alcoa entered into four financial contracts (Financial contracts (undesignated), below) with three counterparties to hedge the anticipated power requirements at this smelter for the period from August 1, 2021 through June 30, 2026. A fifth financial contract (undesignated) was entered into in November 2021, with an effective date of September 30, 2022 through June 30, 2026. In August 2023, the Company entered into a nine-year financial contract (undesignated) effective July 1, 2026 when the current contracts end. Three of these financial contracts include LME-linked pricing components and do not qualify for hedge accounting treatment. Management elected not to apply hedge accounting treatment for the other three financial contracts. Unrealized and realized gains and losses on these financial contracts are included in Other expenses (income), net on the accompanying Statement of Consolidated Operations. At December 31, 2023, the outstanding Level 3 instruments are associated with seven smelters. At December 31, 2023 and 2022, the power contracts with embedded derivatives designated as cash flow hedges hedge forecasted aluminum sales of 1,456 kmt and 1,683 kmt, respectively. 116 The following table presents quantitative information related to the significant unobservable inputs described above for Level 3 derivative instruments (megawatt hours in MWh): December 31, 2023 Unobservable Input Unobservable Input Range Interrelationship of forward energy price, LME forward price and the Consumer Price Index Electricity (per MWh) LME (per mt) 2024: $50.99 2024: $53.55 2024: $2,352 2024: $2,424 16 16 Asset Derivatives Financial contract (undesignated) Total Asset Derivatives Liability Derivatives Power contract $ $ $ 197 MWh of energy needed to produce the LME (per mt) forecasted mt of aluminum Power contracts 1,100 MWh of energy needed to produce the forecasted mt of aluminum Power contract Power contract (undesignated) Total Liability Derivatives — MWh of energy needed to produce the forecasted mt of aluminum — Estimated spread between the 30-year debt yield of Alcoa and the counterparty $ 1,297 Electricity LME (per mt) Midwest premium (per pound) Electricity LME (per mt) Midwest premium (per pound) Electricity Credit spread 2024: $2,352 2027: $2,796 Rate of 4 million MWh per year 2024: $2,352 2029: $2,904 2036: $3,153 2024: $0.1880 2029: $0.2300 2036: $0.2300 Rate of 18 million MWh per year 2024: $2,352 2024: $2,381 2024: $0.1880 2024: $0.2140 Rate of 2 million MWh per year 1.15%: 30-year debt yield spread 6.33%: Alcoa (estimated) 5.18%: counterparty The fair values of Level 3 derivative instruments recorded in the accompanying Consolidated Balance Sheet were as follows: Asset Derivatives Derivatives designated as hedging instruments: Current—financial contract Total derivatives designated as hedging instruments Derivatives not designated as hedging instruments: Current—financial contract Total derivatives not designated as hedging instruments Total Asset Derivatives Liability Derivatives Derivatives designated as hedging instruments: Current—power contracts Noncurrent—power contracts Total derivatives designated as hedging instruments Total Liability Derivatives December 31, 2023 December 31, 2022 $ $ $ $ $ $ $ $ — $ — $ 16 16 16 210 1,087 1,297 1,297 $ $ $ $ $ $ 20 20 32 32 52 195 1,017 1,212 1,212 The following table shows the net fair values of the Level 3 derivative instruments at December 31, 2023 and the effect on these amounts of a hypothetical change (increase or decrease of 10%) in the market prices or rates that existed as of December 31, 2023: Power contracts Embedded credit derivative Financial contracts Fair value asset (liability) Index change of + / -10% $ $ (1,297) - 16 300 - 8 117 The following tables present a reconciliation of activity for Level 3 derivative instruments: 2023 January 1, 2023 Total gains or losses included in: Sales (realized) Cost of goods sold (realized) Other expenses, net (unrealized/realized) Other comprehensive income (unrealized) Settlements and other December 31, 2023 Change in unrealized gains or losses included in earnings for derivative instruments held at December 31, 2023: Other expenses, net 2023 January 1, 2023 Total gains or losses included in: Sales (realized) Other comprehensive income (unrealized) December 31, 2023 2022 January 1, 2022 Total gains or losses included in: Sales (realized) Other income, net (unrealized/realized) Other comprehensive income (unrealized) Settlements and other December 31, 2022 Change in unrealized gains or losses included in earnings for derivative instruments held at December 31, 2022: Other income, net 2022 January 1, 2022 Total gains or losses included in: Sales (realized) Other income, net (unrealized/realized) Other comprehensive (income) loss (unrealized) December 31, 2022 Change in unrealized gains or losses included in earnings for derivative instruments held at December 31, 2022: Other income, net Power contracts Financial contracts Assets — $ (4) — — 4 — — $ — $ $ $ $ $ $ Liabilities Power contracts Assets Financial contracts 52 — (20) (5) — (11) 16 (5) 1,212 (245) 330 1,297 2 — 171 20 (141) 52 171 Liabilities Power contracts Embedded credit derivative 1,290 $ (345) — 267 1,212 $ — $ 3 — (3) — — (3) $ $ $ $ $ $ Derivatives Designated As Hedging Instruments—Cash Flow Hedges Assuming market rates remain constant with the rates at December 31, 2023, a realized loss of $210 related to power contracts is expected to be recognized in Sales over the next 12 months. Material Limitations The disclosures with respect to commodity prices and foreign currency exchange risk do not consider the underlying commitments or anticipated transactions. If the underlying items were included in the analysis, the gains or losses on the futures contracts may be offset. Actual results will be determined by several factors that are not under Alcoa Corporation’s control and could vary significantly from those factors disclosed. 118 Alcoa Corporation is exposed to credit loss in the event of nonperformance by counterparties on the above instruments, as well as credit or performance risk with respect to its hedged customers’ commitments. Alcoa Corporation does not anticipate nonperformance by any of these parties. Contracts are with creditworthy counterparties and are further supported by cash, treasury bills, or irrevocable letters of credit issued by carefully chosen banks. In addition, various master netting arrangements are in place with counterparties to facilitate settlement of gains and losses on these contracts. Other Financial Instruments. The carrying values and fair values of Alcoa Corporation’s other financial instruments were as follows: December 31, Cash and cash equivalents Restricted cash Short-term borrowings Long-term debt due within one year Long-term debt, less amount due within one year 2023 2022 Carrying value Fair value Carrying value Fair value $ $ 944 103 56 79 1,732 $ 944 103 56 79 1,702 $ 1,363 111 — 1 1,806 1,363 111 — 1 1,744 Cash and cash equivalents and Restricted cash. The carrying amounts approximate fair value because of the short maturity of the instruments. The fair value amounts for Cash and cash equivalents and Restricted cash were classified in Level 1 of the fair value hierarchy. Short-term borrowings and Long-term debt, including amounts due within one year. The fair value of Long-term debt, less amount due within one year was based on quoted market prices for public debt and on interest rates that are currently available to Alcoa Corporation for issuance of debt with similar terms and maturities for non-public debt. The fair value amounts for all Short- term borrowings and Long-term debt were classified in Level 2 of the fair value hierarchy. Q. Income Taxes Provision for income taxes. The components of (Loss) income before income taxes were as follows: Domestic Foreign Total Provision for income taxes consisted of the following: Current: Federal Foreign State and local Deferred: Federal Foreign State and local Total Federal includes U.S. income taxes related to foreign income. 2023 2022 2021 (277) $ (307) (584) $ (652) $ 1,354 702 $ (663) 1,862 1,199 2023 2022 2021 — $ 211 — 211 $ — (22) — (22) $ $ 189 — $ 445 — 445 $ (3) 222 — 219 664 $ $ 8 473 1 482 6 141 — 147 629 $ $ $ $ $ $ 119 A reconciliation of the U.S. federal statutory rate to Alcoa’s effective tax rate was as follows: U.S. federal statutory rate Taxes on foreign operations—rate differential Tax credits Adjustment of prior year income taxes Noncontrolling interest Internal legal entity reorganizations Tax holidays Impacts of the U.S. Tax Cuts and Jobs Act of 2017 Uncertain tax positions Equity loss Tax on foreign operations—other Changes in valuation allowances Other Effective tax rate 2023 2022 2021 21.0% 7.1 1.4 0.3 0.2 0.2 0.1 — (0.1) (5.3) (6.1) (50.8) (0.4) (32.4%) 21.0% 9.9 (0.2) — 0.8 (9.0) (5.2) — 0.4 (2.0) 1.3 76.7 0.9 94.6% 21.0% 10.8 — — 0.5 — (2.8) 2.0 — (2.5) 1.7 23.4 (1.6) 52.5% Certain income earned by AWAB is eligible for a tax holiday, which decreases the tax rate on this income from 34% to 15.25%, which will result in future cash tax savings. The holiday related to production at the Alumar refinery was originally expected to end on December 31, 2027. During 2023, it was extended to December 31, 2032. The holiday related to the operation of the Juruti (Brazil) bauxite mine will end on December 31, 2026. In 2021, it was determined that the deferred taxes associated with income subject to the tax holiday would be fully exhausted within the holiday period and the amounts were therefore maintained on the balance sheet at the holiday tax rate. In 2022, the Company’s projection of the reversal of deferred tax assets during the holiday tax period was lowered, and as a result, the remainder was revalued at the statutory rate of 34%, resulting in a discrete income tax benefit of $33, which is included in Tax holidays, above. In 2023, the Company determined that it was no longer more likely than not that the deferred tax asset at AWAB would be realized and recorded a full valuation allowance against the deferred tax asset (see below). As a result, the amount reflected in Tax holidays, above, is zero with respect to AWAB as of December 31, 2023. In October 2022, Alcoa completed the liquidation of Alcoa Saudi Rolling Inversiones S.L. (ASRI), a wholly owned subsidiary that previously held the Company’s investment in MRC. This liquidation resulted in a deductible loss in the Netherlands and a tax benefit of $94 was recognized in 2022, however, this tax benefit was substantially offset by a valuation allowance. In December 2022, Alcoa commenced an internal reorganization to reduce its number of legal entities in Norway from four to one to simplify accounting and treasury functions and reduce external costs. As a result of the simplification, the Company recorded a deferred tax expense of $30 in 2022. Deferred income taxes. The components of deferred tax assets and liabilities based on the underlying attributes without regard to jurisdiction were as follows: December 31, Tax loss carryforwards Employee benefits Derivatives and hedging activities Loss provisions Interest Depreciation Investment basis differences Lease assets and liabilities Tax credit carryforwards Deferred income/expense Other Valuation allowance Total $ $ $ 2023 2022 Deferred tax assets Deferred tax liabilities Deferred tax assets Deferred tax liabilities — $ — 10 — 6 318 — 33 — 131 — 498 — 498 $ $ 1,781 297 283 174 127 128 75 24 23 10 36 2,958 (2,333) 625 $ $ $ — — 24 — 2 336 — 23 — 153 — 538 — 538 2,042 312 312 161 142 94 78 34 24 16 25 3,240 (2,595) 645 $ $ $ 120 The following table details the expiration periods of the deferred tax assets presented above: December 31, 2023 Tax loss carryforwards Tax credit carryforwards Other Valuation allowance Total $ $ Expires within 10 years Expires within 11-20 years No expiration Other Total $ 203 24 (1) (226) $ 333 — — (333) — $ — $ 1,471 — 154 (1,613) 12 $ $ 35 — 1,021 (423) 633 $ $ 2,042 24 1,174 (2,595) 645 Deferred tax assets with no expiration may still have annual limitations on utilization. Other represents deferred tax assets whose expiration is dependent upon the reversal of the underlying temporary difference. The total deferred tax asset (net of valuation allowance) is supported by projections of future taxable income exclusive of reversing temporary differences and taxable temporary differences that reverse within the carryforward period. The composition of Alcoa’s net deferred tax asset by jurisdiction as of December 31, 2023 was as follows: Deferred tax assets Valuation allowance Deferred tax liabilities Total Domestic Foreign Total $ $ $ 1,050 (988) (62) — $ 2,190 (1,607) (436) 147 $ $ 3,240 (2,595) (498) 147 The Company has several income tax filers in various foreign countries. Of the $147 net deferred tax asset included under the Foreign column in the table above, approximately 90% relates to six of Alcoa’s income tax filers (the Foreign Filers) as follows: a $135 net deferred tax asset for Alcoa Canada Company in Canada; a $90 net deferred tax asset for Alcoa-Lauralco Management Company in Canada; a $39 net deferred tax asset for Alcoa Wolinbec Company in Canada; a $19 net deferred tax asset for Alcoa Islandi and a $35 net deferred tax asset for Fjarðaál, both in Iceland; and a $185 net deferred tax liability for AofA in Australia. The future realization of the net deferred tax asset for each of the Foreign Filers was based on projections of the respective future taxable income (defined as the sum of pretax income, other comprehensive income, and permanent tax differences), exclusive of reversing temporary differences and carryforwards. The realization of the net deferred tax assets of the Foreign Filers is not dependent on any future tax planning strategies. Accordingly, management concluded that the net deferred tax assets of the Foreign Filers referenced above will more likely than not be realized in future periods, resulting in no need for a partial or full valuation allowance as of December 31, 2023. In December 2023, Alcoa recorded a valuation allowance of $154 against the net deferred tax assets of AWAB, of which $106 related to the balance as of December 31, 2022. The 2023 full valuation allowance for AWAB was a result of AWAB’s three-year cumulative loss position for the period ended December 31, 2023. The majority of AWAB’s net deferred tax assets relate to prior net operating losses; the loss carryforwards are not subject to an expiration period. AWAB’s profitability in future periods could prompt the Company to evaluate the realizability of the deferred tax asset and assess the possibility of a reversal of the valuation allowance, which could have a significant impact on net income in the quarter the valuation allowance is reversed. The Company’s subsidiaries in Iceland had a full valuation allowance recorded against deferred tax assets, which was established in 2015 and 2017, as the Company believed it was more likely than not that these tax benefits would not be realized. During 2023, after considering all positive and negative evidence, including the expectation that the jurisdiction will remain in a three-year cumulative income position, the Company determined that it is more likely than not that the net deferred tax assets will be realized. Based on this conclusion, the Company reversed the valuation allowance totaling $58 during 2023, generating a non-cash benefit from income taxes. 121 In December 2022, Alcoa recorded a valuation allowance of $217 against the net deferred tax assets of Alcoa Alumínio (Alumínio), of which $150 related to the balance as of December 31, 2021. The 2022 full valuation allowance for Alumínio was a result of Alumínio’s three-year cumulative loss position for the period ended December 31, 2022. Although the Company entered into aluminum contracts to manage exposures associated with the restart, these contracts were held by another legal entity, and the associated realized gains are not available to Alumínio to offset the restart losses. While management believes Alumínio will return to profitability in the future with the restart of the Alumar smelter, current volatility in the market does not provide a reliable basis for concluding that it is more likely than not that Alumínio’s net deferred tax assets, which consist primarily of tax loss carryforwards with indefinite life, will be realized. Alumar smelter profitability in future periods could prompt the Company to evaluate the realizability of the deferred tax asset and assess the possibility of a reversal of the valuation allowance, which could have a significant impact on net income in the quarter the valuation allowance is reversed. In 2021, Alcoa recorded a valuation allowance of $103 against the net deferred tax assets of Alúmina Española, S.A. (Española). Management concluded that it was more likely than not that Española’s net deferred tax assets, which consisted primarily of tax loss carryforwards, would not be realized as the entity’s sole operating asset, the San Ciprián refinery, was in a three-year cumulative loss position for the period ended December 31, 2021. This cumulative loss position was the result of recent operating losses due to the high energy costs in Spain and the impact of the refinery workers’ strike on the fourth quarter of 2021. After weighing all available positive and negative evidence as of December 31, 2023, management’s position continues to be that it is more likely than not that Alcoa Corporation will not realize the benefit of these deferred tax assets and continues to have a full valuation allowance recorded against the deferred tax assets. The following table details the changes in the valuation allowance: December 31, Balance at beginning of year Establishment of new allowances(1) Net change to existing allowances(2) Foreign currency translation Balance at end of year 2023 2022 2021 (2,333) $ (106) (113) (43) (2,595) $ (2,062) $ (150) (151) 30 (2,333) $ (2,127) (103) 139 29 (2,062) $ $ (1) Reflects valuation allowances initially established as a result of a change in management’s judgment regarding the realizability of deferred tax assets. (2) Reflects movements in previously established valuation allowances, which increase or decrease as the related deferred tax assets increase or decrease. Such movements occur as a result of a change in management’s judgment regarding previously established valuation allowances, remeasurement due to a tax rate change and changes in the underlying attributes of the deferred tax assets, including expiration of the attribute and reversal of the temporary difference that gave rise to the deferred tax asset. Undistributed net earnings. Certain earnings of Alcoa’s foreign subsidiaries are deemed to be permanently reinvested outside the United States. The cumulative amount of Alcoa’s foreign undistributed net earnings deemed to be permanently reinvested was approximately $2,676 as of December 31, 2023. Alcoa Corporation has several commitments and obligations related to the Company’s operations in various foreign jurisdictions; therefore, management has no plans to distribute such earnings in the foreseeable future. Alcoa Corporation continuously evaluates its local and global cash needs for future business operations and anticipated debt facilities, which may influence future repatriation decisions. If these earnings were distributed in the form of dividends or otherwise, Alcoa could be subject to foreign income or withholding taxes and state income taxes. Due to the uncertainty of the manner in which the undistributed earnings would be brought back to the United States and the tax laws in effect at that time, it is not practicable to estimate the tax liability that might be incurred if such earnings were remitted to the U.S. 122 Unrecognized tax benefits. Alcoa and its subsidiaries file income tax returns in the U.S. federal jurisdiction and various foreign and U.S. state jurisdictions. With few exceptions, the Company is not subject to income tax examinations by tax authorities for years prior to 2014. The U.S. federal income tax filings of the Company’s U.S. consolidated tax group have been examined through the 2018 tax year. Foreign jurisdiction tax authorities are in the process of examining income tax returns of several of Alcoa’s subsidiaries for various tax years. Excluding the Australia tax matter discussed in Note S, the period under foreign examination includes the income tax years from 2014 through 2022. For U.S. state income tax purposes, the Company and its subsidiaries remain subject to income tax examinations for the 2017 tax year and forward. In the third quarter of 2020, AofA paid approximately $74 (A$107) to the ATO related to the tax dispute described in Note S. Upon payment, AofA recorded a noncurrent prepaid tax asset, as the Company continues to believe it is more likely than not that AofA’s tax position will be sustained and therefore is not recognizing any tax expense in relation to this matter. In accordance with Australian tax laws, the initial interest assessment and additional interest are deductible against AofA’s taxable income. AofA applied this deduction beginning in the third quarter of 2020, reducing cash tax payments. Interest compounded in future years is also deductible against AofA’s income in future periods. If AofA is ultimately successful, the interest deduction would become taxable as income in the year the dispute is resolved. In addition, should the ATO decide in the interim to reduce any interest already assessed, the reduction would be taxable as income at that point in time. During 2023, AofA continued to record its tax provision and tax liability without effect of the ATO assessment, since it expects to prevail. The tax payable will remain on AofA’s balance sheet as a noncurrent liability, increased by the tax effect of subsequent periods’ interest deductions, until dispute resolution, which is expected to take several years. The noncurrent liability resulting from the cumulative interest deductions was approximately $199 (A$293) and $174 (A$260) at December 31, 2023 and 2022, respectively. The reserve balance for unrecognized tax benefits is included in Noncurrent income taxes on the Consolidated Balance Sheet. A reconciliation of the beginning and ending amount of unrecognized tax benefits (excluding interest and penalties) was as follows: December 31, Balance at beginning of year Additions for tax positions of prior years Reductions for tax positions of prior years Expiration of the statute of limitations Foreign currency translation Balance at end of year 2023 2022 2021 5 — — — — 5 $ $ 4 2 — (1) — 5 $ $ 4 — — — — 4 $ $ For all periods presented, a portion of the balance at end of year pertains to state tax liabilities, which are presented before any offset for federal tax benefits. The effect of unrecognized tax benefits, if recorded, that would impact the annual effective tax rate for 2023, 2022, and 2021 would be 1%, 1%, and 0%, respectively, of (Loss) income before income taxes. Alcoa does not anticipate that changes in its unrecognized tax benefits will have a material impact on the Statement of Consolidated Operations during 2024. It is the Company’s policy to recognize interest and penalties related to income taxes as a component of the Provision for income taxes on the accompanying Statement of Consolidated Operations. In 2023, 2022, and 2021 Alcoa recognized $1, $1, and $0, in interest and penalties, respectively. Due to the expiration of the statute of limitations, settlements with tax authorities, and refunded overpayments, the Company also recognized interest income of $1, $1, and $0 in 2023, 2022, and 2021, respectively. As of December 31, 2023 and 2022, the amount accrued for the payment of interest and penalties was $4 and $3, respectively. Other Matters. On August 16, 2022, the U.S. enacted the Inflation Reduction Act of 2022 (IRA), which includes a 15% minimum tax on book income of certain large corporations, a 1% excise tax on net stock repurchases after December 31, 2022, and several tax incentives to promote clean energy. As a result of the provisions of the IRA, we will incur an excise tax of 1% for certain common stock repurchases made subsequent to December 31, 2022, which will be reflected in the cost of purchasing the underlying shares. The minimum corporate tax did not have an impact on the Company for 2023 and will not have an impact on the Company for 2024. The IRA contains a number of tax credits and other incentives for investments in renewable energy production, carbon capture, and other climate-related actions, as well as the production of critical minerals. In December 2023, the U.S. Treasury issued guidance on Section 45X of the Advanced Manufacturing Tax Credit. The Notice of Proposed Rulemaking (the Notice) clarifies that commercial grade aluminum can qualify for the credit, which was designed to incentivize domestic production of critical materials important for the transition to clean energy. In the fourth quarter of 2023, the Company recorded a benefit of $36 in Cost of goods sold and Other receivables related to its Massena West smelter (New York) and its Warrick smelter (Indiana). 123 R. Asset Retirement Obligations The following table details the carrying value of recorded AROs by major category, of which $217 and $117 was classified as a current liability as of December 31, 2023 and 2022, respectively: December 31, Closure of bauxite residue areas Mine reclamation Spent pot lining disposal Demolition Landfill closure Balance at end of year The following table details the changes in the total carrying value of recorded AROs: December 31, Balance at beginning of year Accretion expense Liabilities incurred Payments Reversals of previously recorded liabilities Foreign currency translation and other Balance at end of year Liabilities incurred in 2023 include: 2023 2022 437 328 124 76 24 989 828 33 254 (148) (8) 30 989 $ $ $ $ 342 279 115 61 31 828 738 20 224 (114) (12) (28) 828 2022 2023 $ $ $ $ • $97 for changes in closure estimates of operating bauxite residue areas; • $87 for new mining areas opened during the year and higher estimated mine reclamation costs; • $36 related to the closure of the previously curtailed Intalco smelter; • $23 related to spent pot lining treatment and disposal; • $10 for changes in closure estimates of non-operating bauxite residue areas; and, • $1 related to an accrual for demolition for the closure of a potline at Warrick Operations. The additional accruals were primarily recorded with corresponding capitalized asset retirement costs except for $15 related to non- operating bauxite residue areas at the Alumar refinery, spent pot lining and treatment, and mine reclamation which was recorded to Cost of goods sold; and $41 related to the closure of the Intalco smelter, updated estimates for spent pot lining treatment and disposal at a previously closed site, and demolition accruals for the closure of a potline at Warrick Operations, which was recorded to Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). Liabilities incurred in 2022 include: • $81 related to improvements required on both operating and non-operating bauxite residue areas at the Poços de Caldas and Alumar refineries for changes in closure estimates and to comply with updated impoundment regulations in the regions; • $79 for new mining areas opened during the year and higher estimated mine reclamation costs; • $28 related to spent pot lining treatment and disposal; • $18 for bauxite residue areas related to water management at non-operating bauxite residue areas and changes in engineering designs for closure of operating bauxite residue areas; • $15 related to the closure of the previously curtailed magnesium smelter in Addy (Washington). The facility has been fully curtailed since 2001; and, • $3 related to accruals for demolition projects at closed sites. The additional accruals were primarily recorded with corresponding capitalized asset retirement costs (see Note B) except for $72 related to non-operating bauxite reside areas which was recorded to Cost of goods sold at the Poços de Caldas and Alumar refineries and $34 related to the closure of the magnesium smelter in Addy and adjustments to other previously closed sites which were recorded to Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2023, reversals of previously recorded liabilities included a reversal of $8 due to changes in estimates at various sites and the completion of a site demolition project. In 2022, reversals of previously recorded liabilities included a reversal of $12 due to the completion of demolition projects at numerous permanently closed sites. 124 The estimated timing of cash outflows for recorded AROs at December 31, 2023 was as follows: 2024 2025 – 2028 Thereafter Total $ $ 217 573 199 989 Changes to the estimates may result in material changes to the recorded AROs that may require an increase to or a reversal of previously recorded liabilities, as well as changes in the timing of cash outflows. S. Contingencies and Commitments Contingencies Environmental Matters Alcoa Corporation participates in environmental assessments and cleanups at several locations. These include currently or previously owned or operated facilities and adjoining properties, and waste sites, including Superfund (Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)) sites. Alcoa Corporation’s environmental remediation reserve balance reflects the most probable costs to remediate identified environmental conditions for which costs can be reasonably estimated. The following table details the changes in the carrying value of recorded environmental remediation reserves: Balance at December 31, 2020 Liabilities incurred Cash payments Reversals of previously recorded liabilities Foreign currency translation and other Balance at December 31, 2021 Liabilities incurred Cash payments Reversals of previously recorded liabilities Foreign currency translation and other Balance at December 31, 2022 Liabilities incurred Cash payments Reversals of previously recorded liabilities Foreign currency translation and other Balance at December 31, 2023 $ $ 322 21 (23) (17) 6 309 32 (26) (30) (1) 284 39 (55) (1) 1 268 At December 31, 2023 and 2022, the current portion of the remediation reserve balance was $66 and $58, respectively. In 2023, the Company incurred liabilities of $39 primarily related to $14 for the closure of the previously curtailed Intalco smelter and $13 for an increase in estimated costs associated with ongoing remediation work at the previously closed Longview (Washington) site which were recorded in Restructuring and other charges, net on the Statement of Consolidated Operations, and $12 for an increase in estimated costs associated with ongoing remediation work at various other sites which was recorded in Cost of goods sold on the accompanying Statement of Consolidated Operations. Payments related to remediation expenses applied against the reserve were $55 in 2023. These amounts include mandated expenditures as well as those not required by any regulatory authority or third party. Further, the Company reversed reserves of $1 during 2023 due to the determination that certain remaining site remediation is no longer required. In 2022, the Company incurred liabilities of $32 primarily related to $14 for the closure of the previously curtailed magnesium smelter in Addy (Washington), $6 for estimates for environmental remediation at the Point Henry site, $4 for a new phase of work at the former East St. Louis site and $9 for environmental activities at various sites. These charges are recorded in Cost of goods sold and Restructuring and other charges, net (see Note D) on the accompanying Statement of Consolidated Operations. Payments related to remediation expenses applied against the reserve were $26 in 2022. These amounts include mandated expenditures as well as those not required by any regulatory authority or third party. Further, the Company reversed reserves of $30 during 2022, primarily related to changes in estimates for site remediation at Massena East of $18 and Suralco of $5, and completion of remediation at a previously closed site in Brazil of $6. 125 In 2021, the Company incurred liabilities of $21 primarily related to remediation design considerations at the Longview site in Washington, closure of the Wenatchee aluminum smelter in Washington, environmental activities at the Point Comfort site in Texas, closure of the anode plant at the Lake Charles site in Louisiana, and wetlands mitigation at the Longview site in Washington, as well as other increases for ongoing monitoring and maintenance at various sites. These charges are primarily recorded in Cost of goods sold and Restructuring and other charges, net on the accompanying Statement of Consolidated Operations. Payments in 2021 include mandated expenditures as well as those not required by any regulatory authority or third-party. Further, the Company reversed reserves of $17 related to: • $7 due to the determination that previously estimated site remediation is not required at the previously closed Tennessee site; • $5 due to lower costs for waste treatment at a previously closed Suriname site; and, • $5 due to lower costs for site remediation related to a previously closed site in Brazil. The estimated timing of cash outflows from the environmental remediation reserve at December 31, 2023 was as follows: 2024 2025 – 2028 Thereafter Total $ $ 66 112 90 268 Reserve balances at December 31, 2023 and 2022, associated with significant sites with active remediation underway or for future remediation were $211 and $234, respectively. In management’s judgment, the Company’s reserves are sufficient to satisfy the provisions of the respective action plans. Upon changes in facts or circumstances, a change to the reserve may be required. The Company’s significant sites include: Suriname—The reserve associated with the 2017 closure of the Suralco refinery and bauxite mine is for treatment and disposal of refinery waste and soil remediation. The work began in 2017 and is expected to be completed at the end of 2025. Hurricane Creek, Arkansas—The reserve associated with the 1990 closure of two mining areas and refineries near Hurricane Creek, Arkansas is for ongoing monitoring and maintenance for water quality surrounding the mine areas and residue disposal areas. Massena, New York—The reserve associated with the 2015 closure of the Massena East smelter by the Company’s subsidiary, Reynolds Metals Company, is for subsurface soil remediation to be performed after demolition of the structures. Remediation work commenced in 2021 and will take four to eight years to complete. Point Comfort, Texas—The reserve associated with the 2019 closure of the Point Comfort alumina refinery is for disposal of industrial wastes contained at the site, subsurface remediation, and post-closure monitoring and maintenance. The final remediation plan is currently being developed, which may result in a change to the existing reserve. Sherwin, Texas—In connection with the 2018 settlement of a dispute related to the previously-owned Sherwin alumina refinery, the Company’s subsidiary, Copano Enterprises LLC, accepted responsibility for the final closure of four bauxite residue waste disposal areas (known as the Copano facility). Work commenced on the first residue disposal area in 2018 and is expected to take up to an additional four years to complete, depending on the nature of its potential re-use. Other than ongoing maintenance and repair activities, work on the next three areas has not commenced but is expected to be completed by 2048, depending on its potential re-use. Longview, Washington— In connection with a 2018 Consent Decree and Cleanup Action Plan with the State of Washington Department of Ecology, the Company’s subsidiary, Northwest Alloys as landowner, accepted certain responsibilities for future remediation of contaminated soil and sediments at the site located near Longview, Washington. In December 2020, the lessee of the land, who was a partner in the remediation of the site, filed for bankruptcy and exited the site in January 2021. The full site remediation project design, long-term and post-closure monitoring and maintenance at the site was approved in March 2023. In the third quarter of 2023, changes in scope and cost increases for remediation resulted in an increase to the reserve. The project is planned to be completed in the next two years. Addy, Washington—The reserve associated with the 2022 closure of the Addy magnesium smelter facility is for site-wide remediation and investigation and post-closure monitoring and maintenance. Remediation work is not expected to begin until 2026 and will take three to five years to complete. The final remediation plan is currently being developed, which may result in a change to the existing reserve. Ferndale, Washington—The reserve associated with the 2023 closure of the Intalco aluminum smelter in Ferndale, Washington is for below grade site remediation and five years of post-closure maintenance and monitoring. The final remediation plan is under review. 126 Other Sites—The Company is in the process of decommissioning various other plants and remediating sites in several countries for potential redevelopment or to return the land to a natural state. In aggregate, there are remediation projects at 32 other sites that are planned or underway. These activities will be completed at various times in the future with the latest expected to be in 2026, after which ongoing monitoring and other activities may be required. At December 31, 2023 and 2022, the reserve balance associated with these activities was $57 and $50, respectively. Tax Brazil (AWAB)— In March 2013, AWAB was notified by the Brazilian Federal Revenue Office (RFB) that approximately $110 (R$220) of value added tax credits previously claimed were being disallowed and a penalty of 50% was assessed. Of this amount, AWAB received $41 (R$82) in cash in May 2012. The value added tax credits were claimed by AWAB for both fixed assets and export sales related to the Juruti bauxite mine and Alumar refinery expansion for tax years 2009 through 2011. The RFB has disallowed credits they allege belong to the consortium in which AWAB owns an interest and should not have been claimed by AWAB. Credits have also been disallowed as a result of challenges to apportionment methods used, questions about the use of the credits, and an alleged lack of documented proof. AWAB presented defense of its claim to the RFB on April 8, 2013. In February 2022, the RFB notified AWAB that it had inspected the value added tax credits claimed for 2012 and disallowed $4 (R$19). In its decision, the RFB allowed credits of $14 (R$65) that were similar to those previously disallowed for 2009 through 2011. In July 2022, the RFB notified AWAB that it had inspected the value added tax credits claimed for 2013 and disallowed $13 (R$70). In its decision, the RFB allowed credits of $16 (R$84) that were similar to those previously disallowed for 2009 through 2011. The decisions on the 2012 and 2013 credits provide positive evidence to support management’s opinion that there is no basis for these credits to be disallowed. AWAB received the 2012 allowed credits with interest of $9 (R$44) in March 2022 and the 2013 allowed credits with interest of $6 (R$31) in August 2022. AWAB will continue to dispute the credits that were disallowed for 2012 and 2013. If AWAB is successful in this administrative process, the RFB would have no further recourse. If unsuccessful in this process, AWAB has the option to litigate at a judicial level. Separately from AWAB’s administrative appeal, in June 2015, a new tax law was enacted repealing the provisions in the tax code that were the basis for the RFB assessing a 50% penalty in this matter. As such, the estimated range of reasonably possible loss for these matters is $0 to $49 (R$239). It is management’s opinion that the allegations have no basis; however, at this time, the Company is unable to reasonably predict an outcome for this matter. Australia (AofA)— In December 2019, AofA received a statement of audit position (SOAP) from the Australian Taxation Office (ATO) related to the pricing of certain historic third-party alumina sales. The SOAP proposed adjustments that would result in additional income tax payable by AofA. During 2020, the SOAP was the subject of an independent review process within the ATO. At the conclusion of this process, the ATO determined to continue with the proposed adjustments and issued Notices of Assessment (the Notices) that were received by AofA on July 7, 2020. The Notices asserted claims for income tax payable by AofA of approximately $145 (A$214). The Notices also included claims for compounded interest on the tax amount totaling approximately $481 (A$707). On September 17, 2020, the ATO issued a position paper with its preliminary view on the imposition of administrative penalties related to the tax assessment issued to AofA. This paper proposed penalties of approximately $87 (A$128). AofA disagreed with the Notices and with the ATO’s proposed position on penalties. During 2020, AofA lodged formal objections to the Notices, provided a submission on the ATO’s imposition of interest and submitted a response to the ATO’s position paper on penalties. After the ATO completes its review of AofA’s response to the penalties position paper, the ATO could issue a penalty assessment. To date, AofA has not received a response to its submission on the ATO’s imposition of interest or its response to the ATO’s position paper on penalties. Through February 1, 2022, AofA did not receive a response from the ATO on AofA’s formal objections to the Notices and, on that date, AofA submitted statutory notices to the ATO requiring the ATO to make decisions on AofA’s objections within a 60-day period. On April 1, 2022, the ATO issued its decision disallowing the Company’s objections related to the income tax assessment, while the position on penalties and interest remains outstanding. On April 29, 2022, AofA filed proceedings in the Australian Administrative Appeals Tribunal (AAT) against the ATO to contest the Notices, a process which could last several years. The AAT held the first directions hearing on July 25, 2022 ordering AofA to file its evidence and related materials by November 4, 2022, ATO to file its materials by April 14, 2023 and AofA to file reply materials by May 26, 2023. AofA filed its evidence and related materials on November 4, 2022. The ATO did not file its materials by April 14, 2023. At a directions hearing on May 17, 2023, the ATO was granted an extension to file its materials by August 18, 2023. At a directions hearing on September 26, 2023, the ATO was granted an additional extension to file its materials by November 3, 2023. The ATO filed its materials on November 13, 2023. At a directions hearing on November 22, 2023, AofA was ordered to file any reply materials by March 15, 2024. The substantive hearing is scheduled for June 2024. 127 The Company maintains that the sales subject to the ATO’s review, which were ultimately sold to Aluminium Bahrain B.S.C., were the result of arm’s length transactions by AofA over two decades and were made at arm’s length prices consistent with the prices paid by other third-party alumina customers. In accordance with the ATO’s dispute resolution practices, AofA paid 50% of the assessed income tax amount exclusive of interest and any penalties, or approximately $74 (A$107), during the third quarter 2020, and the ATO is not expected to seek further payment prior to final resolution of the matter. If AofA is ultimately successful, any amounts paid to the ATO as part of the 50% payment would be refunded. AofA funded the payment with cash on hand and recorded the payment within Other noncurrent assets as a noncurrent prepaid tax asset; the related December 31, 2023 balance is $73 (A$107). Further interest on the unpaid tax will continue to accrue during the dispute. The initial interest assessment and the additional interest accrued are deductible against taxable income by AofA but would be taxable as income in the year the dispute is resolved if AofA is ultimately successful. AofA applied this deduction beginning in the third quarter of 2020, reducing cash tax payments. At December 31, 2023 and December 31, 2022, total reductions in cash tax payments were $199 (A$293) and $174 (A$260), respectively, and are reflected within Other noncurrent liabilities and deferred credits as a noncurrent accrued tax liability. The Company continues to believe it is more likely than not that AofA’s tax position will be sustained and therefore is not recognizing any tax expense in relation to this matter. However, because the ultimate resolution of this matter is uncertain at this time, the Company cannot predict the potential loss or range of loss associated with the outcome, which may materially affect its results of operations and financial condition. References to any assessed U.S. dollar amounts presented in connection with this matter have been converted into U.S. dollars from Australian dollars based on the exchange rate in the respective period. AofA is part of the Company’s joint venture with Alumina Limited, an Australian public company listed on the Australian Securities Exchange. The Company and Alumina Limited own 60% and 40%, respectively, of the joint venture entities, including AofA. Other Spain— In July 2019, the Company completed the divestiture of the Avilés and La Coruña (Spain) aluminum facilities to PARTER Capital Group AG (PARTER) in a sale process endorsed by the Spanish government and supported by the workers’ representatives following a collective dismissal process. In connection with the divestiture, Alcoa committed to make financial contributions to the divested entities of up to $95; a total of $78 was paid through December 31, 2021. In early 2020, PARTER sold a majority stake in the facilities to an unrelated party. Alcoa had no knowledge of the subsequent transaction prior to its announcement and on August 28, 2020, Alcoa filed a lawsuit with the Court of First Instance in Madrid, Spain asserting that the sale was in breach of the sale agreement between Alcoa and PARTER. In June 2023, the Court of First Instance in Madrid issued a declaratory judgment in Alcoa’s favor ruling that the transaction between PARTER and the unrelated party was a breach of the sale agreement. There was no financial compensation to the Company as a result of this ruling. Related to this subsequent sale transaction, certain proceedings and investigations were initiated by or at the request of the employees of the facilities against their current employers, the new owners of the current employers, and Alcoa, alleging that certain agreements from the 2019 collective dismissal process remain in force and that, under such agreements, Alcoa remains liable for certain related employment benefits. During 2022, Alcoa reached a Global Settlement Agreement (GSA) with the workers of the divested Avilés and La Coruña facilities to settle various legal disputes related to the 2019 divestiture, and Alcoa recorded a charge of $79 in Restructuring and other charges, net to reflect its estimated liability for the GSA. In July 2023, the Supreme Court of Spain ratified the GSA. Upon completion of the remaining administrative and judicial approvals, the Company made cash payments of $76 to the former employees of the facilities in 2023 in accordance with the GSA. The remaining payments will be made in the early 2024. General In addition to the matters discussed above, various other lawsuits, claims, and proceedings have been or may be instituted or asserted against Alcoa Corporation, including those pertaining to environmental, safety and health, commercial, tax, product liability, intellectual property infringement, employment, and employee and retiree benefit matters, and other actions and claims arising out of the normal course of business. While the amounts claimed in these other matters may be substantial, the ultimate liability is not readily determinable because of the considerable uncertainties that exist. Accordingly, it is possible that the Company’s liquidity or results of operations in a particular period could be materially affected by one or more of these other matters. However, based on facts currently available, management believes that the disposition of these other matters that are pending or asserted will not have a material adverse effect, individually or in the aggregate, on the financial position of the Company. 128 Commitments Purchase Obligations. Alcoa Corporation is party to unconditional purchase obligations for energy that expire between 2040 and 2041. Commitments related to these contracts total $56 in 2024, $59 in 2025, $61 in 2026, $63 in 2027, $65 in 2028, and $770 thereafter. Expenditures under these contracts totaled $53 in 2023, $58 in 2022, and $86 in 2021. Additionally, the Company has entered into other purchase commitments for energy, raw materials, and other goods and services, which total $3,896 in 2024, $1,998 in 2025, $1,566 in 2026, $1,448 in 2027, $1,407 in 2028, and $8,757 thereafter. AofA has a gas supply agreement to power its three alumina refineries in Western Australia which began in July 2020 for a 12-year period. The terms of this agreement required AofA to make a prepayment of $500 prior to 2017. At December 31, 2023, prepayments of $37 and $283 were included in Prepaid expenses and other current assets and Other noncurrent assets (see Note U), respectively, on the accompanying Consolidated Balance Sheet. At December 31, 2022, prepayments of $37 and $311 were included in Prepaid expenses and other current assets and Other noncurrent assets (see Note U), respectively, on the accompanying Consolidated Balance Sheet. Guarantees of Third Parties. As of December 31, 2023 and 2022, the Company had no outstanding potential future payments for guarantees issued on behalf of a third party. Bank Guarantees and Letters of Credit. Alcoa Corporation and its subsidiaries have outstanding bank guarantees and letters of credit related to, among others, energy contracts, environmental obligations, legal and tax matters, leasing obligations, workers compensation, and customs duties. The total amount committed under these instruments, which automatically renew or expire at various dates between 2024 and 2025, was $294 (includes $86 issued under a standby letter of credit agreement —see below) at December 31, 2023. Additionally, ParentCo has outstanding bank guarantees and letters of credit related to the Company of $13 at December 31, 2023. In the event ParentCo would be required to perform under any of these instruments, ParentCo would be indemnified by Alcoa Corporation in accordance with the Separation and Distribution Agreement. Likewise, the Company has outstanding bank guarantees and letters of credit related to ParentCo of $8 at December 31, 2023. In the event Alcoa Corporation would be required to perform under any of these instruments, the Company would be indemnified by ParentCo in accordance with the Separation and Distribution Agreement. In December 2023, AofA committed to provide a bank guarantee for approximately $68 (A$100) which demonstrates Alcoa’s confidence that its operations will not impair drinking water supplies. In August 2017, Alcoa Corporation entered into a standby letter of credit agreement, which expires on June 27, 2024 (amended in August 2018, May 2019, May 2021, June 2022, and January 2024), with three financial institutions. The agreement provides for a $200 facility used by the Company for matters in the ordinary course of business. Alcoa Corporation’s obligations under this facility are secured in the same manner as obligations under the Company’s revolving credit facility. Additionally, this facility contains similar representations and warranties and affirmative, negative, and financial covenants as the Company’s Revolving Credit Facility (see Note M). As of December 31, 2023, letters of credit aggregating $86 were issued under this facility. Surety Bonds. Alcoa Corporation has outstanding surety bonds primarily related to tax matters, contract performance, workers compensation, environmental-related matters, and customs duties. The total amount committed under these bonds, which automatically renew or expire at various dates between 2024 and 2028, was $190 at December 31, 2023. Additionally, ParentCo has outstanding surety bonds related to the Company of $8 at December 31, 2023. In the event ParentCo would be required to perform under any of these instruments, ParentCo would be indemnified by Alcoa Corporation in accordance with the Separation and Distribution Agreement. Likewise, the Company has outstanding surety bonds related to ParentCo of $5 at December 31, 2023. In the event Alcoa Corporation would be required to perform under any of these instruments, the Company would be indemnified by ParentCo in accordance with the Separation and Distribution Agreement. 129 T. Leasing The Company records a right-of-use asset and lease liability for several types of operating leases, including land and buildings, alumina refinery process control technology, plant equipment, vehicles, and computer equipment. These amounts are equivalent to the aggregate future lease payments on a discounted basis. The leases have remaining terms of less than one to 59 years. The discount rate applied in determining the present value of lease payments is the Company’s incremental borrowing rate at the lease commencement date, unless there is a rate implicit in the lease agreement. The Company does not have material financing leases. Lease expense and operating cash flows include: Costs from operating leases Variable lease payments Short-term rental expense 2023 2022 $ $ $ 53 25 11 $ $ $ The weighted average lease term and weighted average discount rate were as follows: December 31, Weighted average lease term for operating leases (years) Weighted average discount rate for operating leases 2023 2022 12.9 6.7% 54 16 2 5.1 5.6% The following represents the aggregate right-of-use assets and related lease obligations recognized in the Consolidated Balance Sheet: December 31, Properties, plants, and equipment, net Other current liabilities Other noncurrent liabilities and deferred credits Total operating lease liabilities 2023 2022 $ $ 135 31 104 135 $ $ New leases of $76 and $26 were added during the years ended December 31, 2023 and 2022, respectively. The future cash flows related to the operating lease obligations as of December 31, 2023 were as follows: Year Ending December 31, 2024 2025 2026 2027 2028 Thereafter Total lease payments (undiscounted) Less: discount to net present value Total U. Other Financial Information Interest Cost Components Amount charged to expense Amount capitalized $ $ $ $ 2023 2022 $ $ 107 4 111 $ $ 106 3 109 130 89 30 59 89 40 26 20 16 11 112 225 (90) 135 2021 195 6 201 Other Expenses (Income), Net Equity loss (income) Foreign currency (gains) losses, net Net loss (gain) from asset sales Net loss (gain) on mark-to-market derivative instruments (P) Non-service costs – pension and other postretirement benefits (O) Other, net 2023 2022 2021 228 (64) 14 5 13 (62) 134 $ $ 27 9 10 (174) 60 (50) (118) $ $ (105) 3 (354) (25) 47 (11) (445) $ $ In 2023, Other, net of $62 was primarily related to interest income on interest bearing accounts. In 2022, Other, net of $50 was primarily related to interest income for the Brazil value added tax credits (see Note S). In 2021, Net loss (gain) from asset sales of $354 was primarily related to the sales of the Rockdale site, the Eastalco site, and the Warrick Rolling Mill (see Note C). Other Noncurrent Assets December 31, Value added tax credits Prepaid gas transmission contract Gas supply prepayment (S) Deferred mining costs, net Goodwill (L) Prepaid pension benefit (O) Noncurrent prepaid tax asset (S) Noncurrent restricted cash (see below) Intangibles, net (L) Other 2023 2022 336 297 283 187 146 125 73 71 37 95 1,650 $ $ 294 285 311 161 145 146 72 56 29 94 1,593 $ $ Prepaid gas transmission contract—As part of a previous sale transaction of an equity investment, Alcoa maintained access to approximately 30% of the Dampier to Bunbury Natural Gas Pipeline transmission capacity in Western Australia for gas supply to three alumina refineries. At December 31, 2023 and 2022, AofA had an asset of $297 and $285, respectively, representing prepayments made under the agreement for future gas transmission services. Value added tax credits—The Value added tax (VAT) credits (federal and state) relate to two of the Company’s subsidiaries in Brazil, AWAB and Alumínio, concerning the Alumar smelter and refinery and the Juruti mine. The mine, refinery and smelter pay VAT on the purchase of goods and services used in the mining, alumina, and production process. The credits generally can be utilized to offset the VAT charged on domestic sales of bauxite, alumina, and aluminum. In March 2021, the Brazil Federal Supreme Court provided clarification on an earlier ruling that found the inclusion of state VAT within the federal VAT tax base to be unconstitutional. After receiving further clarification from the court in August 2021, the Company finalized the amount of its recovery claim and submitted the claim to the tax authorities in the fourth quarter and received acknowledgment of the claim in January 2022. As a result, in the fourth quarter of 2021, the Company recorded $95 of additional VAT credits in Other noncurrent assets, $47 payable to Arconic Corporation within Other noncurrent liabilities, $34 in Sales, and $14 of interest income within Other (income) expenses, net. The amount due to Arconic Corporation represents VAT payments related to an Arconic subsidiary previously owned by Alumínio for a portion of the claim years and covered under agreements related to the Separation Transaction (see Note A). In the fourth quarter of 2018, after an assessment of the future realizability of Brazil state VAT credits recorded, the Company established an allowance on the accumulated state VAT credit balances and stopped recording any future credit benefits. With the restart of the Alumar smelter and its first metal sales in June 2022, the Company had the ability to monetize these credits. In June 2022, the Company reversed the allowance with a credit of $83 to Restructuring and other charges, net and reversed the subsequent additions to the valuation allowance with a credit to Cost of goods sold of $46 (same accounts as when incurred). 131 Other Noncurrent Liabilities and Deferred Credits December 31, Noncurrent accrued tax liability (S) Operating lease obligations (T) Accrued compensation and retirement costs Value added tax credits payable to Arconic Corporation Deferred energy credits Noncurrent restructuring reserve (D) Deferred alumina sales revenue Other 2023 2022 $ $ 199 104 94 58 42 15 20 36 568 $ $ 174 59 95 51 37 3 28 39 486 Deferred energy credits—Deferred energy credits relate to cash received for 2022 and 2021 carbon dioxide emissions related to the San Ciprián smelter and refinery during the years ended December 31, 2023 and 2022, respectively, from a governmental agency in Spain. The terms of the credits require the Company to comply with certain conditions for a period of three years. These deferred credits will be recognized as a reduction to Cost of goods sold once it is determined to be probable the Company will satisfy all conditions. Should the Company not meet all conditions during the three-year period, the credits will be repaid to the governmental agency. Value added tax credits payable to Arconic Corporation—See, Other noncurrent assets—Value added tax credits, above. Cash and Cash Equivalents and Restricted Cash December 31, Cash and cash equivalents Current restricted cash Noncurrent restricted cash 2023 2022 944 32 71 1,047 $ $ 1,363 55 56 1,474 $ $ Restricted cash primarily relates to commitments made for the December 2021 and February 2023 viability agreements for the San Ciprián restart (see Note D). At December 31, 2023, the Company had restricted cash of $91 remaining to be made available for $118 in capital improvements at the site and $35 in smelter restart costs. The Company incurred $28 of capital investment expenditures against the commitments during 2023. Cash Flow Information Cash paid for interest and income taxes was as follows: Interest, net of amount capitalized Income taxes, net of amount refunded V. Supplier Finance Programs 2023 2022 2021 $ $ 100 319 $ 100 504 191 152 The Company has various supplier finance programs with third-party financial institutions that are made available to suppliers to facilitate payment term negotiations. Under the terms of these agreements, participating suppliers receive payment in advance of the payment date from third-party financial institutions for qualifying invoices. Alcoa’s obligations to its suppliers, including amounts due and payment terms, are not impacted by its suppliers’ participation in these programs. The Company does not pledge any assets as security or provide any guarantees beyond payment of outstanding invoices at maturity under these arrangements. The Company does not pay fees to the financial institutions under these arrangements. At December 31, 2023 and December 31, 2022, qualifying supplier invoices outstanding under these programs were $104 and $185, respectively, and have payment terms ranging from 50 to 110 days. These obligations are included in Accounts payable, trade on the accompanying Consolidated Balance Sheet. 132 W. Subsequent Events On January 8, 2024, Alcoa announced the full curtailment of the Kwinana refinery beginning in the second quarter of 2024. The refinery has an annual nameplate capacity of 2.2 million metric tons and has been operating at approximately 80 percent of its nameplate capacity since January 2023, when the Company reduced production in response to a domestic natural gas shortage in Western Australia due to production challenges experienced by key gas suppliers. The Company’s decision to fully curtail the refinery was made based on a variety of factors, including the refinery’s age, scale, operating costs and current bauxite grades, in addition to current market conditions. The refinery currently has approximately 800 employees and this number will be reduced to approximately 250 in the third quarter of 2024, when alumina production will cease. Certain processes will continue until about the third quarter of 2025, when the employee number will be further reduced to approximately 50. In the first quarter of 2024, Alcoa will record restructuring charges between $180 and $200 related to the curtailment of the refinery. The charges include approximately $81 for water management costs, $55 for employee related costs, $26 for asset retirement obligations, and $18 of other costs. Alcoa’s share of related cash outlays of approximately $115 (which includes existing employee related liabilities and asset retirement obligations) is expected to be spent in 2024 ($80) and 2025 ($35). 133 Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure. None. Item 9A. Controls and Procedures. (a) Evaluation of Disclosure Controls and Procedures Alcoa Corporation’s Chief Executive Officer and Chief Financial Officer have evaluated the Company’s disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the U.S. Securities Exchange Act of 1934, as amended, as of the end of the period covered by this report, and they have concluded that these controls and procedures were effective as of December 31, 2023. (b) Management’s Annual Report on Internal Control over Financial Reporting Management’s Report on Internal Control over Financial Reporting is included in Part II Item 8 of this Form 10-K. (c) Attestation Report of the Registered Public Accounting Firm The effectiveness of Alcoa Corporation’s internal control over financial reporting as of December 31, 2023 has been audited by PricewaterhouseCoopers LLP (PCAOB ID No. 238), an independent registered public accounting firm, as stated in their report, which is included in Part II Item 8 of this Form 10-K. (d) Changes in Internal Control over Financial Reporting There have been no changes in internal control over financial reporting during the fourth quarter of 2023 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting. Item 9B. Other Information. None of the Company’s directors or “officers,” as defined in Rule 16a-1(f) of the Exchange Act, adopted, modified, or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408 of Regulation S- K, during the Company’s fiscal quarter ended December 31, 2023. Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections. Not applicable. Item 10. Directors, Executive Officers and Corporate Governance. PART III The information required by Item 401 of Regulation S-K regarding executive officers is set forth in Part I Item 1 of this Form 10-K under the caption “Information about our Executive Officers.” The information required by Item 401 of Regulation S-K regarding directors is contained under the caption “Item 1 Election of 10 Director Nominees to Serve for One-Year Terms Expiring in 2025” of Alcoa Corporation’s Definitive Proxy Statement for the 2024 Annual Meeting of Stockholders (Proxy Statement), which will be filed with the SEC within 120 days of the end of Alcoa Corporation’s fiscal year ended December 31, 2023 (Proxy Statement) and is incorporated herein by reference. The Company’s Code of Conduct and Ethics (Code of Conduct), which incorporates a code of ethics that applies to our principal executive officer, principal financial officer, principal accounting officer or controller, is publicly available on the Company’s website at www.alcoa.com under the section “Investors—Governance—Governance Documents—Code of Conduct.” Alcoa Corporation will post any amendments to, or waivers of, its Code of Conduct that apply to its principal executive officer, principal financial officer, principal accounting officer or controller on its website at www.alcoa.com. The information required by Items 407(c)(3), (d)(4) and (d)(5) of Regulation S-K is included under the captions “Item 1 Election of 10 Director Nominees to Serve for One-Year Terms Expiring in 2025—Nominating Board Candidates—Procedures and Director Qualifications,” “Corporate Governance—Board Information—Meetings, Attendance and Committee Composition” and “Corporate Governance—Board Information—Committees of the Board” of the Proxy Statement and is incorporated herein by reference. 134 Item 11. Executive Compensation. The information required by Item 402 and Item 407(e)(4) and (e)(5) of Regulation S-K is contained under the captions “Item 1 Election of 10 Director Nominees to Serve for One-Year Terms Expiring in 2025—Non-Employee Director Compensation Program,” “Executive Compensation,” “Corporate Governance—Board Information—The Board’s Role in Risk Oversight,” “Corporate Governance—Board Information—Committees of the Board,” and “Corporate Governance—Compensation Matters” of the Proxy Statement. Such information (other than the Compensation Committee Report, which shall not be deemed to be filed) is incorporated herein by reference. Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. The information required by Item 201(d) of Regulation S-K is contained under the caption “Equity Compensation Plan Information” of the Proxy Statement and is incorporated herein by reference. The information required by Item 403 of Regulation S-K is contained under the caption “Beneficial Ownership” of the Proxy Statement and is incorporated herein by reference. Item 13. Certain Relationships and Related Transactions, and Director Independence. The information required by Item 404 of Regulation S-K is contained under the caption “Corporate Governance —Related Person Transactions” of the Proxy Statement and is incorporated herein by reference. The information required by Item 407(a) of Regulation S-K is contained under the caption “Corporate Governance—Board Information” of the Proxy Statement and is incorporated herein by reference. Item 14. Principal Accountant Fees and Services. The information required by Item 9(e) of Schedule 14A is contained under the caption “Item 2 Ratification of the Appointment of PricewaterhouseCoopers LLP as the Company’s Independent Auditor for 2024—Audit Committee Pre-Approval Policy” and “Item 2 Ratification of the Appointment of PricewaterhouseCoopers LLP as the Company’s Independent Auditor for 2024—Auditor Fees” of the Proxy Statement and is incorporated herein by reference. 135 Item 15. Exhibit and Financial Statement Schedules. PART IV (a) The consolidated financial statements and exhibits listed below are filed as part of this report. (1) The Company’s consolidated financial statements, the notes thereto and the report of the Independent Registered Public Accounting Firm are included in Part II Item 8 of this report. (2) Financial statement schedules have been omitted because they are not applicable, not required, or the required information is included in the consolidated financial statements or notes thereto. (3) Exhibits. Exhibit No. Description of Exhibit 3.1 Amended and Restated Certificate of Incorporation of Alcoa Corporation (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed November 3, 2016 (File No. 1-37816)) 3.2 Amended and Restated Bylaws of Alcoa Corporation, as adopted on July 26, 2023 (incorporated by reference to Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q filed July 27, 2023 (File No. 1-37816)) 4.1 Indenture, dated May 17, 2018, among Alcoa Nederland Holding B.V., Alcoa Corporation, certain subsidiaries of Alcoa Corporation, and the Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed May 17, 2018 (File No. 1-37816)) 4.2 Supplemental Indenture, dated as of December 9, 2019, among Alcoa Corporation, Alcoa Treasury S.à r.l, Alcoa Nederland Holding B.V., and The Bank of New York Mellon Trust Company, N.A. under the Indenture dated May 17, 2018 (incorporated by reference to Exhibit 4.5 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, filed February 21, 2020 (File No. 1- 137816)) 4.3 Indenture, dated July 13, 2020, among Alcoa Nederland Holding B.V., Alcoa Corporation, certain subsidiaries of Alcoa Corporation, and The Bank of New York Mellon Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed July 13, 2020 (File No. 1-37816)) 4.4 Indenture, dated as of March 24, 2021, among Alcoa Nederland Holding B.V., Alcoa Corporation, certain subsidiaries of Alcoa Corporation, and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed March 24, 2021 (File No. 1-37816)) 4.5 Description of Securities (incorporated by reference to Exhibit 4.6 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, filed February 21, 2020 (File No. 1-137816)) 10.1 Separation and Distribution Agreement, dated as of October 31, 2016, by and between Arconic Inc. and Alcoa Corporation (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed November 4, 2016 (File No. 1-37816)) 10.2 Tax Matters Agreement, dated as of October 31, 2016, by and between Arconic Inc. and Alcoa Corporation (incorporated by reference to Exhibit 2.3 to the Company’s Current Report on Form 8-K filed November 4, 2016 (File No. 1-37816)) 10.3 Amendment No. 1, dated as of January 17, 2024, which includes, as Exhibit A thereto, the Revolving Credit Agreement, dated as of September 16, 2016, as amended as of October 26, 2016, as amended and restated as of November 14, 2017, as amended and restated as of November 21, 2018, as amended as of August 16, 2019, as amended as of April 21, 2020, as amended as of June 24, 2020, as amended as of March 4, 2021, as amended and restated as of June 27, 2022 and as amended as of January 17, 2024, among Alcoa Corporation, Alcoa Nederland Holding B.V., the lenders and issuers from time to time party thereto, and JPMorgan Chase Bank N.A., as administrative agent for the lenders and issuers (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed January 18, 2024 (File No. 1-37816)) 136 Exhibit No. Description of Exhibit 10.4 Amended and Restated Charter of the Strategic Council for the AWAC Joint Venture (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed November 4, 2016 (File No. 1-37816)) 10.5 Side Letter of November 1, 2016, between Alcoa Corporation and Alumina Limited clarifying transfer restrictions (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed November 4, 2016 (File No. 1-37816)) 10.6 Third Amended and Restated Limited Liability Company Agreement of Alcoa World Alumina LLC, dated as of November 1, 2016, by and among Alcoa USA Corp., ASC Alumina, Alumina International Holdings Pty Ltd, Alumina (USA) Inc., Reynolds Metals Company, LLC and Reynolds Metals Exploration, Inc. (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed November 4, 2016 (File No. 1-37816)) 10.7 Shareholders’ Agreement between Alcoa of Australia Limited, Alcoa Australian Holdings Pty Ltd and Alumina Limited, originally dated as of May 10, 1996 (incorporated by reference to Exhibit 10.13 to Amendment No. 2 to the Company’s Registration Statement on Form 10 filed September 1, 2016 (File No. 1-37816)) 10.8 Kwinana State Agreement of 1961 (incorporated by reference to Exhibit 10.7 to Amendment No. 2 to the Company’s Registration Statement on Form 10 filed September 1, 2016 (File No. 1-37816)) 10.9 Pinjarra State Agreement of 1969 (incorporated by reference to Exhibit 10.8 to Amendment No. 2 to the Company’s Registration Statement on Form 10 filed September 1, 2016 (File No. 1-37816)) 10.10 Wagerup State Agreement of 1978 (incorporated by reference to Exhibit 10.9 to Amendment No. 2 to the Company’s Registration Statement on Form 10 filed September 1, 2016 (File No. 1-37816)) 10.11 Alumina Refinery Agreement of 1987 (incorporated by reference to Exhibit 10.10 to Amendment No. 2 to the Company’s Registration Statement on Form 10 filed September 1, 2016 (File No. 1-37816)) 10.12 Framework Agreement, dated June 26, 2019, between Saudi Arabian Mining Company (Ma’aden) and Alcoa Corporation (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed July 31, 2019 (File No. 1-37816)) 10.13 Amendment and Restatement Deed dated June 26, 2019 relating to the Aluminium Project Framework Shareholders’ Agreement originally dated December 20, 2009 between Saudi Arabian Mining Company (Ma’aden) and Alcoa Corporation (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed July 31, 2019 (File No. 1-37816)) 10.14 Alcoa Corporation 2016 Stock Incentive Plan (as Amended and Restated as of May 9, 2018), (incorporated by reference to Exhibit 99.1 to the Company’s Current Report on Form 8-K filed May 15, 2018 (File No. 1-37816))* 10.15 Alcoa USA Corp. Deferred Compensation Plan, effective August 1, 2016, as amended November 15, 2021 (incorporated by reference to Exhibit 10.24 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, filed February 24, 2022 (File No. 1-137816))* 10.16 Alcoa USA Corp. Nonqualified Supplemental Retirement Plan C (incorporated by reference to Exhibit 10.3 to Amendment No. 1 to the Company’s Registration Statement on Form 10 filed August 12, 2016 (File No. 1-37816))* 10.17 Amendment 1 to Alcoa USA Corp. Nonqualified Supplemental Retirement Plan C, effective January 1, 2021 (incorporated by reference to Exhibit 10.9 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, filed February 23, 2018 (File No. 1-37816))* 10.18 Form of Amended and Restated Indemnification Agreement by and between Alcoa Corporation and individual directors or officers, effective August 1, 2017 (incorporated by reference to Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q filed August 3, 2017 (File No. 1-37816))* 10.19 Alcoa Corporation Annual Cash Incentive Compensation Plan (as Amended and Restated), effective February 21, 2018 (incorporated by referenced to Exhibit 10 to the Company’s Quarterly Report on Form 10-Q filed May 9, 2018 (File No. 1-37816))* 137 Exhibit No. Description of Exhibit 10.20 Alcoa Corporation Amended and Restated Change in Control Severance Plan, dated July 30, 2019 (incorporated by reference to Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q filed October 31, 2019 (File No. 1-37816))* 10.21 Amendment No. 1, dated as of January 8, 2023 to the Alcoa Corporation Amended and Restated Change in Control Severance Plan, dated July 30, 2019 (incorporated by reference to Exhibit 10.27 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, filed February 23, 2023 (File No. 1-137816))* 10.22 Amended and Restated Form of Alcoa Corporation Chief Executive Officer and Chief Financial Officer Executive Severance Agreement, effective as of July 30, 2019 (incorporated by reference to Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q filed October 31, 2019 (File No. 1-37816))* 10.23 Amendment No. 1 to Amended and Restated Executive Severance Agreement, between William F. Oplinger and Alcoa Corporation, effective February 1, 2023 (incorporated by reference to Exhibit 10.29 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, filed February 23, 2023 (File No. 1-137816))* 10.24 Amendment to the Amended and Restated Executive Severance Agreement, between Roy C. Harvey and Alcoa Corporation, effective September 24, 2023 (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed October 26, 2023 (File No. 1-37816))* 10.25 Amended and Restated Form of Alcoa Corporation Corporate Officer Executive Severance Agreement, effective as of July 30, 2019 (incorporated by reference to Exhibit 10.7 to the Company’s Quarterly Report on Form 10-Q filed October 31, 2019 (File No. 1-37816))* 10.26 Amended and Restated Form of Alcoa Corporation Corporate Officer Executive Severance Agreement (Canada), effective as of April 1, 2020 (filed herewith)* 10.27 Terms and Conditions for Employee Stock Option Awards (incorporated by reference to Exhibit 10.30 to the Company’s Registration Statement on Form S-1 filed January 18, 2017 (File No. 333-215606))* 10.28 Terms and Conditions for Employee Stock Option Awards, dated January 24, 2018 (incorporated by reference to Exhibit 10.30 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, filed February 23, 2018 (File No. 1-37816))* 10.29 Terms and Conditions for Employee Restricted Share Units, effective October 1, 2019 (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed October 31, 2019 (File No. 1-37816))* 10.30 Terms and Conditions for Employee Stock Option Awards, effective October 1, 2019 (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q filed October 31, 2019 (File No. 1-37816))* 10.31 Terms and Conditions for Employee Special Retention Awards, effective October 1, 2019 (incorporated by reference to Exhibit 10.4 to the Company’s Quarterly Report on Form 10-Q filed October 31, 2019 (File No. 1-37816))* 10.32 Terms and Conditions for Employee Restricted Share Units, effective December 8, 2021 (incorporated by reference to Exhibit 10.37 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, filed February 24, 2022 (File No. 1-137816))* 10.33 Terms and Conditions for Employee Special Retention Awards, effective December 8, 2021 (incorporated by reference to Exhibit 10.38 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, filed February 24, 2022 (File No. 1-137816))* 10.34 Terms and Conditions for Employee Restricted Share Units, effective January 24, 2024 (filed herewith)* 10.35 Terms and Conditions for Employee Special Retention Awards, effective January 24, 2024 (filed herewith)* 10.36 Alcoa Corporation Non-Employee Director Compensation Policy, effective October 1, 2023 (filed herewith)* 10.37 Terms and Conditions for Deferred Fee Restricted Share Units Director Awards, effective December 1, 2016 (incorporated by reference to Exhibit 10.34 to the Company’s Registration Statement on Form S-1 filed January 18, 2017 (File No. 333-215606))* 138 Exhibit No. Description of Exhibit 10.38 Terms and Conditions for Deferred Fee Restricted Share Units Director Awards, effective May 4, 2022 (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q filed July 25, 2022 (File No. 1-37816))* 10.39 Terms and Conditions for Restricted Share Units Annual Director Awards, effective December 1, 2016 (incorporated by reference to Exhibit 10.35 to the Company’s Registration Statement on Form S-1 filed January 18, 2017 (File No. 333-215606))* 10.40 Terms and Conditions for Restricted Share Units Annual Director Awards, effective May 9, 2017 (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report Form 10-Q filed August 3, 2017 (File No. 1-37816))* 10.41 Terms and Conditions for Restricted Share Units Annual Director Awards, effective May 4, 2022 (incorporated by reference to Exhibit 10.4 to the Company’s Quarterly Report on Form 10-Q filed July 25, 2022 (File No. 1-37816))* 10.42 Alcoa Corporation 2016 Deferred Fee Plan for Directors, effective November 1, 2016, as amended and restated on December 5, 2018 (incorporated by reference to Exhibit 10.37 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018, filed February 26, 2019 (1-37816))* 21.1 List of Subsidiaries (filed herewith) 23.1 Consent of PricewaterhouseCoopers LLP (filed herewith) 23.2 Consent of SLR International Corporation (filed herewith) 31.1 Certification of Principal Executive Officer required by Securities and Exchange Commission Rule 13a- 14(a) or 15d-14(a) (filed herewith) 31.2 Certification of Principal Financial Officer required by Securities and Exchange Commission Rule 13a- 14(a) or 15d-14(a) (filed herewith) 32.1 Certification of Principal Executive Officer, required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (furnished herewith) 32.2 Certification of Principal Financial Officer, required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (furnished herewith) 96.1 Technical Report Summary for Darling Range, Western Australia (filed herewith) 96.2 Technical Report Summary for Juruti, Brazil (incorporated by reference to Exhibit 96.2 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, filed February 24, 2022 (File No. 1-137816)) 97 Alcoa Corporation Clawback Policy, effective October 15, 2023 (filed herewith) 99.1 Amended and Restated Grantor Trust Agreement by and between Alcoa Corporation and Wells Fargo Bank, National Association, effective October 24, 2017 (incorporated by reference to Exhibit 99.1 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, filed February 23, 2018 (File No. 137816)) 101.INS Inline XBRL Instance Document 101.SCH Inline XBRL Taxonomy Extension Schema with Embedded Linkbases Document 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) Certain schedules exhibits, and appendices have been omitted in accordance with to Item 601(a)(5) of Regulation S-K. The Company hereby undertakes to furnish copies of any omitted schedule, exhibit, or appendix to the Commission upon request. * Denotes management contracts or compensatory plans or arrangements required to be filed as Exhibits to this Form 10-K. Item 16. Form 10-K Summary. Not applicable. 139 Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. SIGNATURES ALCOA CORPORATION By: /s/ Renee R. Henry Renee R. Henry Senior Vice President and Controller February 21, 2024 Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated and as of February 21, 2024. /s/ William F. Oplinger William F. Oplinger President, Chief Executive Officer and Director (Principal Executive Officer and Director) /s/ Molly S. Beerman Molly S. Beerman Executive Vice President and Chief Financial Officer (Principal Financial Officer) /s/ Renee R. Henry Renee R. Henry Senior Vice President and Controller (Principal Accounting Officer) /s/ Steven W. Williams Steven W. Williams Director, Chairman of the Board of Directors /s/ Pasquale Fiore Pasquale Fiore Director /s/ James A. Hughes James A. Hughes Director /s/ Carol L. Roberts Carol L. Roberts Director /s/ Ernesto Zedillo Ernesto Zedillo Director /s/ Mary Anne Citrino Mary Anne Citrino Director /s/ Thomas J. Gorman Thomas J. Gorman Director /s/ Roberto O. Marques Roberto O. Marques Director /s/ Jackson P. Roberts Jackson P. Roberts Director 140 SUBSIDIARIES OF THE REGISTRANT Name Alcoa Alumínio S.A. Alcoa Australian Holdings Pty Ltd Alcoa Holland B.V. Alcoa Nederland Holding B.V. Alcoa of Australia Limited1 Alcoa USA Corp. Alcoa USA Holding Company Alcoa-Lauralco Management Company Aluminerie Lauralco B.V. Reynolds Metals Company, LLC Exhibit 21.1 State or Country of Organization Brazil Australia Netherlands Netherlands Australia Delaware Delaware Canada Netherlands Delaware The names of particular subsidiaries have been omitted because, considered in the aggregate as a single subsidiary, they would not constitute, as of the end of the year covered by this report, a “significant subsidiary” as defined in Regulation S-X under the Securities Exchange Act of 1934, as amended. 1 Part of the AWAC joint venture. CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-214420, 333-214423, 333- 218038, and 333-228258) of Alcoa Corporation of our report dated February 21, 2024 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K. Exhibit 23.1 /s/ PricewaterhouseCoopers LLP Pittsburgh, Pennsylvania February 21, 2024 SLR Consulting Limited 21 February 2024 Exhibit 23.2 CONSENT OF QUALIFIED PERSON Re: Form 10-K of Alcoa Corporation (the “Company”) SLR Consulting Limited (“SLR”), in connection with the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (the “Form 10-K”), consents to: • • • • the public filing by the Company and use of the technical report summary titled “Technical Report Summary on the Darling Range, Western Australia,” with an effective date of December 31, 2023 and dated February 21, 2024, and the technical report summary titled “Technical Report Summary for Juruti, Brazil,” with an effective date of December 31, 2021 and dated February 24, 2022 (together, the “Technical Report Summaries”), that were prepared in accordance with Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission, as exhibits to and referenced in the Form 10-K; the incorporation by reference of the Technical Report Summaries into the Company’s Registration Statements on Form S-8 (Nos. 333-214420, 333-214423, 333-218038, and 333-228258) (collectively, the “Registration Statements”); the use of and references to our name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the Form 10-K, the Registration Statements, and the Technical Report Summaries; and any extracts from or a summary of the Technical Report Summaries in the Form 10-K and incorporated by reference in the Registration Statements and the use of any information derived, summarized, quoted, or referenced from the Technical Report Summaries, or portions thereof, that was prepared by us, that we supervised the preparation of, and/or that was reviewed and approved by us, that is included or incorporated by reference in the Form 10-K and the Registration Statements. SLR is responsible for authoring, and this consent pertains to, the Technical Report Summaries. SLR certifies that it has read the Form 10-K and that it fairly and accurately represents the information in the Technical Report Summaries for which it is responsible. SLR Consulting Limited Per: John R. Walker, FGS, MIMMM, FIQ Technical Director, Mining Advisory Europe Registered Office: 1 Bartholomew Lane, London EC2N 2AX Registered No:SLR Consulting Limited 3880506 SLR Consulting Limited The Cursitor, 38 Chancery Lane, London, WC2A 1EN Tel: +44 3300 886631 www.slrconsulting.com I, William F. Oplinger, certify that: 1. I have reviewed this annual report on Form 10-K of Alcoa Corporation; CERTIFICATIONS Exhibit 31.1 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: (a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; (b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; (c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and (d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and 5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): (a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. Date: February 21, 2024 /s/ William F. Oplinger Name: William F. Oplinger Title: President and Chief Executive Officer I, Molly S. Beerman, certify that: 1. I have reviewed this annual report on Form 10-K of Alcoa Corporation; CERTIFICATIONS Exhibit 31.2 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: (a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; (b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; (c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and (d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and 5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): (a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. Date: February 21, 2024 /s/ Molly S. Beerman Name: Molly S. Beerman Title: Executive Vice President and Chief Financial Officer CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Exhibit 32.1 In connection with the Annual Report of Alcoa Corporation (the “Company”) on Form 10-K for the period ended December 31, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, in the capacity and on the date indicated below, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge: 1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: February 21, 2024 /s/ William F. Oplinger William F. Oplinger President and Chief Executive Officer A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of this report. CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 Exhibit 32.2 In connection with the Annual Report of Alcoa Corporation (the “Company”) on Form 10-K for the period ended December 31, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, in the capacity and on the date indicated below, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to her knowledge: 1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: February 21, 2024 /s/ Molly S. Beerman Molly S. Beerman Executive Vice President and Chief Financial Officer A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of this report. ALCOA CORPORATION DIRECTORS AND OFFICERS AS OF MARCH 1, 2024 Directors Steven W. Williams (Non-Executive Chairman of the Board) Retired President and Chief Executive Officer, Suncor Energy, Inc. Mary Anne Citrino Senior Advisor, The Blackstone Group Pasquale (Pat) Fiore Former Rio Tinto executive Thomas J. Gorman Retired Chief Executive Officer, Brambles Ltd James A. Hughes Managing Partner, EnCap Investments L.P. Roberto O. Marques Senior Advisor, The Carlyle Group William F. Oplinger President and Chief Executive Officer, Alcoa Corporation Jackson (Jackie) P. Roberts Senior ESG Advisor, Hunter Point Capital and Capitol Meridian Partners Carol L. Roberts Retired Senior Vice President and Chief Financial Officer, International Paper Company Ernesto Zedillo Senior Fellow, Jackson School of Global Affairs, Frederick Iseman ’74 Director of the Program for the Study of Globalization and Professor at Yale University Officers Renato Bacchi Executive Vice President and Chief Commercial Officer Nicol A. Gagstetter Executive Vice President and Chief External Affairs Officer Heather Hudak Senior Vice President, Tax William F. Oplinger President and Chief Executive Officer Molly S. Beerman Executive Vice President and Chief Financial Officer Marissa P. Earnest Senior Vice President, Chief Governance Counsel and Secretary Andrew Hastings Executive Vice President and General Counsel Renee R. Henry Senior Vice President and Controller Tammi A. Jones Executive Vice President and Chief Human Resources Officer Louis Langlois Senior Vice President and Treasurer Matthew T. Reed Executive Vice President and Chief Operations Officer Stockholder Information Annual Meeting The annual meeting of stockholders will be held virtually via live webcast on Friday, May 10, 2024 at 9:30 a.m. EDT at www.virtualshareholdermeeting.com/AA2024 Company News Visit www.alcoa.com for Securities and Exchange Commission filings, quarterly earnings reports and other company news. Copies of the annual report and Forms 10-K and 10-Q may be requested at no cost at https://investors.alcoa.com or by writing to: Corporate Communications, Alcoa Corporation 201 Isabella Street, Suite 500 Pittsburgh, PA 15212-5858. Investor Information Securities analysts and investors may write to: Investor Relations, Alcoa Corporation 201 Isabella Street, Suite 500 Pittsburgh, PA 15212-5858; call 1.412.992.5450; or e-mail Investor.Relations@alcoa.com. Other Publications For Alcoa’s Sustainability Report, visit www.alcoa.com/sustainability; write to: Sustainability, Alcoa Corporation 201 Isabella Street, Suite 500 Pittsburgh, PA 15212-5858; or e-mail sustainability@alcoa.com. For more information about the Alcoa Foundation and Alcoa community investments, visit www.alcoa.com/foundation. Stockholder Services Stockholders of record with questions on account balances, address changes, or other account matters may contact Alcoa’s stock transfer agent and registrar, Computershare. BY TELEPHONE 1.800.522.6645 (in the United States and Canada) 1.201.680.6578 (all other calls) 1.800.231.5469 (Telecommunications Device for the Deaf: TDD) BY INTERNET www.computershare.com CORRESPONDENCE Computershare Investor Services P.O. Box 43006 Providence, RI 02940-3006 OVERNIGHT CORRESPONDENCE Computershare Investor Services 150 Royall Street Suite 101 Canton, MA 02021 For stockholder questions on other matters related to Alcoa, write to: Alcoa Corporation Attn: Corporate Secretary’s Office 201 Isabella Street, Suite 500 Pittsburgh, PA 15212-5858; call 1.412.315.2900; or email Corporate_Secretary@alcoa.com. Stock Listing COMMON STOCK New York Stock Exchange | Ticker symbol: AA ALCOA CORPORATION 201 Isabella Street Suite 500 Pittsburgh, PA 15212-5858 Tel 1.412.315.2900 www.alcoa.com CONNECT WITH US