CARBO Ceramics Inc.
Annual Report 2017

Plain-text annual report

2 0 1 7 A N N U A L R E P O R T L E V E R A G I N G O U R STRENGTHS TRANSFORMING O U R B U S I N E S S T E C H N O L O G I E S F O R O I L A N D G A S • I N D U S T R I A L • E N V I R O N M E N T A L L E V E R A G I N G O U R STRENGTHS TRANSFORMING O U R B U S I N E S S In 2017, CARBO® continued its transformation from a predominantly Oil and Gas services company to a company serving the Oil and Gas, Environmental and Industrial sectors. Our transformation leveraged the strengths of CARBO that brought about decades of successful performance. Strengths such as insightful thinking, innovative problem solving, advanced technology, service execution, and efficiency in manufacturing. As the oil and gas industry continued to struggle through one of the worst oil and natural gas markets, CARBO developed focused technologies and effective products to further enhance performance and deliver value. In the industrial sector, CARBO made a deep commitment to bring clients the performance and value advantages of ceramic media. CARBO developed innovative new products to help our clients achieve higher quality with greater efficiency. Our ceramic media also provides a silica-free work environment, resulting in improved safety. CARBO transformed its environmental business by identifying products that could be produced with existing technologies to serve a much broader range of applications and industries. In 2017, CARBO proved that leveraging its strengths could transform its own business, and its clients’ businesses. Year-over-year revenue growth of 83 percent provided evidence that the transformation strategy is working. To Our Shareholders, Clients and Employees: In fiscal 2017, CARBO delivered strong and balanced across a broad range of industries. Our environmental performance, with notable improvements in all of our services business model is transforming to take current businesses. These were the result of strategic decisions and technologies, facilities and products sold to oilfield clients bold initiatives developed to reduce the Company’s long- and market them to other targeted industries through time reliance on the historically cyclical petroleum industry innovative new sales channels. In each of these transformations, the CARBO team has found ways to leverage our Company’s distinctive strengths—intellectual capital, technological expertise, by channeling our defining strengths, unique skillsets and differentiating attributes to create a more diversified, capable and stable company. In 2017, CARBO’s efforts came together as we executed our strategy of leveraging our strengths and transforming our business. TRANSFORMATION AT WORK For nearly four decades, the CARBO name has been synonymous with ceramic proppant. In 2014, our base ceramic proppant provided approximately 80 percent of the Company’s total revenue, while in 2017 it represented approximately 30 percent of total revenue. While the oil and natural gas sector will always remain a core business, CARBO is transforming from a one-dimensional company manufacturing capabilities, distribution and client into a truly multi-faceted, strategically diversified company. relations—and apply them to previously untapped Technology-enhanced oilfield ceramic products now contribute nearly as much revenue on a percentage basis as base ceramic proppant. We are transforming our industrial products business by developing products to specifically address the needs of many more clients opportunities. We have taken the lessons learned in building the world’s leading ceramic proppant manufacturer and transferred them to areas with ready potential. The entire team has shown creativity and energy in developing avenues of diversification. 1 PROVIDING UNMATCHED TECHNOLOGY FOR THE OILFIELD In the oil and natural gas sector, CARBO has long been the recognized leader in applying powerful, innovative technology and expertise that enhance the productivity and extend the life of oil and gas wells. In 2017, we continued to develop, introduce and commercialize technology-driven products. Through increased product sales to an expanding global client list, oilfield technology revenue increased significantly compared to the prior year. In addition, our strategic decision to provide high-quality sand alongside our proprietary ceramic proppant continued to generate revenue growth. By using maximum capacity in our own facilities and through third-party arrangements, sand sales increased more than sevenfold, from 311 million pounds in 2016 to 2.19 billion pounds in 2017. FINANCIAL HIGHLIGHTS Total Company revenue for 2017 increased 83 percent from 2016, driven by solid revenue growth in each of our businesses. As we entered 2017, one of our biggest challenges was reducing the cash burn from the previous year. We achieved continuous improvement throughout 2017, reaching a cash- neutral position in the fourth quarter. Management continued to reduce costs across the organization. We trimmed our distribution footprint while retaining the flexibility to handle client needs. Through initiatives such as closing and subleasing facilities and idled rail cars, we reduced distribution expense by $9 million on an annualized basis in 2017. We made the strategic decision to divest our Russian proppant business for $22 million. This move strengthened our liquidity position and reduced risk in our company portfolio. Additionally, we refinanced our bank debt with privately secured debt in the amount of $65.0 million. As of December 31, 2017, cash and cash equivalents, including restricted cash, totaled $78.4 million. Maintaining cash at strong levels will allow us the freedom to continue to execute on our transformation strategy in 2018 and provide flexibility to increase resources to grow our business. 2 INDUSTRIAL SECTOR ADVANTAGES CARBO has long had a presence in the industrial sector. Ceramic proppant originally developed for the oilfield also has applications as casting and grinding media. Client relationships in those business sectors tend to be long-lasting, and the industries are not particularly cyclical in nature, serving to mitigate the impact of the historic cycles of the petroleum industry. In 2017, we made a transforming commitment to the industrial sector by introducing products engineered for specific industrial applications. We also added significant resources to our technical sales team. As a result of this strengthened focus, our industrial revenues increased 75 percent over 2016 levels. New clients accounted for roughly one-quarter of our industrial sales in 2017. INDUSTRIAL STRENGTH With exceptional thermal stability and pellet consistency, ACCUCAST enables precise casting of intricate and complex parts. NEW MARKETS FOR ENVIRONMENTAL BUSINESS Our strategies of transformation were notable in our ACCUCAST AND CARBOGRIND RAISE THE BAR CARBO has developed industrial media products that environmental protection business. Prior to 2016, Falcon set new standards for durability, accuracy, safety and Technologies served the oil and gas sector by providing containment structures and systems, often installed on site, to protect against leaks and spills. In 2016, we focused on increased utilization of our automated manufacturing facilities and on the creation of a line of products that could be purchased directly by clients or distributors, thereby reducing labor costs and improving profit margins. value. ACCUCAST® ceramic casting media enables foundries to improve casting quality and consistency, reduce media consumption and costs, and eliminate the threat of harmful silica dust to keep workers safe. In a mining company’s head-to-head comparison, CARBOGRIND® ceramic grinding media outperformed two established industry suppliers by more than 30%. Breakthrough products such as these helped CARBO generate record industrial revenues in 2017. ASSETGUARD™ manufactures a durable, impermeable liner that protects the environment from leaks and spills. Shown above is our LOCATIONGUARD® service that protects wellsites during drilling and completion operations. The strength, uniform size and spherical shape of CARBOGRIND result in longer media life, more efficient grinding and reduced wear on milling equipment. 3 At the end of 2016, we made the strategic decision to pursue containment and spill protection sales opportunities in industries other than oil and gas. AN ENCOURAGING OUTLOOK With the progress of our transformation strategies coupled with the signs of recovery in the oil and gas sector in 2017, In 2017, more than 50 percent of environmental segment we expect continued improvement in our operating results revenue came from product sales rather than services. through the coming year. • We expect our diversification initiatives to continue to increase Company revenue, producing profitable growth and cash from operating activities. • We project that the cost-reduction measures implemented in 2017 will continue to be a positive force on our earnings. • We believe revenues for our oil and gas businesses will grow in 2018, in line with increased industry activity. • We anticipate increased market penetration of our higher-margin, technology-rich products in the oil and gas sector to continue to drive double-digit growth. • We project that our industrial business will grow by double digits again in 2018 and continue to grow Our environmental protection business has shifted its focus from on-site services to sales of a wide range of products such as TANKGUARD®, a lightweight yet long-lasting tank base. MAXIMIZING FACILITIES UTILIZATION During 2017, CARBO continued our program to employ idled significantly for the foreseeable future in terms of product volume, revenue, industries served and geographical or under-utilized assets to generate cash flow. We leveraged distribution. the CARBO Technology Center and our state-of-the-art manufacturing facilities to provide minerals processing capacity to a number of companies in the oil and gas, manufacturing, construction and agriculture industries. • We project that our environmental business will continue to grow in 2018, following oil and gas sector activity as well as our targeted revenue streams in the Industrial sector. In conclusion, I especially want to thank our CARBO team members, our Board of Directors and our stakeholders. Diversifying our business requires a transformation of vision, focus, aspirations and expectations. Our culture at CARBO is one that looks at challenges to be met and opportunities to be seized rather than being distracted by uncertainty. You helped make all of this possible. Sincerely, Gary Kolstad President and Chief Executive Officer 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (cid:3)(cid:3) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2017 or (cid:3)(cid:3) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ____________ to _____________ Commission File No. 001-15903 CARBO Ceramics Inc. (Exact name of registrant as specified in its charter) DELAWARE (State or other jurisdiction of incorporation or organization) 72-1100013 (I.R.S. Employer Identification Number) 575 North Dairy Ashford, Suite 300 Houston, Texas 77079 (Address of principal executive offices) (281) 921-6400 (Registrant’s telephone number) Securities registered pursuant to Section 12(b) of the Act: Title of each class Common Stock, par value $0.01 per share Name of each exchange on which registered New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes (cid:4) No (cid:3) 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 (cid:4) No (cid:3) 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 (cid:3) No (cid:4) Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files). Yes (cid:3) No (cid:4) Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. 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 NNon-accelerated filer Emerging growth company (cid:4) (cid:3) (Do not check if a smaller reporting company) (cid:3) Accelerated filer Smaller reporting company (cid:3) (cid:3) 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. (cid:31) Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes (cid:4) No (cid:3) The aggregate market value of the Common Stock held by non-affiliates of the Registrant, based upon the closing sale price of the Common Stock on June 30, 2017, as reported on the New York Stock Exchange, was approximately $112,118,204. Shares of Common Stock held by each director and executive officer and each person who owns 10% or more of the outstanding Common Stock have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes. tt As of February 28, 2018, the Registrant had 27,414,445 shares of Common Stock outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the Proxy Statement for Registrant’s Annual Meeting of Stockholders to be held May 22, 2018, are incorporated by reference in Part III. TABLE OF CONTENTS PART I Business........................................................................................................................................................................... Item 1. Item 1A. Risk Factors ..................................................................................................................................................................... Item 1B. Unresolved Staff Comments............................................................................................................................................ Properties......................................................................................................................................................................... Item 2. Legal Proceedings ........................................................................................................................................................... Item 3. Item 4. Mine Safety Disclosure ................................................................................................................................................... PART II Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities ..... Item 6. Selected Financial Data ................................................................................................................................................... Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations ......................................... Item 7A. Quantitative and Qualitative Disclosures about Market Risk ......................................................................................... Item 8. Financial Statements and Supplementary Data ............................................................................................................... Changes in and Disagreements with Accountants on Accounting and Financial Disclosure ......................................... Item 9. Item 9A. Controls and Procedures.................................................................................................................................................. Item 9B. Other Information............................................................................................................................................................ PART III Item 10. Directors, Executive Officers and Corporate Governance .............................................................................................. Item 11. Executive Compensation ................................................................................................................................................. Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ....................... Item 13. Certain Relationships and Related Transactions, and Director Independence................................................................ Item 14. Principal Accounting Fees and Services ......................................................................................................................... PART IV 1 9 15 15 16 16 17 19 20 29 29 29 29 30 31 31 31 31 31 Item 15. Exhibits and Financial Statement Schedules................................................................................................................... Item 16. Form 10-K Summary....................................................................................................................................................... Management’s Report on Internal Control Over Financial Reporting.............................................................................................. Reports of Independent Registered Public Accounting Firm ........................................................................................................... Consolidated Financial Statements ................................................................................................................................................... Exhibit Index..................................................................................................................................................................................... Signatures.......................................................................................................................................................................................... 32 32 F-1 F-2 F-4 33 36 Item 1. Business General PART I CARBO Ceramics Inc. (“we,” “us,” “our” or our “Company”) is a technology company that provides products and services to the global oil and gas and industrial markets to enhance value for its clients. The Company was incorporated in 1987 in Delaware. As used herein, “Company”, “CARBO”, “we”, “our” and “us” may refer to the Company and/or its consolidated subsidiaries. aa The Company conducts its business within two operating segments: 1) Oilfield Technologies and Services and 2) Environmental Products and Services. These two operating segments provide products and services to several market segments in the oil and gas, and the industrial markets. Financial information about reportable operating segments is provided in Note 13 to the Company’s Consolidated Financial Statements. Our Oilfield Technologies and Services segment includes the manufacturing and selling of proppant products for use primarily in the hydraulic fracturing of oil and natural gas wells, FracPro® software for the design of fracture treatments, and StrataGen® consulting services for the optimizing of well completions. Hydraulic fracturing is the most widely used method of increasing production from oil and natural gas wells. The hydraulic fracturing process consists of pumping fluids down a natural gas or oil well at pressures sufficient to create fractures in the hydrocarbon-bearing rock formation. A granular material, called proppant, is suspended and transported in the fluid and fills the fracture, “propping” it open once high-pressure pumping stops. The proppant-filled fracture creates a conductive channel through which the hydrocarbons can flow more freely from the formation to the well and then to the surface. There are three primary types of proppant that can be utilized in the hydraulic fracturing process: sand, resin-coated sand and ceramic. Sand is the least expensive proppant, resin-coated sand is more expensive and ceramic proppant is typically the most expensive. The higher initial cost of ceramic proppant is justified by the fact that its use in certain well conditions results in an increase in the production rate of oil and natural gas, an increase in the total oil or natural gas that can be recovered from the well and, consequently, an increase in cash flow for the operators of the well. The increased production rates are primarily attributable to the higher strength and more uniform size and shape of ceramic proppant versus alternative materials. We are one of the world’s largest suppliers of ceramic proppant. We manufacture various distinct ceramic proppants. Our technology suite of ceramic proppants include the following: KRYPTOSPHERE® HD is a high-performance ceramic proppant engineered to deliver increased conductivity and durability in the highest closure stress wells. Even in challenging, high-cost environments such as deep water wells, KRYPTOSPHERE HD retains its integrity and enables greater Estimated Ultimate Recovery (“EUR”) from the reservoir. KRYPTOSPHERE LD meets client needs for a lower density proppant than KRYPTOSPHERE HD, yet has similar characteristics and conductivity in high stress wells. SCALEGUARD® is a porous ceramic proppant that is infused with scale-inhibiting chemicals and placed throughout the fracture as part of the hydraulic fracturing process. The infused scale inhibitor in SCALEGUARD is designed to be released into the fracture only on contact with water and thereby reduce or eliminate expensive remedial maintenance programs. We also are developing SALTGUARD® and PARAGUARD™ to help prevent salt and paraffin wax buildup in wells. Our FUSION® technology improves well productivity by forming a stable, high-permeability proppant pack that prevents proppant washout from the non-compressive annulus and near-wellbore areas. CARBOAIR® is a high-transport, ultra-low-density ceramic proppant technology that has been developed primarily to increase production and EUR from slickwater fracturing operations. The technology enables exploration and production (“E&P”) operators to avoid the introduction of gel into their fracs while improving reservoir contact and fracture conductivity. In addition, we manufacture CARBONRT®TT , a detectable proppant that utilizes a non-radioactive tracer material to assist operators in determining the locations of fractures in a natural gas or oil well. This tracer is added to the proppant granules during the manufacturing process, and can be added to most of the types of proppant that the Company sells. 1 Our base ceramic suite of products include: CARBOHSP® and CARBOPROP® are high and intermediate density ceramic proppants, respectively, designed primarily for use in deep oil and natural gas wells. CARBOLITE®, CARBOECONOPROP® and CARBOHYDROPROP® are low-density ceramic proppants. CARBOLITE® is used in medium depth oil and natural gas wells, where higher production rates can be achieved due to the product’s uniform size and spherical shape. CARBOECONOPROP was introduced to provide a lower cost ceramic to compete more directly with resin-coated sand and sand proppant, and CARBOHYDROPROP was introduced to improve performance in “slickwater” fracture treatments. P P We produce resin-coated ceramic (CARBOBOND LITE®), which addresses a niche market in which oil and natural gas wells are subject to the risk of proppant flow-back. Our sand proppants include CARBO NORTHERN-WHITE, which is a frac sand that is used by operators that still value quality, but do not wish to pay the higher costs associated with ceramic or resin-coated proppants. Our manufacturing facilities also produce ceramic media for use in various industrial technology applications, including but not limited to the casting and milling markets. New ceramic media products have been developed specifically for industrial applications expanding our market opportunities outside the oil and natural gas industry. We also have begun plant trials at our manufacturing facilities to produce products other than ceramic proppant and media for contract manufacturing clients. Those mineral processing plant trials have proven successful and have led to increased revenue generation. One example, we recently signed a multi-year contract manufacturing agreement to be the exclusive toll processor for a product in the agricultural industry. Through our wholly-owned subsidiary StrataGen, Inc., our Oilfield Technologies and Services segment also promotes increased production and EUR of oil and natural gas by selling one of the most widely used fracture stimulation software under the brand FracPro, and providing fracture design and consulting services to oil and natural gas E&P companies under the brand StrataGen. FracPro provides a suite of stimulation software solutions used for designing fracture treatments and for on-site real-time analysis. Use of FracPro has enabled our clients to recognize and remedy potential stimulation problems. FracPro has also been integrated with third party reservoir simulation software, furthering its reach and utility. StrataGen, our specialized consulting team, works with operators around the world to help optimize well placement, fracture treatment design and production enhancement. The broad range of expertise of the StrataGen consultants includes: fracture treatment design; completion support; on-site treatment supervision, quality control; post-treatment evaluation and optimization; reservoir and fracture studies; rock mechanics; and software application and training. Our Environmental Products and Services segment is intended to protect operators’ assets, minimize environmental risks, and lower lease operating expense (“LOE”). Asset Guard Products Inc. (“AGPI”), the only wholly-owned subsidiary of ours to operate in this segment, provides spill prevention, containment and countermeasure systems for the oil and gas and industrial industry. AGPI uses proprietary technology to make products designed to enable its clients to extend the life of their storage assets, reduce the potential for hydrocarbon spills and provide containment of stored materials. Current demand for proppant is extremely dynamic. Most of our oilfield products and services depend primarily on the supply of and demand for oil and natural gas, as well as on the number of natural gas and oil wells drilled, completed or re-completed worldwide. More specifically, the demand for most of our products and services is dependent on the number of oil and natural gas wells that are hydraulically fractured to stimulate production. The demand for our products and services is also dependent on the commodity price of oil and natural gas, and lower commodity prices result in fewer purchases of our premium products. In addition, our results of operations are also significantly affected by a host of other factors, including but not limited to (a) rig counts, (b) well completions activity, which is not necessarily correlated with rig count, (c) customer preferences, (d) new product and technology adoption, (e) imports and competition, (f) changes in the product mix of what we sell, (g) costs of developing our products and services and running our business, and (h) changes in our strategy and execution. During the year ended December 31, 2017, we generated approximately 79% of our revenues in the United States and 21% in international markets. Competition As the demand for ceramic proppant (including proppant produced by us) continued to be negatively impacted by the severe decline in the oil and natural gas industry in 2017, the number of domestic and international competitors in the marketplace continued 2 to decrease, and many of our competitors have shut down plants and/or reduced production. However, we do not have full visibility as to the extent or duration of these shut-downs and reductions. One of our worldwide proppant competitors is Saint-Gobain Proppants (“Saint-Gobain”). Saint-Gobain is a division of Compagnie de Saint-Gobain, a large French glass and materials company. Saint-Gobain manufactures a variety of ceramic proppants that it markets in competition with some of our products. Saint-Gobain’s primary manufacturing facilities are located in Fort Smith and Bauxite, Arkansas. Saint-Gobain also manufactures ceramic proppant in China. Mineracao Curimbaba (“Curimbaba”), based in Brazil, also manufactures and markets ceramic proppant in competition with some of our products. Imerys, S.A., a competitor based in France (“Imerys”), has ceramic proppant manufacturing facilities in Andersonville and Wrens, Georgia and also competes with some of our products. We are aware of two major manufacturers of ceramic proppant in Russia. One of which is FORES Refractory Plant (“FORES”) located in Ekaterinburg, Russia. Although we have limited information about FORES, we believe that FORES manufactures intermediate-density and low-density ceramic proppant lines and markets its products both inside and outside of Russia. We are also aware of a large number of manufacturers in China. Most of these companies produce intermediate-density and low-density ceramic proppants that are marketed both inside and outside of China. Chinese proppant imports into the United States increased beginning in 2010 and 2011, which contributed to an over-supply of ceramic proppant beginning in 2012. However, beginning in early 2015, imports declined significantly. Our KRYPTOSPHERE product line is replacing both CARBOHSP and CARBOPROP. Historically, competition for PROP principally includes ceramic proppant manufactured by Saint-Gobain, Curimbaba, as well as various CARBOHSP and CARBO P manufacturers located in China. Our CARBOLITE, CARBOECONOPROP and CARBO HYDROPROP products compete primarily with ceramic proppant produced by Saint-Gobain, Curimbaba and Imerys and with sand-based proppant for use in the hydraulic fracturing of natural gas and oil wells. At this time, there is not in our view a comparable competitor’s product to our KRYPTOSPHERE product line, which is the subject of patent protection. P P P The leading suppliers of mined sand are Unimin Corp., U.S. Silica Company, Fairmount Minerals Limited, Inc., Hi-Crush Partners LP, and Badger Mining Corp. The leading suppliers of resin-coated sand are Hexion and Santrol, a subsidiary of Fairmount Minerals. We believe that some of the significant factors that influence a customer’s decision to purchase our ceramic proppant are (i) reservoir and geological characteristics, (ii) price/performance ratio, (iii) on-time delivery performance, (iv) technical support, (v) proppant availability and (vi) the financial status of E&P operators. We believe that our products are competitively priced and that our delivery performance is far better than the competition. Lastly, our superior technical support has enabled us to persuade customers to use our technology products in an increasingly broad range of applications which in turn has increased the overall market for our technology products. Product Development We continually conduct testing and development activities with respect to alternative raw materials to be used in our existing and alternative production methods. During 2015, we completed the first line of a plant retrofit to enable production of KRYPTOSPHERE products including both KRYPTOSPHERE LD and KRYPTOSPHERE HD. We introduced KRYPTOSPHERE HD in 2013, a proppant with greatly increased strength and conductivity when compared to our traditional proppants. This proppant is intended for use in ultra-high stress wells. In 2015, we introduced KRYPTOSPHERE LD, a lower density proppant than KRYPTOSPHERE HD. For information regarding our research and development expenditures, see Note 1 to the “Notes to Consolidated Financial Statements.” SCALEGUARD, our proppant-delivered, scale-inhibiting technology continues to show positive performance results in multiple basins across North America. SCALEGUARD has now been successfully used in hundreds of hydraulic fracturing stages. We are pursuing the development of other infused proppant technologies, some of which underwent field trials in 2016 and 2017. Going beyond our existing proppant detection capabilities, we are developing technology for far-field detection of proppant in a fracture, which has shown positive results. We are aware of others engaged in the development of alternative products for use as proppants in the hydraulic fracturing process, but are uncertain of the financial status and product viability of these potential competitors. We believe that while there are potential specialty applications for such products, they will not significantly impact the use of ceramic proppants. Further, we believe that the “know-how” and trade secrets necessary to efficiently manufacture a product of consistently high quality are difficult barriers to entry to overcome. t 3 Customers and Marketing Our clients include both oil and gas customers, and industrial customers. Our largest customers are participants in the hydraulic fracturing industry. Specifically, Halliburton Energy Services, Inc. and Keane Group each accounted for more than 10% of our 2017 revenues. However, the end users of our products are principally the operators of natural gas and oil wells that hire the pressure pumping service companies to hydraulically fracture wells. We work both with the pressure pumping service companies and with the operators of natural gas and oil wells to present the technical and economic advantages of using ceramic proppant. We generally supply our customers with products on a just-in-time basis, as specified in individual purchase orders. Continuing sales of product depend on our direct customers and the operators being satisfied with product quality, availability and delivery performance. In addition, our ability to increase sales of all of our products depends significantly on a favorable level of activity in the upstream natural gas and oil industries. We sell our software products and consulting services directly to operators of oil and natural gas wells as well as to service companies involved in hydraulic fracturing. t We recognize the importance of a technical marketing program in demonstrating long-term economic advantages when selling products and services that offer financial benefits over time. We have a broad technical sales force to advise end users on the benefits of using ceramic proppant, fracture simulation software, and related consulting services. Although originally our ceramic products were intended for use in deeper, higher-stress wells that require high-strength proppant, we believe that there is economic benefit to operators of using ceramic proppant in shallower, lower-stress wells. We also believe that our new product introductions and education-based technical marketing efforts have enabled us to maintain our position not only as one of the world’s largest suppliers of ceramic proppant but also as a leading innovator in our industry. We provide a variety of technical support services and have developed computer software that models the return on investment achievable by using our ceramic proppant versus alternatives in the hydraulic fracturing of a natural gas or oil well. In addition to the technical marketing effort, from time to time, we engage in field trials to demonstrate the economic benefits of our products and validate the findings of our computer simulations. Periodically, we provide proppant to operators for field trials on a discounted basis in exchange for their agreement to provide production data for direct comparison of the results of fracturing with ceramic proppant as compared to alternative proppants. a Our international marketing efforts are conducted primarily through our sales offices in the United Arab Emirates, Canada, Russia, and South America. Our products and services are used worldwide by U.S. customers operating domestically and abroad, and by foreign customers. Sales outside the United States accounted for 21%, 34% and 29% of our sales for 2017, 2016 and 2015, respectively. The distribution of our international and domestic revenues is shown below, based upon the region in which the customer used the products and services: 2017 For the years ended December 31, 2016 ($ in millions) 2015 Location United States........................................................................ International......................................................................... Total ............................................................................... $ $ 149.0 $ 39.7 188.8 $ 67.6 $ 35.4 103.0 $ 199.2 80.4 279.6 Production Capacity We have constructed adequate capacity to support present and foreseeable demand for our ceramic proppant. We continue to incorporate new methods and technologies to reduce our manufacturing costs and make our products more cost-competitive. As production levels increase, our manufacturing costs per unit tend to decrease. 4 Stated capacity of our facilities varies based on the mix of products we expect to produce. The following table sets forth the current stated capacity of each of our existing ceramic manufacturing and other facilities: Location Annual Capacity (millions of pounds) Eufaula, Alabama ................................................................... McIntyre, Georgia................................................................... Toomsboro, Georgia ............................................................... Millen, Georgia....................................................................... Total ceramic manufacturing capacity .............................. Marshfield, Wisconsin – sand processing .............................. New Iberia, Louisiana – resin-coating.................................... Total current capacity........................................................ 245 * 275 * 1,000 * 250 * 1,770 1,500 330 ** 3,600 * ** Given market conditions, our Millen manufacturing facility is currently mothballed and output levels at our Eufaula, McIntyre and Toomsboro facilities are at reduced levels. Processing activities at the New Iberia facility primarily involve resin-coating of previously manufactured ceramic proppant substrate. The retrofit of the first production line at our Eufaula, Alabama plant to produce KRYPTOSPHERE was completed in late 2015. With this retrofit, we can now produce up to approximately 100 million pounds of KRYPTOSPHERE annually. While this retrofit enables production of our new KRYPTOSPHERE technology products, it did not add additional production capacity. The retrofit of af second production line at this plant has been deferred until market conditions warrant moving forward with the project. During 2017, our overall total ceramic plant utilization, excluding our Russia plant, which we sold in September 2017, was approximately 18% of stated capacity. Our sand processing plant in Marshfield operated at approximately 82% of its stated capacity during 2017. We do not expect any significant improvements to our ceramic proppant plant utilization in 2018, except possibly to due to mineral processing growth. We expect utilization at our sand processing plant to improve during 2018. Depending on industryrr conditions, we can modify output levels or idle operations at plants as needed. Refer to our discussion of impairment considerations in the “Critical Accounting Policies” section of Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations. Construction of additional manufacturing capacity beyond our existing facilities is not expected in the foreseeable future, and would be dependent on the expected future demand for our products, access to needed capital and the ability to obtain necessary environmental permits. Long-Lived Assets by Geographic Area Long-lived assets, consisting of net property, plant and equipment, goodwill, intangibles, and other long-term assets as of December 31 in the United States and other countries are as follows: Long-lived assets: United States........................................................................ International (primarily Canada for 2017; China, Russia, and Canada for 2016 and 2015)........................................... Total ............................................................................... $ $ 332.6 $ 496.0 $ 538.8 6.5 339.1 $ 10.2 506.2 $ 12.3 551.1 2017 2016 ($ in millions) 2015 Distribution We maintain finished goods inventories at each of our manufacturing facilities and at remote stocking facilities. Our North American remote stocking facilities consist of bulk storage silos with truck trailer loading facilities, as well as rail yards for direct transloading from rail cars to tank trucks. International remote stocking sites are duty-free warehouses operated by independent owners. North American sites are typically supplied by rail, and international sites are typically supplied by container ship. In total, we lease approximately 2,225 rail cars for use in the distribution of our products, of which we have subleased approximately 745 rail cars. The price of our products sold for delivery in the lower 48 United States and Canada typically includes just-in-time delivery of proppant to the operator’s well site, which eliminates the need for customers to maintain an inventory of ceramic proppant. 5 Raw Materials Ceramic proppant and ceramic media are made from alumina-bearing ores (commonly referred to as clay, bauxite, bauxitic clay or kaolin, depending on the alumina content) that are readily available on the world market. The main known deposits of alumina- bearing ores in the United States are in Arkansas, Alabama and Georgia; other economically mineable known deposits are located in Australia, Brazil, China, Gabon, Guyana, India, Jamaica, Russia and Surinam. Bauxite is largely used in the production of aluminum metal, refractory material and abrasives. We believe that our ability to purchase bauxite on the open market coupled with our current bauxite inventories will sufficiently provide for our bauxite needs in the United States during 2018. P Our Eufaula, McIntyre, Toomsboro and Millen facilities primarily use locally mined kaolin for the production of CARBOLITE, CARBOECONOPROP and CARBO HYDROPROP. We have entered into bi-lateral contracts that require a supplier to sell to us, and require us to purchase from the supplier, at least fifty percent of the Eufaula facility’s and Millen facility’s annual kaolin requirements. The Eufaula contract runs through May 2020, with an option for us to extend this agreement for additional three year terms. The Millen contract, which commenced in July 2014, has an initial term of five years with options to extend the agreement for additional five year terms. Our Millen facility is currently idled. We have obtained ownership rights in acreage in Wilkinson County, Georgia, which contains in excess of a twelve year supply of kaolin for our Georgia facilities based on full capacity production rates. We have entered into a long-term agreement with a third party to mine and transport this material at a fixed price subject to annual adjustment. The agreement requires us to utilize the third party to mine and transport a majority of the McIntyre and Toomsboro facility’s annual kaolin requirement. Overall, we estimate that our fee simple and leasehold mineral rights in the states of Alabama and Georgia contain approximately 20.1 million tons of kaolin suitable for use in production of our kaolin-based proppants. d We utilize our own Northern White sand, CARBO NORTHERN-WHITE, and purchase third party wet processed sand reserves for our sand processing facility in Marshfield, Wisconsin, which supplies raw frac sand to the proppant market. Ceramic Production Process Ceramic proppants are made by grinding or dispersing ore to a fine powder, combining the powder into small pellets and firing the pellets in a rotary kiln. We use three different methods to produce ceramic proppant. Industrial ceramic media follows a similar process. Our plant in McIntyre, Georgia uses a dry process, which utilizes clay, bauxite, bauxitic clay or kaolin. The raw material is ground, pelletized and screened. The manufacturing process is completed by firing the product in a rotary kiln. Our plants in Eufaula, Alabama, Toomsboro, Georgia, and Millen, Georgia, use a wet process, which starts with kaolin that is formed into slurry. The slurry is then pelletized in a dryer and the pellets are then fired in a rotary kiln. The portion of our plant in New Iberia, Louisiana that manufactures ceramic proppant, as well as one line at our Eufaula, Alabama facility, uses a new manufacturing process associated with the Company’s KRYPTOSPHERE product line. Our rotary kilns are primarily heated by the use of natural gas. Patent Protection and Intellectual Property We make ceramic proppant and ceramic media used in foundry and scouring processes (the latter two items comprising a minimal volume of overall sales) by processes and techniques that involve a high degree of proprietary technology, some of which is protected by patents. We own multiple patents in the United States and various foreign countries that relate to different types of ceramic proppant and production methods used for ceramic proppant and media; however, depending on market conditions, production of products pursuant to these patents may not necessarily constitute a material portion of our output. We also own multiple U.S. and foreign patents that relate to methods for the detection of subterranean fractures and material, including gravel packs, in the near-borehole region. We also own multiple U.S. patents that relate to detectable proppant. During 2014 and 2015, we obtained three U.S. patents relating to our KRYPTOSPHERE manufacturing process, and during 2017, we obtained one U.S. patent covering the KRYPTOSPHERE product. We expect these patents to provide assistance in the future sales of this product line. During 2015, 2016 and 2017, we obtained four U.S. patents relating to our far-field proppant detection products, systems, and methods which relate to our iON™ product line and the QUANTUM™ service line, which are still under development. 6 We own multiple U.S. patent applications (together with a number of counterpart applications pending in foreign jurisdictions). A portion of the U.S. patent applications cover ceramic proppant, detectable proppant, processes for making ceramic proppant and detectable proppant, detection of subterranean fractures, and our GUARDTM, FUSION and AIR™ product lines and methods for making and using these products. Another portion of the U.S. patent applications cover non-oilfield or industrial products, such as water treatment compositions, foundry media, building materials and ceramic media for use in solar power plants. The applications are in various stages of the patent prosecution process, and patents may not issue on such applications in any jurisdiction for some time, if they issue at all. AGPI (formerly Falcon) owns three U.S. patents, which expire in 2026, 2027 and 2034 and relate to construction of secondary containment areas. In addition, AGPI owns four U.S. patents, which expire in 2030 and 2031 and relate to polyurea-encapsulated tank bases. AGPI also owns multiple U.S. patent applications (together with a number of counterpart applications pending in foreign jurisdictions), each of which relates to tank bases or methods of constructing secondary containment areas. d We believe that our patents have historically been important in enabling us to compete in the market to supply proppant to the natural gas and oil industry. We intend to enforce, and have in the past vigorously enforced, our patents. We may from time to time be involved in litigation to determine the enforceability, scope and validity of our patent rights. In addition to patent rights, and perhaps more notably, we use a significant amount of trade secrets, or “know-how,” and other proprietary information and technology in the conduct of our business. None of this “know-how” and technology is licensed from third parties. However, we have negotiated a long term license for some third party intellectual property used or jointly developed in connection with our QUANTUM service line. Seasonality Historically, our business has not been subject to regular material seasonality fluctuations. However, with the activity in resource plays in the northern and eastern United States, we have experienced higher levels of proppant sales activities during warmer weather periods and less during colder weather months. In addition, sales activities can be decreased by the spring snow and ice “break-up” in Canada, North Dakota, Montana, and the Northeast U.S., as well as the winter holidays in December and January. Environmental and Other Governmental Regulations We believe that our operations are in substantial compliance with applicable domestic and foreign federal, state and local environmental and safety laws and regulations. Existing federal environmental requirements such as the Clean Air Act and the Clean Water Act, as amended, impose certain restrictions on air and water pollutants from our operations via permits and regulations. Those pollutants include volatile organic compounds, nitrogen oxides, sulfur dioxide, particulate matter, storm water and wastewater discharges and other by-products. In addition to meeting environmental requirements for existing operations, we must also demonstrate compliance with environmental regulations in order to obtain permits prior to any future expansion. The United States Environmental Protection Agency (“EPA”) and state programs require covered facilities to obtain individual permits or have coverage under an EPA general permit issued to groups of facilities. A number of federal and state agencies, including but not limited to, the EPA, the Texas Commission of Environmental Quality, the Louisiana Department of Environmental Quality, the Alabama Department of Environmental Management, the Wisconsin Department of Natural Resources, and the Georgia Environmental Protection Division, have environmental regulations applicable to our operations in the states in which we do business. Historically we have been able to obtain permits, where necessary, to build new facilities and modify existing facilities that allow us to continue compliant operations. Obtaining these permits in a timely manner will continue to be an important factor in our ability to do so in the future. Employees As of December 31, 2017, we had 424 employees worldwide. In addition to the services of our employees, we employ the services of consultants as required. Our employees are not represented by labor unions. There have been no work stoppages or strikes during the last three years that have resulted in the loss of production or production delays. We believe our relations with our employees are satisfactory. Executive Officers of the Registrant Gary A. Kolstad (age 59) was elected in June 2006, by our Board of Directors to serve as President and Chief Executive Officer and a Director of the Company. Mr. Kolstad previously served in a variety of positions over 21 years with Schlumberger. Mr. Kolstad became a Vice President of Schlumberger in 2001, where he last held the positions of Vice President, Oilfield Services – U.S. Onshore and Vice President, Global Accounts. 7 Ernesto Bautista III (age 46) joined the Company as a Vice President and Chief Financial Officer in January 2009. From July 2006 until joining the Company, Mr. Bautista served as Vice President and Chief Financial Officer of W-H Energy Services, Inc., a Houston, Texas based diversified oilfield services company (“W-H Energy”). From July 2000 to July 2006, he served as Vice President and Corporate Controller of W-H Energy. From September 1994 to May 2000, Mr. Bautista served in various positions at Arthur Andersen LLP, most recently as a manager in the assurance practice, specializing in emerging, high growth companies. Mr. Bautista is a certified public accountant in the State of Texas. Don P. Conkle (age 53) was appointed Vice President, Marketing and Sales in October 2012. Mr. Conkle previously held a variety of domestic and international managerial positions in engineering, marketing and sales, and technology development over a 26 year period with Schlumberger. He served in the positions of Vice President of Stimulation Services from 2007 until 2009, as GeoMarket Manager (Qatar & Yemen) from 2009 until 2011 and as Production Group Marketing and Technology Director from 2011 until he joined the Company. r Roger Riffey (age 59) joined the Company in July 2006 as Director of Logistics and Customer Service. He was appointed Plant Manager of the Toomsboro, Georgia, facility in July 2010, and was named Vice President, Manufacturing in May 2013. Previously, Mr. Riffey held positions with Rio Tinto Energy in Special Projects, U.S. Borax as Global Logistics Manager and Kerr-McGee Coal Corporation as Manager of Marketing. Robert J. Willette (age 42) joined the Company in October 2017 as Vice President, General Counsel, Corporate Secretary and Chief Compliance Officer. Prior to his current role, Mr. Willette served as General Counsel and Corporate Secretary for Texon Distributing L.P. beginning in 2009. From 2006 to 2009, Mr. Willette served as Corporate Counsel for Ferrellgas L.P. All officers are elected for one-year terms or until their successors are duly elected. There are no arrangements between any officer and any other person pursuant to which he was selected as an officer. There is no family relationship between any of thet named executive officers or between any of them and the Company’s directors. Forward-Looking Information The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. This Form 10-K, our Annual Report to Shareholders, any Form 10-Q or any Form 8-K of the Company or any other written or oral statements made by or on behalf of the Company may include forward-looking statements which reflect the Company’s current views with respect to future events and financial performance. The words “believe”, “expect”, “anticipate”, “project”, “estimate”, “forecast”, “plan” or “intend” and similar expressions identify forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, each of which speaks only as of the date the statement was made. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Our forward- looking statements are based on assumptions that we believe to be reasonable but that may not prove to be accurate. All of our forward-looking information is subject to risks and uncertainties that could cause actual results to differ materially from the results expected. Although it is not possible to identify all factors, these risks and uncertainties include the risk factors discussed below. Our results of operations could be adversely affected if our business assumptions do not prove to be accurate or if adverse changes occur in our business environment, including but not limited to: • • • • • • • • • changes in the cost of raw materials and natural gas used in manufacturing our products; risks related to our ability to access needed cash and capital; our ability to meet our current and future debt service obligations, including our ability to maintain compliance with our debt covenants; our ability to manage distribution costs effectively; our ability to successfully implement strategic changes in our business; changes in demand and prices charged for our products; technological, manufacturing and product development risks; our dependence on and loss of key customers and end users; potential declines or increased volatility in oil and natural gas prices that adversely affect our customers, the energy industry or our production costs; 8 • • • • • • • • • • • • • • potential reductions in spending on exploration and development drilling in the oil and natural gas industry that reduce demand for our products and services; seasonal sales fluctuations; an increase in competition in the proppant market, including imports from foreign countries; logistical and distribution challenges relating to certain resource plays that do not have the type of infrastructure systems that are needed to efficiently support oilfield services activities; the development of alternative stimulation techniques that would not benefit from the use of our existing products and services, such as extraction of oil or gas without fracturing; changes in foreign and domestic governmental regulations, including environmental restrictions on operations and regulation of hydraulic fracturing; increased regulation of emissions from our manufacturing facilities; the development and utilization of alternative proppants for use in hydraulic fracturing; general global economic and business conditions; weather-related risks and other risks and uncertainties; changes in foreign and domestic political and legislative risks; risks of war and international and domestic terrorism; risks associated with foreign operations and foreign currency exchange rates and controls; and the potential expropriation of assets by foreign governments. Our results of operations could also be adversely affected as a result of worldwide economic, political and military events, including, but not limited to, war, terrorist activity or initiatives by the Organization of the Petroleum Exporting Countries (“OPEC”). For further information, see “Item 1A. Risk Factors.” Available Information Our annual reports on Form 10-K, proxy statements, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (“Exchange Act”) are made available free of charge on our internet website at http://www.carboceramics.com as soon as reasonably practicable after such material is filed with, or furnished to, the Securities and Exchange Commission (“SEC”). The public may read and copy any materials that we file with the SEC at the SEC’s Public Reference Room at 100 F Street, Room 1580, N.E., Washington, D.C. 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, at http://www.sec.gov. Item 1A. Risk Factors You should consider carefully the trends, risks and uncertainties described below and other information in this Form 10-K and subsequent reports filed with the SEC before making any investment decision with respect to our securities. If any of the following trends, risks or uncertainties actually occurs or continues, our business, financial condition or operating results could be materially adversely affected, the trading prices of our securities could decline, and you could lose all or part of your investment. Our business and financial performance largely depends on the level of activity in the natural gas and oil industries. Our operations are materially dependent upon the levels of activity in natural gas and oil exploration, development and production. More specifically, the demand for our products is closely related to the number of natural gas and oil wells completed in geologic formations where ceramic or sand proppants are used in fracture treatments. These activity levels are affected by both short- term and long-term trends in oil and natural gas prices. In recent years, oil and natural gas prices and, therefore, the level of exploration, development and production activity, have experienced significant fluctuations. Worldwide economic, political and military events, including war, terrorist activity, events in the Middle East and initiatives by OPEC, have contributed, and are likely to continue to contribute, to price volatility. Despite recent initiatives to curb supply, the global supply of oil is currently at historically 9 high levels, and there is potential for geopolitical and regulatory events, such as normalization of trade relations with the Islamic Republic of Iran, to further increase the supply of oil. Additionally, warmer than normal winters in North America and other weather patterns may adversely impact the short-term demand for natural gas and, therefore, demand for our products and services. Natural gas prices experienced a significant decline during 2012 and, although they have increased since then, remain relatively low on an historic basis, resulting in generally lower gas drilling activity. Further, the price of oil declined precipitously from the second half of 2014 through mid-2016 and, although the price has rebounded from its low, it still remains at weakened levels for industry activity. This reduction in oil and natural gas prices has depressed the level of natural gas and oil exploration, development, production and well completions activity, resulting in significantly reduced demand and pricing for our products. This decline has had, and continues to have, a significant adverse impact on our results. If oil and natural gas prices and well completion activity do not materially improve and/or demand for our products does not otherwise increase, this decline could reasonably be expected to have a material adverse effect on our financial condition or operations, including, but not limited to, the temporary idling of all, or a portion of all, of our facilities until such time as market conditions improve. We may not have sufficient cash and/or be able to access liquidity alternatives in the credit and capital markets to meet our liquidity needs. Our primary sources of liquidity are cash on hand and cash flow from operations. Our ability to fund our working capital and capital expenditures and other obligations depends on our future operating performance and cash from operations and other liquidity- generating transactions, which are in turn subject to prevailing oil and natural gas prices, economic conditions and other factors, many of which are beyond our control. If our future operating performance falls materially below our expectations, our plans prove to be materially inaccurate, or industry conditions do not materially improve, we may require additional financing. Even if additional or alternative financing becomes available to us, future financing transactions may significantly increase the Company’s interest expense, which could in turn reduce our financial flexibility and our ability to fund other activities, and could make us more vulnerable to changes in operating performance or economic downturns generally. The inability to generate sufficient cash, modify our New Credit Agreement, or obtain replacement or additional financing, or an event of default under our New Credit Agreement, could have a material adverse effect on our financial condition. We therefore cannot provide any assurance that we will be able to access the capital or credit markets on acceptable terms or timing, or at all. Access to the capital markets and the cost and availability of credit may be adversely affected by factors beyond our control, including turmoil in the financial services industry, volatility in securities trading markets, the continuing downturn in the oil and gas industry and general economic conditions. Currently, we do not qualify as a “well-known seasoned issuer,” which otherwise would allow us to, among other things, file automatically effective shelf registration statements. Now, even if we are able to access the public capital markets, any attempt to do so could be more expensive or subject us to significant delays when compared with previous periods. Our business and financial performance has suffered and could suffer further if the levels of hydraulic fracturing continue to decline or cease as a result of the low commodity price of oil and natural gas, development of new processes, increased regulation or a continued decrease in drilling activity. tt Substantially all of our products are proppants used in the completion and re-completion of natural gas and oil wells through thet process of hydraulic fracturing. Completion activity is directly impacted by the price of oil and natural gas. In addition, demand for our proppants is substantially higher in the case of horizontally drilled wells, which allow for multiple hydraulic fractures within the same well bore but are more expensive to develop than vertically drilled wells. A reduction in horizontal drilling or the development of new processes for the completion of natural gas and oil wells leading to a reduction in, or discontinuation of the use of, hydraulic fracturing could cause a decline in demand for our products. Additionally, increased regulation or environmental restrictions on hydraulic fracturing or the materials used in this process could negatively affect our business by increasing the costs of compliance or resulting in operational delays, which could cause operators to abandon the process due to commercial impracticability. Moreover, future federal, state, local or foreign laws or regulations could otherwise limit or ban hydraulic fracturing. Several states in which our customers operate have adopted, or are considering adopting, regulations that have imposed, or could impose, more stringent permitting, transparency, disposal and well construction requirements on hydraulic fracturing operations. Some states, such as New York, have banned the process of hydraulic fracturing altogether. Any of these events could have a material adverse effect on our results of operations and financial condition. As stated elsewhere, the upstream oil and natural gas industry is in the midst of a severe contraction, resulting in a significant reduction in horizontal drilling and further resulting in a material decline in demand for our products and services. 10 We face distribution and logistical challenges in our business As oil and natural gas prices fluctuate, our customers may shift their focus back and forth between different resource plays, some of which can be located in geographic areas that do not have well-developed transportation and distribution infrastructure systems. Transportation and logistical operating expenses continue to comprise a significant portion of our total delivered cost of sales. Therefore, serving our clients in these less-developed areas presents distribution and other operational challenges that affect our sales and negatively impact our operating costs. Disruptions in transportation services, including shortages of rail cars or a lack of rail transportation services or developed infrastructure, could affect our ability to timely and cost effectively deliver products to our customers and could provide a competitive advantage to competitors located in closer proximity to customers. Additionally, increases in the price of diesel fuel could negatively impact operating costs if we are unable to pass those increased costs along to our customers. Failure to find long-term solutions to these logistical challenges could adversely affect our ability to respond quickly to the needs of our customers or result in additional increased costs, and thus could negatively impact our results of operations and financial condition. We operate in an increasingly competitive market. The proppant market is highly competitive. We compete with other domestic and international suppliers of ceramic proppant, as well as with suppliers of sand for use as proppant, in the hydraulic fracturing of natural gas and oil wells. The expiration of key patents owned by the Company has resulted in additional competition in the market for ceramic proppant. The entry of additional competitors into the market to supply ceramic proppant and/or a surge in the level of ceramic proppant imports into North America from existing competitors could have a material adverse effect on our results of operations and financial condition. We have been and may continue to be adversely affected by decreased demand for our proppant or the development by our competitors of alternative proppants. Ceramic proppant is a premium product capable of withstanding higher pressure and providing more highly conductive fractures than mined sand, which is the most commonly used proppant type. We continue to see operators that have traditionally used ceramic proppant shifting to use mined sand instead. Despite recently improving commodity prices in the oil and natural gas industry, continued pressure on operators to reduce cost or to evaluate returns on a shorter horizon has had a detrimental impact on the demand for ceramic proppant, which is a higher cost product than mined sand. Although we believe that the use of quality ceramic proppant in appropriate geologic formations typically generates higher production rates and more favorable long-term production economics thant mined sand, the shifting of customer demand to lower cost products, such as mined sand, has had an adverse effect on our results of operations and its continuation could have a material adverse effect on our financial condition. The development and use of alternative proppant could also cause a decline in demand for our products, and could have a material adverse effect on our results of operations and financial condition. We have no current plans to pay cash dividends on our common stock for the foreseeable future and our Amended Credit Agreement contains restrictions on our ability to pay dividends; therefore, you may not receive any return on investment unless you sell your common stock for a price greater than you paid. We do not plan to declare dividends on shares of our common stock in the foreseeable future. In addition, our Amended Credit Agreement prohibits us from paying such dividends. We currently intend to retain any future earnings to finance the operation of our business and meet our debt obligations. As a result, you may only receive a return on your investment in our common stock if thet market price of our common stock increases. Further, one of our financing options involves the issuance of equity securities, which would dilute current stockholders and could reduce our stock price. The outstanding indebtedness under our New Credit Agreement is secured by a substantial portion of our domestic assets and guaranteed by our two domestic operating subsidiaries, subject to certain exceptions. The outstanding indebtedness under our New Credit Agreement is secured by (i) a pledge of all accounts receivable and inventory, (ii) cash in certain accounts, (iii) domestic distribution assets residing on owned real property, (iv) our Marshfield, Wisconsin and Toomsboro, Georgia plant facilities and equipment, and (v) certain real property interests in mines and minerals. In the event of a default, our lenders may (1) elect to declare all outstanding borrowings made under the New Credit Agreement and the guaranties of the two operating subsidiaries, together with accrued interest and other fees, to be immediately due and payable; (2) exercise their set-off rights; and/or (3) enforce and foreclose on their security interest and liquidate some or all of such pledged assets. Any of these actions could, individually or in the aggregate, have a substantial negative impact on our financial condition and results of operations. d d 11 We rely upon, and receive a significant percentage of our revenues from, a limited number of key customers and end users. During 2017, our key customers included several of the largest participants in the worldwide petroleum pressure pumping industry. Two of these customers each accounted for more than 10% of our 2017 revenues. However, the end users of our products are numerous operators of natural gas and oil wells that hire pressure pumping service companies to hydraulically fracture wells. During 2017, a majority of our ceramic proppant sales were directed to a concentrated number of end users. We generally supply our domestic pumping service customers with products on a just-in-time basis, with transactions governed by individual purchase orders and/or a master supply agreement. Because of their purchasing power, our key customers may have greater bargaining leverage than us with respect to the negotiation of prices and other terms of the sale in their supply contracts with us, which in turn, could adversely affect our profit margins associated with those contracts. Disparities in bargaining leverage, when combined with the Company’s desire to maintain long-term relationships with key customers, could limit our practical ability to assert certain terms of our supply agreements with them. Continuing sales of our products depend on our direct customers and the end user well operators being satisfied with product quality, pricing, availability, and delivery performance. While we believe we have satisfactory relations with our customers and our end users, a material decline in the level of sales to any one of our major customers or loss of a key end user due to unsatisfactory product performance, pricing, delivery delays or any other reason could have a material adverse effect on our results of operations and financial condition. tt The operations of our customers, and thus the results of our operations, are subject to a number of operational risks, interruptions and seasonal trends. As hydraulic fracturing jobs have increased in size and intensity, common issues such as weather, equipment delays or changes in the location and types of oil and natural gas plays can result in increased variability in proppant sales volumes. Our business operations and those of our customers involve a high degree of operational risk. Natural disasters, adverse weather conditions, collisions and operator error could cause personal injury or loss of life, severe damage to and destruction of property, equipment and the environment, and suspension of operations. Our customers perform work that is subject to unexpected or arbitrary interruption or termination. The occurrence of any of these events could result in work stoppage, loss of revenue, casualty loss, increased costs and significant liability to third parties. With the increase in resource plays in the northern and eastern United States, as well as our operations in Marshfield, Wisconsin, our results of operations are increasingly exposed to seasonal variations and inclement weather. Operations in certain regions involve more seasonal risk in the winter months, and work is hindered during other inclement weather events. This variability makes it more difficult to predict sales and can result in greater fluctuations to our quarterly financial results. These quarterly fluctuations could result in operating results that are below the expectations of public market analysts and investors, and therefore may adversely affect the market price for our common stock. a t The ability of our customers to complete work, as well as our ability to mine sand from cold climate areas, could be affected during the winter months. Our revenue and profitability could decrease during these periods, as well as in other severe weather conditions, because work is either prevented or more costly to complete. If a substantial amount of production is interrupted, our cash flow and, in turn, our results of operations could be materially and adversely affected. Our North American ceramic proppant production is manufactured at two plants. The vast majority of our mined sand is processed at one plant. Any adverse developments at those plants could have a material adverse effect on our financial condition and results of operations. With the mothballing of our Millen plant and the very limited production at our McIntyre plant, we are producing the majority of our North American ceramic production from two plants, our Eufaula and our Toomsboro plant. Our Marshfield, Wisconsin plant represents the vast majority of our annual mined sand processing capacity. Any adverse developments at these plants, including a material disruption in production, an inability to supply the plant with raw materials at a competitive cost, or adverse developments due to catastrophic events, could have a material adverse effect on our financial condition and results of operations. We provide environmental warranties on certain of our containment and spill prevention products. AGPI’s tank liners, secondary containments and related products and services are designed to contain or avoid spills of hydrocarbons and other materials. If a release of these materials occurs, it could be harmful to the environment. Although we attempt to negotiate appropriate limitations of liability in the applicable terms of sale, some customers have required expanded warranties, indemnifications or other terms that could hold AGPI responsible in the event of a spill or release under particular circumstances. If AGPI is held responsible for a spill or release of materials from one of its customer’s facilities, it could have a material adverse effect on our results of operations and financial condition. 12 We rely upon intellectual property to protect our proprietary rights. Failure to protect our intellectual property rights may affect our competitive position, and protecting our rights or defending against third-party allegations of infringement may be costly. The Company uses a significant amount of trade secrets, or “know-how,” and other proprietary information and technology in the conduct of its business. In some cases, we rely on trade secrets, trademarks or contractual restrictions to protect intellectual property rights that are not patented. The steps we take to protect the non-patented intellectual property may not be sufficient to protect it and any loss or diminishment of such intellectual property rights could negatively impact our competitive advantage. Additionally, our competitors could independently develop the same or similar technologies that are only protected by trade secret and thus do not prevent third parties from competing with us. Furthermore, even protected intellectual property rights can be infringed upon by third parties. Monitoring unauthorized use of Company intellectual property can be difficult and expensive, and adequate remedies may not be available. Although the Company does not believe that it is infringing upon the intellectual property rights of others by using such proprietary information and technology, it is possible that such a claim might be asserted against the Company in the future. In the event any third party makes a claim against us for infringement of patents or other intellectual property rights of a third party, such claims, with or without merit, could be time-consuming and result in costly litigation. In addition, the Company could experience loss or cancellation of customer orders, experience product shipment delays, or be subject to significant liabilities to third parties. If our products or services were found to infringe on a third party’s proprietary rights, the Company could be required to enter into royalty or licensing agreements to continue selling its products or services. Royalty or licensing agreements, if required, may not be available on acceptable terms, if at all, which could seriously harm our business. Involvement in any patent dispute or other intellectual property dispute or action to protect trade secrets and expertise could have a material adverse effect on the Company’s business. rr Significant increases in fuel prices for any extended periods of time will increase our operating expenses. The price and supply of natural gas are unpredictable, and can fluctuate significantly based on international, political and economic circumstances, as well as other events outside of our control, such as changes in supply and demand due to weather conditions, actions by OPEC and other oil and gas producers, regional production patterns and environmental concerns. Natural gas is a significant component of our direct manufacturing costs and price escalations will likely increase our operating expenses and can have a negative impact on income from operations and cash flows. We operate in a competitive marketplace and may not be able to pass through all of the increased costs that could result from an increase in the cost of natural gas. d Environmental compliance costs and liabilities could reduce our earnings and cash available for operations. We are subject to increasingly stringent laws and regulations relating to environmental protection, including laws and regulations governing air emissions, water discharges and waste management. The technical requirements of complying with these environmental laws and regulations are becoming increasingly expensive and complex, and may affect the Company’s ability to expand its operations. Our ability to continue the expansion of our manufacturing capacity to meet market demand is contingent upon obtaining required environmental permits and compliance with their terms, which continue to be more restrictive and require longer lead times to obtain in anticipation of any efforts to expand and increase capacity. We incur, and expect to continue to incur, capital and operating costs to comply with environmental laws and regulations. t In addition, we use some hazardous substances and generate certain industrial wastes in our operations. Many of our current and former properties are, or have been, used for industrial purposes. Accordingly, we could become subject to potentially material liabilities relating to the investigation and cleanup of contaminated properties, and to claims alleging personal injury or property damage as the result of exposures to, or releases of, hazardous substances. These laws also may provide for “strict liability” for damages to natural resources or threats to public health and safety. Strict liability can render a party liable for environmental damage without regard to negligence or fault on the part of the party. Some environmental laws provide for joint and several strict liability for remediation of spills and releases of hazardous substances. Stricter enforcement of existing laws and regulations, new laws and regulations, the discovery of previously unknown contamination or the imposition of new or increased requirements could restrict our expansion efforts, require us to incur costs, or become the basis of new or increased liabilities. Any of these events could reduce our earnings and our cash available for operations. 13 Our international operations subject us to risks inherent in doing business on an international level that could adversely impact our results of operations. International revenues accounted for approximately 21%, 34% and 29% of our total revenues in 2017, 2016 and 2015, respectively. We may not succeed in overcoming the risks that relate to or arise from operating in international markets. Risks inherent in doing business on an international level include, among others, the following: • • • • • • • • • • economic and political instability (including as a result of the threat or occurrence of armed international conflict or terrorist attacks); potential declines or increased volatility in oil and natural gas prices that would adversely affect our customers, the energy industry or our production costs; changes in regulatory requirements, economic sanctions, tariffs, customs, duties and other trade barriers; transportation delays and costs; power supply shortages and shutdowns; difficulties in staffing and managing foreign operations and other labor problems; currency rate fluctuations, convertibility and repatriation; taxation of our earnings and the earnings of our personnel; potential expropriation of assets by foreign governments; and other risks relating to the administration of or changes in, or new interpretations of, the laws, regulations and policies of the jurisdictions in which we conduct our business. Undetected defects in our fracture simulation software could adversely affect our business. Despite extensive testing, our software could contain defects, bugs or performance problems. If any of these problems are not detected, the Company could be required to incur extensive development costs or costs related to product recalls or replacements. The existence of any defects, errors or failures in our software products may subject us to liability for damages, delay the development or release of new products and adversely affect market acceptance or perception of our software products or related services, any one of which could materially and adversely affect the Company’s business, results of operations and financial condition. The market price of our common stock will fluctuate, and could fluctuate significantly. The market price of the Company’s common stock will fluctuate, and could fluctuate significantly, in response to various factors and events, including the following: • • • • • • • • the liquidity of the market for our common stock; seasonal or quarterly sales fluctuations; differences between our actual financial or operating results and those expected by investors and analysts; changes in analysts' recommendations or projections; a substantial short position in our stock; new statutes or regulations or changes in interpretations of existing statutes and regulations affecting our business; changes in general economic or market conditions; and broad market fluctuations. Our actual results could differ materially from results anticipated in forward-looking statements we make. Some of the statements included or incorporated by reference in this Form 10-K are forward-looking statements. These forward-looking statements include statements relating to trends in the natural gas and oil industries, the demand for ceramic proppant and our performance in the "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Business" sections of this Form 10-K. In addition, we have made and may continue to make forward-looking statements in other filings with the SEC, and in written material, press releases and oral statements issued by us or on our behalf. Forward-looking statements include statements regarding the intent, belief or current expectations of the Company or its officers. Our actual results could differ materially 14 from those anticipated in these forward-looking statements, and our financial forecasts are particularly sensitive to changes in the current market conditions. Further, our financial forecasts have been less accurate during the recent downturn. See "Business– Forward-Looking Information." The success of our business depends on achieving our strategic objectives, including the diversification of our product and service portfolio. As we continue to expand our portfolio of product and service offerings to industrial and other new markets, we face certain risks associated with these new business strategies, including unknown regulatory changes and product acceptance by these new markets, that could affect our future financial results. In addition, lower than expected sales in these new markets could have a material adverse effect on our results from operations and financial condition. Item 1B. Unresolved Staff Comments Not applicable. Item 2. Properties We maintain our corporate headquarters in leased office space in Houston, Texas and also lease space for our technology center in Houston. We own our manufacturing facilities, land and substantially all of the related production equipment in New Iberia, Louisiana, and Eufaula, Alabama, and lease our McIntyre, Toomsboro, and Millen, Georgia, facilities. We own the buildings and production equipment at our facility in Luoyang, China, and have been granted use of the land on which the facility is located through 2051 under the terms of a land use agreement with the People’s Republic of China. The Luoyang, China facility was shut down during 2015, and we do not intend to resume production. The facilities in McIntyre and Toomsboro, Georgia, include real property, plant and equipment that we lease from the Development Authority of Wilkinson County. The original lease was executed in 1997 and was last amended in 2008. The term of the current lease, which covers both locations was automatically extended through November 1, 2021. Under the terms of the lease, we are responsible for all costs incurred in connection with the premises, including costs of construction of the plant and equipment. At the termination of the lease, title to all of the real property, plant and equipment is to be conveyed to us in exchange for nominal consideration. We have the right to purchase the property, plant and equipment at any time during the term of the lease for a nominal price. r In November 2012, we entered into a lease with the Development Authority of Jenkins County for the land and improvements associated with the construction of a plant in Millen, Georgia. The lease term continues until the tenth anniversary of the completion of the last phase of the facility. Similar to lease terms of the two other Georgia facilities, the Millen lease requires us to be responsible for all costs (including construction costs) incurred in connection with the premises. Moreover, title to the real property, plant and equipment of the facility is to be conveyed to us at the end of the lease term for nominal consideration, and may be purchased by us at any time for a nominal price. We completed construction and commenced operations of the first 250 million pound ceramic production line in Millen during 2014. We began the construction on a second 250 million pound production line in Millen. However, due to current market conditions, the construction and completion of this second line has been suspended until market conditions warrant completion. The Marshfield, Wisconsin sand processing plant, which became operational during 2012, is located on land owned by us. We decided not to move forward with construction of a resin coating plant in Marshfield, Wisconsin for which we had previously developed engineering plans and procured certain equipment that had long-lead delivery times. We own or otherwise utilize distribution facilities in multiple locations around the world. See “Item 1. Business – Distribution.” We own approximately 4,618 acres of land and leasehold interests near our plants in Georgia and Alabama. The land contains raw material for use in the production of our lightweight ceramic proppants. We also hold approximately 113 acres of land and leasehold interests in Wisconsin. AGPI owns its service facility located in Decatur, Texas, and leases other regional service facilities within the United States. 15 Item 3. Legal Proceedings From time to time, we are the subject of legal proceedings arising in the ordinary course of business. We do not believe that any of these proceedings will have a material adverse effect on our business or our results of operations. Item 4. Mine Safety Disclosure Several of our U.S. manufacturing facilities process mined minerals, and therefore are viewed as mine operations subject to regulation by the federal Mine Safety and Health Administration under the Federal Mine Safety and Health Act of 1977. Information concerning mine safety violations or other regulatory matters required by section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the recently proposed Item 106 of Regulation S-K (17 CFR 229.106) is included in Exhibit 95 to this annual report. 16 PART II Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities Common Stock Market Prices, Dividends and Stock Repurchases Our common stock is traded on the New York Stock Exchange (ticker symbol CRR). The number of record and beneficial holders of our common stock as of February 1, 2018 was approximately 11,515. The following table sets forth the high and low sales prices of our common stock on the New York Stock Exchange and dividends for the last two fiscal years: Quarter Ended March 31 ................................................................................... $ 16.28 13.04 June 30 ...................................................................................... 8.79 September 30............................................................................. 10.66 December 31 ............................................................................. High Low $ 10.26 6.02 6.12 6.44 2017 Sales Price 2016 Cash Dividends Declared — — — — Sales Price High $ 23.68 16.70 14.91 11.87 Low $ 14.20 10.63 10.00 6.08 Cash Dividends Declared — — — — In January 2016, our Board of Directors suspended our policy of paying quarterly cash dividends, and there can be no assurance as to the payment of future dividends because they depend on future earnings, capital requirements and financial condition. On January 28, 2015, our Board of Directors authorized the repurchase of up to two million shares of our common stock. Shares are effectively retired at the time of purchase. As of March 7, 2018, we had not repurchased any shares under this plan. Securities Authorized for Issuance Under Equity Compensation Plans For information regarding securities authorized for issuance under equity compensation plans, refer to “ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS” and “NOTE 10 — Stock Based Compensation” in the accompanying “Notes to Consolidated Financial Statements” in this Annual Report. The following table provides information about our repurchases of common stock during the quarter ended December 31, 2017, all of which represent shares surrendered to us for tax withholding obligations upon the vesting of restricted stock: ISSUER PURCHASES OF EQUITY SECURITIES Period 10/01/17 to 10/31/17 ............................................................................ 11/01/17 to 11/30/17 ............................................................................ 12/01/17 to 12/31/17 ............................................................................ Total................................................................................................ Total Number of Shares Purchased Average Price Paid per Share 514 (3)$ — — 514 8.63 — — Total Number of Shares Purchased as Part of Publicly Announced Plan (1) Maximum Number of Shares that May be Purchased Under the Plan (2) 2,000,000 2,000,000 2,000,000 — — — — (1) On January 28, 2015, we announced the authorization by our Board of Directors for the repurchase of up to two million shares of our Common Stock. (2) Represents the maximum number of shares that may be repurchased under the plan as of period end. As of March 7, 2018, a maximum of 2,000,000 shares may be repurchased under the plan. (3) Represents shares of stock withheld for the payment of withholding taxes upon the vesting of restricted stock. 17 Stock Performance Graph The graph below compares the cumulative shareholder return on our common stock with the cumulative returns of the the S&P 500 index, and the S&P SmallCap 600 - Oil & Gas Equipment & Services index. The graph tracks the performance of a $100 investment in our common stock and in each of the indexes (with the reinvestment of all dividends) from December 31, 2012 to December 31, 2017. COMPARISON OF 5 YEAR CUMULATIVE TOTAL RETURN* Among CARBO Ceramics Inc., the S&P 500 Index, and S&P SmallCap 600 - Oil & Gas Equipment & Services Index $250 $200 $150 $100 $50 $0 12/12 3/13 6/13 9/13 12/13 3/14 6/14 9/14 12/14 3/15 6/15 9/15 12/15 3/16 6/16 9/16 12/16 3/17 6/17 9/17 12/17 CARBO Ceramics Inc. S&P 500 S&P SmallCap 600 - Oil & Gas Equipment & Services Index *$100 invested on 12/31/12 in stock or index, including reinvestment of dividends. Fiscal year ending December 31. Copyright© 2018 Standard & Poor's, a division of S&P Global. All rights reserved. 18 Item 6. Selected Financial Data The following selected financial data are derived from our audited consolidated financial statements. The data should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the consolidated financial statements and notes thereto included elsewhere in this Form 10-K. Statement of Income Data: Revenues........................................................................... Cost of sales ...................................................................... Gross (loss) profit ............................................................. Selling, general, & administrative expenses..................... Other operating expenses (income) (1)............................. Operating (loss) profit....................................................... Other (expense) income, net ............................................. (Loss) income before income taxes .................................. Income tax (benefit) expense............................................ Net (loss) income .............................................................. (Loss) earnings per share: 2017 Years ended December 31, 2016 2014 2015 ($ in thousands, except per share data) $ 188,756 $ 242,081 (53,325) 42,533 152,525 (248,383) (6,760) (255,143) (2,027) $ (253,116) $ 279,574 $ 103,051 $ 335,699 188,065 (56,125) (85,014) 62,199 39,984 44,908 904 (163,232) (125,902) (517) (5,306) (163,749) (131,208) (51,081) (54,205) (80,127) $ (109,544) $ 648,325 $ 467,045 181,280 72,535 15,890 92,855 16 92,871 37,283 55,588 $ 2013 667,398 474,403 192,995 68,447 (43) 124,591 610 125,201 40,315 84,886 Basic ............................................................................ Diluted ......................................................................... $ $ (9.49) $ (9.49) $ (3.29) $ (3.29) $ (4.76) $ (4.76) $ 2.41 $ 2.41 $ 3.67 3.67 2017 December 31, 2016 2014 2015 ($ in thousands, except per share data) 2013 Balance Sheet Data: Current assets.................................................................... $ Current liabilities .............................................................. Property, plant and equipment, net ................................... Total assets........................................................................ Total shareholders’ equity ................................................ Cash dividends per share .................................................. 195,797 42,431 324,186 540,598 405,765 — $ 217,223 34,804 494,103 723,457 616,570 — $ $ 285,277 70,290 537,731 836,369 642,306 0.63 $ $ 337,611 77,415 568,716 934,226 776,057 1.26 $ $ 371,382 56,688 478,535 878,951 768,587 1.14 (1) Other operating expenses primarily include gains/losses on disposal or impairment of assets. In 2017, it also included a loss on the sale of our Russian proppant business. 19 Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations Executive Level Overview CARBO Ceramics Inc. is a technology company that generates revenue primarily through the sale of products and services to the global oil and natural gas industry for production enhancement and environmental products and services, and through the sale of products and services to industrial market segments. The Company conducts its business within two operating segments: 1) Oilfield Technologies and Services and 2) Environmental Products and Services. These two operating segments provide products and services to several market segments in the oil and gas, and the industrial markets. Our Environmental Products and Services segment is limited to production and sales by our AGPI subsidiary. Our Oilfield Technologies and Services segment includes the manufacturing and selling of proppant products for use primarily in the hydraulic fracturing of oil and natural gas wells, FracPro software for the design of fracture treatments, and StrataGen consulting services for the optimization of well completions. These products include ceramic proppant and raw frac sand. Our manufacturing facilities also produce ceramic pellets for use in various industrial technology applications, including but not limited to, casting and milling. We also have begun plant trials at our manufacturing facilities to produce products other than base ceramic proppant. Those mineral processing plant trials have proven successful and have led to increased revenue generation. Through our wholly-owned subsidiary StrataGen, Inc., we promote increased operators’ production and EUR by providing one of the industry’s most widely used hydraulic fracture simulation software under the brand FracPro, as well as hydraulic fracture design and consulting services under the brand StrataGen. Our Environmental Products and Services segment, through AGPI, a wholly-owned subsidiary of ours, uses proprietary technology to provide products that are designed to enable its clients to extend the life of their storage assets, reduce the potential for hydrocarbon spills and provide containment of stored materials. This business is intended to protect operators’ assets, minimize environmental risk, and lower LOE. Our products and services help oil and gas producers increase production and recovery rates from their wells, thereby lowering overall finding and development costs. As a result, our business is dependent to a large extent on the level of drilling and hydraulic fracturing activity in the oil and gas industry worldwide. Although our ceramic proppants are more expensive than alternative non- ceramic proppants, we have been able to demonstrate the cost-effectiveness of our products to numerous operators of oil and gas wells by marketing our technical expertise. We believe our future prospects benefit from both an increase in drilling and hydraulic fracturing activity worldwide and the desire of industry participants to improve production results and lower their overall development costs. Our ceramic media for use in various industrial technology applications improve the quality of end products and industrial processes primarily in the casting and milling markets. We believe growth in our industrial business will in part benefit from recent changes in the regulatory environment, a corresponding conversion to ceramic media, and our expanded product portfolio. m International revenues represented 21%, 34% and 29% of total revenues in 2017, 2016 and 2015, respectively. Operating profit margin for our ceramic proppant business is principally impacted by sales volume, product mix, sales price, distribution costs, manufacturing costs, including natural gas, and our production levels as a percentage of our capacity. The level of selling, general and administrative spending, as well as other operating expenses, can also impact operating profit margins. As a result of the depressed commodity price for oil during 2017, there has been a negative impact on industry activity levels which has in turn negatively impacted the demand for ceramic proppant, so we continue to focus on cash preservation and cost reduction strategies. Beginning in 2015, we slowed and idled proppant production to assist in managing cash and inventory levels. We mothballed our proppant facility in Millen, Georgia and McIntyre, Georgia and shut down our facility in Luoyang, China However, we are now utilizing our McIntyre, Georgia facility only in a limited capacity primarily to supply the industrial market. These events resulted in significant negative impact to the financial results of our operations. Additionally, we suspended completion of two large construction projects. We suspended completion of the second production line at Millen, Georgia indefinitely, and we are exploring ways to monetize these assets. We also suspended completion of the second phase of the retrofit of our Eufaula, Alabama plant with our new KRYPTOSPHERE® technology until such time that market conditions improves enough to warrant completion. During the three months ended September 30, 2017, we recorded an impairment on the Millen, Georgia facility. As of December 31, 2017, the value of the projects relating to these two assets totaled approximately 85% of the Company’s total construction in progress and we estimate that both projects are over 90% complete. See “Item 1 - Business” and “Item 1A - Risk Factors”. d Although most direct manufacturing expenses have been relatively stable or predictable over time, we have experienced volatility tt in the cost of natural gas, which is used in production by our manufacturing facilities. The cost of natural gas has been a significant component of total monthly direct production expense. In recent years, the price of natural gas has been low compared to historical 20 prices, as well as fairly stable from period to period. However, in an effort to mitigate volatility in the cost of natural gas purchases and reduce exposure to short term spikes in the price of this commodity, we contract in advance for portions of our future natural gas requirements. Our gas contract commitments can extend several years into the future. Despite the efforts to reduce exposure to changes in natural gas prices, it is possible that, given the significant portion of manufacturing costs represented by this item, gross margins as a percentage of sales may decline and changes in revenue may not directly correlate to changes in net income. Due to the severe decline in industry activity beginning in early 2015, we significantly reduced production levels and consequently did not take delivery of all of the contracted natural gas quantities. As a result, we have accounted for the relevant contracts as derivative instruments. f General Business Conditions Our Oilfield Technologies and Services segment is impacted by the number of natural gas and oil wells drilled in North America, and the need to hydraulically fracture these wells. In markets outside North America, sales of our products are also influenced by the overall level of drilling and hydraulic fracturing activity. Furthermore, because the decision to use ceramic proppant is based on comparing the higher initial costs to the future value derived from increased production and recovery rates, our business is influenced by the current and expected prices of natural gas and oil. Beginning in late 2014, a severe decline in oil and continued decline in natural gas prices led to a significant decline in oil and natural gas industry drilling activities and capital spending. During 2017, however, the average price of West Texas Intermediate (“WTI”) crude oil rose 18% to $50.88 per barrel compared to $43.14 per barrel in 2016. The average North American rig count also rose 69% in 2017 to 1,081 rigs compared to 640 rigs in 2016. Despite these improvements, E&P operators continued to use lowest- cost completions, a trend that we expect to continue in 2018, as our customers remain under pressure to consider lower cost alternatives, notwithstanding the superior performance results of our products. These events, along with an oversupplied ceramic proppant market and depressed oil and natural gas prices, kept demand and average prices low for our proppants. Current demand for proppant is extremely dynamic. In addition to rig counts and commodity prices, our results of operations are also significantly affected by a host of other factors, including but not limited to (a) completion activity, which is not necessarily correlated with rig count, (b) customer preferences, (c) new product and technology adoption, (d) imports and competition, (e) changes in the product mix of what we sell, (f) costs of developing our products and services and running our business, and (g) changes in our strategy and execution. Beginning early in 2015, we implemented a number of initiatives to preserve cash and lower costs, including: (1) reducing workforce across our organization, (2) lowering our production output levels in order to align with lower demand, including through idling and mothballing of some of our production facilities (3) limiting capital expenditures and (4) eliminating dividends. In 2016, we idled the majority of the production activities at our New Iberia, Louisiana plant until such time as market conditions warrant bringing them back online. Our facility in Millen, Georgia remains idled due to market conditions. However, in late 2016 we recommenced processing at our Marshfield, Wisconsin sand processing facility. Our remaining plants remain at reduced output levels. As a result of operating some of our plants below their normal production capacity, we expensed $40.7 million of production overhead costs in excess of amounts that would have been allocated to each unit of production at normal production levels. We continue to rationalize headcount as needed. During the third quarter of 2017, we closed on the sale of our Russian proppant business and received gross proceeds of $22.0 million. We expect to receive additional proceeds on the sale of approximately $4.0 million related to net debt and net working capital purchase price adjustments. Although we remain in active discussions with the buyer regarding the purchase price adjustments, in January 2018, we filed a Notice of Arbitration related to this purchase price adjustment against the buyer. Loss on the sale was $26.7 million, which included the reclassification of $33.3 million of foreign currency cumulative translation loss from shareholders’ equity and approximately $1.6 million expenses related to the sale. Net assets included in the calculation of the loss on the sale were $17.8 million. The Company’s Environmental Products and Services segment is also impacted by the global drilling and hydraulic fracturing activity, and has been negatively impacted by the significant decline in oil and natural gas industry drilling activities and capital spending. Critical Accounting Policies Our Consolidated Financial Statements are prepared in accordance with accounting principles generally accepted in the U.S., which require us to make estimates and assumptions (see Note 1 to the Consolidated Financial Statements). We believe that, of our significant accounting policies, the following may involve a higher degree of judgment and complexity. 21 Revenue is recognized when title passes to the customer (generally upon delivery of products) or at the time services are performed. We generate a significant portion of our revenues and corresponding accounts receivable from sales to the petroleum pressure pumping industry. In addition, we generate a significant portion of our revenues and corresponding accounts receivable from sales to two major customers, both of which are in the petroleum pressure pumping industry. As of December 31, 2017, approximately 26% of the balance in trade accounts receivable was attributable to those two customers. We record an allowance for doubtful accounts based on our assessment of collectability risk and periodically evaluate the allowance based on a review of trade accounts receivable. Trade accounts receivable are periodically reviewed for collectability based on customers’ past credit history and current financial condition, and the allowance is adjusted, if necessary. If the economic downturn in the petroleum pressure pumping industry worsens or does not materially improve or, for some other reason, any of our primary customers were to experience significant adverse conditions, our estimates of the recoverability of accounts receivable could be reduced by a material amount and the allowance for doubtful accounts could be increased by a material amount. As of December 31, 2017, the allowance for doubtfulff accounts totaled $1.6 million. tt We value inventory using the weighted average cost method. Assessing the ultimate realization of inventories requires judgments about future demand and market conditions. We regularly review inventories to determine if the carrying value of the inventory exceeds market value and we record an adjustment to reduce the carrying value to market value, as necessary. Future changes in demand and market conditions could cause us to be exposed to additional obsolescence or slow moving inventory. If actual market conditions are less favorable than those projected by management, lower of cost or market adjustments may be required. There was no lower of cost or market inventory adjustment for the year ended December 31, 2017. We recorded a $1.5 million lower of cost or market inventory adjustment for the year ended December 31, 2016. Income taxes are provided for in accordance with ASC Topic 740, “Income Taxes”. This standard takes into account the differences between financial statement treatment and tax treatment of certain transactions. Deferred tax assets (“DTAs”) and liabilities (“DTLs”) are recognized for the future tax consequences attributable to differences between the financial statement carrying value of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates is recognized as income or expense in the period that includes the enactment date. This calculation requires us to make certain estimates about our future operations. Changes in state, federal and foreign tax laws, as well as changes in the Company’s financial condition, could affect these estimates. t Accounting Standards Codification (“ASC”) Topic 740, Income Taxes, provides the carrying value of DTAs should be reduced by the amount not expected to be realized. A company should reduce deferred tax assets by a valuation allowance if, based on thet weight of all available evidence, it is no longer more likely than not that some portion or all of the deferred tax assets will be realized. The valuation allowance should be sufficient to reduce the deferred tax asset to the amount that is more likely than not to be realized. ASC 740 requires all available evidence, both positive and negative, be considered to determine whether a valuation allowance for deferred tax assets is needed in the financial statements. Additionally there can be statutory limitations and losses also assessed on the deferred tax assets should certain conditions arise. As a result of the significant decline in oil and gas activities and net losses incurred over the past several quarters, we determined during the year ending December 31, 2017 that it was more likely than not that a portion of our deferred tax assets will not be realized in the future. Accordingly, we established a $52.7 million valuation allowance against our deferred tax assets. Our assessment of the realizability of our deferred tax assets is based on the weight of all available evidence, both positive and negative, including future reversals of deferred tax liabilities. Income tax benefit was $2.0 million, or 0.8% of pretax loss, for the year ending December 31, 2017 compared to income tax benefit of $51.1 million, or 38.9% of pretax loss, for the same period in 2016. The decrease was primarily due to the valuation allowance recorded against our deferred tax assets. Long-lived assets, which include net property, plant and equipment, goodwill, intangibles and other long-term assets, comprise a significant amount of the Company’s total assets. The Company makes judgments and estimates in conjunction with the carrying values of these assets, including amounts to be capitalized, depreciation and amortization methods and useful lives. Additionally, the carrying values of these assets are periodically reviewed for impairment or whenever events or changes in circumstances indicate that the carrying amounts may not be recoverable. An impairment loss is recorded in the period in which it is determined that the carrying amount is not recoverable. This requires the Company to make long-term forecasts of its future revenues and costs related to the assets subject to review. These forecasts require assumptions about demand for the Company’s products and services, future market conditions and technological developments. Significant and unanticipated changes to these assumptions could require a provision for impairment in a future period. rr t As of September 30, 2017, the Company concluded that the Company’s Toomsboro and Millen, Georgia facilities should no longer be evaluated together as a group of assets because the facilities are no longer interchangeable and will no longer manufacture like products. As a result of the sustained and long-term shift away from base ceramic proppant to less expensive frac sand, the ff 22 Company has made a strategic decision to focus on growing technology, industrial and mineral processing revenue streams. Our Toomsboro, Georgia plant is being repurposed to produce technology and industrial products, as well as for use in toll processing of minerals. Our Millen, Georgia facility is currently only able to produce base ceramic proppants, but given our current long-term outlook on base ceramic proppant demand, we do not expect to utilize this plant to produce base ceramic proppant. We are currently evaluating opportunities to monetize our assets at our Millen facility. As a result, we evaluated the Toomsboro and Millen, Georgia plants separately for indicators of impairment during the third quarter of 2017. Given the change in the asset groupings of the two facilities and lack of estimated future cash flows associated with the base ceramic production at the Millen, Georgia facility, the Company identified indicators of impairment at the Millen, Georgia facility as of September 30, 2017. The Company determined that the projected cash flows attributable to our Millen, Georgia facility did not exceed the carrying value of the assets; therefore the Company concluded there was an impairment at that facility. The Company engaged the services of a third party consulting firm to assist with the determination of the fair value of the related assets and concluded that the assets were impaired. The key assumptions and inputs impacting the fair value include third party commentaryrr with respect to the property and equipment at our Millen, Georgia facility. For machinery and equipment and construction in progress, we used a cost approach to estimate the valuation. We applied a 65 percent downward adjustment to calculated replacement cost based on an analysis of construction documents and historical expenditures to remove non-saleable soft costs such as engineering and installation that would have no value to a market participant. Based on discussions with market participants, a salvage value multiplier ranging from 12 percent to 50 percent of the remaining replacement cost basis was applied to arrive at the estimated fair value for the machinery and equipment and construction in progress subject to impairment. For real property, the value of comparable property ranged from approximately $30 to $40 per square foot, and the concluded value of the property at the Millen, Georgia facility was approximately $35 per square foot. We applied a 94% downward adjustment to the calculated value from a cost approach for the buildings and site improvements as a representation of economic obsolescence. As a result, during the three months ended September 30, 2017, we recognized a $125.8 million impairment of long-lived assets, primarily relating to machinery and equipment and construction in progress. As of December 31, 2017, the remaining carrying value of the impaired assets at the Millen facility was approximately $18.5 million. d ff As of December 31, 2017, there were no indicators of additional impairment. We continue to monitor whether or not events or circumstances would indicate that the carrying value of any of our long-lived assets might not be recoverable. At December 31, 2016, as a result of the continued severity of the market downturn, the Company identified indicators of impairments related to each of its domestic manufacturing plant asset groups. The Company completed undiscounted cash flow analyses on that date and determined no impairment charge was necessary at that time. During the year ended December 31, 2015, as a result of worsening conditions in the oil and natural gas industry during the fourth quarter of 2015, we recorded a $43.7 million impairment of long-lived assets, primarily relating to machinery and equipment at our McIntyre, Georgia manufacturing plant and our Marshfield, Wisconsin sand processing facility. As of December 31, 2017, the remaining carrying value of machinery and equipment relating to those previously impaired facilities was approximately $3.1 million. d We account for certain natural gas contracts as derivative instruments, which requires us to recognize the gas contracts as either assets or liabilities at fair value with an offsetting entry in earnings. We use the income approach in determining the fair value of our derivative instruments. The model used considers the difference, as of each balance sheet date, between the contracted prices and the New York Mercantile Exchange (“NYMEX”) forward strip price for each contracted period. The estimated cash flows from these contracts are discounted using a discount rate of 8.0%, which reflects the nature of the contracts as well as the timing and risk of estimated cash flows associated with the contracts. The discount rate had an immaterial impact on the fair value of the contracts for the year ended December 31, 2017. The last natural gas contract will expire in December 2018. During the year ended December 31, 2017 and 2016, we recognized a loss on derivative instruments of $0.9 million and a gain on derivative instruments of $1.9 million, respectively, in cost of sales. As of December 31, 2017, gas contracts covering 1,680,000 MMBtu are subject to accounting as derivative instruments. Future decreases in the NYMEX forward strip prices will result in additional derivative losses while future increases in the NYMEX forward strip prices will result in derivative gains. Future gains or losses will approximate the change in NYMEX natural gas prices relative to the total quantity of natural gas under contracts subject to accounting as derivatives. ff t Low production levels triggered the component of our inventory accounting policy relating to operating at production levels below normal capacity. To determine the amount of production costs that we expense during each period, the Company allocates fixed production overheads to the costs of conversion based on the normal capacity of each production facility, generally considered to be 65% of a facility's stated capacity or higher. When a production facility operates at normal capacity, all of its fixed production overheads are allocated to costs of conversion of each product manufactured, based on the actual level of production. This determination is made facility-by-facility on a monthly basis in order to calculate the initial measurement value to recognize as cost of goods produced in a month by a given facility. 23 When a facility's total production in a month drops below 65% of its normal capacity, it is considered to be operating at an abnormally low production level. In such cases, each unit of production receives an allocation of fixed overheads in the amount that would have been allocated at the lower-end of normal capacity. The remaining unallocated excess fixed overhead cost for the facility is recognized as expense in the period and classified as Cost of Sales. Materials are the only variable component of production. Plant labor and all other overhead costs incurred in the production of the Company's products are either semi-fixed or fixed in nature, therefore all are included in the monthly evaluation of costs allocable to costs of conversion at normal capacity. The Company maintains a rate for each production facility that represents the maximum fixed production overhead cost per unit of production allocable to costs of conversion. The rates are based on an analysis of a recent historical period considered representative of a normal operating environment in which the facility operated at normal capacity. The maximum rate is calculated by recasting the fixed production overhead cost per unit of production on a pro forma basis as if the facility had operated at the lower- end threshold of its range of normal capacity, generally 65% of stated capacity. The current rates are based on 2014 as the representative year. Implied in this method is the assumption that 2014 production costs relative to sales prices yield a normal profit margin. A significant, permanent deterioration in the average selling prices of the Company’s products could result in a significant lowering of the rates, thereby increasing the periodic charge. The most recent period in which normal capacity was achieved was the year-ended December 31, 2014. Results of Operations Net Loss ($ in thousands) NNet Loss.................................................................................. $ (253,116) 2017 Percent Change (216)% $ 2016 (80,127) Percent Change 2015 27% $ (109,544) For the year ended December 31, 2017, we reported net loss of $253.1 million, which was 216% larger than the $80.1 million net loss reported in the previous year. Net loss in 2017 was driven by a $125.8 million loss on disposal or impairment of assets and a $26.7 million loss on the sale of our Russian proppant business. Excluding the impact of income taxes, the loss on disposal or impairment of assets, and the loss on the sale of our Russian proppant business, net loss in 2017 improved by $29.5 million, or 22%, primarily due to a 69% increase in the North American rig count which resulted in higher ceramic proppant sales volumes, including an increase in technology sales volumes. In addition, slowing and idling costs were reduced by $6.7 million, and severance costs were $6.1 million lower as compared to 2016. For the year ended December 31, 2016, there was also a $1.5 million railcar lease termination fee and $1.5 million lower of cost or market inventory adjustment , neither of which reoccurred in 2017. r For the year ended December 31, 2016, we reported net loss of $80.1 million, a decrease of 27% compared to the $109.5 million net loss reported in the previous year. Operations in 2016 continued to be negatively impacted by the severe decline in the oil and natural gas industry. Net loss in 2016 was impacted by a 45% reduction in the North American rig count which resulted in lower ceramic proppant sales volumes, a decrease in the average selling price of ceramic proppant, and $47.3 million in production costs expensed as a result of low production levels and idled and mothballed facilities. Further impacting net loss were $6.4 million in severance costs, $1.5 million of lower of cost or market inventory adjustments, and a $1.5 million railcar lease termination fee. Net loss was partially offset by actions taken throughout 2016 to reduce our cost base and a $1.9 million gain on natural gas derivative instruments. Individual components of financial results by reportable operating segment are discussed below. Revenues ($ in thousands) Consolidated revenues............................................................ $ 188,756 Revenues by operating segment: Oilfield Technologies and Services...................................... $ 165,557 23,199 Environmental Products and Services.................................. $ 2017 Percent Change 2016 Percent Change 2015 83% $ 103,051 (63)% $ 279,574 85% $ 69% $ 89,351 13,700 (65)% $ 257,373 22,201 (38)% $ Oilfield Technologies and Services segment revenues of $165.6 million for the year ended December 31, 2017 increased 85% compared to $89.4 million in 2016. The increase was mainly attributable to an increase in ceramic technology product sales and and 24 increase in frac sand sales. These increases were largely attributable to a 69% increase in the North American rig count and an 18% increase in oil prices. a Oilfield Technologies and Services segment revenues of $89.4 million for the year ended December 31, 2016 decreased 65% compared to $257.4 million in 2015. The decrease was mainly attributable to a decrease in proppant sales volumes, in conjunction with market-driven declines in the average selling prices of proppant, both which are presented in the table below. The decline in ceramic sales volume was largely attributable to a 45% reduction in the North American rig count and depressed oil prices and thet resulting negative impact on industry activity levels, along with E&P operators continuing to use a higher percentage of raw frac sand as an alternative to proppant due to its lower cost. Worldwide proppant sales volumes were as follows. Product Sales Volumes (Volumes in million pounds) 2017 For the years ended December 31, 2016 2015 Ceramic......................................................................... Resin Coated Sand........................................................ Northern White Sand .................................................... Total.............................................................................. 389 — 2,190 2,579 Volumes Price / lb 0.27 $ — 0.02 0.06 Volumes 356 — 311 667 Price / lb 0.22 $ — 0.02 0.13 Volumes 818 19 819 1,656 $ Price / lb $ 0.27 0.19 0.03 0.15 North American (defined as Canada and the U.S.) ceramic proppant sales volume increased 25% in 2017 compared to 2016. International (excluding Canada) ceramic proppant sales volume decreased 13% in 2017 compared to 2016, primarily due to decreases in Russia. North American (defined as Canada and the U.S.) ceramic proppant sales volume decreased 67% in 2016 compared to 2015. International (excluding Canada) ceramic proppant sales volume decreased 19% in 2016 compared to 2015, primarily due to decreases in Europe, Latin America, and China, partially offset by an increase in Russia. All of our Northern White Sand sales are in North America. Environmental Products and Services segment revenues of $23.2 million for the year ended December 31, 2017 increased 69% compared to $13.7 million in 2016. These increases were mainly attributable to a strengthening commodity price environment and the resulting positive impact on industry activity levels. Environmental Products and Services segment revenues of $13.7 million for the year ended December 31, 2016 decreased 38% compared to $22.2 million in 2015. The decrease was mainly attributable to the depressed commodity price environment and the resulting negative impact on industry activity levels. d ff Gross (Loss) Profit 2017 ($ in thousands) Consolidated gross loss ......................................................... $ (53,325) Consolidated as a % of revenues ........................................... Gross (loss) profit by operating segment: Oilfield Technologies and Services..................................... $ (56,397) Oilfield Technologies and Services % ................................ Environmental Products and Services ................................. $ Environmental Products and Services %............................. 3,072 (34)% 13% (28)% Percent Change 2016 Percent Change 2015 37% $ (85,014) (51)% $ (56,125) (82)% (20)% 34% $ (84,866) (44)% $ (58,801) (95)% (23)% 2176% $ (148) (106)% $ 2,676 (1)% 12% Our cost of sales related to our Oilfield Technologies and Services segment consists of manufacturing costs, packaging and transportation expenses associated with the delivery of our products to our customers and handling costs related to maintaining finished goods inventory and operating our remote stocking facilities. Variable manufacturing costs include raw materials, while labor, utilities and repair and maintenance supplies are semi-fixed. Fixed manufacturing costs include depreciation, property taxes on production facilities, insurance and factory overhead. Oilfield Technologies and Services segment gross loss for the year ended December 31, 2017 was $56.4 million, or (34)% of revenues, compared to gross loss of $84.9 million, or (95)% of revenues, for 2016. The improvement in gross loss in 2017 was primarily attributable to the strengthening commodity price environment and the resulting positive impact on industry activity levels. Improved gross loss was further impacted by lower slowing and idling production costs, lower severance and other charges, and a 25 railcar lease termination fee and inventory adjustment in 2016 that did not reoccur in 2017. We expect to incur slowing and idling production costs in the future until our production levels return to normal capacity. Oilfield Technologies and Services segment gross loss for the year ended December 31, 2016 was $84.9 million, or (95)% of revenues, compared to gross loss of $58.8 million, or (23)% of revenues, for 2015. Gross loss in 2016 was primarily the result of a 56% decline in worldwide ceramic proppant sales volumes and a decrease in the average selling price of ceramic proppant, resulting in a 65% decrease in revenues. Also negatively affecting gross loss during 2016 was $47.3 million in production costs that were not offset by increases in revenue, as a result of low production levels and idled and mothballed facilities. Gross loss was further impacted by $6.2 million in severance costs, a $1.5 million lower of cost or market inventory adjustment, and a $1.5 million railcar lease termination fee to preserve cash in future years for unused railcars. Gross loss was partially offset by a $1.9 million gain on natural gas derivative instruments. Environmental Products and Services segment gross profit for the year ended December 31, 2017 was $3.1 million, or 13% of revenues, compared to gross loss of $0.1 million, or (1)% of revenues, for 2016. This increase in gross profit were primarily the result of the strengthening commodity price environment and the resulting positive impact on industry activity levels. Environmental Products and Services segment gross loss for the year ended December 31, 2016 was $0.1 million, or (1)% of revenues, compared to gross profit of $2.7 million, or 12% of revenues, for 2015. This decrease in gross profit were primarily the result of the depressed commodity price environment and the resulting negative impact on industry activity levels. Consolidated cost of sales for the years ended December 31, 2017, 2016 and 2015 included the following: (In thousands) Primary cost of sales ................................................................ $ Slowing and idling production................................................. Loss (gain) on derivative instruments...................................... Railcar lease termination fee.................................................... Lower of cost or market inventory adjustment ........................ Severance and other charges.................................................... Total Cost of Sales ................................................................... $ 2017 2016 2015 200,213 $ 40,664 917 — — 287 242,081 $ 133,431 $ 47,318 (1,886) 1,500 1,515 6,187 188,065 $ Selling, General & Administrative (SG&A) and Other Operating Expenses 2017 42,533 ($ in thousands) Consolidated SG&A and start-up........................................... $ Consolidated as a % of revenues............................................ Consolidated loss on disposal or impairment of assets .......... $ 125,778 Loss on sale of Russian proppant business ............................ $ 26,747 SG&A and start-up by operating segments: Oilfield Technologies and Services...................................... $ Oilfield Technologies and Services % ................................. Environmental Products and Services.................................. $ Environmental Products and Services % ............................. 39,403 3,130 24% 13% 23% Percent Change 6% $ 2016 39,999 Percent Change (37)% $ 14048% $ $ 39% 889 — (98)% $ $ 44,111 — 7% $ 36,908 (36)% $ 57,738 41% 22% 1% $ 3,091 (41)% $ 5,258 23% 24% Oilfield Technologies and Services segment SG&A was $39.4 million for the year ended December 31, 2017 compared to $36.9 million for 2016. The increase in SG&A expenses primarily resulted from an increase in sales and marketing expenses to support the growth of this segment. Consolidated loss on disposal or impairment of assets in 2017 consisted of a $125.8 million impairment of our Millen, Georgia proppant manufacturing facility. Consolidated loss on sale of Russian proppant business of $26.7 million was related to the sale of our Russian proppant business. As a percentage of revenues, Oilfield Technologies and Services segment SG&A expenses for 2017 decreased to 24% compared to 41% in 2016, primarily due to the increase in revenues. t t Oilfield Technologies and Services segment SG&A and start-up expenses was $36.9 million for the year ended December 31, 2016 compared to $57.7 million for 2015. The decrease in SG&A expenses primarily resulted from actions we took during 2015 to reduce our cost base and preserve cash in light of the severe decline in the oil and natural gas industry. These savings were partially offset by $0.2 million in SG&A related severance costs in 2016. Consolidated loss on disposal or impairment of assets in 2016 consisted of $1.1 million impairment of the long-term portion of bauxite raw materials partially offset by $0.2 million gain on disposal 26 274,554 33,724 15,040 — 4,546 7,835 335,699 2015 62,996 23% of assets. As a percentage of revenues, Oilfield Technologies and Services segment SG&A and start-up expenses for 2016 increased to 41% compared to 22% in 2015, primarily due to the decrease in revenues. Environmental Products and Services segment SG&A of $3.1 million for the year ended December 31, 2017 was flat compared to 2016. Environmental Products and Services segment SG&A of $3.1 million for the year ended December 31, 2016 decreased 41% compared to $5.3 million in 2015. This decrease was primarily the result of actions we took, beginning in 2015, to reduce our cost base and preserve cash in light of the severe decline in the oil and natural gas industry. Income Tax Benefit ($ in thousands) Income Tax Benefit................................................................ $ Effective Income Tax Rate .................................................... 2017 (2,027) 0.8% Percent Change (96)% $ Percent Change (6)% $ 2016 (51,081) 38.9% 2015 (54,205) 33.1% Income taxes are not allocated between our operating segments. Consolidated income tax benefit was $2.0 million, or 0.8% of pretax loss, for the year ended December 31, 2017 compared to $51.1 million, or 38.9% of pretax loss for 2016 and $54.2 million, or 33.1% of pretax loss for 2015. Net operating losses generated in 2015 were carried back to 2013 and 2014. Net operating losses generated in 2016 and 2017 are carried forward, a portion of which are reserved by a valuation allowance in 2017. As a result of the net operating loss in 2015, we lost the benefit of our Section 199 manufacturing deduction, which negatively impacted the effective tax rate for 2015. In 2016, the effective tax rate increased as it normalized and due to a change in election for certain foreign tax credits. In 2017, the effective tax rate was significantly lower due to the application of the valuation allowance. Outlook A key goal in 2018 is continued progress on our transformation strategy to diversify revenue streams. It is our belief that execution on this transformation strategy will result in profitable growth and positive cash from operating activities. Although we expect that weather will impact the first half of 2018, we believe our revenue and operating cash will show improvement in the first half of 2018 compared to the first half of 2017. We believe revenues will grow in 2018. We expect revenues from both of our operating segments should follow industry activity. Within both segments, we believe revenue from industrial markets should see strong double-digit growth year over year. If the recent strengthening in oil price continues in 2018, we believe base ceramic demand could improve in 2018. In addition, based on early indications from clients, we believe ceramic technology sales will increase in our KRYPTOSPHERE and GUARD family of products. We anticipate KRYPTOSPHERE HD sales will be down slightly in 2018 due to a decrease in Gulf of Mexico activity, while KRYPTOSPHERE LD sales should exhibit steady growth globally. SCALEGUARD, a scale-inhibiting production assurance product, continues to be successful due to its ability to prevent scale buildup and lower lease operating expense for E&P operators. The pipeline of opportunities is promising and we have been awarded additional work in 2018 for a customer’s Permian basin wells, which should result in increased revenues compared to 2017. r Regarding our sand business, first sales for our North East project began in January. We will continue to utilize various business models, including an ‘asset-lite’ model like this, to serve client demand. We achieved steady growth in our industrial ceramics business during 2017, and we believe we will, while we continue to seek opportunities to monetize other businesses, continue to grow this business significantly in 2018 and well into the foreseeable future. It is important that we continue to expand in the markets we serve today as well as develop new markets and continue to develop new products specifically designed for industrial markets. We expect to add additional resources in 2018 to meet our objectives to grow this business by strong double digits again in 2018. We expect to develop additional contract manufacturing opportunities in mineral processing during 2018 for our underutilized manufacturing plants. Recently, we signed a multi-year agreement to toll process an agricultural product. Our Environmental Products and Services segment bounced back from the weather impacts of the third quarter of 2017. Given that the results in this segment tend to correlate to results in the Oil and Gas sector, we believe it should also follow industry activity in 2018. In addition, we are targeting revenue streams in the Industrial sector and expect strong year-over-year growth in those sales. 27 We believe growth of industrial ceramic and technology sales, broader sources of revenue, an improving commodity price environment and a corresponding increase in industry activity will improve our results of operations in 2018. This view, including increased demand for our products, is based on changing industry conditions and interactions with our customers. Despite our outlook for an improved operating environment in 2018, we have found generating accurate financial forecasts in the industry downturn has been difficult. o In addition, we continue to explore certain asset monetization opportunities to further strengthen the balance sheet. Liquidity and Capital Resources At December 31, 2017, we had cash and cash equivalents and restricted cash of $78.4 million compared to cash and cash equivalents and restricted cash of $91.7 million at December 31, 2016. During the year ended December 31, 2017, we received net proceeds of $21.2 million relating to the sale of our Russian proppant business, and net cash provided by financing activities was $6.3 million. Uses of cash included $38.8 million in operating activities and $2.2 million for capital expenditures. There were no major capital spending projects in 2017. Capital spending in 2017 primarily related to various plant maintenance as well as equipment purchases for our consulting and environmental businesses. We estimate our total capital expenditures in 2018 will be less than $5.0 million. Due to market conditions, the completion of the second line at the manufacturing facility in Millen, Georgia and the second phase of a plant retrofit with new KRYPTOSPHERE® technology have been suspended until such time that market conditions warrant completion. Currently, we do not intend to complete the second line at the Millen, Georgia facility. The Company anticipates that cash on hand will be sufficient to meet planned operating expenses and other cash needs for the next 12 months from the date of this Form 10-K. The Company’s view regarding sufficiency of cash and liquidity is primarily based on our financial forecast for 2018, which is impacted by various assumptions regarding demand and sales prices for our products. Generally, we expect demand for our products and the sales prices to increase in 2018 compared to 2017. Although we have observed certain factors in the fourth quarter 2017 that support improving industry conditions, our financial forecasts are based on estimates of customer demand, which is highly volatile in the current operating environment, and we have no committed sales backlog with our customers. As a result, there is inherent uncertainty in our forecasts. rr Off-Balance Sheet Arrangements We had no off-balance sheet arrangements as of December 31, 2017. Contractual Obligations The following table summarizes our contractual obligations as of December 31, 2017: ($ in thousands) Long-term debt obligations..................................................... $ Capital lease obligations ......................................................... Operating lease obligations: Less than 1 year Payments due in period 1 - 3 years 3 - 5 years More than 5 years $ — — $ 27,040 — $ 65,000 — — — Total 92,040 — - Primarily railroad equipment (net of subleases) ............. 94,627 11,404 28,511 30,052 24,660 Purchase obligations: - Natural gas contracts....................................................... - Raw materials contracts .................................................. Other long-term obligations.................................................... Total contractual obligations .................................................. $ 9,334 11,200 — 207,201 $ 9,334 5,600 — 26,338 $ — 5,600 — 61,151 $ — — — 95,052 $ — — — 24,660 See Note 3, Note 5, and Note 15 to the Notes to the Consolidated Financial Statements. Operating lease obligations relate primarily to railroad equipment leases and include leases of other property, plant and equipment. 28 We use natural gas to power our manufacturing plants. From time to time, we enter into contracts to purchase a portion of the anticipated natural gas requirements at specified prices. As of December 31, 2017, the last such contract was due to expire in December 2018. We have entered into contracts to supply raw materials, primarily kaolin, bauxite, slurry and various forms of sand, to our manufacturing plants. Four outstanding contracts do not require us to purchase minimum annual quantities, but do require the purchase of minimum annual percentages, ranging from 50% to 100% of the respective plants’ requirements for the specified raw Each of the contracts is materials. Three outstanding contract requires us to purchase a minimum annual quantity of frac sand. described in Note 15 to the Notes to the Consolidated Financial Statements. Item 7A. Quantitative and Qualitative Disclosures about Market Risk As of December 31, 2017, the Company does not have a material net investment that is subject to foreign currency fluctuations. As of December 31, 2017, we had a $65.0 million fully drawn term loan and a $27.0 million notes payable. Under the terms of the term loan agreement, the interest rate is set at 9.00% and terms of the notes payable, the interest rate is set at 7.00%. We do not believe that we have any material exposure to market risk associated with interest rates. We are subject to the risk of market price fluctuations of certain commodities, such as natural gas, and utilize forward purchase contracts to manage or reduce market risks relating to these costs. We do not enter into these transactions for speculative or trading purposes. As of December 31, 2017, we have contracted for a total of 1,800,000 MMBtu of natural gas at an average price of $4.40 per MMBtu through December 31, 2018. r Item 8. Financial Statements and Supplementary Data The information required by this Item is contained in pages F-3 through F-25 of this Report. Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure Not applicable. Item 9A. Controls and Procedures (a) Evaluation of Disclosure Controls and Procedures Disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports filed or submitted under the Securities Exchange Act of 1934 (the “Exchange Act”) is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in the reports filed under the Exchange Act is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure. As of December 31, 2017, management carried out an evaluation, under the supervision and with the participation of the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures. There are inherent limitations to the effectiveness of any system of disclosure controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurances of achieving their control objectives. Based upon and as of the date of that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures were effective to ensure that information required to be disclosed by the Company in the reports it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in thet SEC’s rules and forms, and to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure. mm (b) Management’s Report on Internal Control Over Financial Reporting For Management’s Report on Internal Control Over Financial Reporting, see page F-1 of this Report. 29 (c) Report of Independent Registered Public Accounting Firm For the Report of Independent Registered Public Accounting Firm on the Company’s internal control over financial reporting, see page F-2 of this Report. (d) Changes in Internal Control over Financial Reporting There were no changes in our internal control over financial reporting during the quarter ended December 31, 2017 that materially affected or are reasonably likely to materially affect, those controls. Item 9B. Other Information Not applicable. 30 PART III Certain information required by Part III is omitted from this Report. We will file a definitive proxy statement pursuant to Regulation 14A (the “Proxy Statement”) not later than 120 days after the end of the fiscal year covered by this Report and certain information included therein is incorporated herein by reference. Only those sections of the Proxy Statement that specifically address the items set forth herein are incorporated by reference. Such incorporation does not include the Compensation Committee Report rr included in the Proxy Statement. Item 10. Directors, Executive Officers and Corporate Governance Information concerning executive officers under Item 401 of Regulation S-K is set forth in Part I of this Form 10-K. The other information required by this Item is incorporated by reference to the portions of the Company’s Proxy Statement entitled “Security Ownership of Certain Beneficial Owners and Management,” “Election of Directors,” “Board of Directors, Committees of the Board of Directors and Meeting Attendance,” “Code of Business Conduct and Ethics,” “Section 16(a) Beneficial Ownership Reporting Compliance” and “Report of the Audit Committee.” Item 11. Executive Compensation The information required by this Item is incorporated by reference to the portions of the Company’s Proxy Statement entitled “Compensation of Executive Officers,” "Director Compensation" and "Potential Termination and Change in Control Payments." Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters The information required by this Item is incorporated by reference from our Proxy Statement under the captions “Securities Ownership of Certain Beneficial Owners and Management” and “Equity Compensation Plan Information.” Item 13. Certain Relationships and Related Transactions, and Director Independence The information required by this Item is incorporated by reference to the portion of our Proxy Statement entitled “Election of Directors.” Item 14. Principal Accounting Fees and Services The information required by this Item is incorporated by reference to the portion of our Proxy Statement entitled “Ratification of n Appointment of our Independent Registered Public Accounting Firm.” 31 Item 15. Exhibits, Financial Statement Schedules (a) Exhibits, Financial Statements and Financial Statement Schedules: 1. Consolidated Financial Statements PART IV The Consolidated Financial Statements of CARBO Ceramics Inc. listed below are contained in pages F-3 through F-25 of this Report: Report of Independent Registered Public Accounting Firm Consolidated Balance Sheets at December 31, 2017 and 2016 Consolidated Statements of Operations for each of the three years ended December 31, 2017, 2016 and 2015 Consolidated Statements of Comprehensive Loss for each of the three years ended December 31, 2017, 2016 and 2015 Consolidated Statements of Shareholders’ Equity for each of the three years ended December 31, 2017, 2016 and 2015 Consolidated Statements of Cash Flows for each of the three years ended December 31, 2017, 2016 and 2015 2. Consolidated Financial Statement Schedules All schedules have been omitted since they are either not required or not applicable. 3. Exhibits The exhibits listed on the accompanying Exhibit Index are filed as part of, or incorporated by reference into, this Report. Item 16. Form 10-K Summary None 32 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) under the Securities Exchange Act of 1934. The Company’s internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external reporting purposes in accordance with U.S. generally accepted accounting principles. 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, including our Chief Executive Officer and our Chief Financial Officer, assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2017. In making this assessment, it used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control–Integrated Framework (2013). Based on its assessment and those criteria, management has concluded that the Company maintained effective internal control over financial reporting as of December 31, 2017. The Company’s independent registered public accounting firm, Ernst & Young LLP, has issued an attestation report on the Company's internal control over financial reporting. That report is included herein. F-1 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Board of Directors and Shareholders of CARBO Ceramics Inc. Opinion on Internal Control over Financial Reporting We have audited CARBO Ceramic Inc.’s internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, CARBO Ceramics Inc. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on the COSO criteria. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets as of December 31, 2017 and 2016, the related consolidated statements of operations, comprehensive loss, shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2017, and the related notes of the Company and our report dated March 7, 2018 expressed an unqualified opinion thereon. Basis for Opinion The Company’s management is responsible 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 an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the 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 audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion. 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 (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company (2) 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 (3) 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. /S/ ERNST & YOUNG LLP New Orleans, Louisiana March 7, 2018 F-2 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Board of Directors and Shareholders of CARBO Ceramics Inc. Opinion on the Financial Statements We have audited the accompanying consolidated balance sheets of CARBO Ceramics Inc. (the Company) as of December 31, 2017 and 2016, the related consolidated statements of operations, comprehensive loss, shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2017, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017, in conformity with U.S. generally accepted accounting principles. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 7, 2018 expressed an unqualified opinion thereon. Basis for Opinion These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the 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 audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the 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 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 financial statements. We believe that our audits provide a reasonable basis for our opinion. /S/ ERNST & YOUNG LLP We have served as the Company’s auditor since 1987. New Orleans, Louisiana March 7, 2018 F-3 CARBO CERAMICS INC. CONSOLIDATED BALANCE SHEETS ($ in thousands, except per share data) December 31, 2017 2016 Current assets: ASSETS Cash and cash equivalents ................................................................................................................ Restricted cash .................................................................................................................................. Trade accounts and other receivables, net ........................................................................................ Inventories: $ Finished goods............................................................................................................................ Raw materials and supplies ........................................................................................................ Total inventories ................................................................................................................... Prepaid expenses and other current assets ........................................................................................ Prepaid income taxes ........................................................................................................................ Total current assets ..................................................................................................................... Restricted cash ........................................................................................................................................ Income tax receivable ............................................................................................................................. Property, plant and equipment: Land and land improvements............................................................................................................ Land-use and mineral rights ............................................................................................................. Buildings........................................................................................................................................... Machinery and equipment ................................................................................................................ Construction in progress ................................................................................................................... Total............................................................................................................................................ Less accumulated depreciation and amortization .............................................................................. Net property, plant and equipment .............................................................................................. Goodwill .................................................................................................................................................. Intangible and other assets, net ................................................................................................................ Total assets .................................................................................................................................. $ Current liabilities: LIABILITIES AND SHAREHOLDERS’ EQUITY Long-term debt, current portion ........................................................................................................ $ Accounts payable............................................................................................................................... Accrued payroll and benefits ............................................................................................................. Accrued freight .................................................................................................................................. Accrued utilities................................................................................................................................. Derivative instruments....................................................................................................................... Other accrued expenses ..................................................................................................................... Total current liabilities................................................................................................................. Deferred income taxes ............................................................................................................................. Long-term debt, net.................................................................................................................................. Notes payable, related parties .................................................................................................................. Other long-term liabilities........................................................................................................................ Shareholders’ equity: Preferred stock, par value $0.01 per share, 5,000 shares authorized, none outstanding ................... Common stock, par value $0.01 per share, 80,000,000 shares authorized; 27,133,614 and 26,881,066 shares issued and outstanding at December 31, 2017 and 2016, respectively ..................................................................................................................................... Additional paid-in capital .................................................................................................................. Retained earnings............................................................................................................................... Accumulated other comprehensive loss ............................................................................................ Total shareholders’ equity ........................................................................................................... Total liabilities and shareholders’ equity..................................................................................... $ See accompanying notes to consolidated financial statements. F-4 68,169 $ 6,935 37,705 59,519 19,480 78,999 3,989 — 195,797 3,281 2,389 41,590 19,696 72,427 455,863 36,138 625,714 301,528 324,186 3,500 11,445 540,598 $ — $ 19,417 6,056 2,292 1,552 2,537 10,577 42,431 230 60,698 27,040 4,434 — 271 125,715 279,779 — 405,765 540,598 $ 91,680 — 23,622 74,133 23,041 97,174 3,548 1,199 217,223 — — 45,530 19,696 87,318 647,753 92,704 893,001 398,898 494,103 3,500 8,631 723,457 13,000 7,782 3,434 593 1,169 1,599 7,227 34,804 1,236 42,404 25,000 3,443 — 269 117,192 533,435 (34,326) 616,570 723,457 CARBO CERAMICS INC. CONSOLIDATED STATEMENTS OF OPERATIONS ($ in thousands, except per share data) Revenues ............................................................................................................ $ Cost of sales ....................................................................................................... Gross loss ........................................................................................................... Selling, general and administrative expenses..................................................... Start-up costs ...................................................................................................... Loss on disposal or impairment of assets, net .................................................... Loss on sale of Russian proppant business ........................................................ Operating loss..................................................................................................... Other expense: Interest expense, net...................................................................................... Foreign currency exchange gain, net ............................................................ Other income (expense), net ......................................................................... Loss before income taxes ................................................................................... Income tax benefit .............................................................................................. Net loss............................................................................................................... $ Loss per share: 2017 Years ended December 31, 2016 2015 188,756 $ 242,081 (53,325) 42,533 — 125,778 26,747 (248,383) (7,700) 35 905 (6,760) (255,143) (2,027) (253,116) $ $ 103,051 188,065 (85,014) 39,984 15 889 — (125,902) (5,435) 119 10 (5,306) (131,208) (51,081) (80,127) $ 279,574 335,699 (56,125) 62,199 797 44,111 — (163,232) (470) 94 (141) (517) (163,749) (54,205) (109,544) Basic.............................................................................................................. $ Diluted .......................................................................................................... $ (9.49) $ (9.49) $ (3.29) $ (3.29) $ (4.76) (4.76) See accompanying notes to consolidated financial statements. F-5 CARBO CERAMICS INC. CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS ($ in thousands) Net loss............................................................................................................... $ Other comprehensive income (loss): Foreign currency translation adjustment....................................................... Reclassification of Russia cumulative translation loss to Net Loss upon sale ................................................................................................................ Reclassification of China cumulative translation gain to Net Loss upon substantial liquidation ................................................................................ Other comprehensive income (loss) ................................................................... Comprehensive loss............................................................................................ $ 2017 (253,116) $ Years ended December 31, 2016 (80,127) $ 2015 (109,544) 979 3,376 (5,880) 33,347 — — — 34,326 (218,790) $ — 3,376 (76,751) $ (8,853) (14,733) (124,277) See accompanying notes to consolidated financial statements. F-6 CARBO CERAMICS INC. CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY ($ in thousands, except per share data) Balances at January 1, 2015.................................................... Net loss.............................................................................. Foreign currency translation adjustment ........................... Reclassification of China cumulative translation gain to Net Loss upon substantial liquidation ............................ Comprehensive loss .......................................................... Tax expense from stock based compensation ................... Stock granted under restricted stock plan, net................... Stock based compensation ................................................ Shares surrendered by employees to pay taxes ................. Cash dividends ($0.63 per share) ...................................... Balances at December 31, 2015.............................................. $ Net loss.............................................................................. Foreign currency translation adjustment ........................... Comprehensive loss .......................................................... Cumulative effect of change in accounting policy............ Stock sold under ATM program ....................................... Stock granted under restricted stock plan, net................... Stock based compensation ................................................ Shares surrendered by employees to pay taxes ................. Balances at December 31, 2016.............................................. $ Net loss.............................................................................. Foreign currency translation adjustment ........................... Reclassification of Russia cumulative translation loss to Net Loss upon sale ......................................................... Comprehensive income ..................................................... Issuance of warrant............................................................ Stock granted under restricted stock plan, net................... Stock based compensation ................................................ Shares surrendered by employees to pay taxes ................. Balances at December 31, 2017.............................................. $ Common Stock Additional Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) 231 — — 59,297 — — 739,498 (109,544) — (22,969) — (5,880) — — — (8,853) — 2 — — — 233 $ — — — 34 2 — — 269 $ — — (1,768) 698 6,840 — — 65,067 $ — — — — — (580) (14,666) 614,708 $ (80,127) — 697 45,530 478 5,420 — 117,192 $ — — (697) — — — (449) 533,435 $ (253,116) — — — — — — (37,702) $ — 3,376 — — — — — (34,326) $ — 979 — — — 33,347 — 2 — — 271 $ 3,870 398 4,255 — 125,715 $ — — — (540) 279,779 $ — — — — — $ Total 776,057 (109,544) (5,880) (8,853) (124,277) (1,768) 700 6,840 (580) (14,666) 642,306 (80,127) 3,376 (76,751) — 45,564 480 5,420 (449) 616,570 (253,116) 979 33,347 (218,790) 3,870 400 4,255 (540) 405,765 See accompanying notes to consolidated financial statements. F-7 CARBO CERAMICS INC. CONSOLIDATED STATEMENTS OF CASH FLOWS ($ in thousands) Operating activities Net loss............................................................................................................... $ Adjustments to reconcile net loss to net cash (used in) provided by operating activities: Depreciation and amortization...................................................................... Provision for doubtful accounts.................................................................... Deferred income taxes .................................................................................. Lower of cost or market inventory adjustment............................................. Loss on disposal or impairment of assets ..................................................... Loss on sale of Russian proppant business................................................... Foreign currency transaction gain, net.......................................................... Stock compensation expense ........................................................................ PIK accrual on notes payable, related parties ............................................... Change in fair value of derivative instruments............................................. Changes in operating assets and liabilities: Trade accounts and other receivables...................................................... Inventories ............................................................................................... Prepaid expenses and other current assets............................................... Accounts payable .................................................................................... Accrued expenses .................................................................................... Other, net ................................................................................................. Income tax receivable, net....................................................................... Net cash (used in) provided by operating activities ........................................... Investing activities Capital expenditures ........................................................................................... Net proceeds from sale of Russian proppant business ....................................... Net cash provided by (used in) investing activities............................................ Financing activities Proceeds from long-term debt ............................................................................ Proceeds from issuance of common stock under ATM program....................... Repayments on long-term debt .......................................................................... Repayments on insurance financing agreement ................................................. Payment of debt issuance costs .......................................................................... Proceeds from notes payable, related parties ..................................................... Dividends paid.................................................................................................... Purchase of common stock................................................................................. Net cash provided by financing activities .......................................................... Effect of exchange rate changes on cash............................................................ Net (decrease) increase 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 year ............................ $ Supplemental cash flow information Interest paid ........................................................................................................ $ Income taxes paid............................................................................................... $ 2017 Years ended December 31, 2016 2015 (253,116) $ (80,127) $ (109,544) 45,337 589 (2,134) — 125,778 25,101 (35) 4,892 2,040 (930) (20,533) 10,524 724 11,666 8,687 2,949 (357) (38,818) (2,152) 21,154 19,002 12,349 — (3,250) (1,296) (989) — — (539) 6,275 246 (13,295) 91,680 78,385 $ 48,451 918 (50,535) 1,515 889 — (119) 5,939 — (7,687) 24,569 6,433 1,726 631 (8,405) 1,730 36,137 (17,935) (6,848) — (6,848) — 45,564 (32,099) (917) (339) 25,000 — (450) 36,759 838 12,814 78,866 91,680 $ 54,457 1,857 (56,800) 4,546 44,111 — (94) 7,547 — 11,155 81,371 27,022 1,437 (7,861) (9,104) 697 19,780 70,577 (62,747) — (62,747) 70,000 — (7,000) — — — (14,666) (580) 47,754 (1,016) 54,568 24,298 78,866 2,319 457 $ $ 5,269 — $ $ 2,613 — See accompanying notes to consolidated financial statements F-8 CARBO CERAMICS INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS ($ in thousands, except per share data) 1. Significant Accounting Policies Description of Business CARBO Ceramics Inc. (the “Company”) was formed in 1987 and is a manufacturer of ceramic proppants and also produces resin-coated ceramic proppants. The Company has production plants in: New Iberia, Louisiana; Eufaula, Alabama; McIntyre, Georgia; Toomsboro, Georgia; and Millen, Georgia; and a sand processing facility in Marshfield, Wisconsin. The Company predominantly sells its proppant products through pumping service companies that perform hydraulic fracturing for oil and gas companies. Finished goods inventories are stored at the plant sites and various domestic and international remote distribution facilities. The Company also provides one of the industry’s most widely used hydraulic fracture simulation software FracPro®, as well as hydraulic fracture design and consulting services. In addition, the Company provides a broad range of technologies for spill prevention, containment and countermeasures. Beginning in late 2014, a severe decline in oil and natural gas prices led to a significant decline in oil and natural gas industry drilling activities and capital spending. Beginning in 2015, the Company implemented a number of initiatives to preserve cash and lower costs, including: reducing workforce across the organization, lowering production output levels in order to align with lower demand, limiting capital expenditures and reducing dividends. The Company incurred severance costs of $287 and $6,426 during 2017 and 2016, respectively, as a result of these actions. Temporarily idled facilities are expected to remain closed for a short period of time, generally less than one year. Mothballed facilities are expected to remain closed for one year or longer. The accounting treatment is the same for both temporarily idled and mothballed facilities, except that mothballed assets are evaluated for possible impairment while temporarily idled assets are not necessarily assessed for impairment. The Company continues to depreciate both temporarily idled and mothballed assets. As of December 31, 2017, we are producing ceramic proppants predominantly from our Eufaula, Alabama manufacturing facility, and processing sand at our Marshfield, Wisconsin facility. We are currently producing ceramic pellets in a limited capacity at our McIntyre, Georgia facility. Our Millen, Georgia facility is currently mothballed and not expected to resume ceramic proppant production in the near future. We are currently using our Toomsboro, Georgia facility in a limited capacity to primarily process minerals for third parties. The Company continues to assess liquidity needs and manage cash flows and, if industry conditions do not improve and/or demand for its products does not otherwise increase, the Company would expect to temporarily idle all or a portion of our currently active facilities in the short term. As a result of the steps the Company has taken to enhance its liquidity, the Company currently believes that cash on hand will enable the Company to meet its working capital, capital expenditure, debt service and other funding requirements for at least one year from the date this Form 10-K is issued. The Company’s view regarding sufficiency of cash and liquidity is primarily based on our financial forecast for 2018, which is impacted by various assumptions regarding demand and sales prices for our products. Generally, we expect demand for our products and the sales prices to increase in 2018 compared to 2017, and this expectation is included within our 2018 financial forecast. Although we have observed certain factors in 2017 that support improving industry conditions, our financial forecasts in recent periods have proven less reliable given customer demand, which is highly volatile in the current operating environment and no committed sales backlog exists with our customers. As a result, there is no guarantee that our financial forecast, which projects sufficient cash will be available to meet planned operating expenses and other cash needs, will be accurate. d t Additionally, the Company suspended completion of two large construction projects. We suspended completion of the second production line at the Millen, Georgia facility indefinitely, and we are exploring way to monetize these assets. The second phase of the retrofit of our Eufaula, Alabama plant with the new KRYPTOSPHERE® technology has been suspended until such time that market conditions improve enough to warrant completion. During the three months ended September 30, 2017, we recorded a $125,759 impairment on the Millen, Georgia facility, which included an impairment of construction in progress of $50,170. As of December 31, 2017, the value of the assets relating to these two projects, after consideration of the impairment, totaled approximately 85% of the Company’s total construction in progress and both projects are over 90% complete. Principles of Consolidation The consolidated financial statements include the accounts of CARBO Ceramics Inc. and its operating subsidiaries. All significant intercompany transactions have been eliminated. F-9 Concentration of Credit Risk, Accounts Receivable and Other Receivables The Company performs periodic credit evaluations of its customers’ financial condition and generally does not require collateral. Receivables are generally due within 30 days. The majority of the Company’s receivables are from customers in the petroleum pressure pumping industry. The Company establishes an allowance for doubtful accounts based on its assessment of collectability risk and periodically evaluates the balance in the allowance based on a review of trade accounts receivable. Trade accounts receivable are periodically reviewed for collectability based on customers’ past credit history and current financial condition, and the allowance is adjusted if necessary. Credit losses historically have been insignificant. The allowance for doubtful accounts at December 31, 2017 and 2016 was $1,602 and $2,804, respectively. Other receivables were $546 and $650 as of December 31, 2017 and 2016, respectively, of which related mainly to miscellaneous receivables in the United States. Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The carrying amounts reported in the balance sheet for cash equivalents approximate fair value. Restricted Cash As a result of the repayment of the Wells Fargo term loan, combined with the continued use of letters of credit and corporate cards with Wells Fargo, a portion of the Company’s cash balance is now restricted to its use in order to provide collateral to Wells Fargo. As of December 31, 2017 and 2016, restricted cash was $10,216 and 0, respectively. Inventories Inventories are stated at the lower of cost (weighted average) or market. Finished goods inventories include costs of materials, plant labor and overhead incurred in the production of the Company’s products and costs to transfer finished goods to distribution centers. The Company evaluated the carrying values of its inventories and concluded that market prices had fallen below carrying costs for certain inventory. Consequently, the Company recognized $1,515 and $4,546 lower of cost or market adjustments in cost of sales in 2016 and 2015, respectively, to adjust finished goods and raw materials carrying values to the lower market prices. No adjustments were required in 2017. Property, Plant and Equipment Property, plant and equipment are stated at cost. Repair and maintenance costs are expensed as incurred. Depreciation is computed on the straight-line method for financial reporting purposes using the following estimated useful lives: Buildings and improvements....................................................... Machinery and equipment ........................................................... Land-use rights ............................................................................ 15 to 30 years 3 to 30 years 30 years The Company holds approximately 4,618 acres of land and leasehold interests containing kaolin reserves near its plants in Georgia and Alabama. The Company also holds approximately 113 acres of land and leasehold interests containing sand reserves near its sand processing facility in Marshfield, Wisconsin. The capitalized costs of land and mineral rights as well as costs incurred to develop such property are amortized using the units-of-production method based on estimated total tons of these reserves. rr Impairment of Long-Lived Assets and Intangible Assets Long-lived assets to be held and used and intangible assets that are subject to amortization are reviewed for impairment whenever events or circumstances indicate their carrying amounts might not be recoverable. Recoverability is assessed by comparing the undiscounted expected future cash flows from the assets with their carrying amount. If the carrying amount exceeds the sum of m the undiscounted future cash flows an impairment loss is recorded. The impairment loss is measured by comparing the fair value of the assets with their carrying amounts. Intangible assets that are not subject to amortization are tested for impairment at least annually by comparing their fair value with the carrying amount and recording an impairment loss for any excess of carrying amount over fair value. Fair values are generally determined based on discounted expected future cash flows or appraised values, as appropriate. For additional information on the Company’s long-lived assets and intangible assets impairment assessment, please refer to Note 4 - Impairment of Long-Lived Assets. F-10 Manufacturing Production Levels Below Normal Capacity As a result of the Company substantially reducing manufacturing production levels, including by idling and mothballing certain facilities, the component of the Company’s accounting policy for inventory relating to operating at production levels below normal capacity was triggered and resulted in certain production costs being expensed instead of being capitalized into inventory. The Company expenses fixed production overhead amounts in excess of amounts that would have been allocated to each unit of production at normal production levels. For the years ended December 31, 2017, 2016 and 2015 the Company expensed $40,664, $47,318 and $33,724, respectively, in production costs. r Capitalized Software The Company capitalizes certain software costs, after technological feasibility has been established, which are amortized utilizing the straight-line method over the economic lives of the related products, generally not to exceed five years. Goodwill Goodwill represents the excess of the cost of companies acquired over the fair value of their net assets at the date of acquisition. Goodwill relating to each of the Company’s reporting units is tested for impairment annually, during the fourth quarter, as well as when an event, or change in circumstances, indicates an impairment is more likely than not to have occurred. For additional information on the Company’s goodwill impairment assessment, please refer to Note 4 - Impairment of Long-Lived Assets. Revenue Recognition Revenue from proppant sales is recognized when title passes to the customer, generally upon delivery. Revenue from consulting and geotechnical services is recognized at the time service is performed. Revenue from the sale of fracture simulation software is recognized when title passes to the customer at time of shipment. Revenue from the sale of spill prevention services is recognized at the time service is performed. Revenue from the sale of containment goods is recognized at the time goods are delivered. Shipping and Handling Costs Shipping and handling costs are classified as cost of sales. Shipping costs consist of transportation costs to deliver products to customers. Handling costs include labor and overhead to maintain finished goods inventory and operate distribution facilities. Cost of Start-Up Activities Start-up activities, including organization costs, are expensed as incurred. Start-up costs for 2016 and 2015 related to the start- up of the first phase of a retrofit of an existing plant to produce KRYPTOSPHERE® products. There were no start-up costs for 2017. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Research and Development Costs Research and development costs are charged to operations when incurred and are included in Selling, General and Administrative expenses. The amounts incurred in 2017, 2016 and 2015 were $4,417, $3,817 and $7,047, respectively. New Accounting Pronouncements In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230) – Restricted Cash,” which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Company adopted this guidance as of January 1, 2017. The adoption did not have a material impact on its consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842) ,” which amends current lease guidance. This guidance requires, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at “ F-11 the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The new guidance will be effective for the interim and annual periods beginning after December 15, 2018 with early adoption permitted. The Company is currently evaluating the potential impact of adopting this new guidance on the consolidated financial statements and related disclosures. uu In August 2015, the FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606) – Deferral of the Effective Date,” which revises the effective date of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” (“ASU 2014-09”) to interim and annual periods beginning after December 15, 2017, with early adoption permitted no earlier than interim and annual periods beginning after December 15, 2016. In May 2014, the FASB issued ASU 2014-09, which amends current revenue guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company’s analysis of sales contracts under ASC 606 supports the recognition of revenue at a point in time, typically when title passes to the customer upon delivery, for the majority of contracts, which is consistent with the current revenue recognition model. The Company utilized the modified retrospective approach, which requires a cumulative adjustment to retained earnings and no adjustments to prior periods. The Company adopted this guidance as of January 1, 2018. There was no material impact on the Company’s consolidated financial statements or disclosures. tt tt In July 2015, the FASB issued ASU No. 2015-11, “Inventory (Topic 330),” (“ASU 2015-11”) which amends and simplifies the measurement of inventory. The main provisions of the standard require that inventory be measured at the lower of cost and net realizable value. Prior to the issuance of the standard, inventory was measured at the lower of cost or market (where market was defined as replacement cost, with a ceiling of net realizable value and floor of net realizable value less a normal profit margin). The Company adopted ASU 2015-11 as of January 1, 2017. The adoption did not have a material impact on the Company’s consolidated financial statements and related disclosures. 2. Intangible and Other Assets Following is a summary of intangible assets as of December 31: 2017 2016 Weighted Average Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization Intangibles: Patents and licenses, software and hardware designs ....... Developed technology....................................................... Customer relationships and non-compete ......................... 6 years 10 years 9 years $ $ 5,320 2,782 2,838 10,940 $ $ 3,540 2,295 2,621 8,456 $ $ 5,033 2,782 2,838 10,653 $ $ 3,187 2,017 2,331 7,535 each of the ensuing years through December 31, 2022 is $889, $602, $341, $323 and $40, respectively. Following is a summary of other assets as of December 31: Other assets: Bauxite raw materials: Inventories............................................................................. $ Other assets................................................................................. $ 3,527 $ 5,434 8,961 $ 3,989 1,524 5,513 2017 2016 Bauxite raw materials are used in the production of heavyweight ceramic products. As of December 31, 2017 and 2016, the Company has classified as long-term assets those bauxite raw materials inventories that are not expected to be consumed in production during the upcoming twelve month period. For additional information, refer to Note 4 – Impairment of Long-Lived Assets. Other assets as of December 31, 2017 includes a $4,000 receivable relating to additional money owed us relating to the sale of our Russian proppant business. For additional information, refer to Note 17 – Sale of Russian Proppant Business. dd F-12 3. Long-Term Debt and Notes Payable On March 2, 2017, the Company entered into an Amended and Restated Credit Agreement (the “New Credit Agreement”) with Wilks Brothers, LLC (“Wilks”) to replace its current term loan with Wells Fargo Bank, National Association (“Wells Fargo”) and provide the Company with additional liquidity for a longer term. The New Credit Agreement is a $65,000 facility maturing on December 31, 2022, that consists of a $52,651 term loan that was made at closing to pay off Wells Fargo and an additional term loan of $12,349 that was made to the Company after the Company satisfied certain post-closing conditions. The $52,651 term loan was a non-cash transaction to the Company as Wilks directly paid Wells Fargo and assumed the New Credit Agreement. The Company’s obligations bear interest at 9.00% and are guaranteed by its two operating subsidiaries. No principal repayments are required until maturity (except in unusual circumstances), and there are no financial covenants. In lieu of making cash interest payments, the Company has the option during the first two years of the loan to make interest payments as payment-in-kind, or PIK, by applying an 11.00% rate to the interest payment due (instead of the 9.00% cash interest rate) and capitalizing the resulting amount to the outstanding principal balance of the loan. The Company is required to provide Wilks 30 day notice of its intent to exercise this option for an interest payment. The Company does not anticipate utilizing this option and has therefore accrued interest expense using the 9.00% cash interest rate. The loan cannot be prepaid during the first three years without making the lenders whole for interest that would have been payable over the entire remaining term of the loan. The Company’s obligations under the New Credit Agreement are secured by: (i) a pledge of all accounts receivable and inventory, (ii) cash in certain accounts, (iii) domestic distribution assets residing on owned real property, (iv) the Company’s Marshfield, Wisconsin and Toomsboro, Georgia plant facilities and equipment, and (v) certain real property interests in mines and minerals. Other liens previously in favor of Wells Fargo were released. As of December 31, 2017, the Company’s outstanding debt under its New Credit Agreement was $65,000. During the year ended December 31, 2017, the Company expensed $455 of debt issuance costs relating to the previous Wells Fargo Amended Credit Agreement. As of December 31, 2017, the Company had $853 of unamortized debt issuance costs relating to the New Credit Agreement that are presented as a direct reduction from the carrying amount of the long-term debt obligation. The Company had $9,230 and $11,980 in standby letters of credit issued through Wells Fargo as of December 31, 2017 and December 31, 2016, respectively, primarily as collateral relating to our natural gas commitments and railcar leases. As of December 31, 2016, the Company’s outstanding debt under its previous Wells Fargo Amended Credit Agreement was $55,901, of which $13,000 was classified as current and $42,901 was classified as long-term. As of December 31, 2016, the Company had $497 of debt issuance costs that are presented as a direct reduction from the carrying amount of the long-term debt obligation. For the year ended December 31, 2016, the weighted average interest rate was 6.447% based on LIBOR-based rate borrowings. On March 2, 2017, in connection with entry into the New Credit Agreement, the Company issued a Warrant (the “Warrant”) to Wilks. Subject to the terms of the Warrant, the Warrant entitles the holder thereof to purchase up to 523,022 shares of the Common Stock, at an exercise price of $14.91 per share, payable in cash. The Warrant expires on December 31, 2022. Based on a Form 4 filing with the SEC on December 29, 2017, Wilks owned approximately 11.4% of the Company’s outstanding common stock, and should Wilks fully exercise the Warrant to purchase an additional 523,022 shares, it would hold approximately 13.1% of the Company’s outstanding common stock. The Company allocated the proceeds received of $52,651 to each of these two instruments based on their relative fair values. Accordingly, the Company recorded long-term debt of $48,780 and warrants of $3,871 at inception. The amount associated with the Warrant was recorded as an increase to additional paid-in capital. The original issue discount of the long-term debt will be amortized using the effective interest method over the term of the loan. As of December 31, 2017, the unamortized original issue discount was $3,448. r In May 2016, the Company received proceeds of $25,000 from the issuance of separate unsecured Promissory Notes (the “Notes”) to two of the Company’s Directors. Each Note matures on April 1, 2019 and bears interest at 7.00%. On March 2, 2017, in connection with the New Credit Agreement, the Notes were amended to provide for payment-in-kind, or PIK, interest payments at 8.00% until the lenders under the New Credit Agreement receive two consecutive semi-annual cash interest payments. On April 1, 2017, the Company made a $997 interest payment as PIK, and capitalized the resulting amount to the outstanding principal balance. On October 1, 2017, the Company made a $1,043 interest payment as PIK, and capitalized the resulting amount to the outstanding principal balance. As of March 7, 2018, the outstanding principal balance of the Notes was $27,040. Interest cost for the years ended December 31, 2017, 2016 and 2015 was $8,058, $6,022, and $2,973, respectively, of which $0, $80, and $2,038 was capitalized into the cost of property, plant and equipment in the years ended December 31, 2017, 2016, and 2015, respectively. Interest cost primarily includes interest expense relating to our debts as well as amortization and the write-off of debt issuance costs and amortization of the original issue discount associated with the New Credit Agreement and Warrant. F-13 4. Impairment of Long-Lived Assets During 2017, 2016 and 2015, the Company recorded losses totaling $125,759, $1,065 and $43,697, respectively, on impairment of certain long-lived assets as market conditions changed with regard to demand for certain products offered by the Company. A decline in oil and natural gas prices during the second half of 2014 resulted in a severe decline in market conditions beginning in early 2015. During the fourth quarter of 2015, industry conditions further deteriorated as oil prices fell below $30 per barrel. As a result of these worsening conditions, the Company evaluated substantially all of its long-lived assets for possible impairment as of December 31, 2015. Key assumptions used in the analysis varied by facility. However, the overriding assumptions included: 1) the industry downturn would last longer than originally anticipated, taking up to five years to fully recover; 2) production levels would rise over the recovery period eventually returning to production levels within normal capacity; 3) market pricing would be similar to lower 2015 levels, thus conservatively reducing expected gross profit and thus cash flows; 4) the Company’s wet process manufacturing plants (Toomsboro and Millen, Georgia and Eufaula, Alabama) were evaluated as a group of assets because these facilities manufacture like products; and 5) other facilities were separately evaluated. Pursuant to that analysis, the Company determined that the projected gross cash flows attributable to certain assets did not exceed the carrying value of the assets; therefore, the Company concluded that there was indication of possible impairment. The Company engaged the services of a third party consulting firm to assist with the determination of the fair market value of the related assets and concluded that the assets were impaired. The key assumptions and inputs impacting the fair value analysis were the weighted average cost of capital and perpetuity growth rate as well as certain market data with respect to the property and equipment at each facility. As a result, during the year- ended December 31, 2015, the Company recorded a $36,177 impairment of long-lived assets, primarily relating to machinery and equipment at the McIntyre, Georgia manufacturing plant and Marshfield, Wisconsin sand processing facility. As of December 31, 2017, the remaining carrying value of the previously impaired assets at the McIntyre, Georgia manufacturing plant and Marshfield, Wisconsin sand processing facility was approximately $3,144. During the year-ended December 31, 2016, industry conditions remained depressed, but showed signs of improvement with oil prices above $50 per barrel. The Company evaluated substantially all of its long-lived assets for impairment as of December 31, 2016. Key assumptions were not materially different from the December 31, 2015 analysis, except that we evaluated the Eufaula facility tt separate from the Toomsboro and the Millen facilities given the completion of our KRYPTOSPHERE technology retrofitting in 2016. Pursuant to the December 31, 2016 analysis, the Company determined that the projected gross cash flows attributable to each asset group exceeded the carrying value; therefore, the Company concluded there was no impairment for the year-ended December 31, 2016. As of September 30, 2017, the Company concluded that the Company’s Toomsboro and Millen, Georgia facilities should no longer be evaluated together as a group of assets because the facilities are no longer interchangeable and will not manufacture like products. As a result of the sustained and long-term shift away from base ceramic proppant to less expensive frac sand, the Company has made a strategic decision to focus on growing technology, industrial and mineral processing revenue streams. Our Toomsboro, Georgia plant is being repurposed to produce technology and industrial products, as well as for use in toll processing of minerals. Our Millen, Georgia facility is currently only able to produce base ceramic proppants, but given our current long-term outlook on base ceramic proppant demand, we do not expect to utilize this plant to produce base ceramic proppant. We are currently evaluating opportunities to monetize our assets at our Millen facility. As a result, we evaluated the Toomsboro and Millen, Georgia plants separately for indicators of impairment during the third quarter of 2017. Given the change in the asset groupings of the two facilities and lack of estimated future cash flows associated with the base ceramic production at the Millen facility, the Company identified indicators of impairment at the Millen, Georgia facility as of September 30, 2017. The Company determined that the projected cash flows attributable to our Millen, Georgia facility did not exceed the carrying value of the assets; therefore the Company concluded there was an impairment at that facility. The Company engaged the services of a third party consulting firm to assist with the determination of the fair value of the related assets and concluded that the assets were impaired. The key assumptions and inputs impacting the fair value include third party data and commentary with respect to the property and equipment at our Millen facility. For machinery and equipment and construction in progress, we used a cost approach to estimate the valuation. We applied a 65 percent downward adjustment to calculated replacement cost based on an analysis of construction documents and historical expenditures to remove non-saleable soft costs such as engineering and installation that would have no value to a market participant. Based on discussions with market participants, a salvage value multiplier ranging from 12 percent to 50 percent of the remaining replacement cost basis was applied to arrive at the estimated fair value for the machinery and equipment and construction in progress subject to impairment. For real property, we used a market and cost approach and reconciled the two approaches. In using the market approach, we determined that the value of comparable property ranged from approximately $30 to $40 per square foot, and the concluded value of the property at the Millen facility was approximately $35 per square foot. In using the cost approach, we applied a 94% downward adjustment to the calculated value for the buildings and site improvements as a representation of economic obsolescence. As a result of these valuation procedures, which included the use of Level 3 inputs as defined in Note 9, the Company recognized a $125,759 impairment of long-lived assets, primarily relating to buildings, machinery and equipment, and construction in progress. As of September 30, 2017, as a result of our d F-14 valuation procedures, the fair value of the Millen facility, including land, buildings, machinery and equipment and construction in progress, was approximately $18,786. As of September 30, 2017, related to the other asset groups, there were no events or circumstances that would indicate that carrying amounts of long-lived and other noncurrent assets might be impaired given that results for the first nine months of 2017 generally met our expectations from our analysis as of December 31, 2016 and given that our future outlook of cash flows associated with those asset groups has not significantly changed since that date. ff There were no additional indicators of impairment during the fourth quarter of 2017. As of December 31, 2017, the remaining carrying value of the impaired assets at the Millen facility was approximately $18,471, which included $6,753 classified as construction in progress. The Company also evaluated the carrying value of the long-term portion of bauxite raw materials. Much of the bauxite raw material was intended for use in production at the McIntyre facility. Based upon this evaluation, during 2016 and 2015, the Company recognized an impairment charge of $1,065 and $6,488, respectively, on the long-term portion of the bauxite raw material inventories. There was no such impairment during 2017. The Company assesses goodwill for possible impairment annually or sooner if circumstances indicate possible impairment may have occurred. The Company evaluated goodwill during the fourth quarter of 2015, and as a result of the further decline in the oil and natural gas industry during the fourth quarter of 2015, concluded that Asset Guard Products Inc. (“AGPI”) projected future cash flows were negatively impacted and thus indicated possible impairment of the AGPI goodwill. AGPI was formerly known as Falcon Technologies and Services, Inc. The Company engaged a third party to assist in the evaluation and concluded that impairment had occurred. Fair value, which was determined using a discounted cash flows method, fell below the carrying value. Consequently, during the fourth quarter of 2015, the Company recorded an $8,664 impairment of AGPI goodwill and an $833 impairment of the indefinite-lived AGPI Trademark intangible asset, both the full value of each of those assets. Evaluation of the StrataGen goodwill resulted in no indication of possible impairment. There were no such impairments during 2017 or 2016. During the years ended December 31, 2017, 2016 and 2015, the Company recognized a loss of $19, gain of $176, and gain of $230, respectively, on disposal of various assets. Components of loss on disposal or impairment of assets are as follows: Domestic long-lived assets impairment .................................... $ China assets impairment ........................................................... Goodwill and intangible assets impairment .............................. China CTA gain realization ...................................................... Loss (gain) on disposal of assets............................................... Total..................................................................................... $ For the years ended December 31, 2016 2015 2017 125,759 $ — — — 19 125,778 $ 1,065 $ — — — (176) 889 $ 42,664 1,033 9,497 (8,853) (230) 44,111 5. Leases The Company leases certain property, plant and equipment under operating leases, primarily consisting of railroad equipment leases. Net minimum future rental payments due under non-cancelable operating leases with remaining terms in excess of one year as of December 31, 2017 are as follows: a 2018 ............................................................................................... $ 2019 ............................................................................................... 2020 ............................................................................................... 2021 ............................................................................................... 2022 ............................................................................................... Thereafter ...................................................................................... Total............................................................................................... $ 11,404 12,272 16,239 16,393 13,660 24,660 94,628 Leases of railroad equipment generally provide for renewal options at their fair rental value at the time of renewal. In the normal course of business, operating leases for railroad equipment are generally renewed or replaced by other leases. For the years ended December 31, 2018, 2019 and 2020, minimum future rental payments in the table above are presented net of sublease income F-15 related to subleases of railroad equipment of $3,933, $2,853 and $440, respectively. Rent expense for all operating leases was $20,310 in 2017, $22,040 in 2016 and $23,757 in 2015. For the years ended December 31, 2017, 2016 and 2015, rent expense is stated net of sublease income of $3,040, $4,778 and $5,031, respectively. 6. Income Taxes Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities as of December 31 are as follows: Deferred tax assets: Employee benefits ...................................................................... $ Inventories .................................................................................. Natural gas derivatives ............................................................... Goodwill & other intangibles ..................................................... Net operating loss ....................................................................... Foreign tax credits ...................................................................... Other ........................................................................................... Total deferred tax assets........................................................ Deferred tax liabilities: Depreciation................................................................................ Indefinite-lived intangibles......................................................... Foreign........................................................................................ Total deferred tax liabilities .................................................. Valuation Allowance................................................................. Net deferred tax liabilities ..................................................... $ 2017 2016 836 $ 2,309 610 3,179 59,536 667 2,029 69,166 14,332 209 26 14,567 54,829 (230) $ 1,349 8,811 1,281 4,881 51,722 — 2,028 70,072 71,308 — — 71,308 — (1,236) Significant components of the provision for income taxes for the years ended December 31 are as follows: 2017 2016 2015 Current: Federal ................................................................................. $ State ..................................................................................... Foreign................................................................................. Total current ................................................................... Deferred ................................................................................... $ (375) $ (99) 581 107 (2,134) (2,027) $ (495) $ (496) 445 (546) (50,535) (51,081) $ 1,509 120 966 2,595 (56,800) (54,205) The reconciliation of income taxes computed at the U.S. statutory tax rate to the Company’s income tax expense for the years ended December 31 is as follows: 2017 2016 2015 Amount Percent Amount Percent Amount Percent U.S. statutory rate ......................................................... $ (89,300) (5,684) State income taxes, net of federal tax benefit ............... (619) Mining depletion........................................................... (667) Change in election for foreign tax credits..................... — Foreign tax assets valuation allowance......................... 8,569 Foreign investments...................................................... 876 Stock compensation excess tax deficiency ................... 1,806 Other permanent differences......................................... 28,163 Tax reform deferred rate change................................... 54,829 Valuation allowance ..................................................... $ (2,027) (35.0)% $ (45,923) (3,283) (2.2) (378) (0.2) (2,753) (0.3) — — (323) 3.4 789 0.3 790 0.7 — 11.0 21.5 — (0.8)% $ (51,081) (35.0)% $ (57,312) (3,474) (1,557) 1,442 1,230 847 — 4,619 — — (38.9)% $ (54,205) (2.5) (0.3) (2.1) — (0.2) 0.6 0.6 — — (35.0)% (2.1) (0.9) 0.9 0.7 0.5 — 2.8 — — (33.1)% F-16 As a result of the significant decline in oil and gas activities and net losses incurred over the past several quarters, the Company determined during the year ending December 31, 2017 that it was more likely than not that a portion of our deferred tax assets will not be realized in the future. Accordingly, we established a $54,829 valuation allowance against our deferred tax assets. Our assessment of the realizability of our deferred tax assets is based on the weight of all available evidence, both positive and negative, including future reversals of deferred tax liabilities. In December 2017, the Tax Cuts and Jobs Act (“Tax Legislation”) was enacted. The Tax Legislation significantly revises the U.S. corporate income tax by, among other things, lowering corporate income tax rates, implementing the territorial tax system and imposing a repatriation tax on deemed repatriated earnings of foreign subsidiaries. As of December 31, 2017, the Company has not completed its accounting for the tax effects of enactment of the Tax Act. The Securities and Exchange Commission issued Staff Accounting Bulletin No. 118, or SAB 118, to address the accounting and reporting of the Tax Legislation. SAB 118 allows companies to take a reasonable period, which should not extend beyond one year from enactment of the Tax Legislation, to measure and recognize the effects of the new tax law. The Company has made a reasonable estimate of the effects on existing deferred tax balances and recognized a provisional reduction of approximately $28,163 in the Company’s net deferred tax assets before consideration of the valuation allowance, due primarily to the remeasurement of U.S. deferred tax assets at the lower enacted corporate rate. The Company recorded the adjustment during the fourth quarter of 2017; however, because of an offsetting change in our valuation allowance, there was zero net impact to net income during 2017 as a result of the legislation. The Company is still analyzing certain aspects of the Tax Legislation and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The Company will complete this analysis within the measurement period in accordance with SAB 118. The Company also continues to evaluate the impacts of the newly enacted global intangible low- taxed income (“GILTI”) provisions which subject the Company’s foreign earnings to a minimum level of tax. Because of the complexities of the new legislation, the Company has not elected an accounting policy for GILTI at this time. Recent FASB guidance indicates that accounting for GILTI either as part of deferred taxes or as a period cost are both acceptable methods. Once further information is gathered and interpretation and analysis of the tax legislation evolves, the Company will make an appropriate accounting method election. rr Provision has been made for deferred U.S. income taxes on all foreign earnings based on the Company’s intent to repatriate foreign earnings. During the years ended December 31, 2017 and 2016, the Company did not recognize benefits on foreign investments due to the uncertainty of the Company being able to realize the foreign tax assets in light of current market conditions in China and Russia. This treatment decreased (increased) income tax benefit by $8,569 and ($323) for the years ended December 31, 2017 and 2016, respectively. During 2017, 2016, and 2015, the Company incurred a net operating loss in the United States. Net operating losses associated with the 2015 tax return have been carried back in full, while certain of the net operating losses incurred in 2016 and 2017 are carried forward to offset future taxable income. The cumulative recorded tax benefit of these net operating loss carryforwards totals $59,536 and $51,722 as of December 31, 2017 and 2016, respectively, and is included in the deferred income tax asset on those respective dates. The recorded tax benefit of $59,536 as of December 31, 2017 includes the impact of the change in corporate income tax rate following the enactment of the Tax Legislation. The Company filed amended 2013 and 2014 Federal income tax returns to claim $37,397 of the tax benefit which was received as a refund in April 2016. After finalization of the 2015 Federal return and a change in the attribute of the NOL carryback, additional refunds for 2012 through 2014 tax years are being claimed in the amount of $2,206. These amounts are included within income tax receivable as of December 31, 2017. The federal NOLs generated in 2017 and 2016 will be carried forward until they are utilized or their expiration in 2037 and 2036, respectively. The Company elected to claim bonus tax depreciation totaling $29,221 and $61,781 on assets placed in service in the United States during 2015 and 2014, respectively. This election increased the net operating loss in 2015 and reduced current taxable income in 2014. No such bonus depreciation was elected in 2016 and is not anticipated for 2017. The Company has not recognized any uncertain tax positions as of December 31, 2017. The reserve recorded as of December 31, 2015 of $153 was associated with a period no longer subject to audit and thus was reduced to $0 during 2016. The Company files its tax returns as prescribed by the tax laws of the jurisdictions in which it operates, the most significant of which are U.S. federal and certain state jurisdictions. In 2016, the Company received an audit notice from the Internal Revenue Service for periods 2013-2015. The Company does not anticipate any material findings. The 2016 federal tax year is also subject to examination. Various U.S. state jurisdiction tax years remain open to examination as well, although the Company believes assessments, if any, would be immaterial to its consolidated financial statements. t F-17 7. Shareholders’ Equity Common Stock Holders of Common Stock are entitled to one vote per share on all matters to be voted on by shareholders and do not have cumulative voting rights. Subject to preferences of any Preferred Stock, the holders of Common Stock are entitled to receive ratably such dividends, if any, as may be declared from time to time by the Board of Directors out of funds legally available for that purpose. In the event of liquidation, dissolution or winding up of the Company, holders of Common Stock are entitled to share ratably in all assets remaining after payment of liabilities, subject to prior distribution rights of any Preferred Stock then outstanding. The Common Stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the Common Stock. All outstanding shares of Common Stock are fully paid and non-assessable. n On January 19, 2016, the Board of Directors suspended the Company’s policy of paying quarterly cash dividends. Preferred Stock The Company’s charter authorizes 5,000 shares of Preferred Stock. The Board of Directors has the authority to issue Preferred Stock in one or more series and to fix the rights, preferences, privileges and restrictions thereof, including dividend rights, conversion rights, voting rights, terms of redemption, redemption prices, liquidation preferences and the number of shares constituting any series or the designation of such series, without further vote or action by the Company’s shareholders. Common Stock Repurchase Program On January 28, 2015, the Company’s Board of Directors authorized the repurchase of up to two million shares of the Company’s common stock. Shares are effectively retired at the time of purchase. As of December 31, 2017, the Company had not repurchased any shares under the plan. Equity Offering Program On July 28, 2016, the Company filed a prospectus supplement and associated sales agreement related to an at-the-market (“ATM”) equity offering program pursuant to which the Company may sell, from time to time, common stock with an aggregate offering price of up to $75,000 through Cowen and Company LLC, as sales agent, for general corporate purposes. As of December 31, 2017, the Company sold a total of 3,405,709 shares of its common stock under the ATM program for $46,612, or an average of $13.69 per share, and received proceeds of $45,564, net of commissions of $1,048. These sales occurred during August and September 2016, and the Company has not utilized the program since those sales. 8. Natural Gas Derivative Instruments Natural gas is used to fire the kilns at the Company’s manufacturing plants. In an effort to mitigate potential volatility in the cost of natural gas purchases and reduce exposure to short-term spikes in the price of this commodity, from time to time, the Company enters into contracts to purchase a portion of the anticipated monthly natural gas requirements at specified prices. Contracts are geographic by plant location. Historically, the Company has taken delivery of all natural gas quantities under contract, which exempted the Company from accounting for the contracts as derivative instruments. However, due to the severe decline in industry f activity beginning in early 2015, the Company significantly reduced production levels and consequently did not take delivery of all of the contracted natural gas quantities. As a result, the Company began to account for relevant contracts as derivative instruments. t Derivative accounting requires the natural gas contracts to be recognized as either assets or liabilities at fair value with an offsetting entry in earnings. The Company uses the income approach in determining the fair value of these derivative instruments. The model used considers the difference, as of each balance sheet date, between the contracted prices and the New York Mercantile Exchange (“NYMEX”) forward strip price for each contracted period. The estimated cash flows from these contracts are discounted using a discount rate of 8.0%, which reflects the nature of the contracts as well as the timing and risk of estimated cash flows associated with the contracts. The discount rate had an immaterial impact on the fair value of the contracts for the year ended December 31, 2017 and 2016. The last natural gas contract will expire in December 2018. As a result, during the year ended December 31, 2017 and 2016, the Company recognized a loss on derivative instruments of $917 and a gain on derivative instruments of $1,886, respectively in cost of sales. The cumulative present value of the losses on these natural gas derivative contracts as of December 31, 2017 and 2016 are presented as current and long-term liabilities, as applicable, in the Consolidated Balance Sheet. At December 31, 2017, the Company has contracted for delivery a total of 1,800,000 MMBtu of natural gas at an average price of $4.40 per MMBtu through December 31, 2018. Contracts covering 1,680,000 MMBtu are subject to accounting as derivative instruments. Future decreases in the NYMEX forward strip prices will result in additional derivative losses while future increases in F-18 the NYMEX forward strip prices will result in derivative gains. Future gains or losses will approximate the change in NYMEX natural gas prices relative to the total quantity of natural gas under contracts now subject to accounting as derivatives. The historical average NYMEX natural gas contract settlement prices for the years ended December 31, 2017 and 2016 were $3.11 per MMBtu and $2.46 per MMBtu, respectively. 9. Fair Value Measurements The Company’s derivative instruments are measured at fair value on a recurring basis. U.S. GAAP establishes a fair value hierarchy that has three levels based on the reliability of the inputs used to determine the fair value. These levels include: Level 1, defined as inputs such as unadjusted quoted prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs for use when little or no market data exists, therefore requiring an entity to develop its own assumptions. n The Company’s natural gas derivative instruments are included within the Level 2 fair value hierarchy. For additional information on the derivative instruments, refer to Note 8 – Natural Gas Derivative Instruments. The following table sets forth by level within the fair value hierarchy the Company’s assets and liabilities that were accounted for at fair value: Liabilities: Derivative instruments ....................................................... $ Total fair value.............................................................. $ — $ — $ (2,537) $ (2,537) $ — $ — $ (2,537) (2,537) Fair value as of December 31, 2017 Level 1 Level 2 Level 3 Total Liabilities: Derivative instruments ....................................................... $ Total fair value .............................................................. $ — $ — $ (3,468) $ (3,468) $ — $ — $ (3,468) (3,468) Fair value as of December 31, 2016 Level 1 Level 2 Level 3 Total At December 31, 2017, the fair value of the Company’s long-term debt approximated the carrying value. 10. Stock Based Compensation On May 20, 2014, the shareholders approved the 2014 CARBO Ceramics Inc. Omnibus Incentive Plan (the “2014 Omnibus Incentive Plan”). The 2014 Omnibus Incentive Plan replaces the expired 2009 Omnibus Incentive Plan. In May 2017, the shareholders approved the Amended and Restated 2014 CARBO Ceramics Inc. Omnibus Incentive Plan (the “Amended 2014 Omnibus Plan”). Under the Amended 2014 Omnibus Incentive Plan, the Company may grant cash-based awards, stock options (both non-qualified and incentive) and other equity-based awards (including stock appreciation rights, phantom stock, restricted stock, restricted stock units, performance shares, deferred share units or share-denominated performance units) to employees and non- employee directors. The amount paid under the Amended 2014 Omnibus Incentive Plan to any single participant in any calendar year with respect to any cash-based award shall not exceed $5,000. Awards may be granted with respect to a number of shares of the Company’s Common Stock that in the aggregate does not exceed 1,450,000 shares prior to the fifth anniversary of its effective date, plus (i) the number of shares that are forfeited, cancelled or returned, and (ii) the number of shares that are withheld from thet participants to satisfy an option exercise price or minimum statutory tax withholding obligations. No more than 100,000 shares may be granted to any single participant in any calendar year. Equity-based awards may be subject to performance-based and/or service- based conditions. With respect to stock options and stock appreciation rights granted, the exercise price shall not be less than the market value of the underlying Common Stock on the date of grant. The maximum term of an option is ten years. Restricted stock awards granted generally vest (i.e., transfer and forfeiture restrictions on these shares are lifted) proportionately on each of the first three anniversaries of the grant date, but subject to certain limitations, awards may specify other vesting periods. As of December 31, 2017, 759,326 shares were available for issuance under the Amended 2014 Omnibus Incentive Plan. F-19 A summary of restricted stock activity and related information for the year ended December 31, 2017 is presented below: Nonvested at January 1, 2017 ..................................................... Granted........................................................................................ Vested.......................................................................................... Forfeited ...................................................................................... Nonvested at December 31, 2017 ............................................... Weighted- Average Grant-Date Fair Value Per Share Shares 339,140 $ 297,685 $ (145,643) $ (50,063) $ 441,119 $ 28.59 10.30 36.69 17.19 14.87 As of December 31, 2017, there was $3,183 of total unrecognized compensation cost related to restricted shares granted under Amended and Restated 2014 Omnibus Incentive Plan. That cost is expected to be recognized over a weighted-average period of 1.6 years. The weighted-average grant date fair value of restricted stock granted during the years ended December 31, 2017, 2016 and 2015 was $10.30, $17.27 and $34.62, respectively. The total fair value of shares vested during the years ended December 31, 2017, 2016 and 2015 was $2,023, $6,532 and $6,910, respectively. As of December 31, 2017, the Company’s outstanding market-based cash awards to certain executives of the Company had a total Target Award of $2,822. The amount of awards that will ultimately vest can range from 0% to 200% based on the Company’s Relative Total Shareholder Return calculated over a three year period beginning January 1 of the year each grant was made. The Company also made phantom stock awards to key employees pursuant to the Amended 2014 Omnibus Incentive Plan. The units subject to an award vest and cease to be forfeitable in equal annual installments over a three-year period. Participants awarded units of phantom stock are entitled to a lump sum cash payment equal to the fair market value of a share of Common Stock on the vesting date. In no event will Common Stock of the Company be issued with regard to outstanding phantom stock awards. As of December 31, 2017, there were 163,215 units of phantom stock granted under the Amended 2014 Omnibus Incentive Plan, of which 4,189 have vested and 12,950 have been forfeited. As of December 31, 2017, nonvested units of phantom stock under the Amended 2014 Omnibus Incentive Plan have a total value of $1,487, a portion of which is accrued as a liability within Accrued Payroll and Benefits. 11. Loss Per Share ASC Topic 260, “Earnings Per Share”, provides that unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of earnings per share pursuant to the two-class method. The Company’s outstanding non-vested restricted stock awards are participating securities. Accordingly, earnings per common share are computed using the two-class method. The impact of the Company’s Warrant issued to Wilks in March 2017 was not included in the computation of diluted loss per share because the average price for our common stock was less than the strike price of the Warrant and, therefore, the Warrant was not dilutive for 2017. The Warrant entitles the holder thereof to purchase up to 523,022 shares of the Common Stock, at an exercise price of $14.91 per share, payable in cash. Refer to Note 3. ff F-20 The following table sets forth the computation of basic and diluted loss per share under the two-class method: Numerator for basic and diluted loss per share: Net loss ................................................................................ $ Effect of reallocating undistributed earnings of participating securities...................................................... Net loss available under the two-class method......................................................................... $ Denominator: 2017 2016 2015 (253,116) $ (80,127) $ (109,544) — — — (253,116) $ (80,127) $ (109,544) Denominator for basic loss per share—weighted-average shares ...................................... 26,664,247 24,377,839 22,999,318 Effect of dilutive potential common shares ......................... — Denominator for diluted loss per share—adjusted weighted-average shares ........................ 26,664,247 24,377,839 22,999,318 (4.76) (4.76) Basic loss per share ........................................................ $ Diluted loss per share ..................................................... $ (3.29) $ (3.29) $ (9.49) $ (9.49) $ — — 12. Quarterly Operating Results––(Unaudited) Quarterly results for the years ended December 31, 2017 and 2016 were as follows: March 31 June 30 September 30 December 31 Three Months Ended 2017 Revenues.................................................................................. $ Gross loss................................................................................. Net loss .................................................................................... Loss per share: 34,670 $ (19,458) (32,444) 43,572 $ (13,433) (24,822) 50,173 $ (14,523) (178,465) 60,341 (5,911) (17,384) Basic................................................................................... $ Diluted................................................................................ $ (1.22) $ (1.22) $ (0.93) $ (0.93) $ (6.69) $ (6.69) $ (0.65) (0.65) 2016 Revenues.................................................................................. $ Gross loss................................................................................. Net loss .................................................................................... Earnings per share: 33,102 $ (23,641) (24,684) 20,651 $ (20,012) (20,296) 20,241 $ (20,865) (19,950) 29,058 (20,495) (15,197) Basic................................................................................... $ Diluted................................................................................ $ (1.07) $ (1.07) $ (0.88) $ (0.88) $ (0.81) $ (0.81) $ (0.57) (0.57) Quarterly data may not sum to full year data reported in the Consolidated Financial Statements due to rounding. 13. Segment Information The Company has two operating segments: 1) Oilfield Technologies and Services and 2) Environmental Products and Services. Discrete financial information is available for each operating segment. Management of each operating segment reports to our Chief Executive Officer, the Company’s chief operating decision maker, who regularly evaluates revenue and income (loss) before income taxes as the measure to evaluate segment performance and to allocate resources. The accounting policies of each segment are the same as those described in the summary of significant accounting policies in Note 1. The Company’s Oilfield Technologies and Services segment manufactures and sells ceramic proppants on a global basis for use primarily in the hydraulic fracturing of natural gas and oil wells. All of the Company’s ceramic proppant products have similar production processes and economic characteristics and are marketed predominantly to pressure pumping companies that perform hydraulic fracturing for major oil and gas companies. The Company’s manufacturing facilities also produce ceramic pellets for use in various industrial technology applications, including but not limited to casting and milling. This segment also promotes increased production and Estimated Ultimate Recovery (“EUR”) of oil and natural gas by providing industry leading technology to Design, Build, and Optimize the FracTM. Through our wholly-owned subsidiary StrataGen, Inc., we sell one of the most widely used fracture F-21 stimulation software under the brand FracPro® and provide fracture design and consulting services to oil and natural gas E&P companies under the brand StrataGen. Our Environmental Products and Services segment is intended to protect operators’ assets, minimize environmental risks, and lower lease operating expense (“LOE”). AGPI, a wholly-owned subsidiary of ours, provides spill prevention, containment and countermeasure systems for the oil and gas industry. AGPI uses proprietary technology designed to enable its clients to extend the life of their storage assets, reduce the potential for hydrocarbon spills and provide containment of stored materials. d Summarized financial information for the Company’s operating segments for the three-year period ended December 31, 2017 is shown in the following tables. Intersegment sales are not material. Oilfield Technologies and Services Environmental Products and Services ($ in thousands) 2017 Revenue from external customers ......................................................... $ Loss before income taxes ...................................................................... Total assets ............................................................................................ Capital expenditures, net ....................................................................... Depreciation and amortization .............................................................. 2016 Revenue from external customers ......................................................... $ Loss before income taxes ...................................................................... Total assets ............................................................................................ Capital expenditures, net ....................................................................... Depreciation and amortization .............................................................. 2015 Revenue from external customers ......................................................... $ Loss before income taxes ...................................................................... Total assets ............................................................................................ Capital expenditures, net ....................................................................... Depreciation and amortization .............................................................. 165,557 $ (255,097) 524,952 2,228 44,060 89,351 $ (128,128) 709,180 7,008 46,871 257,373 $ (151,772) 817,845 62,996 52,451 23,199 $ (46) 15,646 (76) 1,277 13,700 $ (3,080) 14,277 (160) 1,580 22,201 $ (11,977) 18,524 (249) 2,006 Total 188,756 (255,143) 540,598 2,152 45,337 103,051 (131,208) 723,457 6,848 48,451 279,574 (163,749) 836,369 62,747 54,457 Geographic Information Long-lived assets, consisting of net property, plant and equipment and other long-term assets, as of December 31 in the United States and other countries are as follows: Long-lived assets: 2017 2016 2015 United States........................................................................ International......................................................................... Total ............................................................................... $ $ 326,665 $ 6,482 333,147 $ 489,374 $ 10,241 499,615 $ 531,518 12,320 543,838 Revenues outside the United States accounted for 21%, 34% and 29% of the Company’s revenues for 2017, 2016 and 2015, respectively. Revenues for the years ended December 31 in the United States, Canada and other countries are as follows: Revenues: United States........................................................................ Canada ................................................................................. Other international............................................................... Total ............................................................................... $ $ 149,040 $ 7,439 32,276 188,756 $ 67,609 $ 7,460 27,982 103,051 $ 199,187 33,614 46,773 279,574 2017 2016 2015 F-22 Sales to Customers The following schedule presents customers, primarily from the Oilfield Technologies and Services segment, from whom the Company derived 10% or more of total revenues for the years ended December 31: 2017 ................................................................... 2016 ................................................................... 2015 ................................................................... A — — 10.7% C Major Customers B 16.1% 20.4% 26.9% — 11.1% — D 10.2% — — 14. Benefit Plans The Company has defined contribution savings and profit sharing plans pursuant to Section 401(k) of the Internal Revenue Code. Benefit costs recognized as expense under these plans consisted of the following for the years ended December 31: Contributions: Profit sharing ....................................................................... $ Savings................................................................................. $ — $ 953 953 $ — $ 939 939 $ — 1,547 1,547 2017 2016 2015 All contributions to the plans are 100% participant directed. Participants are allowed to invest up to 20% of contributions in the n Company’s Common Stock. 15. Commitments In January 2011, the Company entered into an agreement with one of the Company’s existing suppliers to purchase from the supplier at least 70 percent of the annual kaolin requirements for the Eufaula, Alabama plant at specified contract prices. The term of the agreement was three years, with options to extend for an additional six years. In May 2012, the agreement was amended to require the Company to purchase from the supplier at least 50 percent of the annual kaolin requirements for the Eufaula, Alabama plant at specified contract prices for the remainder of 2012 and the ensuing five calendar years. In May 2017, the agreement was automatically extended for an additional three years. For the years ended December 31, 2017, 2016 and 2015, the Company purchased from the supplier $2,207, $968 and $2,380, respectively, of kaolin under the agreement. In January 2003, the Company entered into a mining agreement with a contractor to provide kaolin for the Company’s McIntyre, Georgia plant at specified contract prices, from lands owned or leased by either the Company or the contractor. The term of the agreement, which commenced on January 1, 2003, and remains in effect until such time as all Company-owned minerals have been depleted, previously required the Company to accept delivery from the contractor of at least 80 percent of the McIntyre plant’s annual kaolin requirements. In 2006, the Company’s plant in Toomsboro, Georgia commenced operations and became part of this agreement. In November 2015, the agreement was amended to require the Company to accept delivery from the contractor of 100 percent of the annual kaolin requirements for the plants in McIntyre and Toomsboro. For the years ended December 31, 2017, 2016 and 2015, the Company purchased $950, $1,196 and $3,245, respectively, of kaolin under the agreement. In July 2011, the Company entered into an agreement with a supplier to provide hydro sized sand for the Company’s Marshfield, Wisconsin plant at a specified contract price. The term of the agreement was five years commencing on July 30, 2011 and required the Company to purchase a minimum of 40,000 tons and 100,000 tons of hydro sized sand during 2011 and 2012, respectively. Effective January 30, 2012, the agreement was amended and requires the Company to purchase a minimum of 150,000 tons of hydro sized sand annually during 2012 and 2013 and a minimum of 350,000 tons of hydro sized sand in 2014, all at a stated contract price. There were no purchase commitments required during 2015 through May 2017. Effective June 2017, the Company entered into an agreement to purchase a minimum of 360,000 tons of hydro sized sand in 2017, all at a stated contract price. There are no additional minimum purchase requirements under this contract. For the years ended December 31, 2017, 2016, and 2015, the Company purchased $3,876, $0 and $3,997, respectively, of sand under this agreement. TT In May 2012, the Company entered into a supply agreement with a contractor to provide kaolin for the Company’s manufacturing plant in Millen, Georgia at specified contract prices, from lands owned or leased by either the Company or the contractor. The term of the agreement, which commenced in July 2014, has an initial term of five years with options to extend for an additional five years and requires the Company to accept delivery from the contractor of at least 50 percent of the Millen plant’s F-23 annual kaolin requirements. For the years ended December 31, 2017, 2016 and 2015, the Company purchased $0, $0 and $561, respectively, of kaolin under this agreement. In October 2014, the Company entered into an agreement with a supplier to mine kaolin and process into a slurry for the Company’s manufacturing plant in Millen, Georgia at specified contract prices. The term of the agreement was five years with automatic two (2) year extensions and requires the Company to source at least 50 percent of the Millen plant’s annual slurry requirement from the supplier. For the years ended December 31, 2017, 2016 and 2015, the Company purchased $0, $0 and $1,300, respectively, of slurry under this agreement. In November 2014, the Company entered into an agreement with a supplier to provide frac sand for the Company’s Marshfield, Wisconsin plant at a specified contract price. The term of the agreement, which commenced on November 13, 2014, remains in effect until the specified sand is depleted and required the Company to purchase a minimum of 300,000 tons of frac sand during 2015 and 400,000 tons of frac sand for each year thereafter. Effective October 12, 2015, the Company entered into a Letter Agreement with the supplier resulting in the adjustment of required annual minimum purchased tons of frac sand to 123,203 and 116,599 for years 2015 and 2016, respectively. In July 2016, the Company entered into a Letter Agreement with the supplier which removed the required annual minimum purchased tons of frac sand for 2016. In April 2017, the Company entered into a Letter Agreement with the supplier to purchase a minimum of 400,000 tons in 2017, all at a stated price. The minimum purchase requirements of 400,000 tons for years 2018 and thereafter until the specified sand is depleted remains unchanged. For the years ended December 31, 2017, 2016 and 2015, the Company purchased $3,837, $252 and $1,751, respectively, of frac sand under this agreement. ff In September 2017, the Company entered into an agreement with a supplier to provide frac sand for the Company’s Marshfield, Wisconsin plant at a specified contract price. The contract requires us purchase 16,000 tons of frac sand per month through February 2018. For the year ended December 31, 2017, the Company purchased $675 of frac sand under this agreement. In November 2017, the Company entered into an agreement with a supplier to provide hydro sized sand for the Company’s Marshfield, Wisconsin plant at a specified contract price. The Company agreed to purchase a minimum of 40,000 tons with the option to purchase additional hydro sized sand at the Company’s discretion. As of December 31, 2017, the Company had not yet purchased any hydro sized sand under this agreement. The Company entered into a lease agreement dated November 1, 2008 (“2008 Agreement”) with the Development Authority of Wilkinson County (the “Wilkinson County Development Authority”) and a lease agreement dated November 1, 2012 (“2012 Agreement”) with the Development Authority of Jenkins County (the “Jenkins County Development Authority” and together with the Wilkinson County Development Authority, the “Development Authorities”) each in the State of Georgia. Pursuant to the 2008 Agreement, the Wilkinson County Development Authority holds the title to the real and personal property of the Company's McIntyre and Toomsboro manufacturing facilities and leases the facilities to the Company for an annual rental fee of $50 per year through November 1, 2017, and includes a Company renewal option to extend through November 1, 2021. Pursuant to the 2012 Agreement, the Jenkins County Development Authority holds title to the real estate and personal property of the Company’s Millen, Georgia manufacturing facility, and leases the facility to the Company until the tenth anniversary of completion of the final phase of the facility. At any time prior to the scheduled termination of either lease, the Company has the option to terminate the lease and purchase the property for a nominal fee plus the payment of any rent payable through the balance of the lease term. Furthermore, the Company has security interests in the titles held by the Development Authorities. The Company has also entered into a Memorandum of Understanding (the “MOU”) with the Development Authorities and other local agencies, under which the Company receives tax incentives in exchange for its commitment to invest in the county and increase employment. The MOU with the Jenkins County Development Authority also requires the Company to pay an administrative payment of $50 per year during the term of the Millen lease. The Company is required to achieve certain employment levels in order to retain its tax incentives. In the event the Company does not meet the agreed-upon employment targets or the MOU is otherwise terminated, the Company would be subjected to additional property taxes annually. Based on adverse economic conditions beyond the Company’s control that negatively impacted employment levels, a notice dated December 1, 2015 sent by the Company to the Development Authority of Jenkins County declared a force majeure, which suspended employment levels defined in the original agreement and preserved tax incentives until further notification of the restart of plant operations. The suspension period defined in the amended agreement cannot extend beyond January 1, 2021. Based on adverse economic conditions beyond the Company’s control that negatively impacted employment levels, a notice dated February 1, 2016 sent by the Company to the Development Authority of Wilkinson County declared a force majeure, which suspended employment levels defined in the original agreement and preserved tax incentives until further notification of the restart of plant operations. The Development Authority of Jenkins County and the Development Authority of Wilkinson County has not challenged the Company’s declaring a force majeure. The properties subject to these lease agreements are included in Property, Plant and Equipment (net book value of $262,319 at December 31, 2017) in the accompanying consolidated financial statements. F-24 16. Employment Agreements The Company has an employment agreement through December 31, 2018 with its President and Chief Executive Officer. The agreement provides for an annual base salary and incentive bonus. If the President and Chief Executive Officer is terminated early without cause, the Company will be obligated to pay two years base salary and a prorated incentive bonus. Under the agreement, the timing of the payment of severance obligations to the President in the event of the termination of his employment under certain circumstances has been conformed so that a portion of such obligations will be payable in a lump sum, with the remainder of the obligations to be paid over an 18 month period. The agreement also contains a two-year non-competition covenant that would become effective upon termination for any reason. The employment agreement extends automatically for successive one-year periods without prior written notice. 17. Sale of Russian Proppant Business On July 21, 2017, subsidiaries of the Company Carbo Ceramics (Mauritius) Inc. and Carbo LLC (together, the “Sellers”) entered into a Share Purchase Agreement with Petro Welt Technologies AG and PeWeTe Evolution Limited (together, the “Purchasers”) to sell the Company’s Russian proppant business. The adjusted purchase price is approximately $26,000 for all of the shares of CARBO Ceramics Cyprus Limited held by the Sellers. The transaction received local regulatory approval and closed on September 21, 2017. f During the third quarter of 2017, the Company received gross proceeds of $22,000 related to the sale. We expect to receive additional proceeds on the sale of approximately $4,000 related to net debt and net working capital purchase price adjustments. Although the Company remains in active discussions with the Purchasers regarding the purchase price adjustments, in January 2018, the Company filed a Notice of Arbitration related to this purchase price adjustment against the Purchasers. The net assets included in the calculation of the loss on the sale were $17,754, including cash and cash equivalents of $846, accounts receivable of $6,047, total inventory of $8,573, net PP&E of $2,763, other net assets of $670, and accrued expenses of $1,145. The Company incurred approximately $1,646 in expenses relating to the sale. Gain on the sale before consideration of the cumulative translation adjustment was approximately $6,599. However, as a result of the sale, the Company reclassified the foreign currency cumulative translation loss of $33,347 from accumulated other comprehensive loss within shareholders’ equity to net loss which offset the initial gain on the sale. As a result, the Company’s net loss on the sale was approximately $26,747, presented as a separate line item within operating loss on the consolidated statement of operations. As of December 31, 2017, the Company does not have a material net investment that is subject to foreign currency fluctuations. 18. Legal Proceedings and Regulatory Matters The Company is subject to legal proceedings, claims and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, management does not expect that the ultimate costs to resolve these matters will have a material adverse effect on the Company’s consolidated financial position, results of operations, or cash flows. 19. Subsequent Events In January 2018, the Company awarded the following: 334,638 shares of restricted stock to certain employees. The fair value of the stock award on the date of grant totaled $4,069, which will be recognized as expense, less actual forfeitures as they occur, on a straight-line basis over the three-year vesting period. 51,401 units of phantom shares to certain employees. The fair value of the phantom shares on the date of grant totaled $625. Compensation expense for these shares will be recognized over the three-year vesting period. The amount of compensation expense recognized each period will be based on the fair value of the Company’s common stock at the end of each period. F-25 Exhibit Index Restated Certificate of Incorporation of CARBO Ceramics Inc. (incorporated by reference to Exhibit 3.1 of the Registrant’s Form 10-Q filed for the period ending June 30, 2012) Second Amended and Restated By-Laws of CARBO Ceramics Inc. (incorporated by reference to Exhibit 3.1 of the Registrant’s Form 8-K Current Report filed July 17, 2013) Form of Common Stock Certificate of CARBO Ceramics Inc. (incorporated by reference to Exhibit 4.1 of the Registrant’s Form S-1 Registration Statement No. 333-1884 filed July 19, 1996) (P) Certificate of Designations of Series A Preferred Stock (incorporated by reference to Exhibit 2 of the Registrant’s Form 8-A12B Registration Statement No. 001-15903 filed February 25, 2002) Amended and Restated Mining Agreement dated as of November 30, 2015 between CARBO Ceramics Inc. and Arcilla Mining & Land Co. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2015) Proppant Supply Agreement dated as of August 28, 2008 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.3 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended September 30, 2008) Amendment No. 1 to Proppant Supply Agreement dated as of February 28, 2011 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2011) Side Letter to Proppant Supply Agreement dated as of August 26, 2011 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended September 30, 2011) Amendment No. 3 to Proppant Supply Agreement dated as of March 24, 2014 by and between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2014) Amendment No. 4 to Proppant Supply Agreement dated as of September 25, 2015 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended September 30, 2015) Amendment No. 5 to Proppant Supply Agreement dated as of September 25, 2015 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.10 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2015) Amendment No. 6 to Proppant Supply Agreement dated as of April 30, 2016 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2016) Promissory Note between CARBO Ceramics Inc. and Williams C. Morris (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2016) Promissory Note between CARBO Ceramics Inc. and Robert S. Rubin (incorporated by reference to Exhibit 10.3 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2016) Master Purchase Agreement for Goods and Services dated as of January 18, 2017 between CARBO Ceramics Inc. and Halliburton Energy Services, Inc. (incorporated by reference to Exhibit 10.15 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2016) Lease Agreement dated as of November 1, 2008 between the Development Authority of Wilkinson County and CARBO Ceramics Inc. (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Current Report filed December 30, 2008) Option Agreement dated as of November 1, 2008 between the Development Authority of Wilkinson County and CARBO Ceramics Inc. (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 8-K Current Report filed December 30, 2008) Lease Agreement dated as of November 1, 2012 between the Development Authority of Jenkins County and CARBO Ceramics Inc. (incorporated by reference to Exhibit 10.9 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2012) Amended and Restated 2014 CARBO Ceramics Inc. Omnibus Incentive Plan (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2017) Form of Officer Restricted Stock Award Agreement for Amended and Restated 2014 Omnibus Incentive Plan Form of Non-Employee Director Restricted Stock Award Agreement for Amended and Restated 2014 Omnibus Incentive Plan Form of Officer Restricted Stock Unit Award Agreement for Amended and Restated Omnibus 2014 Incentive Plan 3.1 3.2 4.1 4.2 **10.1 **10.2 **10.3 10.4 10.5 **10.6 **10.7 10.8 10.9 10.10 **10.11 10.12 10.13 10.14 *10.15 *10.16 *10.17 *10.18 33  *10.19 *10.20 *10.21 *10.22 *10.23 10.24 10.25 10.26 10.27 10.28 10.29 10.30 10.31 10.32 10.33 10.34 10.35 10.36 10.37 Description of Annual Non-Employee Director Stock Grants (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2010) Description of Modification to Annual Non-Employee Director Stock Grants (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2011) Description of Modification to the Annual Non-Employee Director Stock Grants (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2012) Description of Modification to Annual Non-Employee Director Stock Grants (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2013) Description of Modification to Annual Non-Employee Director Stock Grants (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2014) Office Lease dated as of January 20, 2009 between I-10 EC Corridor #2 Limited Partnership and CARBO Ceramics Inc. (incorporated by reference to Exhibit 10.27 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2009) First Amendment to Lease dated as of January 15, 2010 between I-10 EC Corridor #2 Limited Partnership and CARBO Ceramics Inc. (incorporated by reference to Exhibit 10.28 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2009) Second Amendment to Lease dated as of March 1, 2015 between I-10 EC Corridor #2 Limited Partnership and CARBO Ceramics Inc. (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 8-K Current Report filed March 16, 2015) Credit Agreement, dated as of January 29, 2010, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Current Report filed February 4, 2010) Amendment No. 1, dated as of March 5, 2012, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Current Report filed March 6, 2012) Amendment No. 2 to Credit Agreement, dated as of July 25, 2013, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2013) Amendment No. 3 to Credit Agreement, dated as of October 31, 2014, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended September 30, 2014) Amendment No. 4 to Credit Agreement, dated as of July 27, 2015, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2015) Amendment No. 5 to Credit Agreement, dated as of September 14, 2015, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended September 30, 2015) Amendment No. 6 to Credit Agreement, dated as of February 26, 2016, among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.37 of the Registrant’s Form 10-K Annual Report for the year ended December 31, 2015) Agreement and Amendment No. 7 to the Credit Agreement, dated as of April 27, 2016, by and among CARBO Ceramics Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, issuing lender and swing line lender, and the lenders named therein (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2016) Amended and Restated Pledge and Security Agreement, dated as of April 27, 2016, by and between CARBO Ceramics Inc., as borrower and Wells Fargo Bank, National Association, as administrative agent (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2016) Patent and Trademark Security Agreement dated as of April 27, 2016 by and among CARBO Ceramics Inc., as borrower, certain Material Domestic Subsidiaries of the Borrower and Wells Fargo Bank, National Association, as administrative agent (incorporated by reference to Exhibit 10.3 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2016) Waiver Agreement dated as of April 27, 2016, by and among CARBO Ceramics Inc., as borrower, certain Lenders parties thereto and Wells Fargo Bank, National Association, as administrative agent (incorporated by reference to Exhibit 10.4 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2016) 34  10.38 10.39 *10.40 10.41 10.42 10.43 10.44 10.45 10.46 *10.47 10.48 10.49 ***10.50 21 23 31.1 31.2 32 95 101 Guaranty Agreement dated as of April 27, 2016, by and among certain Guarantors of CARBO Ceramics Inc. thereto and Wells Fargo Bank, National Association, as administrative agent (incorporated by reference to Exhibit 10.5 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2016) Security Agreement, dated July 27, 2015, among CARBO Ceramics Inc., as borrower and Wells Fargo Bank, National Association, as administrative agent (incorporated by reference to Exhibit 10.3 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2015) Form of Change in Control Severance Agreement (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2012) Sales Agreement between CARBO Ceramics Inc. and Cowen and Company, LLC, dated July 28, 2016 (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Current Report filed July 28, 2016) Amended and Restated Credit Agreement dated as of March 2, 2017, by and between CARBO Ceramics Inc., as borrower, and Wilks Brothers, LLC, as lender and administrative agent (incorporated by reference to Exhibit 10.1 of the Registrant’s Form 8-K Current Report filed March 6, 2017) Letter Agreement, dated as of March 2, 2017, by and between Carbo Ceramics Inc., Wilks Brothers, LLC, William C. Morris, Robert S. Rubin and Gary A. Kolstad (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 8-K Current Report filed March 6, 2017) Registration Rights Agreement, dated as of March 2, 2017, by and between Carbo Ceramics Inc. and Wilks Brothers, LLC (incorporated by reference to Exhibit 10.3 of the Registrant’s Form 8-K Current Report filed March 6, 2017) Warrant, dated as of March 2, 2017, issued by Carbo Ceramics Inc. to Wilks Brothers, LLC (incorporated by reference to Exhibit 10.4 of the Registrant’s Form 8-K Current Report filed March 6, 2017) Second Amended and Restated Pledge and Security Agreement, dated as of March 2, 2017, by and among CARBO Ceramics Inc., as borrower, and Wilks Brothers, LLC, as administrative agent (incorporated by reference to Exhibit 10.5 of the Registrant’s Form 8-K Current Report filed March 6, 2017) Fifth Amended and Restated Employment Agreement dated as of March 20, 2017, by and between CARBO Ceramics Inc. and Gary A. Kolstad (incorporated by reference to Exhibit 10.6 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2017) Letter Agreement, dated as of March 2, 2017, between CARBO Ceramics Inc. and William C. Morris (incorporated by reference to Exhibit 10.7 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2017) Letter Agreement, dated as of March 2, 2017, between CARBO Ceramics Inc. and Robert S. Rubin (incorporated by reference to Exhibit 10.8 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended March 31, 2017) Share Purchase Agreement between Carbo Ceramics (Mauritius) Inc. and CARBO LLC and Petro Welt Technologies AG and PeWeTe Evolution Limited, dated as of July 21, 2017 (incorporated by reference to Exhibit 10.2 of the Registrant’s Form 10-Q Quarterly Report for the quarter ended June 30, 2017) Subsidiaries Consent of Independent Registered Public Accounting Firm Rule 13a-14(a)/15d-14(a) Certification by Gary A. Kolstad Rule 13a-14(a)/15d-14(a) Certification by Ernesto Bautista III Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 Mine Safety Disclosure The following financial information from the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, formatted in XBRL: (i) Consolidated Balance Sheets; (ii) Consolidated Statements of Operations; (iii) Consolidated Statements of Comprehensive Loss; (iv) Consolidated Statements of Shareholders’ Equity; (v) Consolidated Statements of Cash Flows; and (vi) Notes to the Consolidated Financial Statements. * ** Management contract or compensatory plan or arrangement filed as an exhibit pursuant to Item 15(b) of the requirements for an Annual Report on Form 10-K. Pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, confidential portions of these exhibits have been omitted and filed separately with the Securities and Exchange Commission pursuant to a request for confidential treatment. *** The schedules and Exhibit A to the Share Purchase Agreement have been omitted from this filing pursuant to Item 601(b)(2) of Regulation S-K. The Company agrees to furnish supplementally a copy of any omitted schedule to the SEC upon request. (P) Paper exhibits 35 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 CARBO Ceramics Inc. By: By: /S/ GARY A KOLSTAD Gary A. Kolstad President and Chief Executive Officer /S/ ERNESTO BAUTISTA III Ernesto Bautista III Vice President and Chief Financial Officer Dated: March 7, 2018 36 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Gary A. Kolstad and Ernesto Bautista III, jointly and severally, his attorneys-in-fact, each with the power of substitution, for him in any and all capacities, to sign any amendments to this Report on Form 10-K, and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that each of said attorneys-in-fact, or his substitute or substitutes, may do or cause to be done by virtue hereof. 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 and on the dates indicated. Signature /S/ WILLIAM C. MORRIS William C. Morris /S/ GARY A. KOLSTAD Gary A. Kolstad /S/ ERNESTO BAUTISTA III Ernesto Bautista III /S/ SIGMUND L. CORNELIUS Sigmund L. Cornelius /S/ CHAD C. DEATON Chad C. Deaton /S/ H.E. LENTZ, JR. H.E. Lentz, Jr. /S/ RANDY L. LIMBACHER RR Randy L. Limbacher /S/ ROBERT S. RUBIN Robert S. Rubin RR Date March 7, 2018 March 7, 2018 March 7, 2018 March 7, 2018 March 7, 2018 March 7, 2018 March 7, 2018 March 7, 2018 Title Chairman of the Board President, Chief Executive Officer and Director (Principal Executive Officer) Vice President and Chief Financial Officer (Principal Financial and Accounting Officer) Director Director Director Director Director 37 Corporate Information BOARD OF DIRECTORS William C. Morris Chairman of the Board, CARBO Ceramics Inc. Chairman of the Board, Clysar, LLC and Gulf Coast Supply & Manufacturing, LLC Sigmund L. Cornelius President & COO, Freeport LNG, L.P. Chad Deaton Retired Chairman & Chief Executive Officer, Baker Hughes Incorporated Gary A. Kolstad President and Chief Executive Officer, CARBO Ceramics Inc. H. E. Lentz, Jr. Former Managing Director, Lazard Frères & Co. Randy L. Limbacher Chief Executive Officer, Meridian Energy LLC CORPORATE OFFICERS Gary A. Kolstad President and Chief Executive Officer Ernesto Bautista, III Vice President and Chief Financial Officer Don P. Conkle Vice President, Marketing and Sales Roger Riffey Vice President, Manufacturing Ellen M. Smith Vice President, Human Resources Robert J. Willette Vice President and General Counsel Paul Howard Vice President, Research and Development Stephen Love Vice President, Industrial Technology CORPORATE OFFICES Energy Center II 575 N. Dairy Ashford Suite 300 Houston, Texas 77079 281-921-6400 STOCK EXCHANGE LISTING The New York Stock Exchange Symbol: CRR TRANSFER AGENT AND REGISTRAR Computershare PO Box 50500, Louisville, KY 40233-5000 800-635-9270 INDEPENDENT AUDITORS Ernst & Young LLP New Orleans, Louisiana FORM 10-K A copy of the Company’s Annual Report to the Securities and Exchange Commission (Form 10-K) is available free of charge by contacting: Ernesto Bautista, III Chief Financial Officer CARBO Ceramics Inc. 575 N. Dairy Ashford Suite 300 Houston, Texas 77079 CERTIFICATIONS The certifications required by Section 302 of the Sarbanes-Oxley Act of 2002 were filed as exhibits to the Form 10-K. In addition, we have submitted to the New York Stock Exchange the annual certification of our Chief Executive Officer regarding the Company’s compliance with the NYSE corporate governance listing standards. INVESTOR RELATIONS Additional corporate information is available from our website at www.carboceramics.com or by e-mailing the Company at IR@carboceramics.com. Mission Statement – Profitable Growth for CARBO and Clients Production Enhancement: Our Production Enhancement businesses increase E&P Operators’ Production and EUR by providing industry-leading technology to Design, Build and Optimize the Frac. Performance Enhancement: Our Industrial Performance Enhancement business increases manufacturers’ process efficiency, improves end-product quality and reduces operating costs. Environmental Services: Our Environmental Services business protects E&P Operators’ assets, minimizes environmental risk and lowers lease operating expenses (LOE). Core Values We achieve our mission within the framework established by our core values. • HSE: We are committed to a Safe and Healthy workplace and protection of the Environment. • Ethics: We conduct our business with the highest ethical standards. We are truthful and honor our commitments and responsibilities. • Respect: We foster a supportive environment by treating each other with mutual respect and understanding. • Goals: We set aggressive goals and strive to exceed them. • Results: We value and celebrate a high level of individual achievement and team performance. • Profitable Growth: We encourage innovation and continuous improvement to ensure future profitable business growth. Energy Center II 575 N. Dairy Ashford Suite 300 Houston, TX 77079 Corporate Office: 281-921-6400 www.carboceramics.com 

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