Air Transport Services Group
Annual Report 2017

Plain-text annual report

2017 Annual Report SM Air Transport Services Group, Inc. 145 Hunter Drive Wilmington, Ohio 45177 www.atsginc.com OUTSIDE BACK COVER OUTSIDE FRONT COVER Air Transport Services Group 2017 Annual Report Air Transport Services Group 2017 Annual Report To Our Shareholders Investor Information Your company ended 2017 with substantial increases in revenues and earnings on the strength of very good performances by all of our businesses. On a consolidated basis, fourth-quarter revenues increased by more than $100 million to $323 million, and by nearly $300 million for the year to $1.1 billion. Those are record totals for us since our business model changed in 2010. We earned $21.7 million, or 36 cents per share diluted in 2017, up from $21.1 million, or 33 cents per share diluted in 2016, as recorded under Generally Accepted Accounting Principles. Two non-cash items, however, had a major effect on those GAAP results. The largest was a net loss for the year from revaluation of warrants we have issued to Amazon incrementally under commercial agreements we signed with them in 2016. These revaluations occur quarterly, and reflect changes in the size of our warrant liability from share-price changes and additional vested warrants. Unrealized losses tied to increases in that liability are in part good news for shareholders, as losses are driven mainly by increases in our stock price. The Amazon warrant revaluation loss, plus non- cash amortization of the lease incentives also tied to the warrants, was $95.7 million in 2017. The other principal item affecting our GAAP results was a $59.9 million tax benefit from the tax-law changes enacted in December. 2017’s solid performance was aided by across-the-board growth in each of our businesses and a solid peak season of airline service for our customers. In August, we completed our commitment to supply Amazon with twenty leased 767s to serve as the backbone of its new air network, plus the flight crews, maintenance, and logistics to support them. As a result, Amazon became our largest customer in 2017, accounting for 44 percent of our total revenues. DHL revenues were 24 percent, and the U.S. Military 7 percent of our total revenues. The principal factor for the airlines was expanded flying during a busy peak, which included operations for our principal customers, DHL and Amazon, as well as some peak season flying for other customers. Taken together, our block hours exceeded the prior year by 22 percent. Also contributing to our airlines improved performance was a reduction in year-over-year expense associated with scheduled airframe inspections. Board of Directors Stock Information NASDAQ: ATSG. Company documents electronically filed with the SEC also may be found at www.atsginc.com. Registrar and Transfer Agent Computershare Investor Services (877) 581-5548 or (781) 575-2879 www.computershare.com/investor P.O. Box 30170 221 Quality Circle, Ste 210 College Station, TX 77842 Randy D. Rademacher Sr. Vice President and Chief Financial Officer for Reading Rock, Inc., a privately owned manufacturer and distributor of concrete products and other building materials, since 2008. Mr. Rademacher has been a Director of the Company since December 2006 and Chairman of the Board since May 2015. He is a member of both the Audit Committee and the Nominating and Governance Committee. Richard M. Baudouin Senior Advisor for Infinity Transportation, a company owned by Global Atlantic Financial Corp., since 2016. Prior to his current role at Infinity Transportation, Mr. Baudouin was a principal of Infinity Aviation Capital, LLC, an investment firm involved in aircraft leasing, from 2011 to 2016, and was a co-founder and former managing director of Aviation Capital Group, a commercial aircraft leasing company, from 1989 to 2010. Mr. Baudouin has been a Director of the Company since January 2013. He is the Chairman of the Nominating and Governance Committee and is a member of the Audit Committee. Joseph C. Hete President and Chief Executive Officer of Air Transport Services Group, Inc. and Chief Executive Officer of ABX Air, Inc. Mr. Hete has been with the company since 1980. . y h p a r g o t o h P 2 P T N : y h p a r g o t o h p r o i r e t n I . m a h g n i n n u C l u a P : n g i s e D - . c n I , p u o r G s e c i v r e S t r o p s n a r T r i A 8 1 0 2 © Independent Auditors Deloitte & Touche LLP Cincinnati, Ohio Annual Meeting The annual meeting of stockholders will be May 10, 2018, at 11 a.m. local time at The Roberts Centre, 123 Gano Road, Wilmington, Ohio. Investor Relations Telephone inquiries may be directed to (937) 434-2700. Raymond E. Johns, Jr. (General USAF Ret.) Executive Vice President of FlightSafety International Inc., a global provider of flight training for commercial, business and military aviation professionals and flight simulation equipment, since 2014. Prior to his retirement from the military, Mr. Johns led the U.S. Air Force Air Mobility Command at Scott Air Force Base in Illinois. Mr. Johns has been a Director of the Company since October 2017. He is a member of both the Audit Committee and Nominating and Governance Committee. J. Christopher Teets Partner of Red Mountain Capital Partners LLC, an investment management firm, since 2005. Mr. Teets has been a Director of the Company since February 2009. He is the Chairman of the Compensation Committee and a member of the Nominating and Governance Committee. Jeffrey J. Vorholt Independent consultant and private investor. Mr. Vorholt was formerly a full-time faculty member at Miami University (Ohio) and concurrently an Adjunct Professor of Accountancy at Xavier University (Ohio) from 2001 to 2006. A CPA and attorney, he was the Chief Financial Officer of Structural Dynamics Resource Corporation from 1994 until its acquisition by EDS in 2001. Mr. Vorholt has been a Director of the Company since January 2004. He is the Chairman of the Audit Committee and is a member of the Compensation Committee. INSIDE FRONT COVER INSIDE BACK COVER Air Transport Services Group 2017 Annual Report Air Transport Services Group 2017 Annual Report CAM, our leasing business, had a good year, despite lower margins. Additional earnings from a larger leased fleet were offset by higher lease incentives to Amazon, depreciation, and increased interest expense as CAM’s portfolio of aircraft expanded to meet the strong demand for leased 767s. CAM also absorbed a $2 million non-cash charge to its share of our interest expense tied to the convertible feature of debt we issued in late September. 2018 is off to a great start. In March 2018, the pilot employees of our subsidiary Air Transport International, Inc. ratified an amendment to the collective bargaining agreement between ATI and their representative, the Air Line Pilots Association. The amended agreement extends four years from its ratification and will support ATI’s continued growth and superior service to customers. We are targeting $300 million in capital expenditures, roughly what we spent in 2017, mainly to deliver ten more converted Boeing 767 freighters this year, and place them with customers under multi-year dry leases. Two of those will be from a group of three additional feedstock 767-300s we are acquiring in 2018. We may buy more if our demand projections prove out. We have adopted the FASB’s new revenue recognition standard, and revised our segment reporting structure for 2018. Under the new rules, revenues related to costs of aircraft fuel and certain other aviation-related expenses that are directly reimbursed to ATSG and controlled by the customer will be reported net of the corresponding expenses. Had those rules been in effect for 2017, our revenue would have been approximately $290 million lower than the $1.1 billion we reported, with no changes to earnings or cash flows. Our aircraft maintenance and conversion operations will now be reported in a new segment called MRO Services. Other Activities will include our ground services, equipment leasing, and postal center services, plus corporate and other customer support operations. We also took steps last year to de-risk our balance sheet, while preserving our long-term access to attractive low-cost growth capital. In March, we amended our secured revolving credit facility to add $120 million in borrowing capacity. In August, we offloaded a portion of our pension liability to an annuity underwriter. And in September, we issued $259 million in 1.125% convertible notes. As of January 1, 2018, nearly 80 percent of our $575 million in debt principal was fixed rate, with an average coupon rate of under 3 percent. We entered 2018 with $291 million available under our revolving credit facility. Our cash flow from 4 1 Air Transport Services Group 2017 Annual Report Air Transport Services Group 2017 Annual Report operations, which rose 22 percent in 2017, should continue to grow as our fleet expands, even as we continue to maintain a conservative debt leverage profile. Our additional 767 aircraft purchases and planned deployments in 2018 are the best way we can tell you that we are very positive about the economy in general, and the express-network portion of the air cargo business that we serve directly. We expect all of our 2018 aircraft deployments to be straight external dry leases that the customer will operate. Most are already committed to customers, and most will use some or all of our maintenance capabilities. A significant part of the market opportunity we serve is driven by increases in e-commerce fulfillment demand, which is driving the growth of express networks providing same- and second-day service to points throughout the U.S. and around the world. Our goal is to remain the No. 1 source of dedicated midsize freighters that are essential elements of those networks. With that goal in mind, we are expanding our aircraft type offerings within the midsize niche to offer models that can efficiently extend those networks into smaller markets. We teamed with Precision Conversions last year to develop a converted freighter variant of the Airbus A321, an aircraft with a great record of reliability and efficiency for passenger airlines around the world. It combines the operating efficiency of a smaller narrow-body like the Boeing 737, but with the cubic capacity of the larger narrow-body Boeing 757s we operate today. Once approved, we intend for CAM to invest in A321s and convert them to freighters to support customers eager for the cost-efficient capacity they can provide. Our strategy remains to maximize cash flow and invest it where we can find the highest return. For now, that’s primarily to invest in the very same attractive aircraft assets that have made us so successful thus far and have delivered the substantial shareholder returns we all have enjoyed the last few years. Joseph C. Hete President & Chief Executive Officer Air Transport Services Group, Inc. A321-200PCF FEATURES 1. Class A Flight Deck and vestibule 5. Class E main deck cargo compartment 9. L4/R4 doors deactivated as basic configuration 2. 9G rigid barrier / smoke barrier 6. Class C lower deck cargo compartment unchanged 3. Main deck cargo door 142” x 86” 7. Installation of main deck cargo 4. MDCD hydraulically actuated and loading system electronically sequenced (self-contained) 8. Window plugs installed 10. Reinforced floor structure 11. L2/R2 door deleted 12. 68.7” clearance for CFM-56 and 62.2” for V2500 13. L3/R3 doors deleted 2 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ________________________________________________________________ FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2017 Commission file number 000-50368 ________________________________________________________________ (Exact name of registrant as specified in its charter) ________________________________________________________________ Delaware (State of Incorporation) 26-1631624 (I.R.S. Employer Identification No.) 145 Hunter Drive, Wilmington, OH 45177 (Address of principal executive offices) 937-382-5591 (Registrant’s telephone number, including area code) ________________________________________________________________ Securities registered pursuant to Section 12(b) of the Act: Common Stock, Par Value $.01 per share (Title of class) Name of each exchange on which registered: NASDAQ Stock Market LLC 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 Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES NO NO Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES NO Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulations 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 NO 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, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one): Large accelerated filer Non-accelerated filer (Do not check if a smaller reporting company) Accelerated filer Smaller reporting company Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES NO The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, as of the last business day of the registrant’s most recently completed second fiscal quarter: $1,260,495,219. As of March 1, 2018, 59,067,276 shares of the registrant’s common stock, par value $0.01, were outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the Proxy Statement for the Annual Meeting of Stockholders scheduled to be held May 10, 2018 are incorporated by reference into Parts II and III. FORWARD LOOKING STATEMENTS This annual report on Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Item 7, contains forward-looking statements, within the meaning of the Private Securities Litigation Reform Act of 1995, that involve risks and uncertainties. Forward-looking statements provide current expectations of future events based on certain assumptions and include any statement that does not directly relate to any historical or current fact. Forward-looking statements can also be identified by words such as “future,” “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “predicts,” “will,” “would,” “could,” “can,” “may,” and similar terms. Forward-looking statements are not guarantees of future performance and the Company’s actual results may differ significantly from the results discussed in the forward-looking statements. Factors that might cause such differences include, but are not limited to, those discussed in “Risk Factors” in Item 1A . The Company assumes no obligation to revise or update any forward-looking statements for any reason, except as required by law. AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES 2017 FORM 10-K ANNUAL REPORT TABLE OF CONTENTS Item 1. Business Item 1A. Item 1B. Item 2. Item 3. Item 4. Risk Factors Unresolved Staff Comments Properties Legal Proceedings Mine Safety Disclosures PART I PART II Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Item 6. Item 7. Item 7A. Item 8. Item 9. Item 9A. Item 9B. Item 10. Item 11. Item 12. Item 13. Item 14. Equity Securities Selected Consolidated Financial Data Management’s Discussion and Analysis of Financial Condition and Results of Operations Quantitative and Qualitative Disclosures About Market Risk Financial Statements and Supplementary Data Changes in and Disagreements With Accountants on Accounting and Financial Disclosure Controls and Procedures Other Information Directors, Executive Officers and Corporate Governance PART III Executive Compensation Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters Certain Relationships and Related Transactions, and Director Independence Principal Accounting Fees and Services Item 15. Exhibits and Financial Statement Schedules SIGNATURES PART IV Page 1 11 18 18 19 19 20 22 23 42 44 80 80 82 82 83 83 83 83 83 90 [This page intentionally left blank] PART I ITEM 1. BUSINESS Company Overview Air Transport Services Group, Inc. is a holding company whose subsidiaries primarily operate within the airfreight and logistics industry. We lease aircraft and provide airline operations, ground services, aircraft modification and maintenance, and other support services mainly to the cargo transportation and package delivery industries. Our subsidiaries offer a range of complementary services to delivery companies, freight forwarders, airlines and government customers. We offer standalone services along with bundled, customized solutions, scalable to our customers' needs. (When the context requires, we may use the terms “Company” and “ATSG” in this report to refer to the business of ATSG and its subsidiaries on a consolidated basis.) Our services are summarized below. Aircraft leasing: We lease cargo aircraft through ATSG's leasing subsidiary, Cargo Aircraft Management, Inc. (“CAM”). CAM services global demand for medium range and medium capacity airlift by offering Boeing 767, 757 and 737 aircraft leases. CAM is able to provide competitive lease rates by converting passenger aircraft into cargo freighters. CAM monitors the market for available medium passenger aircraft, typically 15 to 20 years beyond their original manufacture date. After evaluation of an aircraft's condition and technical specifications, CAM acquires passenger aircraft that meet its requirements for projected into-service costs and rate of return targets. CAM then manages the modification of a passenger aircraft into a freighter. As a result, the converted freighters can be deployed into regional markets more economically than larger capacity aircraft, newly built freighters or other competing alternatives. CAM's aircraft leases are typically under multi-year agreements. ACMI services: ATSG wholly owns two airlines, ABX Air, Inc. (“ABX”) and Air Transport International, Inc. (“ATI”), each independently certificated by the U.S. Department of Transportation. The Company's airlines separately offer a combination of aircraft, crews, maintenance and insurance services. These services are commonly referred to as ACMI services or CMI services depending on the selection of services contracted. ABX operates Boeing 767 freighter aircraft, while ATI operates Boeing 767 and Boeing 757 freighter and 757 "combi" aircraft. Combi aircraft are capable of carrying passengers and cargo containers on the main deck. The airlines can conduct cargo operations worldwide. Support services: We provide transportation related services such as aircraft maintenance, crew training and ground handling to delivery companies, freight forwarders and other airlines. Customers who lease our aircraft often need related support services. Offering support services provides us with a competitive advantage for diversification and incremental revenues. Our businesses and subsidiaries providing support services are summarized below: • Ground Services: We provide mail and package sorting services, as well as related maintenance services for material handling equipment, ground equipment and facilities through our LGSTX Services, Inc. (“LGSTX”) subsidiary. LGSTX also rents ground equipment and sells aviation fuel in Ohio. • Aircraft maintenance and modification services: We provide airframe modification and maintenance, component repairs, engineering services and aircraft line maintenance through our subsidiaries Airborne Maintenance and Engineering Services, Inc. (“AMES”) and Pemco World Air Services, Inc. ("Pemco"). AMES Material Services, Inc. ("AMS") resells and brokers aircraft parts. ABX also provides line maintenance services at certain airports. • Flight support services: We offer flight crew training, air dispatch and flight monitoring. The business development and marketing activities of our operating subsidiaries are supported by the Company's Airborne Global Solutions, Inc. ("AGS") subsidiary. AGS markets the various services and products offered by our subsidiaries by bundling solutions that leverage the entire portfolio of our subsidiaries' capabilities and experience in global cargo operations. Our bundled services are flexible and scalable to complement the customers own resources to support operational growth. Further, AGS assists our subsidiaries in achieving their sales and marketing plans by identifying customers' business and operational requirements while providing sales leads. 1 General Business Development The Company is incorporated in Delaware and its headquarters is in Wilmington, Ohio. ATSG's common shares are publicly traded on the NASDAQ Stock Market under the symbol ATSG. ATSG was formed in 2007 for the purpose of creating a holding company structure that resulted in ABX, which was incorporated in 1980, becoming a subsidiary of ATSG. Between 1980 and August 2003, ABX was an affiliate of Airborne, Inc. (“Airborne”), a former publicly traded, integrated delivery service provider. On August 15, 2003, ABX was separated from Airborne and became an independent publicly traded company, in conjunction with the acquisition of Airborne by an indirect wholly-owned subsidiary of DHL Worldwide Express, B.V. In 2004, we began to provide mail sorting services to the United States Postal Service, ("USPS"). The Company acquired CAM, ATI and Capital Cargo International Airlines, Inc. ("CCIA") on December 31, 2007. ATI began operations in 1979 and was an affiliate of BAX Global, Inc. (“BAX/Schenker”) prior to 2006. In 2009, a significant portion of the aircraft maintenance operations of ABX, including a hangar facility in Wilmington, were spun-out into AMES, a wholly-owned subsidiary of the Company. Similarly, in 2010, the material handling and aviation ground support operations of ABX were spun-out into a wholly-owned subsidiary of the Company, now known as LGSTX. During 2013, we merged CCIA into ATI, with ATI as the surviving entity. In January 2014, we acquired a 25 percent equity interest in West Atlantic AB of Gothenburg, Sweden. West Atlantic AB, through its two airlines, Atlantic Airlines Ltd. and West Atlantic Sweden AB, operates a fleet of approximately 45 aircraft. West Atlantic AB operates its aircraft on behalf of European regional mail carriers and express logistics providers. The airlines operate a combined fleet of British Aerospace ATPs, Bombardier CRJ-200-PFs, and Boeing 767 and 737 aircraft. We account for our equity interest under the equity method of accounting. The Company has had long term contracts with DHL since August 2003. In 2010, we entered into commercial agreements with DHL under which DHL leased thirteen Boeing 767 freighter aircraft from CAM and ABX operates those aircraft under a separate crew, maintenance and insurance agreement. The initial term of the operating agreement was five years, while the terms of the aircraft leases were seven years. Effective April 1, 2015, the Company and DHL amended and restated the agreements (together the "CMI agreement") which extended the Boeing 767 aircraft lease terms and the operation of those aircraft through March 2019 and added two aircraft leases for Boeing 767 aircraft. In September 2015, we began to operate a trial air network for Amazon.com Services, Inc. ("ASI"), the successor to Amazon Fulfillment Services, Inc., a subsidiary of Amazon.com, Inc. (“Amazon”). We provided cargo handling and logistical support as the network grew to five dedicated Boeing 767 freighter aircraft during 2015. On March 8, 2016, the Company and ASI entered into an Air Transportation Services Agreement (the “ATSA”) which became effective April 1, 2016. Pursuant to the ATSA, CAM leases 20 Boeing 767 freighter aircraft to ASI, including 12 Boeing 767-200 freighter aircraft for a term of five years and eight Boeing 767-300 freighter aircraft for a term of seven years. Under the ATSA, our airline subsidiaries operate those aircraft for an initial term of five years while our LGSTX subsidiary provides gateway services for ASI at certain airports. As of December, 31, 2017, we leased 12 CAM-owned Boeing 767-200 freighter aircraft and eight CAM-owned Boeing 767-300 freighter aircraft to ASI that were operated by our airlines. In conjunction with the execution of the ATSA, the Company and Amazon entered into an Investment Agreement and a Stockholders Agreement, each dated March 8, 2016. The Investment Agreement calls for the Company to issue warrants in three tranches, which will result in Amazon having the right to acquire up to 19.9% of the Company’s outstanding common shares measured as further described below. The exercise price of the warrants is $9.73 per share, which represents the closing price of ATSG’s common shares on February 9, 2016. The first tranche of warrants, issued upon execution of the Investment Agreement, grants Amazon the right to purchase approximately 12.81 million ATSG common shares, all of which are now vested. The second tranche of warrants, which will be issued on March 8, 2018, will give Amazon the right to purchase approximately 1.59 million ATSG common shares, all of which will be vested upon the issuance of the warrants. The third tranche of warrants will be issued on September 8, 2020 and will also vest immediately upon issuance. The third tranche of warrants will grant Amazon the right to purchase such additional number of ATSG common shares as is necessary to bring Amazon’s ownership to 19.9% of the Company’s pre- transaction outstanding common shares measured on a GAAP-diluted basis, adjusted for share issuances and repurchases by the Company following the date of the Investment Agreement, after giving effect to the issuance of the warrants. Each of the three tranches of warrants will be exercisable in accordance with its terms through the fifth anniversary of the date of the Investment Agreement. We anticipate making the common shares underlying the warrants available through a combination of share repurchases and the issuance of additional shares. 2 In December 2016, we acquired Pemco. Pemco provides aircraft maintenance, modification, and engineering services. Pemco is based at the Tampa International Airport where it operates a two-hangar aircraft facility of 311,500 square feet and employs approximately 370 people. Pemco is a leading provider of passenger-to-freighter conversions for Boeing 737-300 and 737-400 aircraft, having redelivered over 50 Boeing 737 converted aircraft to Chinese operators over ten years. Pemco's aircraft conversion capabilities and aircraft hangar operations are marketed with our other air transportation support services. On August 3, 2017, we entered into a joint-venture agreement with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. We anticipate approval of a supplemental type certificate in 2019. We expect to make contributions equal to its 49% ownership percentage of the program's total costs over the next two years. We account for our investment in the joint venture under the equity method of accounting. Financial Information The Company has three reportable segments, "CAM", “ACMI Services" and "Ground Services." Our other business operations, including aircraft maintenance, engineering and modification services; aircraft part sales; ground equipment leasing and maintenance; and mail and package sorting do not constitute reportable segments due to their size. Segment revenues for 2017 are summarized below: CAM ACMI Services Ground Services Other Support Services External revenues (in thousands) $140,434 $614,721 $204,150 $108,895 Customer revenues for 2017 are summarized below. DHL Amazon U.S. Military Other Percent of consolidated revenues 24% 44% 7% 25% Additional financial information about our segments and geographical revenues is presented in Note N to the accompanying consolidated financial statements. Description of Business CAM CAM leases aircraft to ATSG's airlines and to external customers, including DHL and Amazon, usually under multi- year contracts with a schedule of fixed monthly payments. Under a typical lease arrangement, the customer maintains the aircraft in serviceable condition at its own cost. At the end of the lease term, the customer is typically required to return the aircraft in approximately the same maintenance condition that existed at the inception of the lease, as measured by airframe and engine time since the last scheduled maintenance event. CAM examines the credit worthiness of potential customers, their short and long-term growth prospects, their financial condition and backing, the experience of their management, and the impact of governmental regulation when determining the lease rate that is offered to the customer. In addition, CAM monitors the customer’s business and financial status throughout the term of the lease. As of December 31, 2017, CAM’s fleet consisted of 70 serviceable Boeing 767, 757 and 737 cargo aircraft. A complete list of the Company's aircraft is included in Item 2, Properties. Through CAM, we have expanded in recent years the Company's combined fleet of Boeing 767 and 757 aircraft. CAM has managed the modification of passenger aircraft into cargo aircraft as well as purchased previously modified cargo aircraft. Since the beginning of 2015, CAM has deployed 15 Boeing 767-300 and one Boeing 737 aircraft into its fleet. ACMI Services Through the Company's two airline subsidiaries, we provide airline operations to DHL, Amazon, delivery companies, other airlines, freight forwarders and the U.S. Military. A typical operating agreement requires our airline 3 to supply, at a specific rate per block hour and/or per month, a combination of aircraft, crew, maintenance and insurance ("ACMI") for specified cargo operations. The customer is responsible for substantially all other aircraft operating expenses, including fuel, landing fees, parking fees and ground and cargo handling expenses. The airlines also operate charter agreements, including with the U.S. Military, which require the airline to provide full service, including fuel and other operating expenses, in addition to aircraft, crew, maintenance and insurance, for a fixed, all-inclusive price. Our airlines operate medium wide-body aircraft freighters usually on intra-continental flights and medium range inter-continental flights. The airlines typically operate our aircraft in the customers' regional networks that connect to and from global cargo networks. We do not operate larger capacity, long haul inter-continental freighters such as the Boeing 747, 777 or Airbus A380 aircraft. The freighter types we operate have lower investment and ongoing maintenance costs and can operate cost efficiently with smaller loads on shorter routes than the larger capacity freighters. Our airlines provide airlift to the Air Mobility Command ("AMC") through contracts awarded by the U.S. Transportation Command ("USTC"), both of which are organized under the U.S. Military. ATI contracts with the AMC for the operation of its unique fleet of four Boeing 757 "combi" aircraft, which are capable of simultaneously carrying passengers and cargo containers on the main flight deck. ATI has been operating combi aircraft for the U.S. Military since 1993. In January 2018, the USTC contracted with ATI to provide combi aircraft operations through December 2021 and awarded ATI three international routes for combi aircraft for 2018. These routes are not based on or related to conflicts in the Middle East. Our airlines participate in the Department of Defense ("DOD") Civil Reserve Air Fleet ("CRAF") program which entitles our airlines to bid for military cargo charter operations. Our airlines may operate temporary "expansion" routes for the U.S Military using the Boeing 757 combi and Boeing 767 freighter aircraft. Our participation in the CRAF program allows the DOD to requisition specified aircraft for military use during a national defense emergency. Approximately 5% of the Company's consolidated revenues for 2017 were derived from providing airline operations for customers other than DHL, Amazon and the U.S. Military. These ACMI and charter operations are typically provided to delivery companies, freight forwarders or other airlines. Demand for air cargo services correlates closely with general economic conditions and the level of commercial activity in a geographic area. Stronger general economic conditions and growth in a region typically increase the need for product transportation. Historically, the cargo industry has experienced higher volumes during the fourth calendar quarter of each year due to increased shipments during the holiday season. Generally, time-critical delivery needs, such as just-in-time inventory management, increase the demand for air cargo delivery, while higher costs of aviation fuel generally reduces the demand for air delivery services. When aviation fuel prices increase, shippers will consider using ground transportation if the delivery time allows. We have limited exposure to fluctuations in the price of aviation fuel under contracts with our customers. DHL, like most of our ACMI customers, procures the aircraft fuel and fueling services necessary for their flights. Our charter agreements with the U.S. Military are based on a preset pegged fuel price and include a subsequent true-up to the actual fuel prices. Aircraft Maintenance and Modification Services We provide aircraft maintenance and modification services to other air carriers through our ABX, AMES and Pemco subsidiaries. These subsidiaries have technical expertise related to aircraft modifications through a long history in aviation. They own many Supplemental Type Certificates (“STCs”). An STC is granted by the FAA and represents an ownership right, similar to an intellectual property right, which authorizes the alteration of an airframe, engine or component. We market our subsidiaries capabilities by identifying aviation-related maintenance and modification opportunities and matching them to customer needs. AMES operates a Federal Aviation Administration (“FAA”) certificated 145 repair station in Wilmington, Ohio, including hangars, a component shop and engineering capabilities. AMES is AS9100 quality certified for the aerospace industry. AMES’ marketable capabilities include the installation of avionics systems and flat panel displays for Boeing 757 and 767 aircraft. In 2014, the Company completed the construction of a new hangar facility, bringing the total hangar square footage to 310,000. The hangar provides the capability of servicing airframes as large as the Boeing 747-400 and the Boeing 777 aircraft. AMES has the capability to perform line maintenance and airframe maintenance 4 on McDonnell Douglas MD-80, Boeing 767, 757, 737, 777, 727 and Airbus A320 aircraft. AMES also has the capability to refurbish airframe components, including approximately 60% of the components utilized by Boeing 767 aircraft. Pemco operates an FAA certificated 145 repair station from a two hangar facility in Tampa, Florida. Pemco has the capability to perform airframe maintenance on Boeing 767, 757, 737, McDonnell Douglas MD-80, Airbus A320, A321 and various regional jet model aircraft. Pemco also has the capability to perform aircraft modification and engineering services, including passenger-to-freighter and passenger-to-combi conversions for Boeing 737-200, Boeing 737-300 and Boeing 737-400 series aircraft. AMS is an Aviation Suppliers Association, ASA 100 Accredited reseller and broker of aircraft parts. AMS carries an inventory of Boeing 767, 757, 737 and DC-9 spare parts and also maintains inventory on consignment from original equipment manufacturers, resellers, lessors and other airlines. AMS's customers include the commercial air cargo industry, passenger airlines, aircraft manufacturers and contract maintenance companies serving the commercial aviation industry, as well as other resellers. Ground Services We have provided mail sorting services under contracts with the USPS since September 2004. We provide labor, equipment maintenance and facility management at USPS mail sort centers in Indianapolis, Dallas and Memphis. Under each of these three contracts, we are compensated at a firm price for fixed costs and an additional amount based on the volume of mail handled at each sort center. LGSTX also provides labor for load transfer services to the USPS at two facilities. The contracts for the five facilities we service have been extended from their original expiration dates and are currently scheduled to expire during September 2018. We understand the USPS is evaluating alternatives for these facilities. The contract for some or all of these may not be renewed. LGSTX also arranges similar services to support ASI at certain locations in the U.S. ASI can terminate these services at one or any location after giving a brief notice period. Additionally LGSTX provides international mail forwarding services through the John F. Kennedy International Airport and the O'Hare International Airport. LGSTX also provides maintenance services for material handling and sorting equipment as well as ground support equipment throughout the U.S. LGSTX has a large inventory of ground support equipment, such as power units, airstarts, deicers and pushback vehicles that it rents to airports, ground handlers, airlines and other customers. LGSTX is also licensed to resell aircraft fuel. Flight Support ABX is FAA certificated to offer flight crew training to customers and rent usage of its flight simulators for outside training programs. ABX has three flight simulators. The Boeing 767 and DC-9 level C simulators allow ABX to qualify flight crewmembers under FAA requirements without performing check flights in an aircraft. The Company's subsidiary, Global Flight Source, Inc. ("GFS"), provides aircraft dispatch and flight monitoring to ABX and ATI. GFS can provide these services to U.S certificated supplemental air carriers and foreign air carriers. Competitive Conditions Our airline subsidiaries compete with other cargo airlines to place aircraft under ACMI arrangements and charter contracts. Other cargo airlines include Amerijet International, Inc., Atlas Air Worldwide Holdings, Inc., Kalitta Air LLC, Northern Air Cargo, and National Air Cargo Group, Inc. The primary competitive factors in the air cargo industry are operating costs, fuel efficiency, geographic coverage, aircraft range, aircraft reliability and capacity. The cost of airline operations is significantly impacted by the cost of flight crewmembers, which can vary among airlines depending on their collective bargaining agreements. Cargo airlines also compete for cargo volumes with passenger airlines that have substantial belly cargo capacity. The air cargo industry is capital intensive and highly competitive, especially during periods of excess capacity of aircraft compared to cargo volumes. The scheduled delivery industry is dominated by integrated door-to-door delivery companies including DHL, the USPS, FedEx Corporation, United Parcel Service, Inc. and ASI. Although the volume of our business is impacted by competition among these integrated carriers, we do not usually compete directly with them. Competition for aircraft lease placements is generally affected by aircraft type, aircraft availability and lease rates. We target our leases to cargo airlines and delivery companies seeking medium widebody airlift. The Airbus A300-600 5 and A330 aircraft can provide capabilities similar to the Boeing 767 for medium widebody airlift. Competitors in the aircraft leasing markets include GE Capital Aviation Services and Altavair Aviation Leasing, among others. The aircraft maintenance industry is labor intensive and typically competes based on cost, capabilities and reputation for quality. U.S. airlines may contract for aircraft maintenance with maintenance and repair organizations ("MROs") in other countries or geographies with a lower labor wage base, making the industry highly cost competitive. Other aircraft MROs include AAR Corp and Hong Kong Aircraft Engineering Co. Airline Operations Flight Operations and Control Each of the Company's airline operations are conducted pursuant to authority granted to them by the FAA and the Department of Transportation ("DOT"). Airline flight operations, including aircraft dispatching, flight tracking, crew training and crew scheduling are planned and controlled by personnel within each airline. The Company staffs aircraft dispatching and flight tracking 24 hours per day, 7 days per week. The FAA prescribes the requirements, methods and means by which air carrier flight operations are conducted, including but not limited to the qualifications and training of flight crew members, the release of aircraft for flight, the tracking of flights, the time crew members can be on duty, aircraft operating procedures, proper navigation of aircraft, compliance with air traffic control instructions and other operational functions. Aircraft Maintenance Our airlines’ operations are regulated by the FAA for aircraft safety and maintenance. Each airline performs routine inspections and airframe maintenance in accordance with applicable FAA-approved aircraft maintenance programs. In addition, the airlines build into their maintenance programs FAA-mandated Airworthiness Directive and manufacturer Service Bulletin compliance on all of their aircraft. The airlines’ maintenance and engineering personnel coordinate routine and non-routine maintenance requirements. Each airline’s maintenance program includes tracking the maintenance status of each aircraft, consulting with manufacturers and suppliers about procedures to correct irregularities and training maintenance personnel on the requirements of its FAA-approved maintenance program. The airlines contract with MROs, including AMES and Pemco, to perform heavy maintenance on airframes and engines. Each airline owns and maintains an inventory of spare aircraft engines, auxiliary power units, aircraft parts and consumable items. The quantity of spare items maintained is based on the fleet size, engine type operated and the reliability history of the item types. Security The Transportation Security Administration (“TSA”) requires our air carriers to comply with security protocols as set out in each carrier’s standard all-cargo aircraft operator security plan containing extensive security practices and procedures that must be followed. The security plan provides for the conducting of background checks on those with access to cargo and/or aircraft, the securing of the aircraft while on the ground, the acceptance and screening of cargo to be moved by air, the handling of suspicious cargo and the securing of cargo ground facilities, among other requirements. Comprehensive internal audit and evaluation programs are actively mandated and maintained. Customers are required to inform the airlines in writing of the nature and composition of any freight which is classified as "Hazardous Materials" and “Dangerous Goods” by the DOT. Notwithstanding these procedures, our airline subsidiaries could unknowingly transport contraband or undeclared hazardous materials for customers, which could result in fines and penalties and possible damage to the aircraft. Insurance Our airline subsidiaries are required by the DOT to carry a minimum amount of aircraft liability insurance. Their aircraft leases, loan agreements and ACMI agreements also require them to carry such insurance. The Company currently maintains public liability and property damage insurance, and our airline subsidiaries currently maintain aircraft hull and liability insurance and war risk insurance for their respective aircraft fleets in amounts consistent with industry standards. CAM’s customers are also required to maintain similar insurance coverage. Employees 6 As of December 31, 2017, the Company had approximately 3,010 full-time and part-time employees. The Company employed approximately 485 flight crewmembers, 1,415 aircraft maintenance technicians and flight support personnel, 685 warehousing, sorting and logistics personnel, 165 employees for airport maintenance and logistics, 35 employees for sales and marketing and 225 employees for administrative functions. In addition to full time and part time employees, the Company typically has approximately 400 temporary employees mainly serving the USPS operations and aircraft line maintenance operations. On December 31, 2016, the Company had approximately 3,230 full-time and part-time employees. Labor Agreements The Company’s flight crewmembers are unionized employees. The table below summarizes the representation of the Company’s flight crewmembers at December 31, 2017. Airline ABX ATI ATI Labor Agreement Unit International Brotherhood of Teamsters Air Line Pilots Association Association of Flight Attendants Contract Amendable Date 12/31/2014 5/28/2014 11/14/2023 Percentage of the Company’s Employees 8.4% 7.6% 1.3% Under the Railway Labor Act (“RLA”), as amended, the crewmember labor agreements do not expire, so the existing contract remains in effect throughout any negotiation process. If required, mediation under the RLA is conducted by the National Mediation Board, which has the sole discretion as to how long mediation can last and when it will end. In addition to direct negotiations and mediation, the RLA includes a provision for potential arbitration of unresolved issues and a 30-day “cooling-off” period before either party can resort to self-help, including, but not limited to, a work stoppage. Training The flight crewmembers are required to be licensed in accordance with Federal Aviation Regulations (“FARs”), with specific ratings for the aircraft type to be flown, and to be medically certified as physically fit to operate aircraft. Licenses and medical certifications are subject to recurrent requirements as set forth in the FARs, to include recurrent training and minimum amounts of recent flying experience. The FAA mandates initial and recurrent training for most flight, maintenance and engineering personnel. Mechanics and quality control inspectors must also be licensed and qualified to perform maintenance on Company operated and maintained aircraft. Our airline subsidiaries pay for all of the recurrent training required for their flight crewmembers and provide training for their ground service and maintenance personnel. Their training programs have received all required FAA approvals. Similarly, our flight dispatchers and flight followers receive FAA approved training on the airlines' requirements and specific aircraft. Intellectual Property The Company owns many STCs issued by the FAA. The Company uses these STCs mainly in support of its own fleets; however, AMES and Pemco have marketed certain STCs to other airlines. Information Systems We are dependent on technology to conduct our daily operations including data processing, communications and regulatory compliance. We rely on critical computerized systems for aircraft maintenance records, flight planning, crew scheduling, employee training, financial records and other processes. We utilize information systems to maintain records about the maintenance status and history of each major aircraft component, as required by FAA regulations. Using the systems, we track maintenance schedules and also control inventories and maintenance tasks, including the work directives of personnel performing those tasks. We rely on information systems to track crewmember flight and duty times, and crewmember training status. The Company’s flight operations systems coordinate flight schedules and crew schedules. 7 We invest significant time and financial resources to acquire, develop and maintain information systems to facilitate our operations. We rely increasing on third party applications and hosted technologies. To remain competitive we must continue to deploy new technologies while controlling its costs and maintaining regulatory compliance. Regulation Our subsidiaries’ airline operations are primarily regulated by the DOT, the FAA and the TSA. Those operations must comply with numerous economic, safety, security and environmental laws, ordinances and regulations. In addition, they must also comply with various other federal, state, local and foreign laws and regulations. Environment The U.S. Environmental Protection Agency ("EPA") is authorized to regulate aircraft emissions and has historically implemented emissions control standards adopted by the International Civil Aviation Organization ("ICAO"). In 2016, however, the EPA issued a finding on greenhouse gas ("GHG") emissions from aircraft and its relationship to air pollution. This finding is a regulatory prerequisite to the EPA’s adoption of a new certification standard for aircraft emissions. Our subsidiaries’ aircraft currently meet all known requirements for engine emission levels as applicable by engine design date. Under the Clean Air Act, individual states or the EPA may adopt regulations requiring reductions in emissions for one or more localities based on the measured air quality at such localities. These regulations may seek to limit or restrict emissions by restricting the use of emission-producing ground service equipment or aircraft auxiliary power units. Further, the U.S. Congress has, in the past, considered legislation that would regulate GHG emissions, and some form of federal climate change legislation is possible in the future. In addition, the European Commission has approved the extension of the European Union Emissions Trading Scheme ("ETS") for GHG emissions to the airline industry. Currently, under the European Union’s ETS, all ABX and ATI flights that are wholly within the European Union are covered by the ETS requirements, and each year our airlines are required to submit emission allowances in an amount equal to the carbon dioxide emissions from such flights. If the airline's flight activity during the year produced carbon emissions exceeding the number of carbon emissions allowances that it had been awarded, the airline must acquire allowances from other airlines in the open market. ABX and ATI operate intra-EU flights from time to time and management believes that such flights are operated in compliance with ETS requirements. Similarly, in 2016, the ICAO passed a resolution adopting the Carbon Offsetting and Reduction Scheme for International Aviation (“CORSIA”), which is a global, market-based emissions offset program to encourage carbon- neutral growth beyond 2020. A pilot phase is scheduled to begin in 2021 in which countries may voluntarily participate, and full mandatory participation is scheduled to begin in 2027. ICAO continues to develop details regarding implementation, but compliance with CORSIA will increase our operating costs. The federal government generally regulates aircraft engine noise at its source. However, local airport operators may, under certain circumstances, regulate airport operations based on aircraft noise considerations. The Airport Noise and Capacity Act of 1990 provides that, in the case of Stage 3 aircraft (all of our operating aircraft satisfy Stage 3 noise compliance requirements), an airport operator must obtain the carriers’ consent to, or the government’s approval of, the rule prior to its adoption. We believe the operation of our airline subsidiaries’ aircraft either complies with or is exempt from compliance with currently applicable local airport rules. However, some airport authorities have adopted local noise regulations, and, to the extent more stringent aircraft operating regulations are adopted on a widespread basis, our airline subsidiaries may be required to spend substantial funds, make schedule changes or take other actions to comply with such local rules. Department of Transportation The DOT maintains authority over certain aspects of domestic air transportation, such as requiring a minimum level of insurance and the requirement that a person be “fit” to hold a certificate to engage in air transportation. In addition, the DOT continues to regulate many aspects of international aviation, including the award of international routes. The DOT has issued ABX a Domestic All-Cargo Air Service Certificate for air cargo transportation between all points within the U.S., the District of Columbia, Puerto Rico, and the U.S. Virgin Islands. The DOT has issued ATI certificate authority to engage in scheduled interstate air transportation, which is currently limited to all-cargo operations. ATI's DOT 8 certificate authority also authorizes it to engage in interstate and foreign charter air transportation of persons, property and mail. Additionally, the DOT has issued ABX and ATI Certificates of Public Convenience and Necessity authorizing each of them to engage in scheduled foreign air transportation of cargo and mail between the U.S. and all current and future U.S. open-skies partner countries, which currently consists of more than 120 foreign countries. ABX also holds exemption authorities issued by the DOT to conduct scheduled all-cargo operations between the U.S. and certain foreign countries with which the U.S. does not have an open-skies air transportation agreement. By maintaining these certificates, the Company, through its airline subsidiaries, can conduct all-cargo charter operations worldwide subject to the receipt of any necessary foreign government approvals. Prior to issuing such certificates, and periodically thereafter, the DOT examines a company’s managerial competence, financial resources and plans, compliance disposition and citizenship in order to determine whether the carrier is fit, willing and able to engage in the transportation services it has proposed to and does undertake. The DOT has the authority to impose civil penalties, or to modify, suspend or revoke our certificates and exemption authorities for cause, including failure to comply with federal laws or DOT regulations. A corporation holding the above-referenced certificates and exemption authorities must qualify as a citizen of the United States, which, pursuant to federal law, requires that (1) it be organized under the laws of the U.S. or a state, territory or possession thereof, (2) that its president and at least two-thirds of its Board of Directors and other managing officers be U.S. citizens, (3) that less than 25% of its voting interest be owned or controlled by non-U.S. citizens, and (4) that it not otherwise be subject to foreign control. We believe our airline subsidiaries possess all necessary DOT-issued certificates and authorities to conduct our current operations and each continue to qualify as a citizen of the United States. Federal Aviation Administration The FAA regulates aircraft safety and flight operations generally, including equipment, ground facilities, maintenance, flight dispatch, training, communications, the carriage of hazardous materials and other matters affecting air safety. The FAA issues operating certificates and detailed "operations specifications" to carriers that possess the technical competence to conduct air carrier operations. In addition, the FAA issues certificates of airworthiness to each aircraft that meets the requirements for aircraft design and maintenance. ABX and ATI believe they hold all airworthiness and other FAA certificates and authorities required for the conduct of their business and the operation of their aircraft, although the FAA has the power to suspend, modify or revoke such certificates for cause, or to impose civil penalties for any failure to comply with federal laws and FAA regulations. The FAA has the authority to issue regulations, airworthiness directives and other mandatory orders relating to, among other things, the inspection, maintenance and modification of aircraft and the replacement of aircraft structures, components and parts, based on industry safety findings, the age of the aircraft and other factors. For example, the FAA has required ABX to perform inspections of its Boeing 767 aircraft to determine if certain of the aircraft structures and components meet all aircraft certification requirements. If the FAA were to determine that the aircraft structures or components are not adequate, it could order operators to take certain actions, including but not limited to, grounding aircraft, reducing cargo loads, strengthening any structure or component shown to be inadequate, or making other modifications to the aircraft. New mandatory directives could also be issued requiring the Company’s airline subsidiaries to inspect and replace aircraft components based on their age or condition. As a routine matter, the FAA issues airworthiness directives applicable to the aircraft operated by our airline subsidiaries, and our airlines comply, sometimes at considerable cost, as part of their aircraft maintenance program. In addition to the FAA practice of issuing regulations and airworthiness directives as conditions warrant, the FAA has adopted new regulations to address issues involving aging, but still economically viable, aircraft on a more systematic basis. FAA regulations mandate that aircraft manufacturers establish aircraft limits of validity and service action requirements based on aircraft flight cycles and flight hours before which widespread fatigue damage might occur. Service action requirements include inspections and modifications to preclude development of widespread fatigue damage in specific aircraft structural areas. The Boeing Company has provided its recommendations of the limits of validity to the FAA, and the FAA has now approved the limits for the Boeing 757 and 767 model aircraft. Consequently, after the limit of validity is reached for a particular model aircraft, air carriers will be unable to continue to operate the aircraft without the FAA first granting an extension of time to the operator. There can be no assurance that the FAA would extend the deadline, if one were to be requested. For the oldest aircraft in our fleets, we estimate the limit of validity would not be reached for at least 20 years. 9 The FAA requires each of the airline subsidiaries to implement a drug and alcohol testing program with respect to all employees and, unless already subject to testing, contractor employees that engage in safety sensitive functions. Each of the airlines complies with these regulations. Transportation Security Administration The TSA, an administration within the Department of Homeland Security, is responsible for the screening of passengers, baggage and cargo and the security of aircraft and airports. Our airline subsidiaries comply with all applicable aircraft and cargo security requirements. The TSA has adopted cargo security-related rules that have imposed additional burdens on our airlines and our customers. Among other things, the TSA requires each airline to perform criminal history background checks on all employees. In addition, we may be required to reimburse the TSA for the cost of security services it may provide to the Company’s airline subsidiaries in the future. International Regulations When operating in other countries, our airlines are subject to aviation agreements between the U.S. and the respective countries or, in the absence of such an agreement, by principles of reciprocity. International aviation agreements are periodically subject to renegotiation, and changes in U.S. or foreign governments could result in the alteration or termination of the agreements affecting our international operations. Commercial arrangements such as ACMI agreements between our airlines and our customers in other countries, may require the approval of foreign governmental authorities. Foreign authorities may limit or restrict the use of our aircraft in certain countries. Also, foreign government authorities often require licensing and business registration before beginning operations. Other Regulations Various regulatory authorities have jurisdiction over significant aspects of our business, and it is possible that new laws or regulations or changes in existing laws or regulations or the interpretations thereof could have a material adverse effect on our operations. In addition to the above, other laws and regulations to which we are subject, and the agencies responsible for compliance with such laws and regulations, include the following: • • • • • • The labor relations of our airline subsidiaries are generally regulated under the Railway Labor Act, which vests in the National Mediation Board certain regulatory powers with respect to disputes between airlines and labor unions arising under collective bargaining agreements; The Federal Communications Commission regulates our airline subsidiaries’ use of radio facilities pursuant to the Federal Communications Act of 1934, as amended; U.S. Customs and Border Protection issues landing rights and inspects cargo imported from our subsidiaries’ international operations; Our airlines must comply with U.S. Citizenship and Immigration Services regulations regarding the citizenship of our employees; The Company and its subsidiaries must comply with wage, work conditions and other regulations of the Department of Labor regarding our employees. The Office of Foreign Assets Control (OFAC) of the U.S. Department of the Treasury and other government agencies administer and enforce economic and trade sanctions based on U.S. foreign policy, which may limit our business activities in and for certain areas. Executive Officers of the Registrant Information about executive officers of the Company is provided in Item 10. Directors, Executive Officers and Corporate Governance, of this report, and is incorporated in this item by reference. Available Information Our filings with the Securities and Exchange Commission ("SEC"), including annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to these reports, are available free of charge from our website at www.atsginc.com as soon as reasonably practicable after filing with the SEC. The SEC maintains an 10 Internet site that contains reports, proxy and information statements and other information regarding Air Transport Services Group, Inc. at www.sec.gov. ITEM 1A. RISK FACTORS The risks described below could adversely affect our financial condition or results of operations. The risks below are not the only risks that the Company faces. Additional risks that are currently unknown to us or that we currently consider immaterial or unlikely could also adversely affect the Company. The economic conditions in the U.S. and in other markets may negatively impact the demand for the Company’s aircraft and services. Air cargo transportation volumes are strongly correlated to general economic conditions, including the price of aviation fuel. An economic downturn could reduce the demand for delivery services offered by DHL, Amazon and other delivery businesses, in particular expedited shipping services utilizing aircraft. Further, during an economic slowdown, customers generally prefer to use ground-based or marine transportation services instead of more expensive air transportation services. Accordingly, an economic downturn could reduce the demand for airlift and cargo aircraft leases. Additionally, if the price of aviation fuel rises significantly, the demand for cargo aircraft and air transportation services may decline. During periods of downward economic trends and rising fuel costs, freight forwarders and integrated delivery businesses are more likely to defer market expansion plans. As a result, we may experience delays in the deployment of available aircraft with customers under lease, ACMI or charter arrangements. Our costs incurred in providing airline services could be more than the contractual revenues generated. Each airline develops business proposals for ACMI, charters, DHL, ASI and other operating contracts by projecting operating costs, crew productivity and maintenance expenses. Projections contain key assumptions, including maintenance costs, flight hours, aircraft reliability, crewmember productivity and crewmember compensation and benefits. We may overestimate revenues, the level of crewmember productivity, and/or underestimate the actual costs of providing services when preparing business proposals. If actual costs are higher than projected or aircraft reliability is less than expected, future operating results may be negatively impacted. The Company’s airlines rely on flight crews that are unionized. If collective bargaining agreements increase our costs and we cannot recover such increases, our operating results would be negatively impacted. It may be necessary for us to terminate customer contracts or curtail planned growth. Our operating results could be adversely impacted by negotiations regarding collective bargaining agreements with flight crewmember representatives. The flight crewmembers for each of the Company's airlines are unionized. ABX's crewmembers are represented by the International Brotherhood of Teamsters ("IBT") while ATI's crewmembers are represented by the Air Line Pilots Association ("ALPA"). The collective bargaining agreement ("CBA") between ABX and IBT and between ATI and ALPA are both currently amendable and the respective parties are each in the process of renegotiating the terms of their CBA. The airline and the union are each required to maintain the status quo during the renegotiation of the CBA; neither the airline nor the union may engage in a lock-out, strike or other self-help until such time as they are released from further negotiations by the mediator for the National Mediation Board ("NMB"), and after the conclusion of a mandatory 30-day “cooling off” period. It is rare for mediators to declare an impasse and release the parties. Instead, the NMB prefers to require the parties to remain in negotiations until such time as they come to an agreement. Despite this process, it's possible for disruptions in customer service to occur from time to time, resulting in increased costs for the airline and monetary penalties under certain customer agreements if monthly reliability thresholds are not achieved. Further, if we do not maintain minimum reliability thresholds over an extended period of time, we could be found in default of a customer agreement. Contract negotiations with the union could result in reduced flexibility for scheduling crewmembers and higher operating costs for the airlines, making the Company's airlines less competitive than other airlines. The NMB ruled, during 2017, that ABX and ATI do not constitute a single transportation system for the purposes of collective bargaining. The NMB could reconsider whether the airlines constitute a single transportation system and require that the ABX and ATI crewmembers be represented by the same union. A single transportation system 11 determination by the NMB could give rise to complex contractual issues, including integrating the airlines' seniority lists, and materially impact the dynamics with respect to future CBA negotiations. While it is unlikely that the NMB would reconsider or find that ABX and ATI constitute a single transportation system, the case-by-case analysis used by the NMB makes such predictions uncertain. The rate of aircraft deployments may impact the Company’s operating results and financial condition. The Company's future operating results and financial condition will depend in part on our subsidiaries’ ability to successfully deploy aircraft in customers' operations while generating a positive return on investment. Our success will depend, in part, on our customers' ability to secure additional cargo volumes, in both U.S. and international markets. Deploying aircraft in international markets can pose additional risks, costs and regulatory requirements which could result in periods of delayed deployments. The actual demand for Boeing 767, 757 and 737 aircraft may be less than we anticipate. The actual lease rates for aircraft available for lease may be less than we projected, or new leases may start later than we expect. Further, other airlines and lessors may be willing to offer aircraft to the market under terms more favorable to lessees. We may fail to meet the scheduled delivery date for aircraft required by customer agreements. If CAM cannot meet the agreed delivery schedule for an aircraft lease, the customer may have the right to cancel the aircraft lease, thus delaying revenues until the aircraft can be completed and re-marketed successfully. Our airline operating agreements include on-time reliability requirements which can impact the Company's operating results and financial condition. Certain of our airline operating agreements contain monthly incentive payments for reaching specific on-time reliability thresholds. Additionally, such airline operating agreements contain monetary penalties for aircraft reliability below certain thresholds. As a result, our operating revenues may vary from period to period depending on the achievement of monthly incentives or the imposition of penalties. Further, an airline could be found in default of an agreement if it does not maintain minimum thresholds over an extended period of time. If our airlines are placed in default due to the failure to maintain reliability thresholds, the customer may elect to terminate all or part of the services we provide under certain customer agreements after a cure period. If ABX fails to maintain aircraft reliability above a minimum threshold under the restated CMI agreement for two consecutive calendar months or three months in a rolling twelve month period, we would be in default of the restated CMI agreement with DHL. In that event, DHL may elect to terminate the restated CMI agreement, unless we maintain the minimum reliability threshold during a 60-day cure period. If DHL terminates the CMI agreement due to an ABX event of default, we would be subject to a monetary penalty payable to DHL. If our airlines fail to maintain aircraft reliability above a minimum threshold under the ATSA for either a specified number of consecutive calendar months or a specified number of calendar months (whether or not consecutive) in a specified trailing period, we could be held in default. In that event, ASI may elect to terminate the ATSA and pursue those rights and remedies available to it at law or in equity. The anticipated strategic and financial benefits of our relationship with Amazon may not be realized. We entered into the agreements with Amazon with the expectation that the transactions would result in various benefits including, among others, growth in revenues, improved cash flows and operating efficiencies. Achieving the anticipated benefits from the agreements is subject to a number of challenges and uncertainties, such as unforeseen costs. If we are unable to achieve our objectives the expected benefits may be only partially realized or not at all, or may take longer to realize than expected, which could adversely impact our financial condition and results of operations. The Company's future earnings and earnings per share, as reported under generally accepted accounting principles, will be impacted by the Amazon stock warrants. We expect that the warrants issuable to Amazon will increase the number of diluted shares reported. As of December 31, 2017, the Company's liabilities reflected 14.83 million stock warrants issued to Amazon. Further, the warrants are subject to fair value measurements during periods that they are outstanding. Accordingly, future fluctuations in the fair value of the warrants may adversely impact the Company's reported earnings measures. 12 Changes in the fair value of certain financial instruments could impact the financial results of the Company. Certain financial instruments are subject to fair value measurements at the end of each reporting period. Accordingly, future fluctuations in their fair value may adversely impact the Company's reported earnings. See Note D in the accompanying consolidated financial statements for further information about the fair value of our financial instruments. The convertible note hedge transactions and the warrant transactions that we entered into in September 2017 may affect the value of our common stock. In connection with the pricing of our 1.125% senior convertible notes due 2024 (the "Notes") and the exercise by the initial purchasers of their option to purchase additional Notes, we entered into privately-negotiated convertible note hedge transactions with the hedge counterparties. The convertible note hedge transactions cover, subject to customary anti-dilution adjustments, the number of shares of common stock that initially underlie the Notes. We also entered into separate, privately-negotiated warrant transactions with the hedge counterparties relating to the same number of shares of our common stock that initially underlie the Notes, subject to customary anti-dilution adjustments. The hedge counterparties and/or their affiliates may modify their hedge positions with respect to the convertible note hedge transactions and the warrant transactions from time to time after the pricing of the Notes. They may do so by purchasing and/or selling shares of our common stock and/or other securities of ours, including the Notes in privately- negotiated transactions and/or open-market transactions or by entering into and/or unwinding various over-the-counter derivative transactions with respect to our common stock. The hedge counterparties are likely to modify their hedge positions during any observation period for the Notes. The effect, if any, of these activities on the market price of our common stock will depend on a variety of factors, including market conditions, and cannot be determined at this time. Any of these activities could, however, adversely affect the market price of our common stock. In addition, the hedge counterparties and/or their affiliates may choose to engage in, or to discontinue engaging in, any of these transactions with or without notice at any time, and their decisions will be at their sole discretion and not within our control. We are subject to counterparty risk with respect to the convertible note hedge transactions. The hedge counterparties are financial institutions, and we will be subject to the risk that they might default under the convertible note hedge transactions. Our exposure to the credit risk of the hedge counterparties is unsecured by any collateral. Global economic conditions have from time to time resulted in failure or financial difficulties for many financial institutions. If a hedge counterparty becomes subject to insolvency proceedings, we will become an unsecured creditor in those proceedings with a claim equal to our exposure at that time under our transactions with that hedge counterparty. Our exposure will depend on many factors but, generally, the increase in our exposure will be correlated to the increase in the market price and volatility of our common stock. In addition, upon a default by a hedge counterparty, we may suffer adverse tax consequences and more dilution than we currently anticipate with respect to our common stock. We can provide no assurances as to the financial stability or viability of any hedge counterparty. Conversion of the Notes or exercise of the warrants may dilute the ownership interest of stockholders. Any sales in the public market of the common stock issuable upon such conversion of the Notes or such exercise of the warrants could adversely affect prevailing market prices of our common stock. In addition, the existence of the Notes may encourage short selling by market participants because the conversion of the Notes could depress the price of our common stock. Under the provisions of airline operating and aircraft lease agreements with customers, customers may be able to terminate the operating agreements or aircraft lease agreements, subject to early termination provisions. Customers can typically terminate one or more of the aircraft from their related airline operating agreement for convenience at any time during the term, subject to a 60 day notice period and paying the Company a fee. Additionally, the lease agreements may contain provisions for terminating an aircraft lease for convenience, including a notice period and paying a lump sum amount to the Company. Amazon may terminate the ATSA in its entirety after providing 180 days of advance notice after the first six months of the term and paying to the Company a significant termination fee which reduces after the second anniversary of the ATSA. DHL may terminate the restated CMI agreement in its entirety after providing 180 days of advance notice after the first six months of the term and paying a significant termination fee which amortizes down during the term. 13 The U.S. Military may not renew our contracts or may reduce the number of routes that we operate. Our contracts with the U.S. Military are typically for one year and are not required to be renewed. The U.S. Military may terminate the contracts for convenience or in the event we were to fail to satisfy reliability requirements or for other reasons. The number and frequency of routes is sensitive to changes in military priorities and U.S. defense budgets. Our business could be negatively impacted by adverse audit findings by the U.S. Government. Our U.S. Military contracts are subject to audit by government agencies, including with respect to performance, costs, internal controls and compliance with applicable laws and regulations. If an audit uncovers improprieties, we may be subject to civil or criminal penalties, including termination of such contracts, forfeiture of profits, fines and suspension from doing business with the U.S. Military. Our participation in the CRAF Program could adversely restrict our commercial business in times of national emergency. Both of our air carriers participate in the U.S. Civil Reserve Air Fleet (“CRAF”) Program, which permits the U.S. Department of Defense to utilize participants’ aircraft during national emergencies when the need for military airlift exceeds the capability of military aircraft. Proposed rules from the DOT, FAA and TSA could increase the Company's operating costs and reduce customer utilization of airfreight. New FAA rules for Flightcrew Member Duty and Rest Requirements (FMDRR) for passenger airline operations became effective in January 2014. The new rules apply to our operation of combi aircraft for the U.S military and impact the required amount and timing of rest periods for pilots between work assignments and modified duty and rest requirements based on the time of day, number of scheduled segments, flight types, time zones and other factors. Failure to remain in compliance with these rules may subject us to fines or other enforcement action. There are separate crew rest requirements applicable to all-cargo aircraft of the type operated by the Company. The FAA has rejected, as have the Courts, an attempt to apply the passenger airline operations to all cargo operations. If such rest requirements and restrictions were imposed on our cargo operations, these rules could have a significant impact on the costs incurred by our airlines. The airlines would attempt to pass such additional costs through to their customers in the form of price increases. Customers, as a result, may seek to reduce their utilization of aircraft in favor of less expensive transportation alternatives. The concentration of aircraft types and engines in the Company's airlines could adversely affect our operating and financial results. The combined aircraft fleet is concentrated in two aircraft types. If any of these aircraft types encounter technical difficulties that resulted in significant FAA airworthiness directives or grounding, our ability to lease the aircraft would be adversely impacted, as would our airlines' operations. The market growth in demand for the Boeing 767 and 757 aircraft types and configurations may be less than we anticipate. Customers may develop preferences for the Airbus A300-600 and A330 aircraft or other mid-size aircraft types, instead of the Boeing 767 and 757 aircraft. The cost of aircraft repairs and unexpected delays in the time required to complete aircraft maintenance could negatively affect our operating results. Our aircraft provide ACMI services throughout the world, sometimes operating in remote regions. Our aircraft may experience maintenance events in locations that do not have the necessary repair capabilities or are difficult to reach. As a result, we may incur additional expenses and lose billable revenues that we would have otherwise earned. Under certain customer agreements, we are required to provide a spare aircraft while scheduled maintenance is completed. If delays occur in the completion of aircraft maintenance, we may incur additional expense to provide airlift capacity and forgo revenues. Lessees of our aircraft may fail to make contractual payments or fail to maintain the aircraft as required. Our financial results depend on our lease customers' ability to make lease payments and maintain the related aircraft. Our customers' ability to make payments could be adversely impacted by changes to their financial liquidity, competitiveness, economic conditions and other factors. A default of an aircraft lease by a customer could negatively impact our operating results and cash flows and result in the repossession of aircraft. 14 While we often require leasing customers to pay monthly maintenance deposits, customers are normally responsible for maintaining our aircraft during the lease term. Failure of a customer to perform required maintenance and maintain the appropriate records during the lease term could result in higher maintenance costs, a decrease in the value of the aircraft, a lengthy delay in or even our inability to place the aircraft in a subsequent lease, any of which could have an adverse effect on our results of operations and financial condition. We rely on third parties to modify aircraft and provide aircraft and engine maintenance. We rely on certain third party aircraft modification service providers and aircraft and engine maintenance service providers that have expertise or resources that we do not have. Third party service providers may seek to impose price increases that could negatively affect our competitiveness in the airline markets. An unexpected termination or delay involving service providers could have a material adverse effect on our operations and financial results. A delay in an aircraft modification could adversely impact our revenues and our ability to place the aircraft in the market. We must manage third party service providers to meet schedules and turn-times and to control costs in order to remain competitive to our customers. Delta TechOps, a division of Delta Airlines, Inc., is the primary engine maintenance provider for the Company's General Electric CF6 engines that power our fleet of Boeing 767 aircraft. If Delta TechOps does not complete the refurbishment of our engines within the contractual turn-times or if we must replace Delta TechOps as the maintenance provider for some or all of the Company's CF6 engines, our operations and financial results may be adversely impacted. The Company's operating results could be negatively impacted by disruptions of its information technology and communication systems. Our businesses depend heavily on information technology and computerized systems to communicate and operate effectively. The Company's systems and technologies, or those of third parties on which we rely, could fail or become unreliable due to equipment failures, software viruses, cyberattacks, natural disasters, power failures, telecommunication outages, or other causes. Certain disruptions could prevent our airlines from flying as scheduled, possibly for an extended period of time, which could have a negative impact on our operating results and reliability. We continually monitor the risks of disruption, take preventative measures, develop backup plans and maintain redundancy capabilities. The measures we use may not prevent the causes of disruptions we could experience or help us recover failed systems quickly. The costs of maintaining safeguards, recovery capabilities and preventive measures may continue to rise. Further, the costs of recovering or replacing a failed system could be very expensive. The costs of our aircraft maintenance facilities could negatively impact our financial results. We lease and operate a 310,000 square foot aircraft maintenance facility and a 100,000 square foot component repair shop in Wilmington, Ohio. Additionally, we lease and operate a 311,500 square foot, two-hangar aircraft maintenance complex in Tampa, Florida. Accordingly, a large portion of the operating costs for our aircraft maintenance and conversion business are fixed. As a result, we need to retain existing aircraft maintenance business levels to maintain a profitable operation. The actual level of revenues may not be sufficient to cover our operating costs. Additionally, revenues from aircraft maintenance can vary among periods due to the timing of scheduled maintenance events and the completion level of work during a period. The Company could violate debt covenants. The Senior Credit Agreement contains covenants including, among other requirements, limitations on certain additional indebtedness and guarantees of indebtedness. The Senior Credit Agreement is collateralized by certain of the Company's Boeing 767 and 757 aircraft that are not collateralized under aircraft loans. Under the terms of the Senior Credit Agreement, the Company is required to maintain aircraft collateral coverage equal to 125% of the outstanding balance of the term loan and the maximum capacity of the revolving credit facility or 150% of the outstanding balance of the term loan and the total funded revolving credit facility, whichever is less. The Senior Credit Agreement stipulates events of default, including unspecified events that may have material adverse effects on the Company. If an event of default occurs, the Company may be forced to repay, renegotiate or replace the Senior Credit Agreement and loans. In such an event, the Company’s cost of borrowings could increase, and our ability to modify and deploy aircraft could be limited as a result. 15 Operating results may be affected by fluctuations in interest rates. The Company enters into interest rate derivative instruments from time to time in conjunction with its debt levels. The Company's Senior Credit Agreement requires the Company to maintain derivative instruments for fluctuating interest rates for at least 50% of the outstanding balance of the new unsubordinated term loan. We typically do not designate the derivative instruments as hedges for accounting purposes. Future fluctuations in LIBOR interest rates will result in the recording of gains and losses on interest rate derivatives that the Company holds. Under the Senior Credit Agreement, interest rates are adjusted quarterly based on the prevailing LIBOR or prime rates and a ratio of the Company's outstanding debt level to earnings before interest, taxes, depreciation and amortization expenses ("EBITDA"). At the Company's current debt-to-EBITDA ratio, the unsubordinated term loan and the revolving credit facility both bear a variable interest rate of 3.07%. Additional debt or lower EBITDA may result in higher interest rates on the variable rate portion of the Company's debt. The Company sponsors defined benefit pension plans and post-retirement healthcare plans for certain eligible employees. The Company's related pension expense, the plans' funded status and funding requirements are sensitive to changes in interest rates. The plans' funded status and annual pension expense are recalculated at the beginning of each calendar year using the fair value of plan assets and market-based interest rates at that point in time, as well as assumptions for asset returns and other actuarial assumptions. Future fluctuations in interest rates including the impact on asset returns, could result in the recording of additional expense for pension and other post-retirement healthcare plans. The costs of insurance coverage or changes to our reserves for self-insured claims could affect our operating results and cash flows. The Company is self-insured for certain claims related to workers’ compensation, aircraft, automobile, general liability and employee healthcare. We record a liability for reported claims and an estimate for incurred claims that have not yet been reported. Accruals for these claims are estimated utilizing historical paid claims data and recent claims trends. Changes in claim severity and frequency could impact our results of operations and cash flows. The ability to use net operating loss carryforwards to offset future taxable income for U.S. federal income tax purposes may be further limited. Limitations imposed on the ability to use net operating losses (“NOLs”) to offset future taxable income could cause U.S. federal income taxes to be paid earlier than otherwise would be paid if such limitations were not in effect and could cause such NOLs to expire unused, in each case reducing or eliminating the benefit of such NOLs. Similar rules and limitations may apply for state income tax purposes. Changes in the ownership of the Company on the part of significant shareholders could limit our ability to use NOLs to offset future taxable income. In general, under Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), a corporation that undergoes an “ownership change” is subject to limitations on its ability to utilize its pre-change NOLs to offset future taxable income. In general, an ownership change occurs if the aggregate stock ownership of significant stockholders increases by more than 50 percentage points over such stockholders’ lowest percentage ownership during the testing period (generally three years). Strategic investments in other businesses may not result in the desired benefits. We enter into joint venture and other business ownership agreements with the expectation that such investment will result in various benefits including revenue growth through geographic diversification and product diversification, improved cash flows and better operating efficiencies. Achieving the anticipated benefits from such agreements is subject to a number of challenges and uncertainties. The expected benefits may be only partially realized or not at all, or may take longer to realize than expected, which could adversely impact our financial condition and results of operations. We may make additional capital contributions to these business. We may need to reduce the carrying value of the Company’s assets. The Company owns a significant amount of aircraft, aircraft parts and related equipment. Additionally, the balance sheet reflects assets for income tax carryforwards and other deferred tax assets. The removal of aircraft from service or continual losses from aircraft operations could require us to evaluate the recoverability of the carrying value of those aircraft, related parts and equipment and record an impairment charge through earnings to reduce the carrying value. 16 We have recorded goodwill and other intangible assets related to acquisitions and equity investments. If we are unable to achieve the projected levels of operating results, it may be necessary to record an impairment charge to reduce the carrying value of goodwill, equity investments and related intangible assets. Similarly, if we were to lose a key customer or one of our airlines were to lose its authority to operate, it could be necessary to record an impairment charge. If the Company incurs operating losses or our estimates of expected future earnings indicate a decline, it may be necessary to reassess the need for a valuation allowance for some or all of the Company’s net deferred tax assets. We may be impacted by government requirements associated with transacting business in foreign jurisdictions. The U.S and other governments have imposed trade and economic sanctions in certain geopolitical areas. The U.S. Departments of Justice, Commerce and Treasury, as well as other government agencies have a broad range of civil and criminal penalties they may seek to impose for violations of the Foreign Corrupt Practices Act (“FCPA”), sanctions administered by the Office of Foreign Assets Control (“OFAC”) and other regulations. In addition, the DOT, FAA and TSA may at times limit the ability of our airline subsidiaries to conduct flight operations in certain areas of the world. Under such laws and regulations, we may be obliged to limit our business activities, we may incur costs for compliance programs and we may be subject to enforcement actions or penalties for noncompliance. In recent years, the U.S. government has increased their oversight and enforcement activities with respect to these laws and the relevant agencies may continue to increase these activities. Penalties, fines and sanctions levied by governmental agencies or the costs of complying with government regulations could negatively affect our results of operations. The operations of the Company’s subsidiaries are subject to complex aviation, transportation, security, environmental, labor, employment and other laws and regulations. These laws and regulations generally require our subsidiaries to maintain and comply with a wide variety of certificates, permits, licenses and other approvals. Their inability to maintain required certificates, permits or licenses, or to comply with applicable laws, ordinances or regulations could result in substantial fines or, in the case of DOT and FAA requirements, possible suspension or revocation of their authority to conduct operations. The costs of maintaining our aircraft in compliance with government regulations could negatively affect our results of operations and require further investment in our aircraft fleet. All aircraft in the Company’s fleet were manufactured prior to 1998. Manufacturer Service Bulletins and FAA regulations and FAA airworthiness directives issued under its “Aging Aircraft” program cause operators of such aged aircraft to be subject to additional inspections and modifications to address problems of corrosion and structural fatigue at specified times. The FAA may issue airworthiness directives that could require significant costly inspections and major modifications to such aircraft. The FAA may issue airworthiness directives that could limit the usability of certain aircraft types. In 2012, the FAA issued an airworthiness directive that requires the replacement of the aft pressure bulkhead on Boeing 767-200 aircraft based on a certain number of landing cycles. As a result, we expect that some the Company's Boeing 767-200 aircraft will be affected. The cost of compliance is estimated to be approximately $1.0 million per aircraft over the next several years. In addition, FAA regulations require that aircraft manufacturers establish limits on aircraft flight cycles to address issues involving aging, but still economically viable, aircraft, as described in Item 1 of this report, under "Federal Aviation Administration." These regulations may increase our maintenance costs and eventually limit the use of our aircraft. The FAA and ICAO are in the process of developing programs to modernize air traffic control and management systems. The FAA's program, Next Generation Air Transportation Systems, is an integrated system that requires updating aircraft navigation and communication equipment. The FAA has mandated the replacement of current ground based radar systems with more accurate satellite based systems on our aircraft by 2020. The ICAO began phasing in similar requirements for aircraft operating in Europe during 2015. These programs may increase our costs and limit the use of our aircraft. Aircraft not equipped with advanced communication systems may be restricted to certain airspace. 17 Failure to maintain the operating certificates and authorities of our airlines would adversely affect our business. The airline subsidiaries have the necessary authority to conduct flight operations pursuant to the economic authority issued by the DOT and the safety based authority issued by the FAA. The continued effectiveness of such authority is subject to their compliance with applicable statutes and DOT, FAA and TSA rules and regulations, including any new rules and regulations that may be adopted in the future. The loss of such authority by an airline subsidiary could cause a default of covenants within the Senior Credit Agreement and would materially and adversely affect its airline operations, effectively eliminating the airline's ability to continue to provide air transportation services. The Company may be affected by global climate change or by legal, regulatory or market responses to such potential climate change. The Company is subject to the regulations of the U.S. Environmental Protection Agency ("EPA") and state and local governments regarding air quality and other matters. In part, because of the highly industrialized nature of many of the locations where the Company operates, there can be no assurance that we have discovered all environmental contamination or other matters for which the Company may be responsible. Concern over climate change, including the impact of global warming, has led to significant federal, state and international legislative and regulatory efforts to limit greenhouse gas ("GHG") emissions. The European Commission has mandated the extension of the European Union Emissions Trading Scheme ("ETS") for GHG emissions to the airline industry. Under the European Union ETS, all ABX and ATI flights that are wholly within the European Union are now covered by the ETS requirements, and each year we are required to submit emission allowances in an amount equal to the carbon dioxide emissions from such flights. Exceedance of the airlines' emission allowances would require the airlines to purchase additional emission allowances on the open market. Similarly, in 2016, the International Civil Aviation Organization (“ICAO”) passed a resolution adopting the Carbon Offsetting and Reduction Scheme for International Aviation (“CORSIA”), which is a global, market-based emissions offset program to encourage carbon-neutral growth beyond 2020. A pilot phase is scheduled to begin in 2021 in which countries may voluntarily participate, and full mandatory participation is scheduled to begin in 2027. ICAO continues to develop details regarding implementation, but compliance with CORSIA will increase our operating costs. The U.S. Congress and certain states have also considered legislation regulating GHG emissions. In addition, even in the absence of such legislation, the EPA could regulate greenhouse GHG emissions, especially aircraft engine emissions. In July 2016, the EPA, issued a finding that aircraft engine emissions cause or contribute to air pollution that may reasonably be anticipated to endanger public health. This finding is a regulatory prerequisite to the EPA’s adoption of a new certificate standard for aircraft emissions. However, the U.S. recently withdrew from the Paris climate accord, an agreement among 196 countries to reduce GHG emissions, and the effect of that withdrawal on future U.S. policy regarding GHG emissions, on CORSIA and on other GHG regulation is uncertain. The cost to comply with potential new laws and regulations could be substantial for the Company. These costs could include an increase in the cost of fuel and capital costs associated with updating aircraft. Until the timing, scope and extent of any future regulation becomes known, we cannot predict its effect on the Company’s cost structure or operating results. Further, even without such legislation or regulation, increased awareness and adverse publicity in the global marketplace about greenhouse gas emitted by companies in the airline and transportation industries could harm our reputation and reduce demand for our services. ITEM 1B. UNRESOLVED STAFF COMMENTS None. ITEM 2. PROPERTIES The Company leases portions of the air park in Wilmington, Ohio, under lease agreements with a regional port authority, the terms of which expire in May of 2019 and June 2036 with options to extend. The leases include corporate offices, 310,000 square feet of maintenance hangars and a 100,000 square foot component repair shop at the air park. ABX also has the non-exclusive right to use the airport, which includes one active runway, taxiways and ramp space. Additionally, the Company leases and operates a 311,500 square foot, two hangar aircraft maintenance complex in Tampa, Florida. 18 As of December 31, 2017, the Company and its subsidiaries' in-service aircraft fleet consisted of 70 owned aircraft. The aircraft were all formerly passenger aircraft that have been modified for cargo operations. The aircraft are generally described as being mid-size or having medium wide-body cargo capabilities. The cargo aircraft carry gross payloads ranging from approximately 47,900 to 129,000 pounds. These aircraft are well suited for intra-continental flights and medium range inter-continental flights. Because an airline's flight operations can be hindered by inclement weather, sophisticated landing systems and other equipment are utilized to minimize the effect that weather may have on flight operations. For example, ABX’s and ATI's Boeing 767-200 and 767-300 aircraft are operated for Category III landings. This allows their crews to land under weather conditions with forward runway visibility of only 600 feet at airports with Category III Instrument Landing Systems. The table below shows the combined fleet of aircraft in service condition. In-service Aircraft as of December 31, 2017 Aircraft Type Total Owned Year of Manufacture Gross Payload (Lbs.) Still Air Range (Nautical Miles) 767-200 SF (1) 767-300 SF (1) 757-200 PCF (1) 757-200 Combi (2) 737-400 SF (1) Total in-service 36 25 4 4 1 70 36 25 4 4 1 70 1982 - 1987 85,000 - 100,000 1,700 - 5,300 1988 - 1997 121,000 - 129,000 3,200 - 7,100 1984 - 1991 1989 - 1992 1991 68,000 58,000 47,900 2,100 - 4,800 2,600 - 4,300 2,200 - 2,800 ____________________ (1) These aircraft are configured for standard cargo containers loaded through large standard main deck cargo doors. These aircraft are configured as “combi” aircraft capable of carrying passenger and cargo containers on the main flight deck. (2) In addition, as of December 31, 2017, CAM had one Boeing 767-200 passenger aircraft that is not reflected in the table above. The Boeing 767-200 aircraft discontinued passenger service in 2015 when a customer's operation ended. CAM also owns six Boeing 767-300 aircraft and one Boeing 737-400 aircraft which were undergoing or preparing to undergo modification to a standard freighter configuration and are expected to be completed in 2018. We believe that our existing facilities and aircraft fleet are appropriate for our current operations. As described in Note H to the accompanying financial statements, we plan to invest in additional aircraft to meet our growth plans. We may make additional investments in aircraft and facilities if we identify favorable opportunities in the markets that we serve. ITEM 3. LEGAL PROCEEDINGS We are currently a party to legal proceedings, including FAA enforcement actions, in various federal and state jurisdictions arising out of the operation of the Company's business. The amount of alleged liability, if any, from these proceedings cannot be determined with certainty; however, we believe that the Company's ultimate liability, if any, arising from the pending legal proceedings, as well as from asserted legal claims and known potential legal claims which are probable of assertion, taking into account established accruals for estimated liabilities, should not be material to our financial condition or results of operations. ITEM 4. MINE SAFETY DISCLOSURES Not applicable 19 PART II ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS, AND ISSUER PURCHASES OF EQUITY SECURITIES Common Stock The Company's common stock is publicly traded on the NASDAQ Global Select Market under the symbol ATSG. The following table shows the range of high and low prices per share of ATSG common stock for the periods indicated: 2017 Quarter Ended: December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 2016 Quarter Ended: December 31, 2016 September 30, 2016 June 30, 2016 March 31, 2016 Low High 22.55 20.84 15.78 14.97 12.94 12.73 12.36 9.05 $ $ $ $ $ $ $ $ Low 26.75 25.91 24.21 17.81 High 17.29 14.91 15.43 15.53 $ $ $ $ $ $ $ $ On February 28, 2018, there were 1,494 stockholders of record of ATSG’s common stock. The closing price of ATSG’s common stock was $26.47 on February 28, 2018. Dividends We are restricted from paying dividends on ATSG's common stock in excess of $100.0 million during any calendar year under the provisions of the Senior Credit Agreement. No cash dividends have been paid or declared. Stock Repurchases On August 5, 2014, the Board of Directors authorized the Company to repurchase up to $50.0 million of outstanding common stock. In May 2016, the Board amended the Company's common stock repurchase program increasing the amount that management may repurchase from $50.0 million to $100.0 million of outstanding common stock. In February 2018, the Board increased the authorization from $100.0 million to $150.0 million. The Board's authorization does not require the Company to repurchase a specific number of shares or establish a time frame for any repurchase and the Board may terminate the repurchase program at any time. Repurchases may be made from time to time in the open market or in privately negotiated transactions. There is no expiration date for the repurchase program. There were no repurchases made during the fourth quarter of 2017. As of December 31, 2017, the Company had repurchased 6,435,349 shares and the maximum dollar value of shares that could then be purchased under the program was $14.9 million. 20 Securities authorized for issuance under equity compensation plans For the response to this Item, see Item 12. Performance Graph The graph below compares the cumulative total stockholder return on a $100 investment in ATSG’s common stock with the cumulative total return of a $100 investment in the NASDAQ Composite Index and the cumulative total return of a $100 investment in the NASDAQ Transportation Index for the period beginning on December 31, 2012 and ending on December 31, 2017. Air Transport Services Group, Inc. NASDAQ Composite Index NASDAQ Transportation Index 12/31/2012 100.00 12/31/2013 201.75 12/31/2014 213.47 12/31/2015 251.37 12/31/2016 398.01 12/31/2017 577.06 100.00 100.00 141.63 133.76 162.09 187.65 173.33 162.30 187.19 193.79 242.29 248.92 21 ITEM 6. SELECTED CONSOLIDATED FINANCIAL DATA The following selected consolidated financial data should be read in conjunction with the consolidated financial statements and the notes thereto and the information contained in Item 7 of Part II, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” The selected consolidated financial data and the consolidated operations data below are derived from the Company’s audited consolidated financial statements. OPERATING RESULTS: Continuing revenues Operating expenses (1) (3) Net interest expense and other non operating charges Financial instrument (gain) loss (2) Earnings (loss) from continuing operations before income taxes Income tax gain (expense) (4) Earnings (loss) from continuing operations Earnings (loss) from discontinued operations, net of taxes (3) Consolidated net earnings (loss) EARNINGS (LOSS) PER SHARE FROM CONTINUING OPERATIONS: Basic Diluted WEIGHTED AVERAGE SHARES: Basic Diluted SELECTED CONSOLIDATED FINANCIAL DATA: Cash and cash equivalents Property and equipment, net Goodwill and intangible assets (1) Total assets Post-retirement liabilities (3) Long term debt and current maturities, other than leases Deferred income tax liability (4) Stockholders’ equity ____________________ (1) (2) 2017 As of and for the Years Ended December 31 2015 (In thousands, except per share data) 2014 2016 2013 $1,068,200 974,905 20,042 79,789 $ 768,870 705,122 11,187 18,107 $ 619,264 546,474 11,147 (920) $ 589,592 525,067 13,845 (1,096) $ 580,023 566,838 14,175 (631) (6,536) 34,454 62,563 51,776 (359) 28,276 21,740 (3,245) (13,394) 21,060 2,428 (23,408) 39,155 2,067 (19,702) 32,074 (2,214) (19,266) (19,625) (3) $ 18,495 $ 23,488 $ 41,222 $ 29,860 $ (19,628) $ $ 0.37 0.36 $ $ 0.34 0.33 $ $ 0.61 0.60 $ $ 0.50 0.49 $ $ (0.31) (0.31) 58,907 59,686 61,330 62,994 64,242 65,127 64,523 65,211 63,992 63,992 $ 32,699 1,159,962 44,577 1,548,844 63,266 515,758 99,444 395,279 $ 16,358 1,000,992 45,586 1,259,330 79,528 458,721 122,532 311,902 $ 17,697 875,401 38,729 1,041,721 110,166 318,200 96,858 364,157 $ 30,560 847,268 39,010 1,011,203 94,368 344,094 83,223 347,489 $ 31,699 838,172 39,291 1,018,613 32,865 384,515 95,912 368,968 In 2013, the Company recorded an impairment charge of $52.6 million on goodwill. During 2016 and 2017, the re-measurement of financial instrument fair values, primarily for warrants granted to a customer resulted in losses of $79.8 million and $18.1 million, respectively, before income taxes. (See note B to the accompanying consolidated financial statements.) During 2014, ABX settled $98.7 million of pension obligation from the pension plans assets. The settlement resulted in pre-tax charges of $6.7 million to continued operations and $5.0 million to discontinued operations for 2014. Effective December 31, 2016, ABX modified its unfunded, non-pilot retiree medical plan to terminate benefits to all participants. As a result, ABX settled $0.6 million of retiree medical obligations and recorded a pre-tax gain of $2.0 million to continued operations. On August 30, 2017, the ABX transferred investment assets from the pension plan trust to purchase a group annuity contract. As a result, ABX recorded pre-tax settlement charges of $5.3 million to continued operations and $7.6 million to discontinued operations. As a result of fluctuating interest rates and investment returns, the funded status of the Company's defined benefit pension and retiree medical plans vary from year to year. (See note I to the accompanying consolidated financial statements.) Earnings from continuing operations for 2017 was impacted by a $59.9 million reduction in deferred income taxes related to the Tax Cuts and Jobs Act legislation enacted in December 2017. (See note J to the accompanying consolidated financial statements.) (3) (4) 22 ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS The following Management’s Discussion and Analysis has been prepared with reference to the historical financial condition and results of operations of Air Transport Services Group, Inc., and its subsidiaries and should be read in conjunction with the “Risk Factors” in Item 1A of this report, our historical financial statements, and the related notes contained in this report. INTRODUCTION The Company leases aircraft, provides air cargo lift and performs aircraft maintenance and other support services primarily to the air cargo transportation and package delivery industries. Through the Company's subsidiaries, we offer a range of complementary services to delivery companies, freight forwarders, e-commerce operators, airlines and government customers. Our principal subsidiaries include two independently certificated airlines, ABX Air, Inc. (“ABX”) and Air Transport International, Inc. (“ATI”), and an aircraft leasing company, Cargo Aircraft Management, Inc. (“CAM”). CAM provides competitive aircraft lease rates by converting passenger aircraft into cargo freighters and offering them to customers under long-term leases. We have three reportable segments: CAM, which leases Boeing 767, Boeing 757 and Boeing 737 aircraft and aircraft engines, ACMI Services, which primarily includes the cargo transportation operations of the two airlines, and Ground Services, which provides mail and package sorting services as well as related equipment maintenance services to customers. Our other business operations, which primarily provide support services to the transportation industry, include aircraft maintenance and modification services. These operations do not constitute reportable segments due to their size. Our largest customers are DHL Network Operations (USA), Inc. and its affiliates ("DHL"), Amazon.com Services, Inc. ("ASI"), successor to Amazon Fulfillment Services, Inc., a subsidiary of Amazon.com, Inc. ("Amazon"), and the U.S. Military. At December 31, 2017, CAM owned 70 cargo aircraft that were in revenue service. This fleets consists of 36 Boeing 767-200 aircraft, 25 Boeing 767-300 aircraft, four Boeing 757-200 aircraft, four Boeing 757 "combi" aircraft and one Boeing 737-400 aircraft. The Boeing 757 combi aircraft are capable of simultaneously carrying passengers and cargo containers on the main flight deck. At December 31, 2017, CAM also owned six Boeing 767-300 aircraft and one Boeing 737-400 aircraft either already undergoing, or awaiting induction in the freighter conversion process. We have had long term contracts with DHL since August 2003. DHL accounted for 24%, 34% and 46% of the Company's consolidated revenues during the years ended December 31, 2017, 2016 and 2015, respectively. In 2010,we executed commercial agreements under which DHL leased thirteen Boeing 767 freighter aircraft from CAM and ABX operated those aircraft under a separate crew, maintenance and insurance agreement. In 2015, the Company and DHL amended and restated their Air Transportation Services Agreement ("CMI agreement") and the Boeing 767-200 aircraft lease terms with DHL were extended. Under the CMI agreement, ABX operates and maintains the aircraft through March 2019 based on pre-defined fees scaled for the number of aircraft hours flown, aircraft scheduled and flight crews provided to DHL for its network. Under the pricing structure of the CMI agreement, ABX is responsible for complying with FAA airworthiness directives, the cost of Boeing 767 airframe maintenance and certain engine maintenance events for the DHL-leased aircraft that it operates. As of December 31, 2017, the Company, through CAM, leased 16 Boeing 767 aircraft to DHL, ten Boeing 767-200, through March 2019 and six Boeing 767-300 expiring between 2019 and 2024. Twelve of the 16 Boeing 767 were being operated by the Company's airlines for DHL. Additionally, the airlines operated four CAM-owned Boeing 757 aircraft under other operating arrangements with DHL. We have been providing freighter aircraft and services for cargo handling and logistical support for Amazon's ASI since September 2015. On March 8, 2016, we entered into an Air Transportation Services Agreement (the “ATSA”) with ASI pursuant to which CAM agreed to lease 20 Boeing 767 freighter aircraft to ASI, including 12 Boeing 767-200 freighter aircraft for a term of five years and eight Boeing 767-300 freighter aircraft for a term of seven years. Since August 2017, we have leased all 20 Boeing 767 freighter aircraft to ASI. The ATSA also provides for the operation of those aircraft by our airline subsidiaries, for a term of five years, and the performance of ground handling services by our subsidiary, LGSTX Services, Inc. ("LGSTX"). Under the ATSA, we operate the aircraft based on pre-defined fees scaled for the number of aircraft hours flown, aircraft scheduled and flight crews provided to ASI for its network. CAM owns all of the Boeing 767 aircraft that are leased and operated under the ATSA. The ATSA became effective 23 on April 1, 2016. Revenues from our commercial arrangements with ASI comprised approximately 44%, 29% and 5% of our consolidated revenues from continuing operations during the years ended December 31, 2017, 2016 and 2015, respectively. In conjunction with the execution of the ATSA, the Company and Amazon entered into an Investment Agreement and a Stockholders Agreement on March 8, 2016. The Investment Agreement calls for the Company to issue warrants in three tranches which grant Amazon the right to acquire up to 19.9% of the Company’s pre-transaction outstanding common shares measured on a GAAP-diluted basis, adjusted for share issuances and repurchases by the Company following the date of the Investment Agreement and after giving effect to the warrants granted. The exercise price of the warrants is $9.73 per share, which represents the closing price of the Company’s common shares on February 9, 2016. Each of the three tranches of warrants will be exercisable in accordance with its terms through March 8, 2021. Our accounting for the warrants issued to Amazon has been determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. The fair value of the warrants issued or issuable to Amazon are recorded as a lease incentive asset and are amortized against revenues over the duration of the aircraft leases. The warrants are accounted for as financial instruments, and accordingly, the fair value of the outstanding warrants are measured and classified in liabilities at the end of each reporting period. As of December 31, 2017, our liabilities reflected 14.83 million warrants having a fair value of $14.24 per share. During 2017, the re- measurements of the warrants to fair value resulted in a non-operating loss of $81.8 million before the effect of income taxes. The U.S. Military comprised 7%, 12% and 16% of the Company's consolidated revenues during the years ended December 31, 2017, 2016 and 2015, respectively. The Company's airlines contract their services to the Air Mobility Command ("AMC"), through the U.S. Transportation Command ("USTC"), both of which are organized under the U.S. Military. RESULTS OF OPERATIONS Fleet Summary Our cargo aircraft fleet is summarized in the following table as of December 31, 2017, 2016 and 2015. Our CAM- owned operating aircraft fleet has increased by 15 aircraft since the end of 2015 driven by customer demand for the Boeing 767-300 converted freighter. Our freighters, converted from passenger aircraft, utilize standard shipping containers and can be deployed into regional cargo markets more economically than larger capacity aircraft, newly built freighters or other competing alternatives. At December 31, 2017, the Company owned six Boeing 767-300 aircraft and one Boeing 737-400 aircraft that were either already undergoing, or awaiting induction into the freighter conversion process. Aircraft fleet activity during 2017 is summarized below: - CAM completed the modification of seven Boeing 767-300 freighter aircraft purchased in the previous year and began to lease five of those aircraft, which are being operated by ATI, under a multi-year lease to ASI. CAM began to lease the sixth aircraft to ATI and the Company leased the seventh aircraft under a multi-year lease to an external customer. - CAM leased one Boeing 767-300 freighter aircraft, which was modified during 2016, to ASI under a multi- year lease. ATI was separately contracted to operate that aircraft. - CAM leased one Boeing 767-200 freighter, which was being staged for leasing, to ATI. - External lessees returned two Boeing 767-200 freighter aircraft which were operated by ABX. Two Boeing 767-200 aircraft were redeployed to external customers. - CAM purchased eight Boeing 767-300 passenger aircraft during 2017 for the purpose of converting the aircraft into standard freighter configuration. Two of these aircraft completed the freighter modification and entered into multi-year leases with external customers. - The Company purchased two Boeing 737-400 passenger aircraft during 2017 for the purpose of converting the aircraft into standard freighter configuration. One aircraft completed the freighter modification process and entered into a multi-year lease with an external customer. 24 In-service aircraft Aircraft owned Boeing 767-200 Boeing 767-300 Boeing 757-200 Boeing 757-200 Combi Boeing 737-400 Total Operating lease Boeing 757-200 Total Other aircraft Owned Boeing 767-300 under modification Owned Boeing 737-400 under modification Owned Boeing 767 available or staging for lease 2017 2016 2015 ACMI Services CAM Total ACMI Services CAM Total ACMI Services CAM Total 7 4 29 21 4 — 4 — — 19 1 51 — — — — — 6 1 — — — 36 25 4 4 1 70 — — 6 1 — 6 4 29 12 4 — 4 — — — 18 41 — — — — — 7 — — 1 — 35 16 4 4 — 59 — — 7 — 1 13 4 23 7 4 — 4 — — — 25 30 1 — 1 — — 2 — — — — 36 11 4 4 — 55 1 1 2 — — As of December 31, 2017, ABX and ATI were leasing 19 in-service aircraft internally from CAM for use in ACMI Services. As of December 31, 2017, six of CAM's 29 Boeing 767-200 aircraft shown in the aircraft fleet table above and six of the 21 Boeing 767-300 aircraft were leased to DHL and operated by ABX. Additionally, 12 of CAM's 29 Boeing 767-200 aircraft and eight of CAM's 21 Boeing 767-300 aircraft were leased to ASI and operated by ABX or ATI. CAM leased the other 11 Boeing 767-200 aircraft and seven Boeing 767-300 aircraft to external customers, including four Boeing 767-200 aircraft to DHL that are being operated by a DHL-owned airline. The carrying values of the total in-service fleet as of December 31, 2017, 2016 and 2015 were $955.2 million, $793.9 million and $742.6 million, respectively. The table above does not reflect one Boeing 767-200 passenger aircraft owned by CAM. Revenue and Earnings Summary External customer revenues from continuing operations increased by $299.3 million to $1,068.2 million during 2017 compared to 2016. Excluding directly reimbursed ACMI Services revenues, customer revenues increased $226.1 million, or 33% during 2017 compared with 2016. External customer revenues increased due to additional aircraft leases from CAM's leasing operations, expanded CMI and logistic services for ASI and aircraft maintenance and modification services for various customers. 25 The consolidated net earnings from continuing operations were $21.7 million for 2017 compared to $21.1 million for 2016. The pre-tax losses from continuing operations were $6.5 million for 2017 compared to pre-tax earnings of $34.5 million, for 2016. Earnings were affected by specific events and certain adjustments that do not directly reflect our underlying operations among the years presented. Consolidated net earnings for 2017 were impacted by $59.9 million of tax benefits for the re-measurement of the Company's deferred tax assets and liabilities at the new federal corporate tax rate of 21% enacted by the Tax Cuts and Jobs Act legislation in December 2017. On a pre-tax basis, earnings included net losses of $79.8 million and $18.1 million for the years ended December 31, 2017 and 2016, respectively, for the re-measurement of financial instruments, including warrant obligations granted to Amazon. Pre- tax earnings were also reduced by $14.0 million and $4.5 million for the years ended December 31, 2017 and 2016, respectively, for the amortization of lease incentives given to ASI in the form of warrants. Additionally, pre-tax earnings from continuing operations included expenses of $6.1 million and $6.8 million for the years ended December 31, 2017 and 2016, respectively, for settlement charges, curtailments and other non-service components of retiree benefit plans. Pre-tax earnings for the year ended December 31, 2017 included a $3.1 million loss for the Company's share of development costs for a new joint venture. Pre-tax earnings for the year ended December 31, 2016, also included a $1.2 million charge for the Company's share of capitalized debt issuance costs that were charged off when West Atlantic AB, a non-consolidated affiliate, restructured its debt. After removing the effects of these items, adjusted pre-tax earnings from continuing operations, a non-GAAP measure (a definition and reconciliation of adjusted pre-tax earnings from continuing operations follows) were $96.5 million for 2017 compared to $65.1 million for 2016, an increase of 48%. Adjusted pre-tax earnings from continuing operations for 2017 improved compared to 2016, driven primarily by additional revenues and the improved financial results of our airline operations. We also experienced additional revenues and earnings due to the acquisition of Pemco World Air Services, Inc. ("Pemco") in December 2016 and the expansion of gateway ground operations for ASI. This growth in revenue was partially offset by the cost necessary to support expanded flight operations, including training costs for new flight crews, higher depreciation expense and more employee expenses, particularly in support of logistical services. Pre-tax earnings for 2017 included an additional interest expense of $2.1 million for the amortization of convertible debt discount and issuance costs. Operating results for 2016 were negatively impacted when ABX flight crew members went on strike for two days, which disrupted our customers' operations and reduced our revenues. 26 A summary of our revenues and pre-tax earnings and adjusted pre-tax earnings from continuing operations is shown below (in thousands): Years Ending December 31 2016 2015 2017 Revenues from Continuing Operations: CAM Aircraft leasing and related services Lease incentive amortization Total CAM ACMI Services Airline services Reimbursable Total ACMI Services Ground Services Other Activities Total Revenues Eliminate internal revenues Customer Revenues Pre-Tax Earnings from Continuing Operations: CAM, inclusive of interest expense ACMI Services Ground Services Other Activities Net unallocated interest expense $ $ $ Net financial instrument re-measurement (loss) gain Loss from non-consolidated affiliate Pre-Tax Earnings from Continuing Operations Add other non-service components of retiree benefit costs, net Add charges for non-consolidated affiliate Add lease incentive amortization Add net loss (gain) on financial instruments Adjusted Pre-Tax Earnings from Continuing Operations $ $ 223,546 (13,986) 209,560 $ 199,598 (4,506) 195,092 459,272 155,469 614,741 206,631 227,205 1,258,137 (189,937) 410,598 82,261 492,859 116,796 145,743 950,490 177,789 — 177,789 395,486 37,623 433,109 60,163 101,832 772,893 (181,620) (153,629) 1,068,200 $ 768,870 $ 619,264 61,510 $ 68,608 $ 2,476 9,369 4,355 (1,322) (79,789) (3,135) (6,536) 6,105 3,135 13,986 79,789 96,479 $ (32,125) 10,603 6,020 (545) (18,107) — 34,454 6,815 1,229 4,506 18,107 65,111 $ 57,457 (2,654) 5,395 3,166 (1,721) 920 — 62,563 (1,040) — — (920) 60,603 Adjusted pre-tax earnings from continuing operations, a non-GAAP measure, is pre-tax earnings excluding settlement charges and other non-service components of retiree benefit costs, gains and losses for the fair value re- measurement of financial instruments, lease incentive amortizations, the start-up costs of a non-consolidated joint venture and the charge off of debt issuance costs from a non-consolidated affiliate during the first quarter of 2016. We exclude these items from adjusted pre-tax earnings because they are distinctly different in their predictability or not closely related to our on-going operating activities. Management uses adjusted pre-tax earnings to compare the performance of core operating results between periods. Presenting this measure provides investors with a comparative metric of fundamental operations while highlighting changes to certain items among periods. Adjusted pre-tax earnings should not be considered in isolation or as a substitute for analysis of the Company's results as reported under GAAP. ACMI Reimbursable revenues shown above include revenues related to fuel, landing fees, navigation fees and certain other operating costs that are directly reimbursed to the airlines by their customers. Prior to April 1, 2015, the cost of airframe maintenance for CAM-owned, Boeing 767-200 aircraft operated for DHL and provided by the airlines were directly reimbursed. We are adopting the Financial Accounting Standards Board's Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” ("Topic 606”) effective January 1, 2018. We are adopting Topic 606 using a modified retrospective approach, under which financial statements will be prepared under the revised guidance for the year of adoption, but not for prior years. We determined that under Topic 606, the Company is an agent for aircraft 27 fuel and certain other costs reimbursed under its ACMI and CMI contracts and for certain ground services that it arranges for ASI. Under the new standards, such reimbursed amounts will be reported net of the corresponding expenses beginning in 2018. In addition to the ACMI Services reimbursable revenues shown above, revenues during 2017 and 2016 included $134.0 million and $44.5 million for directly reimbursed ground services, which under the new standard, would have been reported net of the related expenses. This application of Topic 606 will not have an impact on our reported earnings in any period. 2017 and 2016 CAM CAM offers aircraft leasing and related services to external customers and also leases aircraft internally to the Company's airlines. CAM acquires passenger aircraft and manages the modification of the aircraft into freighters. The follow-on aircraft leases normally cover a term of five to eight years. As of December 31, 2017 and 2016, CAM had 51 and 41 aircraft under lease to external customers, respectively. CAM's revenues grew by $14.5 million during 2017 compared to 2016, primarily as a result of additional aircraft leases. Revenues from external customers totaled $140.4 million and $117.6 million for 2017 and 2016, respectively. CAM's revenues from the Company's airlines totaled $69.1 million during 2017, compared to $77.5 million for 2016, reflecting the transition of CAM owned aircraft to long-term leases with external customers. CAM's aircraft leasing and related services revenues, which excludes customer lease incentive amortization, increased $23.9 million in 2017 compared to 2016, primarily as a result of new aircraft leases since mid-2016, additional engine maintenance agreements and the timing of maintenance related revenues. From mid-2016 through the end of December 2017, we have added 13 Boeing 767-300 freighter aircraft and one Boeing 737-400 freighter aircraft to CAM's lease portfolio. CAM's pre-tax earnings, inclusive of internally allocated interest expense, were $61.5 million and $68.6 million during 2017 and 2016, respectively. Decreased pre-tax earnings reflect a $5.0 million increase in internally allocated interest expense due to higher debt levels, the $9.5 million increase in the amortization of the ASI lease incentive in 2017 compared to 2016, and $15.7 million more depreciation expense driven by the addition of ten Boeing aircraft in 2017 compared to 2016. These increases were partially offset by additional external lease revenues and the timing of customer maintenance revenues. CAM's agreement to lease 20 Boeing 767 freighter aircraft to ASI includes 12 Boeing 767-200 freighter aircraft for a term of five years and eight Boeing 767-300 freighter aircraft for a term of seven years. Leases for six of these aircraft began in April 2016, and the remaining fourteen were executed by the third quarter of 2017, to fulfill the 20 aircraft requirement. During 2017, CAM purchased eight 767-300 passenger aircraft for freighter conversion, two of which were leased to external customers during 2017 after completing the conversion process. As of December 31, 2017, the remaining six of these Boeing 767-300 passenger aircraft were being modified from passenger to freighter configuration. The Company also purchased two Boeing 737-400 aircraft during 2017 and one aircraft was being modified from passenger to freighter configuration as of December 31, 2017, while the other was leased to an external customer after completing the conversion process. CAM expects to complete the freighter modification of the seven passenger aircraft which it owned at December 31, 2017 and two more acquired in early 2018. CAM has customer commitments or letters of intent for seven of these nine aircraft. CAM's future operating results will depend on the timing and lease rates under which these aircraft are ultimately leased. CAM's operating results will depend on its continuing ability to convert passenger aircraft into freighters within planned costs and within the time frames required by customers. ACMI Services The ACMI Services segment provides airline operations to its customers, typically under contracts providing for a combination of aircraft, crews, maintenance and insurance ("ACMI"). Our customers are usually responsible for supplying the necessary aviation fuel and cargo handling services and reimbursing our airline for other operating expenses such as landing fees, ramp expenses, certain aircraft maintenance expenses and fuel procured directly by the airline. Aircraft charter agreements, including those for the U.S. Military, usually require the airline to provide full 28 service, including fuel and other operating expenses for a fixed, all-inclusive price. As of December 31, 2017, ACMI Services included 51 in-service aircraft, including 19 leased internally from CAM, 12 CAM-owned freighter aircraft which are under lease to DHL and operated by ABX under the restated CMI agreement, and 20 CAM-owned freighter aircraft which are under lease to ASI and operated by ATI and ABX under the ATSA. Total revenues from ACMI Services increased $121.9 million during 2017 compared with 2016 to $614.7 million. Airline services revenues from external customers, which do not include revenues for the reimbursement of fuel and certain operating expenses, increased $48.7 million. Improved revenues were driven by additional aircraft operations for ASI and reflect a 22% increase in billable block hours. As of December 31, 2017, ACMI Services were included the operation of five more CAM-owned aircraft compared to December 31, 2016. Beginning in April 2016, in conjunction with the long-term leases executed between ASI and CAM, the related aircraft rent revenues for five aircraft operated for ASI during the first quarter of 2016 are reflected under CAM instead of ACMI Services. ACMI Services had pre-tax earnings of $2.5 million during 2017, compared to pre-tax losses of $32.1 million for 2016. Improved pre-tax results in 2017 compared to 2016 were bolstered by expanded revenues, the timing of scheduled airframe maintenance events, lower flight crew and related training expenses and decreased pension expense. Scheduled airframe maintenance expense decreased $5.5 million during 2017 compared to 2016. Airframe maintenance expense varies depending upon the number of C-checks and the scope of the checks required for those airframes scheduled for maintenance. Pension expense for ACMI Services, including the non-service components of retiree benefit costs, decreased $1.0 million as actuarially determined for 2017, compared to 2016. The pension expense in 2017 included a $5.3 million pre-tax charge for the settlement of certain retirement obligations through a third party group annuity contract. Operating results for ACMI Services were negatively impacted in 2016 by $7.0 million in lost revenue due to a work stoppage by ABX crewmembers represented by the Airline Professionals Association of the International Brotherhood of Teamsters in November 2016. Although the flight crews were ordered back to work within two days through a temporary restraining order issued by a U.S. district court, the full revenue schedule of flying operations did not resume for nearly three weeks. During 2016, we incurred additional costs for flight crews to keep pace with ASI's expanding air network. During 2016, flight crew compensation increased by $13.0 million to pay additional crews while being trained for expanded aircraft operations and when ABX's flight crews stopped volunteering for additional flight time, ABX paid a premium to assign trips to crewmembers and awarded additional compensatory days off. Maintaining profitability in ACMI Services will depend on a number of factors, including customer flight schedules, crewmember productivity and pay, employee benefits, aircraft maintenance schedules and the number of aircraft we operate. The Company's airlines are each negotiating with their respective flight crewmembers' collective bargaining units. These negotiations could result in changes that may effect our productivity, employee compensation levels and the marketability of our services. Ground Services The Ground Services segment provides mail and package sorting and logistical support to the U.S. Postal Service (“USPS”) at five USPS facilities and similar services to certain ASI gateway locations in the U.S. The Ground Services segment also provides maintenance for ground equipment, facilities and material handling equipment. Total revenues from Ground Services were $206.6 million and $116.8 million for 2017 and 2016, respectively. Revenues increased $89.8 million during 2017 compared to 2016, reflecting higher contractual costs and increased volumes at the USPS and ASI locations. The pre-tax earnings from Ground Services decreased by $1.2 million to $9.4 million in 2017, primarily reflecting the termination of hub logistics services we provided through May of 2017 for ASI at the airport in Wilmington, Ohio. Other Activities We provide other support services to our ACMI Services customers and other airlines by leveraging our knowledge and capabilities developed for our own operations over the years. Through the Company's Airborne Maintenance and Engineering Services, Inc. ("AMES") and Pemco, subsidiaries, we sell aircraft parts and provide aircraft maintenance and modification services. We also resell aviation fuel in Ohio and provide flight training. 29 External customer revenues from all other activities increased $65.3 million to $108.9 million for 2017. The increase in revenue was driven by an increase in airframe maintenance and modification revenues due to the addition of Pemco, which was acquired at the end of 2016. Revenues from aircraft maintenance services can vary among periods due to the timing of scheduled maintenance events and the completion level of work during a period. The pre-tax earnings from other activities decreased by $1.7 million to $4.4 million in 2017. Additional earnings from expanded aircraft maintenance and modification services were offset by reduced aviation fuel sales after ASI discontinued its hub in Wilmington, Ohio, higher administrative expenses and losses from an airline affiliate accounted for under the equity method. Expenses from Continuing Operations Salaries, wages and benefits expense increased $50.5 million during 2017 compared to 2016 driven by higher headcount for flight operations, maintenance services and package sorting services. The increase in expense for 2017 included $33.6 million for Pemco, acquired in December 2016. The increase during 2017 also included additional line maintenance resources to support our customers expanded network and increased block hours. During 2017, employee benefit expenses increased due to the higher level of headcount. Depreciation and amortization expense increased $19.1 million during 2017 compared to 2016. The increase in depreciation expense reflects incremental depreciation for 13 Boeing 767-300 aircraft, one Boeing 737-400 aircraft and additional aircraft engines added to the operating fleet since mid-2016, as well as capitalized heavy maintenance and navigation technology upgrades. We expect depreciation expense to increase during future periods in conjunction with our fleet expansion and capital spending plans. Maintenance, materials and repairs expense increased by $22.5 million during 2017 compared to 2016. The increase is primarily due to the addition of Pemco's maintenance and materials, which added $36.4 million of expenses for 2017 compared to 2016. The additional expense from Pemco was partially offset by fewer airframe checks for the Company's airlines and lower airframe maintenance costs for third party customers during 2017 compared to 2016. Aircraft maintenance expenses can vary among periods due to the number of scheduled airframe maintenance checks and the scope of the checks that are performed. In May 2017, our airlines entered into maintenance agreements for certain General Electric CF6 engines that power many of the Boeing 767-300 aircraft leased from CAM. Under the agreement, the engines are maintained by the service provider for a fixed fee per cycle. As a result, beginning in June 2017, the airlines began to record engine maintenance expense as flights occur. As a result, our airlines recorded an additional $4.2 million of engine maintenance expense, partially offset by a reduction to engine depreciation expense. Fuel expense increased by $62.4 million during 2017 compared to 2016. Fuel expense includes the cost of fuel to operate U.S. Military charters, reimbursable fuel billed to DHL, ASI and other ACMI customers, as well as fuel used to position aircraft for service and for maintenance purposes. The increase in fuel expense was due to a higher level of customer-reimbursed fuel which increased $66.9 million for 2017 compared to 2016. Fuel expense for military customers and other purposes declined due to fewer block hours flown for military customers in 2017. Contracted ground and aviation services expense includes navigational services, aircraft and cargo handling services and other airport services. Contracted ground and aviation services increased $89.6 million during 2017 compared to 2016. The increase is primarily due to additional logistical support services arranged for ASI gateways. Travel expense increased by $7.3 million during 2017 compared to 2016. The increase reflects additional airline services and a higher level of employee headcount in airline operations during 2017 compared to 2016. Landing and ramp expense, which includes the cost of deicing chemicals, increased by $8.8 million during 2017 compared to 2016, driven by additional flight operations. Landing and ramp fees can vary based on the flight schedules and the airports that are used in a period. Rent expense increased by $2.0 million during 2017 compared to 2015. Rent expense increased due to the acquisition of Pemco, acquired at the end of 2016, as well as increases in aircraft simulators rented to train new flight crews. Insurance expense increased by $0.4 million during 2017 compared to 2016. Aircraft fleet insurance has increased due to additional aircraft operations during 2017 compared to 2016. 30 Other operating expenses increased by $7.2 million during 2017 compared to 2016. Other operating expenses include professional fees, employee training and utilities. Other operating expenses during the first quarter of 2016 included a $1.2 million charge for the Company's share of capitalized debt issuance costs that were written off when West Atlantic AB, a non-consolidated affiliate, restructured its debt. Other operating expenses increased by $3.1 million due to the addition of Pemco. Interest expense increased by $5.7 million during 2017 compared to 2016. Interest expense increased due to a higher average debt level and interest rates on the Company's outstanding loans, offset by more capitalized interest related to our fleet expansion during 2017. Capitalized interest increased $0.5 million during 2017 to $1.8 million. Interest expense in 2017 was also impacted by the convertible notes issued in September 2017. The convertible notes have a principal value of $258.8 million and bear interest at a cash coupon rate of 1.125%. At the time of issuance, the value of the conversion feature of the convertible notes was recorded as a debt discount and is being amortized along with debt issuance cost to interest expense over the seven year term of the convertible notes. The non-cash amortization of the debt discount and issuance costs was $2.1 million during 2017. The Company recorded pre-tax net losses on financial instruments of $79.8 million during the year ended December 31, 2017, compared to losses of $18.1 million during 2016. The losses are primarily a result of re-measuring, as of December 31, 2017 and 2016, the fair value of the stock warrants granted to Amazon. Increases in the fair value of the warrant obligation since the previous re-measurement dates of December 31, 2016 and 2015, respectively, corresponded to an increase in the traded price of the Company's shares and resulted in non-cash losses. The non-cash gains and losses resulting from quarterly re-measurements of the warrants may vary widely among quarters. Income tax benefits from earnings from continuing operations for 2017 included a benefit of $59.9 million due to the enactment of the Tax Cuts and Jobs Act ("Tax Act") in December 2017. The re-measurement of deferred tax balances using the lower federal rates enacted by the Tax Act, resulted in a reduction in our net deferred tax liability and the recognition of a deferred tax benefit. Income tax benefits increased $41.7 million for 2017 compared to the 2016 income tax expense. Income taxes included a deferred income tax deduction for the loss from warrants and the amortization of the customer lease incentive. The income tax deductibility of the warrant loss and the amortization of the customer lease incentive is less than the book expenses required by generally accepted accounting principles because for tax purposes, the warrants are valued at a different time and under a different valuation method. The effective tax rate, before including the effects of the Tax Act, warrant losses and incentive amortization was 37.5% for 2017 compared to 35.3% for the year ended December 31, 2016. The higher effective tax rate for 2017 compared to 2016 reflects a lesser amount of discrete tax benefits related to state income taxes and employee stock incentive awards during 2017 compared to 2016. The effective rate for 2018 will be impacted by a number of factors, including the Tax Act and the re-measurement of the stock warrants at the end of each reporting period. As a result of the warrant re-measurements and related income tax treatment, the overall effective tax can vary significantly from period to period. We estimate that the Company's effective tax rate for 2018, before applying the deductibility of the stock warrant re-measurement and related incentive amortization and the benefit of the stock compensation, will decline to approximately 24% due to the lower federal corporate tax rates. As of December 31, 2017, the Company had operating loss carryforwards for U.S. federal income tax purposes of approximately $57.6 million which will begin to expire in 2031 if not utilized before then. We expect to utilize the loss carryforwards to offset federal income tax liabilities in the future. As a result, we do not expect to pay federal income taxes until 2023 or later. The Company may, however, be required to pay minimum taxes and certain state and local income taxes before then. The Company's taxable income earned from international flights are primarily sourced to the United States under international aviation agreements and treaties. When we operate in countries without such agreements, the Company could incur additional foreign income taxes. 31 Discontinued Operations The financial results of discontinued operations primarily reflect pension, workers' compensation cost adjustments and other benefits for former employees previously associated with ABX's former hub operations, package sorting and aircraft fueling services provided to DHL. Pre-tax losses related to the former sorting operations were $5.1 million for 2017 compared to pre-tax gains of $3.8 million for 2016. During 2017, pension expense for discontinued operations included a $7.6 million pre-tax charge for the settlement of certain retirement obligations through a third party group annuity contract. Pre-tax earnings during 2016 were a result of reductions in self- insurance reserves for former employee claims and pension credits. 2016 compared to 2015 Summary External customer revenues from continuing operations increased by $149.6 million to $768.9 million during 2016 compared to 2015. Excluding directly reimbursed revenues, customer revenues increased $105.0 million, or 18% during 2016 compared with 2015. Increased external customer revenues from CAM's leasing operations, expanded ACMI services for ASI, increased aircraft maintenance services and additional logistics services, also for ASI, were partially offset by lower ACMI service revenues for DHL during 2016, compared to 2015. The consolidated net earnings from continuing operations were $21.1 million for 2016 compared to $39.2 million for 2015. The pre-tax earnings from continuing operations were $34.5 million for 2016 compared to $62.6 million, for 2015. Earnings were affected by specific events and certain adjustments that do not directly reflect our underlying operations among the years presented. On a pre-tax basis, earnings included net losses of $18.1 million for the year ended December 31, 2016, for the re-measurement of financial instruments, primarily warrant obligations granted to Amazon during 2016, to fair value. The larger re-measurement loss for 2016 compared to 2015 primarily reflects the increase in the value of the traded ATSG share price after the warrants were granted in 2016. Pre-tax earnings for 2016 were also reduced by $4.5 million for the amortization of lease incentives given to ASI in the form of warrants during 2016. Additionally, pre-tax earnings from continuing operations for 2016 were unfavorably impacted by a $9.9 million increase in actuarial losses for the non-service component of retiree benefit plan costs compared to 2015. Separately, pre-tax earnings for the year ended December 31, 2016, included an actuarial gain of $2.0 million for the settlement of a retiree medical plan during 2016. Pre-tax earnings for the year ended December 31, 2016, also included a $1.2 million charge for the Company's share of capitalized debt issuance costs that were charged off when West Atlantic AB, a non-consolidated affiliate, restructured its debt. After removing the effects of these items, adjusted pre-tax earnings from continuing operations were $65.1 million for 2016 compared to $60.6 million for 2015. Adjusted pre-tax earnings from continuing operations for 2016 improved compared to 2015, driven by additional aircraft lease revenues, increased aircraft maintenance revenues and additional logistics support services for ASI. This growth in revenue was partially offset by the cost necessary to support expanded operations, including training costs for new flight crews, additional premium pay for ABX flight crews, higher aircraft depreciation expense and more employee expenses, particularly in our support services businesses. Operating results for 2016 were negatively impacted when ABX flight crew members went on strike for two days, which disrupted our customers' operations and reduced our revenues. Fleet Summary 2016 & 2015 As of December 31, 2016, ACMI Services leased 18 of its in-service aircraft internally from CAM. As of December 31, 2016, eight of CAM's 29 Boeing 767-200 aircraft shown in the aircraft fleet table above and six of the 12 Boeing 767-300 aircraft, were leased to DHL and operated by ABX. Additionally, 12 of CAM's 29 Boeing 767-200 aircraft and two of CAM's 12 Boeing 767-300 aircraft were leased to ASI and operated by ABX or ATI. CAM leased the other nine Boeing 767-200 aircraft and four Boeing 767-300 aircraft to external customers, including two Boeing 767-200 aircraft to DHL for operation by a DHL affiliate. Aircraft fleet activity during 2016 is summarized below: - CAM completed the modification of two Boeing 767-300 freighter aircraft purchased in the previous year and began to lease both aircraft under a multi-year lease to external customers. One of these aircraft is being operated by ABX for the customer. 32 - CAM purchased eleven Boeing 767-300 passenger aircraft during 2016 for the purpose of converting the aircraft into standard freighter configuration. Two aircraft completed the freighter modification and entered into long- term leases with ASI in 2016, and are both being operated by ATI under multi-year leases. CAM sold one of the eleven aircraft to an external customer during 2016. One aircraft completed the freighter modification and entered into service with ATI during the fourth quarter. This aircraft was subsequently entered into a long-term lease with ASI in January 2017, and is being operated by ATI under a multi-year agreement. The remaining seven Boeing 767-300 passenger aircraft were undergoing or preparing to undergo modification to a standard freighter configuration as of December 31, 2016 and are expected to be completed in 2017. - In conjunction with the ATSA, ABX and ATI returned a total of ten Boeing 767-200 freighter aircraft to CAM and external lessees returned two Boeing 767-200 freighter aircraft. All twelve were subsequently leased to ASI under multi-year leases. ABX and ATI were separately contracted to operate the aircraft for ASI. - Five other Boeing 767-200 freighter aircraft were returned from external lessees. Four were subsequently leased to ABX or ATI while one is now being prepped for other leasing. - ABX returned one Boeing 767-200 freighter and one Boeing 767-300 freighter to CAM, which were subsequently leased to different external lessees. ABX is operating the Boeing 767-300 freighter for the customer. - ATI ceased operating one DHL-owned Boeing 757-200 freighter aircraft during the third quarter. As of December 31, 2015, ACMI Services leased 25 of its in-service aircraft internally from CAM. As of December 31, 2015, 11 of CAM's 23 Boeing 767-200 aircraft shown in the aircraft fleet table above and four of the seven Boeing 767-300 aircraft, were leased to DHL and operated by ABX. CAM leased the other twelve Boeing 767-200 aircraft and three Boeing 767-300 aircraft to external customers, including two Boeing 767-200 aircraft to DHL for operation by a DHL affiliate. Aircraft fleet activity during 2015 is summarized below: - During the first quarter, two DHL-owned Boeing 767-200 aircraft, previously leased to ABX for operation in DHL's network, were returned to DHL. - CAM placed one recently modified Boeing 767-300 freighter aircraft with an external customer in February 2015 under a multi-year lease. - In February 2015, CAM purchased a Boeing 767-300 freighter aircraft that ABX was leasing from an external lessor and began to lease it to ABX. - ABX returned three Boeing 767-200 freighters to CAM, two of which were leased to external lessees in April and the third of which was leased to another external lessee in October. - During the second quarter, DHL began to lease directly from CAM three Boeing 767-300 aircraft that ABX had been providing under shorter term arrangements. ABX continued to operate the aircraft. - During the second quarter, ATI began to operate a Boeing 757 freighter that DHL leases from a third party. - During the fourth quarter, DHL transitioned two CAM Boeing 767-200 aircraft leases to another airline in the Middle East. - External lessees returned two other Boeing 767-200 freighter aircraft to CAM, which leased one to another external customer and the other aircraft to ABX during the fourth quarter of 2015. - CAM purchased one Boeing 767-300 passenger aircraft in June and completed its modification to standard freighter configuration in November. CAM began to lease that aircraft, which is operated by ABX, to DHL under a multi-year lease. - CAM purchased one Boeing 767-300 passenger aircraft in July and another one in November, which were both being modified to standard freighter configuration as of December 31, 2015. One was subsequently leased to an external customer in February 2016 and the other was leased to an external customer in July 2016. CAM CAM's revenues grew $17.3 million during 2016 compared to 2015, primarily as a result of additional aircraft leases. As of December 31, 2016 and 2015, CAM had 41 and 30 aircraft under lease to external customers, respectively. 33 Revenues from external customers totaled $117.6 million and $93.4 million for 2016 and 2015, respectively. CAM's revenues from the Company's airlines totaled $77.5 million during 2016, compared to $84.4 million for 2015. Since mid-2015, we have added six Boeing 767-300 freighter aircraft to CAM's lease portfolio through December 31, 2016. CAM's pre-tax earnings, inclusive of an interest expense allocation, were $68.6 million and $57.5 million during 2016 and 2015, respectively. Increased earnings reflect additional external lease revenues and lower interest expense, offset by higher depreciation expense for additional Boeing 767-300 aircraft and increased expenses to place and support the larger fleet of Boeing aircraft. During 2016, CAM purchased eleven 767-300 passenger aircraft for freighter conversion. As of December 31, 2016, seven of these Boeing 767-300 passenger aircraft were being modified from passenger to freighter configuration. One aircraft had been sold, while another three had completed freighter modification. ACMI Services As of December 31, 2016, ACMI Services included 46 in-service aircraft, including 18 leased internally from CAM, 14 CAM-owned freighter aircraft which are under lease to DHL and operated by ABX under the restated CMI agreement, and 14 CAM-owned freighter aircraft which are under lease to ASI and operated by ATI and ABX under the ATSA. Revenues from ACMI Services increased $59.8 million during 2016 compared with 2015 to $492.9 million. Airline services revenues from external customers, which do not include revenues for the reimbursement of fuel and certain operating expenses, increased $15.1 million. Improved revenues were driven by additional aircraft operations for ASI and reflect an 18% increase in billable block hours. As of December 31, 2016, ACMI Services were operating six more CAM-owned aircraft compared to December 31, 2015. Beginning in April 2016, in conjunction with the long-term leases executed between ASI and CAM, the related aircraft rent revenues for five aircraft operated for ASI during 2015 are reflected under CAM instead of ACMI Services. Compared to 2015, billable block hours for DHL declined during 2016, reflecting three fewer aircraft in service for DHL. Operating results for ACMI Services were impacted in 2016 by additional costs for flight crews to keep pace with ASI's expanding air network. Flight crew compensation increased by $13.0 million to pay additional crews while being trained for expanded aircraft operations and when ABX's flight crews stopped volunteering for additional flight time, ABX paid a premium to assign trips to crewmembers and awarded additional compensatory days off. Operating results for ACMI Services were also negatively impacted by $7.0 million in lost revenue due to a work stoppage by ABX crewmembers represented by the Airline Professionals Association of the International Brotherhood of Teamsters in November 2016. Although the flight crews were ordered back to work within two days through a temporary restraining order issued by a U.S. district court, the full revenue schedule of flying operations did not resume for nearly three weeks. Primarily due to these flight crew related factors, ACMI Services incurred pre-tax losses of $32.1 million during 2016, compared to pre-tax losses of $2.7 million for 2015. Larger pre-tax losses in 2016 compared to 2015 were also affected by more scheduled airframe maintenance events during 2016, and increased pension expenses. Scheduled airframe maintenance expense increased $6.5 million during 2016 compared to 2015. Airframe maintenance expense varies depending upon the number of C-checks and the scope of the checks required for those airframes scheduled for maintenance. Pension expense for ACMI Services, including the non-service components of retiree benefit costs, increased $9.6 million as actuarially determined for 2016, compared to 2015. Operating results for ACMI Services were also impacted by increased depreciation expense for two additional Boeing 767-300 aircraft in operation and reductions in CMI operations for DHL compared to 2015. Ground Services Total revenues from Ground Services were $116.8 million and $60.2 million for 2016 and 2015, respectively. Revenues increased $56.6 million during 2016 compared to 2015, reflecting higher contractual costs and increased volumes at the USPS and ASI locations. The pre-tax earnings from Ground Services increased by $5.2 million to $10.6 million in 2016, primarily reflecting the increased volume at USPS and ASI locations and the increase of hub logistics services we provided for Amazon at the airport in Wilmington, Ohio. 34 Other Activities External customer revenues from all other activities were $43.6 million and $35.7 million for 2016 and 2015, respectively. The increase in revenue was driven by an increase in airframe maintenance and conversion revenues. Revenues from aircraft maintenance can vary among periods due to the timing of scheduled maintenance events and the completion level of work during a period. The pre-tax earnings from other activities increased by $2.9 million to $6.0 million in 2016, reflecting increased airframe maintenance and aviation fuel sales during 2016. Expenses from Continuing Operations Salaries, wages and benefits expense increased $49.9 million during 2016 compared to 2015 driven by higher headcount for flight operations, maintenance services, package handling services and additional pilot premium pay while new crewmembers were being trained for our customers' expanding networks. Our employee headcount increased 32% during 2016 compared to 2015. We also added employees to support the ASI network, additional aircraft maintenance contracts and increased volume for the USPS. The non-service components of retiree benefit costs increased $9.9 million during 2016 due to lower investment returns during the previous year. Depreciation and amortization expense increased $10.1 million during 2016 compared to 2015. The increase in depreciation expense reflects incremental depreciation for six Boeing 767-300 aircraft and additional aircraft engines added to the operating fleet since mid-2015, as well as capitalized heavy maintenance and navigation technology upgrades. Maintenance, materials and repairs expense increased by $9.7 million during 2016 compared to 2015. The increase stemmed primarily from additional airframe checks and related component repairs, driven by increased block hours flown. Fuel expense increased by $34.5 million during 2016 compared to 2015. Fuel expense includes the cost of fuel to operate U.S. Military charters, reimbursable fuel billed to DHL, ASI and other ACMI customers, as well as fuel used to position aircraft for service and for maintenance purposes. The average price per gallon of aviation fuel decreased about 24% for 2016 compared to 2015. The decrease in the average price per gallon of fuel was offset by a higher level of customer-reimbursed fuel which increased $45.1 million for 2016 compared to 2015. Travel expense increased by $2.0 million during 2016 compared to 2015. The increase reflects the higher level of employee headcount in airline operations during 2016 compared to 2015. Contracted ground and aviation services expense includes navigational services, aircraft and cargo sorting services and other airport services. Contracted ground and aviation services increased $38.5 million due to additional volumes of mail and parcels processed for the USPS and ASI. Rent expense was flat in 2016 compared to 2015. Rent expense decreased during the first half of 2016 primarily due to the purchase of one Boeing 767-300 aircraft and the return of two Boeing 767-200 aircraft which were previously leased from external providers during the first quarter of 2015. This was offset by increased rent in the second half of 2016 associated with an aircraft simulator rented to train new flight crews. Landing and ramp expense, which includes the cost of deicing chemicals, increased by $3.7 million during 2016 compared to 2015, driven by additional flight operations. Landing and ramp fees can vary based on the flight schedules and the airports that are used in a period. Insurance expense increased by $0.8 million during 2016 compared to 2015. Aircraft fleet insurance has increased due to additional aircraft operations during 2016 compared to 2015. Other operating expenses increased by $9.5 million during 2016 compared to 2015. Other operating expenses include professional fees, employee training, utilities, the cost of parts sold to customers and gains on the disposition of equipment. Other operating expenses during the first quarter of 2016 included a $1.2 million charge for the Company's share of capitalized debt issuance costs that were written off when West Atlantic AB, a non-consolidated affiliate, restructured its debt. Other operating expenses also increased due to additional sales of aircraft parts during 2016 compared to 2015. 35 Interest expense increased by $0.1 million during 2016 compared to 2015. Interest expense increased due to a higher average debt level and interest rates on the Company's outstanding loans, offset by more capitalized interest related to our fleet expansion during 2016. Capitalized interest increased $1.1 million during 2016 to $1.3 million. The Company recorded pre-tax net losses on financial instruments of $18.1 million during the year ended December 31, 2016, compared to gains of $0.9 million during 2015. The 2016 losses are primarily a result of re-measuring, as of December 31, 2016, the fair value of the stock warrants granted to Amazon in March of 2016. An increase in the fair value of the warrant obligation since the initial measurement on May 12, 2016, corresponded to an increase in the traded price of the Company's shares and resulted in the non-cash, pre-tax loss of $19.1 million for 2016. Income tax expense for earnings from continuing operations decreased $10.0 million for 2016 compared to 2015 and includes a deferred income tax deduction for the warrant loss and the amortization of the customer lease incentive. The income tax deductibility of the warrant loss and the amortization of the customer lease incentive is less than the GAAP expenses for these items because for tax purposes, the warrants are valued at a different time and under a different valuation method than required by GAAP. The effective tax rate, before including the warrant loss and incentive amortization was 35.3% for 2016 compared to 37.4% for the year ended December 31, 2015. The lower effective tax rate for 2016 compared to 2015 reflects the recognition of a discrete tax benefit related to the conversion of employee stock awards during the first and fourth quarters of 2016. Discontinued Operations The financial results of discontinued operations primarily reflect pension, workers' compensation cost adjustments and other benefits for former employees previously associated with ABX's former hub operations, package sorting and aircraft fueling services provided to DHL. Pre-tax earnings related to the former sorting operations were $3.8 million for 2016 compared to $3.2 million for 2015. Pre-tax earnings during 2016 and 2015 were a result of reductions in self- insurance reserves for former employee claims and pension credits. FINANCIAL CONDITION, LIQUIDITY AND CAPITAL RESOURCES Cash Flows Net cash generated from operating activities totaled $235.0 million, $193.1 million and $173.7 million in 2017, 2016 and 2015, respectively. Improved cash flows generated from operating activities during 2017 and 2016, were driven primarily by additional aircraft leases to customers and by increased operating levels of the ACMI Services segment. Cash outlays for pension contributions were $4.5 million, $6.3 million and $6.2 million in 2017, 2016 and 2015, respectively. Capital spending levels were primarily the result of aircraft modification costs and the acquisition of aircraft for freighter modification. Cash payments for capital expenditures were $296.9 million, $264.5 million and $158.7 million in 2017, 2016 and 2015, respectively. Capital expenditures in 2017 included $209.4 million for the acquisition of eight Boeing 767-300 aircraft and two Boeing 737-400 aircraft and freighter modification costs; $53.3 million for required heavy maintenance; and $34.2 million for other equipment, including purchases of aircraft engines and rotables. Capital expenditures in 2016 included $185.3 million for the acquisition of eleven Boeing 767-300 aircraft, freighter modification costs and next generation navigation modifications; $30.4 million for required heavy maintenance; and $48.8 million for other equipment, including purchases of aircraft engines and rotables. Our capital expenditures in 2015 included $78.3 million for the acquisition of four Boeing 767-300 aircraft, freighter modification costs and next generation navigation modifications; $45.3 million for required heavy maintenance; and $35.1 million for other equipment. Cash proceeds of $0.4 million, $12.4 million and $6.8 million were received in 2017, 2016 and 2015, respectively, for the sale of aircraft engines, airframes and parts. During 2017 and 2016, we spent $11.8 million and $17.4 million, respectively, to purchase equity interests in other businesses and to acquire Pemco. Spending during 2017 included entry into a joint-venture with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. Net cash provided by financing activities was $79.7 million and $75.1 million in 2017 and 2016, respectively, while net cash used for financing activities was $36.0 million in 2015. During 2017, we drew $115.0 million from the revolving credit facility under the Senior Credit Agreement to fund capital spending. We made debt principal payments 36 of $254.4 million. Our borrowing activities were necessary to acquire and modify aircraft for deployment into air cargo markets. In September 2017, we received proceeds of $258.8 million from the issuance of convertible notes. In conjunction with the issuance of convertible notes, we received $38.5 million for the issuance of stock warrants and paid $56.1 million for related convertible note hedges. We paid issuance costs of $6.5 million for these transactions. The net proceeds from these transactions were $234.7 million, of which $205.0 million was used to pay down the balance of our revolving credit facility, thereby increasing the amount available for future draws under that facility. The convertible notes bear interest at a cash coupon rate of 1.125% and mature on October 15, 2024, unless repurchased or converted in accordance with their terms prior to such date. The convertible notes are unsecured indebtedness, subordinated to the Company's existing and future secured indebtedness and other liabilities, including trade payables. The convertible notes and the related transactions are described further in Note F of the accompanying condensed consolidated financial statements. During 2017, we spent $11.2 million to buy 530,637 shares of the Company's common stock pursuant to a share repurchase plan authorized in 2014. The repurchase plan, which originally authorized the Company to purchase up to $50.0 million of common stock, was amended by the Board in May 2016 to increase such authorization to up to $100 million and amended by the Board again in February 2018 to increase such authorization to up to $150 million. We spent $63.6 million and $10.3 million during 2016 and 2015, respectively, to repurchase shares under the authorized plan. Commitments The table below summarizes the Company's contractual obligations and commercial commitments (in thousands) as of December 31, 2017. Contractual Obligations Debt obligations, including interest payments Facility leases Aircraft and modification obligations Other leases Payments Due By Period Total $ 636,997 Less Than 1 Year $ 31,026 2-3 Years $ 53,350 4-5 Years $ 288,413 After 5 Years $ 264,208 34,176 85,305 924 11,109 85,305 433 7,175 3,873 12,019 — 491 — — — — Total contractual cash obligations $ 757,402 $ 127,873 $ 61,016 $ 292,286 $ 276,227 The long term debt bears interest at 1.125% to 6.74% per annum at December 31, 2017. After the repayment of a $3.7 million aircraft loan in January 2018, the Company's remaining long term debt bears interest at 1.125% to 3.07% per annum. For additional information about the Company's debt obligations, see Note F of the accompanying financial statements. The Company provides defined benefit pension plans to certain employee groups. The table above does not include cash contributions for pension funding, due to the absence of scheduled maturities. The timing of pension and post- retirement healthcare payments cannot be reasonably determined, except for $22.9 million expected to be funded in 2018. For additional information about the Company's pension obligations, see Note I of the accompanying financial statements. We estimate that capital expenditures for 2018 will total $300 million of which the majority will be related to aircraft purchases and freighter modifications. Actual capital spending for any future period will be impacted by aircraft acquisitions, maintenance and modification processes. We expect to finance the capital expenditures from current cash balances, future operating cash flow and the Senior Credit Agreement, the latter of which we anticipate amending for the purpose of obtaining additional borrowing. The Company outsources a significant portion of the aircraft freighter modification process to a non-affiliated third party. The modification primarily consists of the installation of a standard cargo door and loading system. For additional information about the Company's aircraft modification obligations, see Note H of the accompanying financial statements. Since August 3, 2017, the Company has been part of a joint-venture with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. We anticipate approval of a 37 supplemental type certificate from the FAA in 2019. We expect to make contributions equal to the Company's 49% ownership percentage of the program's total costs during 2018 and 2019. Liquidity The Company has a Senior Credit Agreement with a consortium of banks that includes an unsubordinated term loan of $70.6 million, net of debt issuance costs, and a revolving credit facility from which the Company has drawn $245.0 million, net of repayments, as of December 31, 2017. The revolving credit facility has a capacity of $545.0 million, permitted additional indebtedness of $300.0 million of which $258.8 million has been utilized for the issuance of convertible notes, and an accordion feature whereby the Company can draw up to an additional $100.0 million subject to the lenders' consent. The Senior Credit Agreement is collateralized by the Company's fleet of Boeing 767 and 757 freighter aircraft. Under the terms of the Senior Credit Agreement, the Company is required to maintain collateral coverage equal to 125% of the outstanding balances of the term loan and the maximum capacity of revolving credit facility or 150% of the outstanding balance of the term loan and the total funded revolving credit facility, whichever is less. The minimum collateral coverage which must be maintained is 50% of the outstanding balance of the term loan plus the revolving credit facility commitment which was $545.0 million. Each year, through May 6, 2019, the Company may request a one year extension of the final maturity date, subject to the lenders' consent. Absent such future extensions, the maturity date is currently set to expire on May 30, 2022. Under the Senior Credit Agreement, the Company is subject to covenants and warranties that are usual and customary including, among other things, limitations on certain additional indebtedness, guarantees of indebtedness, as well as a total debt to EBITDA ratio and a fixed charge coverage ratio. The Senior Credit Agreement stipulates events of default including unspecified events that may have a material adverse effect on the Company. If an event of default occurs, the Company may be forced to repay, renegotiate or replace the Senior Credit Agreement. Additional debt or lower EBITDA may result in higher interest rates. Under the Senior Credit Agreement, interest rates are adjusted quarterly based on the prevailing LIBOR or prime rates and a ratio of the Company's outstanding debt level to EBITDA (earnings before interest, taxes, depreciation and amortization expenses). At the Company's current debt-to-EBITDA ratio, the unsubordinated term loan and the revolving credit facility both bear a variable interest rate of 3.07%. At December 31, 2017, the Company had $32.7 million of cash balances. The Company had $290.7 million available under the revolving credit facility, net of outstanding letters of credit, which totaled $9.3 million. We believe that the Company's current cash balances and forecasted cash flows provided from its operating agreements, combined with its Senior Credit Agreement, will be sufficient to fund operations, capital spending, scheduled debt payments and required pension funding for at least the next 12 months. Off-Balance Sheet Arrangements As part of our ongoing business, we do not participate in transactions that generate relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities (“SPEs”), which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As of December 31, 2017 and 2016, we were not involved in any material unconsolidated SPE transactions. Certain of our operating leases and agreements contain indemnification obligations to the lessor or one or more other parties that are considered usual and customary (e.g. use, tax and environmental indemnifications), the terms of which range in duration and are often limited. Such indemnification obligations may continue after the expiration of the respective lease or agreement. No amounts have been recognized in our financial statements for the underlying fair value of guarantees and indemnifications. CRITICAL ACCOUNTING POLICIES AND ESTIMATES “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” as well as certain disclosures included elsewhere in this report, are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these financial statements requires us to select appropriate accounting policies and make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures of contingencies. 38 In certain cases, there are alternative policies or estimation techniques which could be selected. On an ongoing basis, we evaluate our selection of policies and the estimation techniques we use, including those related to revenue recognition, post-retirement liabilities, bad debts, self-insurance reserves, valuation of spare parts inventory, useful lives, salvage values and impairment of property and equipment, income taxes, contingencies and litigation. We base our estimates on historical experience, current conditions and on various other assumptions that are believed to be reasonable under the circumstances. Those factors form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources, as well as for identifying and assessing our accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions. We believe the following significant and critical accounting policies involve the more significant judgments and estimates used in preparing the consolidated financial statements. Revenue Recognition Revenues generated from airline service agreements are typically recognized based on hours flown or the amount of aircraft and crew resources provided during a reporting period. Certain agreements include provisions for incentive payments based upon on-time reliability. These incentives are typically measured on a monthly basis and recorded to revenue in the corresponding month earned. Revenues for operating expenses that are reimbursed through customer agreements, including consumption of aircraft fuel, are generally recognized as the costs are incurred. Revenues from charter service agreements are recognized on scheduled and non-scheduled flights when the specific flight has been completed. Aircraft lease revenues are recognized as operating lease revenues on a straight-line basis over the term of the applicable lease agreements. Revenues from the sale of aircraft parts and engines are recognized when the parts are delivered. Revenues earned and expenses incurred in providing aircraft-related maintenance, modifications, repair or technical services are recognized in the period in which the services are completed. Revenues derived from sorting mail and packages are recognized in the reporting period in which the services are performed. Revenue is not recognized until collectibility is reasonably assured. Goodwill and Intangible Assets We assess in the fourth quarter of each year whether the Company’s goodwill acquired in acquisitions is impaired in accordance with the Financial Accounting Standards Board Accounting Standards Codification (“FASB ASC”) Topic 350-20 Intangibles—Goodwill and Other. Additional assessments may be performed on an interim basis whenever events or changes in circumstances indicate an impairment may have occurred. Indefinite-lived intangible assets are not amortized but are assessed for impairment annually, or more frequently if impairment indicators occur. Finite-lived intangible assets are amortized over their estimated useful economic lives and are periodically reviewed for impairment. The application of the goodwill impairment test requires significant judgment, including the determination of the fair value of each reporting unit that has goodwill. We estimate the fair value using a market approach and an income approach utilizing discounted cash flows applied to a market-derived rate of return. The market approach utilizes market multiples from comparable publicly traded companies. The market multiples include revenues and EBITDA (earnings before interest, taxes, depreciation and amortization). We derive cash flow assumptions from many factors including recent market trends, expected revenues, cost structure, aircraft maintenance schedules and long term strategic plans for the deployment of aircraft. Key assumptions under the discounted cash flow models include projections for the number of aircraft in service, capital expenditures, long term growth rates, operating cash flows and market-derived discount rates. The first step of the goodwill impairment test requires a comparison of the fair value of the reporting unit to its respective carrying value. If the carrying value of a reporting unit is less than its fair value, no indication of impairment exists and a second step is not performed. If the carrying amount of a reporting unit is higher than its fair value, there is an indication that an impairment may exist and a second step is performed. In the second step, fair values are assigned to all of the assets and liabilities of a reporting unit, including any unrecognized intangible assets, and the implied fair value of goodwill is calculated. If the implied fair value of goodwill is less than the recorded goodwill, an impairment loss is recorded for the difference and charged to operations. We have used the assistance of an independent business valuation firm in estimating an expected market rate of return, and in the development of a market approach for CAM and Pemco, separately, using multiples of EBITDA and revenues from comparable publicly traded companies. Based on our analysis, as of December 31, 2017, both CAM's and Pemco's fair values exceeded their carrying values by more than 25%. Our key assumptions used for CAM's 39 goodwill testing include uncertainties, including the level of demand for cargo aircraft by shippers, the U.S. Military and freight forwarders and CAM's ability to lease aircraft and the lease rates that will be realized. The demand for customer airlift is projected based on input from customers, management's interface with customer planning personnel and aircraft utilization trends. Our key assumptions used for Pemco's goodwill testing include the level of revenues that customers will seek from Pemco and the cost of labor and contract resources Pemco is expected to incur. Certain events or changes in circumstances could negatively impact our key assumptions. Customer preferences may be impacted by changes in aviation fuel prices. Key customers, including DHL, Amazon and the U.S. Military, may decide that they do not need as many aircraft as projected or may find alternatives providers. Long-lived assets Aircraft and other long-lived assets are tested for impairment whenever events or changes in circumstances indicate the carrying value of the assets may not be recoverable. Factors which may cause an impairment include termination of aircraft from a customer's network, extended operating cash flow losses from the assets and management's decisions regarding the future use of assets. To conduct impairment testing, we group assets and liabilities at the lowest level for which identifiable cash flows are largely independent of cash flows of other assets and liabilities. For assets that are to be held and used, impairment is recognized when the estimated undiscounted cash flows associated with an asset group is less than the carrying value. If impairment exists, an adjustment is made to write the assets down to fair value, and a loss is recorded as the difference between the carrying value and fair value. Fair values are determined considering quoted market values, discounted cash flows or internal and external appraisals, as applicable. Depreciation Depreciation of property and equipment is provided on a straight-line basis over the lesser of an asset’s useful life or lease term. We periodically evaluate the estimated service lives and residual values used to depreciate our property and equipment. The acceleration of depreciation expense or the recording of significant impairment losses could result from changes in the estimated useful lives of our assets. We may change the estimated useful lives due to a number of reasons, such as the existence of excess capacity in our air networks, or changes in regulations grounding or limiting the use of aircraft. Self-Insurance We self-insure certain claims related to workers’ compensation, aircraft, automobile, general liability and employee healthcare. We record a liability for reported claims and an estimate for incurred claims that have not yet been reported. Accruals for these claims are estimated utilizing historical paid claims data and recent claims trends. Changes in claim severity and frequency could result in actual claims being materially different than the costs provided for in our results of operations. We maintain excess claim coverage with common insurance carriers to mitigate our exposure to large claim losses. Contingencies We are involved in legal matters that have a degree of uncertainty associated with them. We continually assess the likely outcomes of these matters and the adequacy of amounts, if any, provided for these matters. There can be no assurance that the ultimate outcome of these matters will not differ materially from our assessment of them. There also can be no assurance that we know all matters that may be brought against us at any point in time. Income Taxes We account for income taxes under the provisions of FASB ASC Topic 740-10 Income Taxes. The objectives of accounting for income taxes are to recognize the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. Judgment is required in assessing the future tax consequences of events that have been recognized in the Company’s financial statements or tax returns. Fluctuations in the actual outcome of expected future tax consequences could materially impact the Company’s financial position or its results of operations. The Company has significant deferred tax assets including net operating loss carryforwards (“NOL CFs”) for federal income tax purposes which begin to expire in 2031. Based upon projections of taxable income, we determined that it was more likely than not that the NOL CF’s will be realized prior to their expiration. Accordingly, we do not have an allowance against these deferred tax assets at this time. 40 We recognize the impact of a tax position, if that position is more likely than not of being sustained on audit, based on the technical merits of the position. Stock Warrants The Company’s accounting for warrants issued to a lessee is determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. The warrants issued to lessees are recorded as a lease incentive asset using their fair value at the time that the lessee has met its performance obligation. The lease incentive is amortized against revenues over the duration of related aircraft leases. The unexercised warrants are classified in liabilities and re-measured to fair value at the end of each reporting period, resulting in a non-operating gain or loss. Post-retirement Obligations The Company sponsors qualified defined benefit pension plans for ABX’s flight crewmembers and other eligible employees. The Company also sponsors non-qualified, unfunded excess plans that provide benefits to executive management and crewmembers that are in addition to amounts permitted to be paid through our qualified plans under provisions of the tax laws. Employees are no longer accruing benefits under any of the defined benefit pension plans. The Company also sponsors unfunded post-retirement healthcare plans for ABX’s flight crewmembers. The accounting and valuation for these post-retirement obligations are determined by prescribed accounting and actuarial methods that consider a number of assumptions and estimates. The selection of appropriate assumptions and estimates is significant due to the long time period over which benefits will be accrued and paid. The long term nature of these benefit payouts increases the sensitivity of certain estimates on our post-retirement costs. In actuarially valuing our pension obligations and determining related expense amounts, key assumptions include discount rates, expected long term investment returns, retirement ages and mortality. Actual results and future changes in these assumptions could result in future costs that are materially different than those recorded in our annual results of operations. Our actuarial valuation includes an assumed long term rate of return on pension plan assets of 6.25%. Our assumed rate of return is based on a targeted long term investment allocation of 30% equity securities, 65% fixed income securities and 5% cash. The actual asset allocation at December 31, 2017 was 31% equities, 68% fixed income and 1% cash. The pension trust includes $27.2 million of investments (4% of the plans' assets) whose fair values have been estimated in the absence of readily determinable fair values. Such investments include private equity, hedge fund investments and real estate funds. Management’s estimates are based on information provided by the fund managers or general partners of those funds. In evaluating our assumptions regarding expected long term investment returns on plan assets, we consider a number of factors, including our historical plan returns in connection with our asset allocation policies, assistance from investment consultants hired to provide oversight over our actively managed investment portfolio, and long term inflation assumptions. The selection of the expected return rate materially affects our pension costs. Our expected long term rate of return was 6.25% after analyzing expected returns on investment vehicles and considering our long term asset allocation expectations. Fluctuations in long-term interest rates can have an impact on the actual rate of return. If we were to lower our long term rate of return assumption by a hypothetical 100 basis points, expense in 2017 would be increased by approximately $6.7 million. We use a market value of assets as of the measurement date for determining pension expense. In selecting the interest rate to discount estimated future benefit payments that have been earned to date to their net present value (defined as the projected benefit obligation), we match the plan’s benefit payment streams to high- quality bonds of similar maturities. The selection of the discount rate not only affects the reported funded status information as of December 31 (as shown in Note I to the accompanying consolidated financial statements), but also affects the succeeding year’s pension and post-retirement healthcare expense. The discount rates selected for December 31, 2017, based on the method described above, were 4.00% for crewmembers and 4.05% for non- crewmembers. If we were to lower our discount rates by a hypothetical 50 basis points, pension expense in 2017 would be increased by approximately $7.3 million. Our mortality assumptions at December 31, 2017, reflect the most recent projections released by the Actuaries Retirement Plans Experience Committee, a committee within the Society of Actuaries, a professional association in North America. The assumed future increase in salaries and wages is not a significant estimate in determining pension costs because each defined benefit pension plan was frozen during 2009 with respect to additional benefit accruals. 41 The following table illustrates the sensitivity of the aforementioned assumptions on our pension expense, pension obligation and accumulated other comprehensive income (in thousands): Effect of change December 31, 2017 2017 Pension expense $ 6,734 $ Pension obligation Accumulated other comprehensive income (pre-tax) — — $ 7,338 14,072 (48,175) (48,175) 48,175 48,175 Change in assumption 100 basis point decrease in rate of return 50 basis point decrease in discount rate Aggregate effect of all the above changes New Accounting Pronouncements For information regarding recently issued accounting pronouncements and the expected impact on our annual statements, see Note A "SUMMARY OF FINANCIAL STATEMENT PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES" in the accompanying notes to Consolidated Financial Statements included in Part II, Item 8 of this Form 10-K. ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK The Company is exposed to market risk for changes in interest rates. The Company's Senior Credit Agreement requires the Company to maintain derivative instruments for fluctuating interest rates, for at least fifty percent of the outstanding balance of the unsubordinated term loan. Accordingly, in February 2016, the Company entered into an interest rate swap instrument. Additionally, the Company entered into another three interest rate swaps in February 2017, April 2017 and June 2017, respectively. As a result, future fluctuations in LIBOR interest rates will result in the recording of unrealized gains and losses on interest rate derivatives held by the Company. The combined notional values were $196.3 million as of December 31, 2017. See Note G in the accompanying consolidated financial statements for a discussion of our accounting treatment for these hedging transactions. As of December 31, 2017, the Company has $196.6 million of fixed interest rate convertible debt and $315.6 million of variable interest rate debt outstanding. Variable interest rate debt exposes us to differences in future cash flows resulting from changes in market interest rates. Variable interest rate risk can be quantified by estimating the change in annual cash flows resulting from a hypothetical 20% increase in interest rates. A hypothetical 20% increase or decrease in interest rates would have resulted in a change in interest expense of approximately $2.3 million for the year ended December 31, 2017. The convertible debt issued at fixed interest rates is exposed to fluctuations in fair value resulting from changes in market interest rates. Fixed interest rate risk can be quantified by estimating the increase in fair value of our long term convertible debt through a hypothetical 20% increase in interest rates. As of December 31, 2017, a 20% increase in interest rates would have decreased the fair value of our fixed interest rate convertible debt by approximately $0.2 million. The Company is exposed to concentration of credit risk primarily through cash deposits, cash equivalents, marketable securities and derivatives. As part of its risk management process, the Company monitors and evaluates the credit standing of the financial institutions with which it does business. The financial institutions with which it does business are generally highly rated. The Company is exposed to counterparty risk, which is the loss it could incur if a counterparty to a derivative contract defaulted. 42 As of December 31, 2017, the Company's liabilities reflected 14.83 million stock warrants issued to a customer. The fair value of the stock warrant obligation is re-measured at the end of each reporting period and marked to market. The fair value of the stock warrant is dependent on a number of factors which change, including the Company's common stock price, the volatility of the Company’s common stock and the risk-free interest rate. See Note D in the accompanying consolidated financial statements for further information about the fair value of the stock warrants The Company sponsors defined benefit pension plans and post-retirement healthcare plans for certain eligible employees. The Company's related pension expense, plans' funded status, and funding requirements are sensitive to changes in interest rates. The funded status of the plans and the annual pension expense is recalculated at the beginning of each calendar year using the fair value of plan assets. market-based interest rates at that point in time, as well as assumptions for asset returns and other actuarial assumptions. Higher interest rates could result in a lower fair value of plan assets and increased pension expense in the following years. At December 31, 2017, ABX's defined benefit pension plans had total investment assets of $681.6 million under investment management. See Note I in the accompanying consolidated financial statements for further discussion of these assets. The Company is exposed to market risk for changes in the price of jet fuel. The risk associated with jet fuel, however, is largely mitigated by reimbursement through the agreements with its customers. 43 ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA Index to Consolidated Financial Statements Report of Independent Registered Public Accounting Firm Consolidated Balance Sheets Consolidated Statements of Operations Consolidated Statements of Comprehensive Income Consolidated Statements of Cash Flows Consolidated Statements of Stockholders’ Equity Notes to Consolidated Financial Statements Page 45 46 47 48 49 50 51 44 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the stockholders and the Board of Directors of Air Transport Services Group, Inc. Opinion on the Financial Statements We have audited the accompanying consolidated balance sheets of Air Transport Services Group, Inc. and subsidiaries (the "Company") as of December 31, 2017 and 2016, the related consolidated statements of operations, comprehensive income, stockholders' equity, and cash flows, for each of the three years in the period ended December 31, 2017, and the related notes and the schedule listed in the Table of Contents at Item 15a (2) (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of 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 accounting principles generally accepted in the United States of America. We have also 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 (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 1, 2018, expressed an unqualified opinion on the Company's internal control over financial reporting. 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. Emphasis of a Matter As discussed in Note B to the consolidated financial statements, the Company's three principal customers account for a substantial portion of the Company's revenue. The Company's financial security is dependent on its ongoing relationship with its three principal customers existing as of December 31, 2017. /s/ DELOITTE & TOUCHE LLP Cincinnati, Ohio March 1, 2018 We have served as the Company's auditor since 2002. 45 AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (In thousands, except share data) ASSETS CURRENT ASSETS: Cash and cash equivalents Accounts receivable, net of allowance of $2,445 in 2017 and $1,264 in 2016 Inventory Prepaid supplies and other TOTAL CURRENT ASSETS Property and equipment, net Lease incentive Goodwill and acquired intangibles Convertible note hedges Other assets TOTAL ASSETS LIABILITIES AND STOCKHOLDERS’ EQUITY CURRENT LIABILITIES: Accounts payable Accrued salaries, wages and benefits Accrued expenses Current portion of debt obligations Unearned revenue TOTAL CURRENT LIABILITIES Long term debt Convertible note obligations Stock warrant obligations Post-retirement obligations Other liabilities Deferred income taxes TOTAL LIABILITIES Commitments and contingencies (Note H) STOCKHOLDERS’ EQUITY: December 31, December 31, 2017 2016 $ 32,699 109,114 22,169 20,521 184,503 1,159,962 80,684 44,577 53,683 25,435 $ 1,548,844 $ 16,358 77,247 19,925 19,123 132,653 1,000,992 54,730 45,586 — 25,369 $ 1,259,330 $ $ 99,728 40,127 10,455 18,512 15,850 184,672 497,246 54,359 211,136 61,355 45,353 99,444 1,153,565 60,704 37,044 10,324 29,306 18,407 155,785 429,415 — 89,441 77,713 52,542 122,532 927,428 Preferred stock, 20,000,000 shares authorized, including 75,000 Series A Junior Participating Preferred Stock Common stock, par value $0.01 per share; 85,000,000 shares authorized; 59,057,195 and 59,461,291 shares issued and outstanding in 2017 and 2016, respectively Additional paid-in capital Accumulated deficit Accumulated other comprehensive loss TOTAL STOCKHOLDERS’ EQUITY TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY — — 591 471,456 (13,748) (63,020) 395,279 $ 1,548,844 595 443,416 (32,243) (79,866) 331,902 $ 1,259,330 See notes to consolidated financial statements. 46 AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF OPERATIONS (In thousands, except per share data) REVENUES OPERATING EXPENSES Salaries, wages and benefits Depreciation and amortization Maintenance, materials and repairs Fuel Contracted ground and aviation services Travel Landing and ramp Rent Insurance Other operating expenses OPERATING INCOME OTHER INCOME (EXPENSE) Interest income Net gain (loss) on financial instruments Loss from non-consolidated affiliate Interest expense EARNINGS (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES INCOME TAX BENEFIT (EXPENSE) EARNINGS FROM CONTINUING OPERATIONS EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAXES NET EARNINGS BASIC EARNINGS (LOSS) PER SHARE Continuing operations Discontinued operations TOTAL BASIC EARNINGS PER SHARE DILUTED EARNINGS (LOSS) PER SHARE Continuing operations Discontinued operations TOTAL DILUTED EARNINGS PER SHARE WEIGHTED AVERAGE SHARES Basic Diluted Year Ended December 31 2016 768,870 $ $ 2017 $ 1,068,200 2015 619,264 282,211 154,556 141,575 149,579 147,092 27,390 22,271 13,629 4,820 31,782 974,905 93,295 116 (79,789) (3,135) (17,023) (99,831) 231,667 135,496 119,123 87,134 57,491 20,048 13,455 11,625 4,456 24,627 705,122 63,748 131 (18,107) — (11,318) (29,294) (6,536) 34,454 181,785 125,443 103,961 52,615 18,983 18,007 9,727 11,677 3,645 20,631 546,474 72,790 85 920 — (11,232) (10,227) 62,563 (13,394) (23,408) 28,276 21,740 (3,245) 21,060 2,428 $ $ $ $ $ 18,495 $ 23,488 $ 0.37 (0.06) 0.31 0.36 (0.05) 0.31 $ $ $ $ 0.34 0.04 0.38 0.33 0.04 0.37 $ $ $ $ 39,155 2,067 41,222 0.61 0.03 0.64 0.60 0.03 0.63 58,907 59,686 61,330 62,994 64,242 65,127 See notes to consolidated financial statements. 47 AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (In thousands) Years Ended December 31 2016 2017 2015 NET EARNINGS OTHER COMPREHENSIVE INCOME (LOSS): Defined Benefit Pension Defined Benefit Post-Retirement Gains and Losses on Derivatives Foreign Currency Translation $ 18,495 $ 23,488 $ 41,222 16,513 20,214 (16,111) 204 — 129 (986) — (82) 315 (4) (336) TOTAL COMPREHENSIVE INCOME (LOSS), net of tax $ 35,341 $ 42,634 $ 25,086 See notes to consolidated financial statements. 48 AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS (In thousands) Years Ended December 31 2016 2015 2017 OPERATING ACTIVITIES: Net earnings (loss) from continuing operations Net earnings (loss) from discontinued operations Adjustments to reconcile net earnings to net cash provided by operating activities: $ $ 21,740 (3,245) 21,060 2,428 $ 39,155 2,067 Depreciation and amortization Pension and post-retirement Deferred income taxes Amortization of stock-based compensation Amortization of DHL promissory note Net (gain) loss on financial instruments Changes in assets and liabilities: Accounts receivable Inventory and prepaid supplies Accounts payable Unearned revenue Accrued expenses, salaries, wages, benefits and other liabilities Pension and post-retirement assets Other NET CASH PROVIDED BY OPERATING ACTIVITIES INVESTING ACTIVITIES: Capital expenditures Proceeds from property and equipment Acquisitions and investments in businesses Redemption of long term deposits NET CASH (USED IN) INVESTING ACTIVITIES FINANCING ACTIVITIES: Principal payments on long term obligations Proceeds from borrowings Proceeds from convertible notes Payments for financing costs Purchase convertible note hedges Proceeds from issuance of warrants Purchase of common stock Withholding taxes paid for conversion of employee stock awards NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR CASH AND CASH EQUIVALENTS AT END OF PERIOD SUPPLEMENTAL CASH FLOW INFORMATION: Interest paid, net of amount capitalized Federal alternative minimum and state income taxes paid SUPPLEMENTAL NON-CASH INFORMATION: Accrued capital expenditures 170,751 20,933 (30,771) 3,632 — 79,789 (31,313) (4,107) 23,500 (7,331) 780 (13,083) 3,717 234,992 (296,939) 381 (11,792) 9,975 (298,375) (254,446) 115,000 258,750 (7,887) (56,097) 38,502 (11,184) (2,914) 79,724 16,341 16,358 32,699 13,693 1,938 25,142 $ $ $ $ $ $ $ $ 140,002 11,532 13,807 3,165 — 18,107 (9,597) (5,269) 5,603 (3,216) 5,678 (11,819) 1,611 193,092 125,443 6,920 23,691 2,454 (1,550) (920) (14,410) (3,896) 4,424 (1,116) 8,375 (16,098) 470 175,009 (264,477) 12,380 (17,395) — (269,492) (158,714) 6,841 — — (151,873) (44,069) 185,000 — — — — (63,570) (2,300) 75,061 (1,339) 17,697 16,358 10,738 923 9,118 (69,344) 45,000 — — — — (10,345) (1,310) (35,999) (12,863) 30,560 17,697 10,748 870 7,033 $ $ $ $ See notes to consolidated financial statements. 49 AIR TRANSPORT SERVICES GROUP, INC. CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (In thousands, except share data) Common Stock Number 64,854,950 Amount 649 $ Additional Paid-in Capital $ 526,669 Accumulated Deficit Accumulated Other Comprehensive Income (Loss) Total $ (96,953) $ (82,876) $ 347,489 BALANCE AT JANUARY 1, 2015 Stock-based compensation plans Grant of restricted stock Issuance of common shares, net of withholdings Forfeited restricted stock 170,800 137,457 (6,900) Purchase of common stock (1,079,167) Tax benefit from common stock compensation Amortization of stock awards and restricted stock Total comprehensive income (loss) BALANCE AT DECEMBER 31, 2015 Stock-based compensation plans 2 1 — (11) (2) (1,311) — (10,334) 783 2,454 64,077,140 $ 641 $ 518,259 $ Grant of restricted stock Issuance of common shares, net of withholdings Forfeited restricted stock 171,500 42,796 (4,600) 2 — — (2) (2,300) — Purchase of common stock (4,825,545) (48) (63,522) Tax benefit from common stock compensation Warrants granted to customer Amortization of stock awards and restricted stock Total comprehensive income (loss) BALANCE AT DECEMBER 31, 2016 Stock-based compensation plans 1,087 (13,271) 3,165 59,461,291 $ 595 $ 443,416 $ Grant of restricted stock Issuance of common shares, net of withholdings Forfeited restricted stock 113,000 17,441 (3,900) 1 — — (1) (2,914) — Purchase of common stock (530,637) (5) (11,179) Warrants issued Amortization of stock awards and restricted stock Total comprehensive income BALANCE AT DECEMBER 31, 2017 38,502 3,632 59,057,195 $ 591 $ 471,456 $ — (1,310) — (10,345) 783 41,222 (55,731) $ 2,454 (16,136) 25,086 (99,012) $ 364,157 — (2,300) — (63,570) 1,087 (13,271) 23,488 (32,243) $ 3,165 19,146 42,634 (79,866) $ 331,902 — (2,914) — (11,184) 38,502 18,495 (13,748) $ 3,632 35,341 16,846 (63,020) $ 395,279 See notes to consolidated financial statements. 50 AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS NOTE A—SUMMARY OF FINANCIAL STATEMENT PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Air Transport Services Group, Inc. is a holding company whose subsidiaries primarily operate within the airfreight and logistics industry. The Company leases aircraft and provides airline operations, ground services, aircraft modification and maintenance services and other support services mainly to the cargo transportation and package delivery industries. The Company's subsidiaries offer a range of complementary services to delivery companies, freight forwarders, airlines and government customers. The Company's leasing subsidiary, Cargo Aircraft Management, Inc. (“CAM”), leases aircraft to each of the Company's airlines as well as to non-affiliated airlines and other lessees. The airlines, ABX Air, Inc. (“ABX”) and Air Transport International, Inc. (“ATI”), each have the authority, through their separate U.S. Department of Transportation ("DOT") and Federal Aviation Administration ("FAA") certificates, to transport cargo worldwide. The Company provides air transportation services to a concentrated base of customers. The Company provides a combination of aircraft, crews, maintenance and insurance services for a customer's transportation network through customer "CMI" and "ACMI" agreements and through charter contracts in which aircraft fuel is also included. ATI provides passenger transportation to the U.S. Military using "combi" aircraft, which are certified to carry passengers as well as cargo on the main deck. In addition to its aircraft leasing and flight services the Company sells aircraft parts, provides aircraft maintenance and modification services, equipment maintenance services and manages mail and package sorting services for customers. Basis of Presentation The accompanying consolidated financial statements include the accounts of Air Transport Services Group, Inc. and its wholly-owned subsidiaries. Investments in an affiliate in which the Company has significant influence but does not exercise control are accounted for using the equity method of accounting. Using the equity method, the Company’s share of a nonconsolidated affiliate's income or loss is recognized in the consolidated statement of earnings and cumulative post-acquisition changes in the investment are adjusted against the carrying amount of the investment. Inter-company balances and transactions are eliminated. The financial statements of the Company are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). Revenues and operating expenses include the activities of PEMCO World Air Services, Inc., ("Pemco") a wholly owned subsidiary, for periods since its acquisition by the Company on December 30, 2016. Pemco offers aircraft maintenance and modification services. Certain historical expenses related to the Company's other aircraft maintenance and modification businesses have been reclassified from Other operating expenses to Maintenance, materials and repairs to conform with the current year presentation of the consolidated statements of operations. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. Estimates and assumptions are used to record allowances for uncollectible amounts, self-insurance reserves, spare parts inventory, depreciation and impairments of property, equipment, goodwill and intangibles, stock warrants and other financial instruments, post- retirement obligations, income taxes, contingencies and litigation. Changes in estimates and assumptions may have a material impact on the consolidated financial statements. Cash and Cash Equivalents The Company classifies short-term, highly liquid investments with maturities of three months or less at the time of purchase as cash and cash equivalents. These investments, consisting of money market funds, are recorded at cost, which approximates fair value. Substantially all deposits of the Company’s cash are held in accounts that exceed federally insured limits. The Company deposits cash in common financial institutions which management believes are financially sound. 51 Accounts Receivable and Allowance for Uncollectible Accounts The Company's accounts receivable is primarily due from its significant customers (see Note B), other airlines, the U.S. Postal Services ("USPS"), delivery companies and freight forwarders. The Company performs a quarterly evaluation of the accounts receivable and the allowance for uncollectible accounts by reviewing specific customers' recent payment history, growth prospects, financial condition and other factors that may impact a customer's ability to pay. The Company establishes an allowance for uncollectible accounts for probable losses due to a customer's potential inability or unwillingness to make contractual payments. Account balances are written off against the allowance when the Company ceases collection efforts. Inventory The Company’s inventory is comprised primarily of expendable aircraft parts and supplies used for aircraft maintenance. Inventory is generally charged to expense when issued for use on a Company aircraft. The Company values its inventory of aircraft parts and supplies at weighted-average cost and maintains a related obsolescence reserve. The Company records an obsolescence reserve on a base stock of inventory for each fleet type. The amortization of base stock for the obsolescence reserve corresponds to the expected life of each fleet type. Additionally, the Company monitors the usage rates of inventory parts and segregates parts that are technologically outdated or no longer used in its fleet types. Slow moving and segregated items are actively marketed and written down to their estimated net realizable values based on market conditions. Management analyzes the inventory reserve for reasonableness at the end of each quarter. That analysis includes consideration of the expected fleet life, amounts expected to be on hand at the end of a fleet life, and recent events and conditions that may impact the usability or value of inventory. Events or conditions that may impact the expected life, usability or net realizable value of inventory include additional aircraft maintenance directives from the FAA, changes in DOT regulations, new environmental laws and technological advances. Goodwill and Intangible Assets The Company assesses, during the fourth quarter of each year, the carrying value of goodwill. The first step of the assessment is the estimation of fair value of each reporting unit, which is compared to the carrying value. If step one indicates that impairment potentially exists, a second step is performed to measure the amount of impairment, if any. Goodwill impairment exists when the implied fair value of goodwill is less than its carrying value. The Company also conducts impairment assessments of goodwill, indefinite-lived intangible assets and finite-lived intangible assets whenever events or changes in circumstance indicate an impairment may have occurred. Finite-lived intangible assets are amortized over their estimated useful economic lives. Property and Equipment Property and equipment held for use is stated at cost, net of any impairment recorded. The cost and accumulated depreciation of disposed property and equipment are removed from the accounts with any related gain or loss reflected in earnings from operations. Depreciation of property and equipment is provided on a straight-line basis over the lesser of the asset’s useful life or lease term. Depreciable lives are summarized as follows: Boeing 767, 757 and 737 aircraft and flight equipment Ground equipment Leasehold improvements, facilities and office equipment 10 to 18 years 3 to 10 years 3 to 25 years The Company periodically evaluates the useful lives, salvage values and fair values of property and equipment. Acceleration of depreciation expense or the recording of significant impairment losses could result from changes in the estimated useful lives of assets due to a number of reasons, such as excess aircraft capacity or changes in regulations governing the use of aircraft. Aircraft and other long-lived assets are tested for impairment when circumstances indicate the carrying value of the assets may not be recoverable. To conduct impairment testing, the Company groups assets and liabilities at the 52 lowest level for which identifiable cash flows are largely independent of cash flows of other assets and liabilities. For assets that are to be held and used, impairment is recognized when the estimated undiscounted cash flows associated with the asset group is less than the carrying value. If impairment exists, an adjustment is recorded to write the assets down to fair value, and a loss is recorded as the difference between the carrying value and fair value. Fair values are determined considering quoted market values, discounted cash flows or internal and external appraisals, as applicable. For assets held for sale, impairment is recognized when the fair value less the cost to sell the asset is less than the carrying value. The Company’s accounting policy for major airframe and engine maintenance varies by subsidiary and aircraft type. The costs of airframe maintenance for Boeing 767-200 aircraft operated by ABX are expensed as they are incurred. The costs of major airframe maintenance for the Company's other aircraft are capitalized and amortized over the useful life of the overhaul. Many of the Company's General Electric CF6 engines that power the Boeing 767-200 aircraft are maintained under “power by the hour” and "power by the cycle" agreements with an engine maintenance provider. Further, in May 2017, the Company entered into similar maintenance agreements for certain General Electric CF6 engines that power many of the Company's Boeing 767-300 aircraft. Under these agreements, the engines are maintained by the service provider for a fixed fee per cycle and/or flight hour. As a result, the cost of maintenance for these engines is generally expensed as flights occur. Maintenance for the airlines’ other aircraft engines, including Boeing 767-300 and Boeing 757 aircraft, are typically contracted to service providers on a time and material basis and the costs of those engine overhauls are capitalized and amortized over the useful life of the overhaul. In the event the Company leases aircraft from external lessors, the Company may be required to make periodic payments to the lessor under certain aircraft leases for future maintenance events such as engine overhauls and major airframe maintenance. Such payments are recorded as deposits until drawn for qualifying maintenance costs. The maintenance costs are expensed or capitalized in accordance with the airline's accounting policy for major airframe and engine maintenance. The Company evaluates at the balance sheet date, whether it is probable that an amount on deposit will be returned by the lessor to reimburse the costs of the maintenance activities. When an amount on deposit is less than probable of being returned, it is recognized as additional maintenance expense. Capitalized Interest Interest costs incurred while aircraft are being modified are capitalized as an additional cost of the aircraft until the date the asset is placed in service. Capitalized interest was $1.8 million, $1.3 million and $0.2 million for the years ended December 31, 2017, 2016 and 2015, respectively. Discontinued Operations A business component whose operations are discontinued is reported as discontinued operations if the cash flows of the component have been eliminated from the ongoing operations of the Company and represents a strategic shift that had a major impact on the Company. The results of discontinued operations are aggregated and presented separately in the consolidated statements of operations. Self-Insurance The Company is self-insured for certain workers’ compensation, employee healthcare, automobile, aircraft, and general liability claims. The Company maintains excess claim coverage with common insurance carriers to mitigate its exposure to large claim losses. The Company records a liability for reported claims and an estimate for incurred claims that have not yet been reported. Accruals for these claims are estimated utilizing historical paid claims data and recent claims trends. Other liabilities included $18.4 million and $18.7 million at December 31, 2017 and December 31, 2016, respectively, for self-insured reserves. Changes in claim severity and frequency could result in actual claims being materially different than the costs accrued. Pension and Post-Retirement Benefits The funded status of any of the Company's defined benefits pension or post-retirement health care plan is the difference between the fair value of plan assets and the accumulated benefit obligations to plan participants. The over funded or underfunded status of a plan is reflected in the consolidated balance sheet as an asset for over funded plans, or as a liability for underfunded plans. 53 The funded status is ordinarily re-measured annually at year end using the fair value of plans assets, market based discount rates and actuarial assumptions. Changes in the funded status of the plans as a result of re-measuring plan assets and benefit obligations, are recorded to accumulated comprehensive loss and amortized into operating expense using a corridor approach. The Company's corridor approach amortizes variances in plan assets and benefit obligations that are a result of the previous measurement assumptions into earnings when the net deferred variances exceed 10% of the greater of the market value of plan assets or the benefit obligation at the beginning of the year. The amount in excess of the corridor is amortized over the average remaining service period to retirement date of active plan participants. Costs adjustments for plan amendments are also deferred and amortized over the expected working life or the life expectancy of plan participants. Irrevocable settlement transactions that relieve the Company from responsibilities of providing retiree benefits and significantly eliminate the Company's relate risk may result in recognition of gains or losses from accumulated other comprehensive loss. Security and Maintenance Deposits The Company's customer leases typically obligate the lessee to maintain the Company's aircraft in compliance with regulatory standards for flight and aircraft maintenance. The Company may require an aircraft lessee to pay a security deposit or provide a letter of credit until the expiration of the lease. Additionally, the Company's leases may require a lessee to make monthly payments toward future expenditures for scheduled heavy maintenance events. The Company records security and maintenance deposits in other liabilities. If a lease requires monthly maintenance payments, the Company is typically required to reimburse the lessee for costs they incur for scheduled heavy maintenance events after completion of the work and receipt of qualifying documentation. Reimbursements to the lessee are recorded against the previously paid maintenance deposits. Income Taxes Income taxes have been computed using the asset and liability method, under which deferred income taxes are provided for the temporary differences between the financial reporting basis and the tax basis of the Company’s assets and liabilities. Deferred taxes are measured using provisions of currently enacted tax laws. A valuation allowance against net deferred tax assets is recorded when it is more likely than not that such assets will not be fully realized. Tax credits are accounted for as a reduction of income taxes in the year in which the credit originates. All deferred income taxes are classified as noncurrent in the statement of financial position. The Company recognizes the benefit of a tax position taken on a tax return, if that position is more likely than not of being sustained on audit, based on the technical merits of the position. An uncertain income tax position is not recognized if it has less than a 50% likelihood of being sustained. The Company recognizes interest and penalties accrued related to uncertain tax positions in operating expense. Purchase of Common Stock The Company's Board of Directors has authorized management to repurchase outstanding common stock of the Company from time to time on the open market or in privately negotiated transactions. The authorization does not require the Company to repurchase a specific number of shares and the Company may terminate the repurchase program at any time. Upon the retirement of common stock repurchased, the excess purchase price over the par value for retired shares of common stock is recorded to additional paid-in-capital. Stock Warrants The Company’s accounting for warrants issued to a lessee is determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. The warrants issued to lessee are recorded as a lease incentive asset using their fair value at the time that the lessee has met its performance obligation. The lease incentive is amortized against revenues over the duration of related aircraft leases. The unexercised warrants are classified in liabilities and re-measured to fair value at the end of each reporting period, resulting in a non-operating gain or loss. 54 Comprehensive Income Comprehensive income includes net earnings and other comprehensive income or loss. Other comprehensive income or loss results from certain changes in the Company’s liabilities for pension and other post-retirement benefits, gains and losses associated with interest rate hedging instruments and fluctuations in currency exchange rates related to the foreign affiliate. Fair Value Information Assets or liabilities that are required to be measured at fair value are reported using the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. FASB ASC Topic 820-10 Fair Value Measurements and Disclosures establishes three levels of input that may be used to measure fair value: • • • Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include items where the determination of fair value requires significant management judgment or estimation. Revenue Recognition Aircraft lease revenues are recognized as operating lease revenues on a straight-line basis over the term of the applicable lease agreements. Revenues generated from airline service agreements are typically recognized based on hours flown or the amount of aircraft and crew resources provided during a reporting period. Certain agreements include provisions for incentive payments based upon on-time reliability. These incentives are typically measured on a monthly basis and recorded to revenue in the corresponding month earned. Revenues for operating expenses that are reimbursed through airline service agreements, including consumption of aircraft fuel, are generally recognized as the costs are incurred. Revenues from charter service agreements are recognized on scheduled and non-scheduled flights when the specific flight has been completed. Revenues from the sale of aircraft parts and engines are recognized when the parts are delivered. Revenues earned and expenses incurred in providing aircraft-related maintenance, repair or modification services are usually recognized in the period in which the services are completed and delivered to the customer. Revenues derived from sorting parcels are recognized in the reporting period in which the services are performed. Revenue is not recognized until collectibility is reasonably assured. Accounting Standards Updates In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” ("Topic 606”) to supersede existing revenue recognition guidance. During 2016, the FASB issued additional ASU's to further amend the new revenue recognition guidance. Topic 606 is a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and about assets recognized for costs incurred to obtain or fulfill a contract. The new revenue recognition standards are effective for annual reporting periods beginning after December 15, 2017 with earlier adoption permitted for reporting periods beginning after December 15, 2016. Topic 606 may be adopted using either a full retrospective approach, under which all years included in the financial statements will be presented under the revised guidance, or a modified retrospective approach, under which financial statements will be prepared under the revised guidance for the year of adoption, but not for prior years. Under the latter method, entities 55 recognize a cumulative catch-up adjustment to the opening balance of retained earnings at the effective date for open contract performance at that time. The Company is adopting the standard effective January 1, 2018, using the modified retrospective method. The Company's adoption efforts have included the identification of revenue within the scope of the standard, the evaluation of customer contracts in conjunction with new guidance and an assessment of the qualitative and quantitative impacts of the new standard on its financial statements. The evaluation included the application of each of the five steps identified in the Topic 606 revenue recognition model. The Company determined that under Topic 606, it is an agent for aircraft fuel and certain other costs reimbursed by customers under its ACMI and CMI contracts and for certain cargo handling services that it arranges for a customer. Under the new revenue standard, such reimbursed amounts will be reported net of the corresponding expenses beginning in 2018. This application of Topic 606 will not have an impact on the Company's reported earnings in any period. Additionally under Topic 606, the Company will be required to record revenue over time, instead of at the time of completion, for certain customer contracts for airframe and modification services that do not have an alternative use and for which the Company has an enforceable right to payment during the service cycle. The Company is adopting the provisions of this new standard using the modified retrospective method which requires the Company to record a one time adjustment to retained deficit for the cumulative effect that the standard has on open contracts at the time of adoption. The Company estimates that upon adoption of the new standard, it will accelerate approximately $3.6 million of revenue resulting in immaterial adjustment to its January 1, 2018 retained deficit for open airframe and modification services contracts. The Company's lease revenues within the scope of ASC 840, Leases, are specifically excluded from Topic 606. In February 2016, the FASB issued ASU "Leases (Topic 842)" ("ASU 2016-02"), which will require the recognition of right to-use-assets and lease liabilities for leases previously classified as operating leases by lessees. The standard will take effect for annual reporting periods beginning after December 15, 2018, including interim reporting periods. Early application will be permitted for all entities. In addition, the FASB has decided to require a lessee to apply a modified retrospective transition approach for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements (the date of initial application). The modified retrospective approach would not require any transition accounting for leases that expired before the date of initial application. The Company is currently evaluating the impact of the standard on its financial statements and disclosures. In January 2017, the FASB issued ASU "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" ("ASU 2017-04"). ASU 2017-04 will simplify the subsequent measurement of goodwill by eliminating the second step from the goodwill impairment test. ASU 2017-04 would require applying a one-step quantitative test and recording the amount of goodwill impairment as the excess of the reporting unit's carrying value over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit. ASU 2017-04 does not amend the optional qualitative assessment of goodwill impairment. The amendments in ASU 2017-04 are effective for annual or any interim goodwill impairment tests for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect the new standard to have a material impact on its financial statements and disclosures. In March 2017, the FASB issued ASU "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost "(ASU 2017-07"). ASU 2017-07 requires an employer to report the service cost component of retiree benefits in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented separately from the service cost component and outside a subtotal of income from operations. ASU 2017-07 is effective for years, and interim periods within those years, beginning after December 15, 2017, and requires retrospective application to all periods presented. This ASU will impact the Company's Operating Income subtotal as reported in the Company's Consolidated Statement of Operations by excluding interest expense, investment returns, settlements and other non-service cost components of retiree benefit expenses. Information about interest expense, investment returns and other components of retiree benefit expenses can be found in Note I. In February 2018, the FASB issued ASU “Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income" ("ASU 2018-02"). ASU 2018-02 amends ASC 220, Income Statement — Reporting Comprehensive Income, to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from U.S. federal tax legislation known as the Tax Cuts and Jobs Act. In addition, 56 under the ASU 2018-02, a Company will be required to provide certain disclosures regarding stranded tax effects. ASU 2018-02 is effective for years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact of the standard on its financial statements and disclosures NOTE B—SIGNIFICANT CUSTOMERS DHL The Company has had long term contracts with DHL Network Operations (USA), Inc. and its affiliates ("DHL") since August 2003. Revenues from aircraft leases and related services performed for DHL were approximately 24%, 34% and 46% of the Company's consolidated revenues from continuing operations for the years ended December 31, 2017, 2016 and 2015, respectively. The Company’s balance sheets include accounts receivable with DHL of $15.7 million and $7.3 million as of December 31, 2017 and December 31, 2016, respectively. The Company leases Boeing 767 aircraft to DHL under both long-term and short-term lease agreements. Under a separate crew, maintenance and insurance (“CMI”) agreement, the Company operates Boeing 767 aircraft that DHL leases from the Company. Pricing for services provided through the CMI agreement is based on pre-defined fees, scaled for the number of aircraft operated and the number of flight crews provided to DHL for its U.S. network. The Company provides DHL with scheduled maintenance services for aircraft that DHL leases. The Company also provides Boeing 767 and Boeing 757 air cargo transportation services for DHL through additional ACMI agreements in which the Company provides the aircraft, crews, maintenance and insurance under a single contract. Revenues generated from the ACMI agreements are typically based on hours flown. The Company also provides ground equipment, such as power units, air starts and related maintenance services to DHL under separate agreements. Amazon The Company has been providing freighter aircraft and services for cargo handling and logistical support for Amazon.com Services, Inc. ("ASI"), successor to Amazon Fulfillment Services, Inc., a subsidiary of Amazon.com, Inc. ("Amazon") since September 2015. On March 8, 2016, the Company entered into an Air Transportation Services Agreement (the “ATSA”) with ASI, pursuant to which CAM leases 20 Boeing 767 freighter aircraft to ASI, including 12 Boeing 767-200 freighter aircraft for a term of five years and eight Boeing 767-300 freighter aircraft for a term of seven years. The ATSA also provides for the operation of those aircraft by the Company’s airline subsidiaries, and the management of ground services by the Company's subsidiary LGSTX Services Inc. ("LGSTX"). The ATSA became effective on April 1, 2016 and has a term of five years. CAM owns all 20 of the Boeing 767 aircraft that are leased and operated under the ATSA. Revenues from continuing operations performed for Amazon comprised approximately 44%, 29% and 5% of the Company's consolidated revenues from continuing operations for the years ending December 31, 2017, 2016 and 2015, respectively. The Company’s balance sheets include accounts receivable with Amazon of $44.2 million and $24.6 million as of December 31, 2017 and December 31, 2016, respectively. In conjunction with the execution of the ATSA, the Company and Amazon entered into an Investment Agreement and a Stockholders Agreement on March 8, 2016. The Investment Agreement calls for the Company to issue warrants in three tranches which will grant Amazon the right to acquire up to 19.9% of the Company’s outstanding common shares as described below. The first tranche of warrants, issued upon execution of the Investment Agreement, granted Amazon the right to purchase approximately 12.81 million ATSG common shares, including the right to purchase 7.69 million common shares vesting upon issuance on March 8, 2016, and the right to purchase the remaining 5.12 million common shares vesting as the Company delivered additional aircraft leased under the ATSA, or as the Company achieved specified revenue targets in connection with the ATSA. The second tranche of warrants grants Amazon a right to purchase approximately 1.59 million ATSG common shares, and will be issued and vest on March 8, 2018. The third tranche of warrants will be issued and vest on September 8, 2020. The third tranche of warrants will grant Amazon the right to purchase such additional number of ATSG common shares as is necessary to bring Amazon’s ownership to 19.9% of the Company’s pre-transaction outstanding common shares measured on a GAAP-diluted basis, adjusted for share issuances and repurchases by the Company following the date of the Investment Agreement and after giving effect to the warrants granted. The exercise price of the warrants is $9.73 per share, which represents the closing price of ATSG’s common shares on February 9, 2016. Each of the three tranches of warrants will be exercisable in accordance 57 with its terms through March 8, 2021. The Company anticipates making available the common shares required for the underlying warrants through a combination of share repurchases and the issuance of additional shares. The Company’s accounting for the warrants has been determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. The warrants issued to Amazon as of March 8, 2016, were recorded to stockholders equity, having a fair value of $4.89 per share. At that time, the fair value of the 7.69 million vested warrants issued to Amazon was recorded as a lease incentive asset and is being amortized against revenues over the duration of the aircraft leases. On May 12, 2016, the Company’s stockholders approved an amendment to the Certificate of Incorporation of the Company at the annual meeting of stockholders to increase the number of authorized common shares and to approve the warrants in full as required under the rules of the Nasdaq Global Select Market. The stockholders' approval enabled features of the warrants that required the vested warrants of the first tranche and the warrants of the second and third tranches to be classified as financial instruments as of May 12, 2016. Accordingly, the fair value of those warrants was measured and classified in liabilities on that date. Since May 12, 2016, 5.1 million additional warrants vested in conjunction with the execution of eight aircraft leases. As of December 31, 2017, the Company's liabilities reflected 14.83 million warrants having a fair value of $14.24 per share. During 2017, the re-measurements of the warrants to fair value resulted in a non-operating loss of $81.8 million before the effect of income taxes. The Company's earnings in future periods will be impacted by the number of warrants granted, the re-measurements of warrant fair value, amortizations of the lease incentive asset and the related income tax effects. For income tax calculations, the value and timing of related tax deductions will differ from the guidance described above for financial reporting. U.S. Military A substantial portion of the Company's revenues are also derived from the U.S. Military. The U.S. Military awards flights to U.S. certificated airlines through annual contracts and through temporary "expansion" routes. Revenues from services performed for the U.S. Military were approximately 7%, 12% and 16% of the Company's total revenues from continuing operations for the years ended December 31, 2017, 2016 and 2015, respectively. The Company's balance sheets included accounts receivable with the U.S. Military of $6.7 million and $7.0 million as of December 31, 2017 and December 31, 2016, respectively. NOTE C—GOODWILL, INTANGIBLES AND EQUITY INVESTMENTS As of December 31, 2017, 2016 and 2015, the goodwill amount for CAM was tested for impairment. To perform the first step of the goodwill impairment test, the Company determined the fair value of CAM using industry market multiples and discounted cash flows utilizing a market-derived rate of return (level 3 fair value inputs). The goodwill included in the CAM segment was not impaired. On December 30, 2016, the Company purchased 100% of the outstanding stock of Pemco for cash consideration in a debt-free acquisition. Pemco offers aircraft maintenance, repair, and overhaul services as well as aircraft modification services to its customers. The Company operates Pemco as a division of its existing aircraft maintenance businesses. The purchase price was allocated to tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess purchase price over the estimated fair value of net assets acquired was recorded as goodwill and reflects the strategic value of marketing Pemco's aircraft conversion capabilities and current aircraft hangar operations with the Company's air transportation solutions. Identified intangible assets include Supplemental Type Certificates ("STCs") granting approval by FAA for Pemco to market and complete certain aircraft modifications. As of December 31, 2017, the goodwill amount for Pemco was tested for impairment. To perform the first step of the goodwill impairment test, the Company determined the fair value of Pemco using industry market multiples and discounted cash flows utilizing a market-derived rate of return (level 3 fair value inputs). The goodwill recorded from the Pemco acquisition was not impaired. 58 The carrying amounts of goodwill are as follows (in thousands): Carrying value as of December 31, 2015 Acquisition of Pemco Carrying value as of December 31, 2016 Purchase price adjustment Carrying value as of December 31, 2017 CAM All Other Total $ $ $ 34,395 — 34,395 — 34,395 $ $ $ — $ 2,738 2,738 146 2,884 $ $ 34,395 2,738 37,133 146 37,279 The Company's acquired intangible assets are as follows (in thousands): Carrying value as of December 31, 2015 Acquisition of Pemco Amortization Carrying value as of December 31, 2016 Amortization Carrying value as of December 31, 2017 Airline Amortizing Certificates Intangibles Total $ $ $ 3,000 $ 1,334 $ — — 3,000 — 3,000 $ $ 4,400 (281) 5,453 (1,155) 4,298 $ $ 4,334 4,400 (281) 8,453 (1,155) 7,298 The airline certificates have an indefinite life and therefore are not amortized. The Company amortizes finite- lived intangibles assets, including customer relationship and STC intangibles, over 4 to 7 years. The Company recorded intangible amortization expense of $1.2 million, $0.3 million and $0.3 million for the years ending December 31, 2017, 2016 and 2015, respectively. Estimated amortization expense for the next five years is $1.2 million, $1.2 million, $1.1 million, $0.3 million and $0.3 million. Stock warrants issued to a lessee (see Note B) as an incentive are recorded as a lease incentive asset using their fair value at the time that the lessee has met its performance obligation and amortized against revenues over the duration of related aircraft leases. The Company's lease incentive granted to the lessee was as follows (in thousands): Carrying value as of December 31, 2015 Warrants granted Amortization Carrying value as of December 31, 2016 Warrants granted Amortization Carrying value as of December 31, 2017 Lease Incentive $ $ $ — 59,236 (4,506) 54,730 39,940 (13,986) 80,684 The lease incentive began to amortize in April 2016, with the commencement of certain aircraft leases. Based on the warrants granted as of December 31, 2017, the Company expects to record amortization, as a reduction to the lease revenue, of $16.9 million, $16.9 million, $16.9 million, $11.7 million and $8.3 million for each of the next five years ending December 31, 2022. In January 2014, the Company acquired a 25 percent equity interest in West Atlantic AB of Gothenburg, Sweden ("West"). West, through its two airlines, Atlantic Airlines Ltd. and West Air Sweden AB, operates a fleet of aircraft on behalf of European regional mail carriers and express logistics providers. The airlines operate a combined fleet of British Aerospace ATPs, Bombardier CRJ-200-PFs, and Boeing 767 and 737 aircraft. West leases three Boeing 767 aircraft and one Boeing 737 from the Company. The Company’s carrying value of West was $7.1 million and $9.9 59 million at December 31, 2017 and 2016, respectively, including $5.5 million of excess purchase price over the Company's fair value of West's nets assets in January of 2014. In 2017, the Company paid $2.4 million to West and entered into a preferred equity instrument. The Company's equity interest and the preferred equity instrument are reflected in “Other Assets” in the Company’s consolidated balance sheets as of December 31, 2017 and 2016. On August 3, 2017 the Company entered into a joint-venture agreement with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. The Company anticipates approval of a supplemental type certificate from the FAA in 2019. The Company expects to make contributions equal to its 49% ownership percentage of the program's total costs over the next two years. During 2017, the company contributed $8.7 million to the joint venture. The Company accounts for its investment in the joint venture under the equity method of accounting, in which the carrying value of the investment is reduced for the Company's share of the joint ventures operating losses. The carrying value of the joint venture, reflected in “Other Assets” in the Company’s consolidated balance sheets, was $5.6 million at December 31, 2017. The Company monitors its investments in affiliates for indicators of other-than-temporary declines in value on an ongoing basis in accordance with GAAP. If the Company determines that an other-than-temporary decline in value has occurred, it recognizes an impairment loss, which is measured as the difference between the recorded carrying value and the fair value of the investment. The fair value is generally determined using an income approach based on discounted cash flows or using negotiated transaction values. NOTE D—FAIR VALUE MEASUREMENTS The Company’s money market funds and interest rate swaps are reported on the Company’s consolidated balance sheets at fair values based on market values from identical or comparable transactions. The fair value of the Company’s money market funds, stock warrant obligations, convertible note, convertible note hedges and interest rate swaps are based on observable inputs (Level 2) from comparable market transactions. The fair value of the stock warrant obligations were determined using a Black-Scholes pricing model which considers the Company’s common stock price and various assumptions, such as the volatility of the Company’s common stock, the expected dividend yield, and the risk-free interest rate. The fair value of the note conversion obligations and the convertible note hedges were estimated using a Black-Scholes pricing model and incorporate the terms and conditions of the underlying financial instruments. The valuations are, among other things, subject to changes in both the Company's credit worthiness and the counter- parties to the instruments as well as change in general market conditions. While the change in fair value of the note conversion obligations and the convertible note hedges are generally expected to move in opposite directions, the net change in any given period may be material. The following table reflects assets and liabilities that are measured at fair value on a recurring basis (in thousands): As of December 31, 2017 Fair Value Measurement Using Level 1 Level 2 Level 3 Total Assets Cash equivalents—money market Interest rate swap Convertible note hedges Total Assets Liabilities Note conversion obligations Stock warrant obligations Total Liabilities $ $ $ — $ 1,326 $ — $ — — 1,840 53,683 — — — $ 56,849 $ — $ 1,326 1,840 53,683 56,849 — — — $ (54,359) (211,136) (265,495) $ — — — $ (54,359) (211,136) (265,495) 60 As of December 31, 2016 Fair Value Measurement Using Level 1 Level 2 Level 3 Total Assets Cash equivalents—money market Interest rate swap Total Assets Liabilities Interest rate swap Stock warrant obligation Total Liabilities $ $ $ $ — $ — — $ — $ — — $ 482 547 1,029 $ $ (77) $ (89,441) (89,518) $ — $ — — $ — $ — — $ 482 547 1,029 (77) (89,441) (89,518) At December 31, 2017 each stock warrant was valued at $14.24 using a risk-free interest rate of 2.0% and a stock volatility of 34%, based on the time period corresponding with the expiration period of the warrants (see Note B). At December 31, 2016, each stock warrant was valued at $8.09 using a risk-free rate of 1.7% and a stock volatility of 37.5%. At December 31, 2017 the value of the convertible note hedges and note conversion obligations were valued using a risk free interest rate of 2.3% and stock volatility of 34%. As a result of lower market interest rates compared to the stated interest rates of the Company’s fixed rate debt obligations, the fair value of the Company’s debt obligations, based on Level 2 observable inputs, was approximately $9.1 million more than the carrying value, which was $515.8 million at December 31, 2017. As of December 31, 2016, the fair value of the Company’s debt obligations was approximately $0.2 million more than the carrying value, which was $458.7 million. The non-financial assets, including goodwill, intangible assets and property and equipment are measured at fair value on a non-recurring basis. NOTE E—PROPERTY AND EQUIPMENT The Company's property and equipment consists primarily of cargo aircraft, aircraft engines and other flight equipment. Property and equipment, to be held and used, is summarized as follows (in thousands): Flight equipment Ground equipment Leasehold improvements, facilities and office equipment Aircraft modifications and projects in progress Accumulated depreciation Property and equipment, net $ December 31, 2017 1,801,808 53,523 26,897 121,760 2,003,988 (844,026) 1,159,962 $ $ December 31, 2016 1,541,872 49,229 27,364 113,518 1,731,983 (730,991) 1,000,992 $ CAM owned aircraft with a carrying value of $697.4 million and $524.3 million that were under leases to external customers as of December 31, 2017 and 2016, respectively. Minimum future payments from external customers for leased aircraft and equipment as of December 31, 2017 is scheduled to be $146.6 million, $111.0 million, $95.1 million, $76.6 million and $63.0 million for each of the next five years ending December 31, 2022. The Company’s accounting policy for major airframe and engine maintenance varies by subsidiary and aircraft type. The costs of airframe maintenance for Boeing 767-200 operated by ABX are expensed as they are incurred. The costs of major airframe maintenance for the Company's other aircraft are capitalized and amortized over the useful life of the overhaul. Many of the Company's General Electric CF6 engines that power the Boeing 767-200 aircraft are maintained under “power by the hour” and "power by the cycle" agreements with an engine maintenance provider. Further, in May 2017, the Company entered into similar maintenance agreements for certain General Electric CF6 engines that power many of the Company's Boeing 767-300 aircraft. Under these agreements, the engines are maintained by the service provider for a fixed fee per cycle and/or flight hour. As a result, the cost of maintenance for these engines 61 is generally expensed as flights occur. During their term, these maintenance agreements contain provisions for a minimum level of flight activity. Maintenance for the airlines’ other aircraft engines, including those powering Boeing 757 aircraft, are typically contracted to service providers on a time and material basis and the costs of those engine overhauls are capitalized and amortized over the useful life of the overhaul. NOTE F—DEBT OBLIGATIONS Debt obligations consisted of the following (in thousands): December 31, December 31, 2017 2016 Unsubordinated term loan Revolving credit facility Aircraft loans Convertible debt Total debt obligations Less: current portion $ 70,568 $ 245,000 3,640 196,550 515,758 (18,512) 497,246 $ 85,636 355,000 18,085 — 458,721 (29,306) 429,415 Total long term obligations, net $ The Company executed a syndicated credit agreement ("Senior Credit Agreement") in May 2011 which includes an unsubordinated term loan and a revolving credit facility. Effective March 31, 2017, the Company executed an amendment to the Senior Credit Agreement that extended the maturity of the term loan and revolving credit facility to May 30, 2022, increased the capacity of the revolving credit facility by $120.0 million to $545.0 million and preserved the accordion feature such that the Company can now draw up to an additional $100.0 million subject to the lenders' consent. Each year, through May 6, 2019, the Company may request a one year extension of the final maturity date, subject to the lenders' consent. In September 2017, the Company executed amendments to the Senior Credit Agreement. These amendments increased the revolving credit facility's permitted additional indebtedness to $300.0 million for convertible notes described below. The amendments also increased the amount of dividends the Company can pay and the amount of common stock it can repurchase to $100.0 million during any calender year, provided the Company's total secured debt to earnings before interest, taxes, depreciation and amortization expenses ("EBITDA") ratio is under 3.00 times, after giving effect to the dividend or repurchase. As of December 31, 2017, the unused revolving credit facility totaled $290.7 million, net of draws of $245.0 million and outstanding letters of credit of $9.3 million. The Senior Credit Agreement is collateralized by certain of the Company's Boeing 767 and 757 aircraft that are not collateralized under aircraft loans. Under the terms of the Senior Credit Agreement, the Company is required to maintain collateral coverage equal to 125% of the outstanding balance of the term loan and the maximum capacity of revolving credit facility or 150% of the outstanding balance of the term loan and the total funded revolving credit facility, whichever is less. The minimum collateral coverage which must be maintained is 50% of the outstanding balance of the term loan plus the revolving credit facility commitment which was $545.0 million. The balance of the unsubordinated term loan is net of debt issuance costs of $0.7 million and $0.6 million for the years ended December 31, 2017 and 2016, respectively. Under the terms of the Senior Credit Agreement, interest rates are adjusted quarterly based on the Company's EBITDA, its outstanding debt level and prevailing LIBOR or prime rates. At the Company's current debt-to-EBITDA ratio, the LIBOR based financing for the unsubordinated term loan and revolving credit facility bear a variable interest rate of 3.07% and 3.07%, respectively. The aircraft loan is collateralized by one aircraft, and amortizes monthly with a balloon payment of approximately 20% with a maturity in early 2018. The interest rates on the aircraft loan is 6.74% per annum payable monthly. The aircraft loan was paid off by the Company in January 2018. The Senior Credit Agreement contains covenants including, among other things, limitations on certain additional indebtedness, guarantees of indebtedness, as well as a total debt to EBITDA ratio and a fixed charge coverage ratio. The Senior Credit Agreement stipulates events of default, including unspecified events that may have material adverse 62 effects on the Company. If an event of default occurs, the Company may be forced to repay, renegotiate or replace the Senior Credit Agreement. In September 2017, the Company issued $258.8 million aggregate principal amount of 1.125% Convertible Senior Notes due 2024 ("Notes") in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act. The Notes bear interest at a rate of 1.125% per year payable semi-annually in arrears on April 15 and October 15 each year, beginning April 15, 2018. The Notes mature on October 15, 2024, unless repurchased or converted in accordance with their terms prior to such date. The Notes are unsecured indebtedness, subordinated to the Company's existing and future secured indebtedness and other liabilities, including trade payables. Conversion of the Notes can only occur upon satisfaction of certain conditions and during certain periods, beginning any calendar quarter commencing after December 31, 2017 and thereafter, until the close of business on the second scheduled trading day immediately preceding the maturity date. Upon the occurrence of certain fundamental changes, holders of the Notes can require the Company to repurchase their notes at the cash repurchase price equal to the principal amount of the notes, plus any accrued and unpaid interest. Until the Company's shareholders increase the number of authorized shares of common stock to cover the full number of shares underlying the Notes, the Company is required to settle conversions solely in cash. If the number of authorized shares is increased, the Notes may be settled in cash, the Company’s common shares or a combination of cash and the Company’s common shares, at the Company’s election. The initial conversion rate is 31.3475 common shares per $1,000 principal amount of Notes (equivalent to an initial conversion price of approximately $31.90 per common share). If a “make-whole fundamental change” (as defined in the offering circular with the Notes) occurs, the Company will, in certain circumstances, increase the conversion rate for a specified period of time. The Company evaluated the conversion features of the Notes under the applicable accounting guidance including ASC 815, "Derivatives and Hedging," and determined that the conversion features require separate accounting as a derivative. At the time of issuance, the fair value of this derivative was recorded on the balance sheet as the note conversion obligations (a long-term liability) and an offsetting discount to the Notes. Until the Company's shareholders increase the number of authorized shares of common stock, the note conversion obligations will be adjusted to reflect its fair value at the end of each quarter. The fair value of the note conversion obligation at issuance was $57.4 million. The fair value of the note conversion obligations at December 31, 2017 was $54.4 million and resulted in a non-operating gain of $3.0 million before the effect of income tax during 2017. The net proceeds from the issuance of the Notes were approximately $252.3 million, after deducting initial issuance costs. These unamortized issuance costs and discount are being amortized to interest expense through October 2024, using an effective interest rate of approximately 5.15%. The carrying value of the Company's Convertible debt is shown below. Principal value, Convertible Senior Notes, due 2024 Unamortized issuance costs Unamortized discount Convertible debt December 31, 2017 258,750 (6,685) (55,515) 196,550 In conjunction with the offering of the Notes, the Company purchased convertible note hedges under privately negotiated transactions for $56.1 million. These transactions cover, subject to customary anti-dilution adjustments, the number of the Company’s common shares that initially underlie the Notes, and are expected to reduce the potential equity dilution with respect to our common stock, and/or offset any cash payments in excess of the principal amount due, as the case may be, upon conversion of the Notes. The initial strike price of the convertible note hedges is $31.90 per share. The Company evaluated the convertible note hedges under the applicable accounting guidance, including ASC 815, "Derivatives and Hedging," and determined that the convertible note hedges should be accounted for as derivatives. These derivatives were capitalized on the balance sheet as long-term assets and are adjusted to reflect their fair value at the end of the quarter. The fair value of the convertible note hedges at December 31, 2017 was $53.7 million. As of December 31, 2017, the re-measurement of the convertible note hedges to fair value resulted in a non- operating loss of $2.4 million before the effect of income tax. 63 In conjunction with the offering of the Notes, the Company also sold warrants to the convertible note hedge counterparties in separate, privately negotiated warrant transactions at a higher strike price and for the same number of the Company’s common shares, subject to customary anti-dilution adjustments. The warrants could have a dilutive effect on the Company’s outstanding common shares and the Company’s earnings per share to the extent that the traded market price of the Company’s common shares exceeds the strike price of the warrants which is $41.35 per share and is subject to certain adjustments under the terms of the warrant transactions. The Company evaluated the warrants under the applicable accounting guidance, including ASC 815 "Derivatives and Hedging," and determined that the warrants meet the definition of a derivative. However, because these warrants have been determined to be indexed to the Company's own stock and meet the criteria for equity classification, they have been recorded in shareholder's equity. In the event these warrants are exercised, the Company has enough authorized and unissued shares for their issuance. The amount paid for these warrants and recorded in Stockholders' Equity in the Company’s consolidated balance sheets was $38.5 million. Taken together, the convertible note hedge and warrant transactions are intended to limit, during Notes conversion events, the dilution of the Company's common shares until the traded market price exceeds $41.35. The scheduled cash principal payments for the Company's debt obligations, as of December 31, 2017, for the next five years are as follows (in thousands): 2018 2019 2020 2021 2022 2023 and beyond Total principal cash payments Less: unamortized issuance costs and discounts Total debt obligations NOTE G—DERIVATIVE INSTRUMENTS Principal Payments 18,640 15,000 15,000 15,000 256,250 258,750 578,640 (62,882) 515,758 $ $ The Company's Senior Credit Agreement requires the Company to maintain derivative instruments for protection from fluctuating interest rates, for at least fifty percent of the outstanding balance of the term loan. Accordingly, the Company entered into interest rate swaps. The Company entered into two new interest rate swaps in February 2017 and April 2017, respectively, having initial values of $39.4 million and $50.0 million, respectively, and forward start dates of June 30, 2017. The Company also entered into a new interest rate swap in July 2017, having an initial value of $75.0 million and a forward start date of December 31, 2017. The table below provides information about the Company’s interest rate swaps (in thousands): Expiration Date June 30, 2017 May 5, 2021 May 30, 2021 March 31, 2022 March 31, 2022 December 31, 2017 December 31, 2016 Stated Interest Rate Notional Amount Market Value (Liability) Notional Amount Market Value (Liability) 1.183% 1.090% 1.703% 1.900% 1.950% — 35,625 35,625 50,000 75,000 — 719 240 416 465 43,125 43,125 — — — (77) 547 — — — The outstanding interest rate swaps are not designated as hedges for accounting purposes. The effects of future fluctuations in LIBOR interest rates on derivatives held by the Company will result in the recording of unrealized gains 64 and losses into the statement of operations. The Company recorded net gains on derivatives of $1.4 million, $1.0 million and $0.9 million for the years ending December 31, 2017, 2016 and 2015, respectively. The liability for outstanding derivatives is recorded in other liabilities and in accrued expenses. During September 2017, the Company issued convertible debt in the form of the Notes and recorded a long-term liability representing the Note conversion liability. In conjunction with the Notes, the Company purchased convertible note hedges having the same number of the Company’s common shares, 8.1 million shares, and same strike price of $31.90, that underlie the Notes. The convertible note hedges are expected to reduce the potential equity dilution with respect to the Company's common stock, and/or offset any cash payments in excess of the principal amount due, as the case may be, upon conversion of the Notes. The Company recorded a net gain before the effects of income taxes of $0.6 million during the year ended December 30, 2017 for the revaluation of the convertible note hedges and the note conversion obligations to fair value. For additional information see Note F, "Debt Obligations " and Note D "Fair Value Measurements." NOTE H—COMMITMENTS AND CONTINGENCIES Lease Commitments The Company leases portions of the air park in Wilmington, Ohio, under lease agreements with a regional port authority, the terms of which expire in May of 2019 and June of 2036 with options to extend the leases. The leased facilities include corporate offices, 310,000 square feet of maintenance hangars and a 100,000 square foot component repair shop at the air park. ABX also has the non-exclusive right to use the airport, which includes one active runway, taxi ways and ramp space. The Company also leases and operates a 311,500 square foot, two hangar aircraft maintenance complex in Tampa, Florida. Additionally, the Company leases certain equipment and airport facilities, office space, and maintenance facilities at locations outside of the airpark in Wilmington. The future minimum lease payments of the Company as of December 31, 2017 are scheduled below (in thousands): 2018 2019 2020 2021 2022 2023 and beyond Total minimum lease payments Facility Leases Other Leases $ 11,109 $ 4,781 2,394 1,969 1,904 12,019 $ 34,176 $ 433 312 179 — — — 924 As of December 31, 2017 and 2016 the Company did not lease in any aircraft. Purchase Commitments The Company has agreements with Israel Aerospace Industries Ltd. ("IAI") for the conversion of Boeing 767 passenger aircraft into a standard configured freighter aircraft. The conversions primarily consist of the installation of a standard cargo door and loading system. At December 31, 2017, the Company was committed to acquire and modify additional Boeing 767-300 passenger aircraft into standard freighter aircraft. In addition to four aircraft that were in the modification process at December 31, 2017, the Company is committed to induct four more aircraft into the freighter modification process through 2018, including commitments to purchase two more Boeing 767-300 passenger aircraft during the first quarter of 2018. As of December 31, 2017, the Company's commitments to complete the conversions of aircraft it owns or has the contracts to purchase totaled $85.3 million. Additionally, the Company could incur a cancellation fee for part kits for any aircraft that is not inducted into conversion at IAI. 65 Guarantees and Indemnifications Certain leases and agreements of the Company contain guarantees and indemnification obligations to the lessor, or one or more other parties that are considered reasonable and customary (e.g. use, tax and environmental indemnifications), the terms of which range in duration and are often limited. Such indemnification obligations may continue after expiration of the respective lease or agreement. Other In addition to the foregoing matters, the Company is also a party to legal proceedings, including FAA enforcement actions, in various federal and state jurisdictions from time to time arising out of the operation of the Company's business. The amount of alleged liability, if any, from these proceedings cannot be determined with certainty; however, the Company believes that its ultimate liability, if any, arising from pending legal proceedings, as well as from asserted legal claims and known potential legal claims which are probable of assertion, taking into account established accruals for estimated liabilities, should not be material to our financial condition or results of operations. Employees Under Collective Bargaining Agreements As of December 31, 2017, the flight crewmember employees of ABX and ATI and flight attendant employees of ATI were represented by the labor unions listed below: Airline ABX ATI ATI Labor Agreement Unit International Brotherhood of Teamsters Air Line Pilots Association Association of Flight Attendants Percentage of the Company’s Employees 8.4% 7.6% 1.3% NOTE I—PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS Defined Benefit and Post-retirement Healthcare Plans ABX sponsors a qualified defined benefit pension plan for ABX crewmembers and a qualified defined benefit pension plan for a major portion of its other ABX employees that meet minimum eligibility requirements. ABX also sponsors non-qualified defined benefit pension plans for certain employees. These non-qualified plans are unfunded. Employees are no longer accruing benefits under any of the defined benefit pension plans. ABX also sponsors a post- retirement healthcare plan for its ABX employees, which is unfunded. Benefits for covered individuals terminate upon reaching age 65 under the post-retirement healthcare plans. The accounting and valuation for these post-retirement obligations are determined by prescribed accounting and actuarial methods that consider a number of assumptions and estimates. The selection of appropriate assumptions and estimates is significant due to the long time period over which benefits will be accrued and paid. The long term nature of these benefit payouts increases the sensitivity of certain estimates of our post-retirement costs. The assumptions considered most sensitive in actuarially valuing ABX’s pension obligations and determining related expense amounts are discount rates and expected long term investment returns on plan assets. Additionally, other assumptions concerning retirement ages, mortality and employee turnover also affect the valuations. Actual results and future changes in these assumptions could result in future costs significantly higher than those recorded in our results of operations. ABX measures plan assets and benefit obligations as of December 31 of each year. Information regarding ABX’s sponsored defined benefit pension plans and post-retirement healthcare plans follow below. The accumulated benefit obligation reflects pension benefit obligations based on the actual earnings and service to-date of current employees. On August 30, 2017, the Company transferred investment assets totaling $106.6 million from the pension plan trust to purchase a group annuity contract from Mutual of America Life Insurance Company ("MUA"). The group annuity contract transfers payment obligations for pension benefits owed to certain former, non-pilot retirees of ABX (or their beneficiaries) to MUA. As a result of the transaction, the Company recognized pre-tax settlement charges of $5.3 66 million to continued operations and $7.6 million to discontinued operations due to the reclassification of $12.9 million of pretax losses from accumulated other comprehensive loss. Effective December 31, 2016, ABX modified its unfunded, non-pilot retiree medical plan to terminate benefits to all participants. Retired participants were directed to public healthcare exchanges for more flexible and lower cost alternatives. As a result, ABX settled $0.6 million of retiree medical obligations. Funded Status (in thousands): Accumulated benefit obligation Change in benefit obligation Obligation as of January 1 Service cost Interest cost Curtailment gain Plan transfers Benefits paid Curtailments and settlement Actuarial (gain) loss Obligation as of December 31 Change in plan assets Fair value as of January 1 Actual gain on plan assets Plan transfers Employer contributions Benefits paid Settlement payments Fair value as of December 31 Funded status Underfunded plans Current liabilities Non-current liabilities Pension Plans 2017 740,783 791,182 — 33,585 8,483 2,643 (33,779) (106,742) 45,411 740,783 $ $ $ $ 715,885 99,090 2,643 4,476 (33,779) (106,742) $ $ 681,573 $ $ $ $ 2016 791,182 777,320 — 35,872 — 1,226 (33,593) — 10,357 791,182 672,153 69,836 1,226 6,263 (33,593) — $ $ 715,885 Post-retirement Healthcare Plans 2017 2016 4,056 4,231 158 142 — — (412) — (63) 4,056 $ $ $ — $ — — 412 (412) — $ — $ 4,231 4,999 123 170 — — (667) (560) 166 4,231 — — — 667 (667) — — (1,497) $ (57,713) $ (1,357) $ (73,940) $ (414) $ (3,642) $ (458) (3,773) $ $ $ $ $ $ $ $ Components of Net Periodic Benefit Cost ABX’s net periodic benefit costs for its defined benefit pension plans and post-retirement healthcare plans for the years ended December 31, 2017, 2016 and 2015, are as follows (in thousands): Service cost Interest cost Expected return on plan assets Curtailments and settlements Amortization of prior service cost Amortization of net (gain) loss Net periodic benefit cost (income) Pension Plans Post-Retirement Healthcare Plan 2017 2016 2015 2017 2016 2015 $ — $ — $ — $ 33,585 35,872 34,584 (42,080) (41,056) (44,082) 12,923 — — — — — 7,778 13,472 7,170 $ 12,206 $ 8,288 $ (2,328) $ 158 142 — — (51) 283 532 $ 123 170 — (1,997) (103) 160 $ (1,647) $ 177 192 — — (542) 292 119 67 Unrecognized Net Periodic Benefit Expense The pre-tax amounts in accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit expense at December 31 are as follows (in thousands): Unrecognized prior service cost Unrecognized net actuarial loss Pension Plans Post-Retirement Healthcare Plans 2017 2016 2017 2016 $ — $ — $ — $ 88,689 112,506 1,547 (51) 1,893 Accumulated other comprehensive loss $ 88,689 $ 112,506 $ 1,547 $ 1,842 The amounts of unrecognized net actuarial loss recorded in accumulated other comprehensive loss that is expected to be recognized as components of net periodic benefit expense during 2018 is $3.5 million and $0.2 million for the pension plans and the post-retirement healthcare plans, respectively. Assumptions Assumptions used in determining the funded status of ABX’s pension plans at December 31 were as follows: Discount rate - crewmembers Discount rate - non-crewmembers Expected return on plan assets 2017 4.00% 4.05% 6.25% Pension Plans 2016 4.50% 4.60% 6.25% 2015 4.70% 4.75% 6.25% Net periodic benefit cost was based on the discount rate assumptions at the end of the previous year. The discount rate used to determine post-retirement healthcare obligations was 3.30% for pilots at December 31, 2017. The discount rate used to determine post-retirement healthcare obligations was 3.55% for pilots at December 31, 2016. The discount rate used to determine post-retirement healthcare obligations was 3.65% for pilots and 3.35% for non-pilots at December 31, 2015. Post-retirement healthcare plan obligations have not been funded. The Company's retiree healthcare contributions have been fixed for each participant, accordingly, healthcare cost trend rates do not effect the post-retirement healthcare obligations. Plan Assets The weighted-average asset allocations by asset category are as shown below: Asset category Cash Equity securities Fixed income securities Real estate Composition of Plan Assets as of December 31 2017 2016 1% 31% 68% —% 100% 1% 30% 64% 5% 100% ABX uses an investment management firm to advise it in developing and executing an investment policy. The portfolio is managed with consideration for diversification, quality and marketability. The investment policy permits the following ranges of asset allocation: equities – 15% to 35%; fixed income securities – 60% to 80%; real estate – 68 0%; cash – 0% to 10%. Except for U.S. Treasuries, no more than 10% of the fixed income portfolio and no more than 5% of the equity portfolio can be invested in securities of any single issuer. The overall expected long term rate of return was developed using various market assumptions in conjunction with the plans’ targeted asset allocation. The assumptions were based on historical market returns. Cash Flows In 2017 and 2016, the Company made contributions to its defined benefit plans of $4.5 million and $6.3 million, respectively. The Company estimates that its contributions in 2018 will be approximately $22.4 million for its defined benefit pension plans and $0.4 million for its post-retirement healthcare plans. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid out of the respective plans as follows (in thousands): 2018 2019 2020 2021 2022 Years 2023 to 2027 Fair Value Measurements Pension Benefits Post-retirement Healthcare Benefits $ $ 31,066 36,615 36,650 39,032 41,113 414 483 502 530 508 225,994 2,177 The pension plan assets are stated at fair value. The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such instruments pursuant to the valuation hierarchy. Common Trust Funds—Common trust funds are composed of shares or units in non-publicly traded funds whereby the underlying assets in these funds (cash, cash equivalents, fixed income securities and equity securities) are publicly traded on exchanges and price quotes for the assets held by these funds are readily available. Holdings of common trust funds are classified as Level 2 investments. Corporate Stock—This investment category consists of common and preferred stock issued by domestic and international corporations that are regularly traded on exchanges and price quotes for these shares are readily available. These investments are classified as Level 1 investments. Mutual Funds—Investments in this category include shares in registered mutual funds, unit trust and commingled funds. These funds consist of domestic equity, international equity and fixed income strategies. Investments in this category that are publicly traded on an exchange and have a share price published at the close of each business day are classified as Level 1 investments and holdings in the other mutual funds are classified as Level 2 investments. Fixed Income Investments—Securities in this category consist of U.S. Government or Agency securities, state and local government securities, corporate fixed income securities or pooled fixed income securities. Securities in this category that are valued utilizing published prices at the close of each business day are classified as Level 1 investments. Those investments valued by bid data prices provided by independent pricing sources are classified as Level 2 investments. 69 The pension plan assets measured at fair value on a recurring basis were as follows (in thousands): As of December 31, 2017 Fair Value Measurement Using Level 1 Level 2 Total Plan assets Common trust funds Corporate stock Mutual funds Fixed income investments Benefit Plan Assets Investments measured at net asset value ("NAV") Total benefit plan assets As of December 31, 2016 Plan assets Common trust funds Corporate stock Mutual funds Fixed income investments Benefit Plan Assets $ $ $ $ — $ 3,792 $ 17,361 53,391 3,926 — 113,426 462,480 74,678 $ 579,698 $ $ 3,792 17,361 166,817 466,406 654,376 27,197 681,573 Fair Value Measurement Using Level 1 Level 2 Total — $ 3,469 $ 20,818 59,370 777 — 114,940 457,238 80,965 $ 575,647 $ 3,469 20,818 174,310 458,015 656,612 59,273 715,885 Investments measured at net asset value ("NAV") Total benefit plan assets $ Investments that were measured at NAV per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. These investments include hedge funds, private equity and real estate funds. Management’s estimates are based on information provided by the fund managers or general partners of those funds. Real Estate—The real estate investment in a commingled trust account consists of publicly traded real estate investment trusts and collateralized mortgage backed securities as well as private market direct property investments. The valuations for the holdings in these investments are not based on readily observable inputs. These assets have been valued using NAV as a practical expedient. Hedge Funds and Private Equity—These investments are not readily tradeable and have valuations that are not based on readily observable data inputs. The fair value of these assets is estimated based on information provided by the fund managers or the general partners. These assets have been valued using NAV as a practical expedient. 70 The following table presents investments measured at fair value based on NAV per share as a practical expedient: Fair Value Redemption Frequency Redemption Notice Period Unfunded Commitments $ $ $ $ 27,197 — 27,197 25,831 33,442 59,273 (1) (2) (3) 90 days 90 days (1) (2) (3) 90 days 90 days $ $ $ $ — — — — — — As of December 31, 2017 Hedge Funds & Private Equity Real Estate Total investments measured at NAV As of December 31, 2016 Hedge Funds & Private Equity Real Estate Total investments measured at NAV (1) Quarterly - hedge funds (2) None - private equity (3) Monthly Defined Contribution Plans The Company sponsors defined contribution capital accumulation plans (401k) that are funded by both voluntary employee salary deferrals and by employer contributions. Expenses for defined contribution retirement plans were $7.8 million, $7.1 million and $5.7 million for the years ended December 31, 2017, 2016 and 2015, respectively. NOTE J—INCOME TAXES The Company's deferred income taxes reflect the value of its net operating loss carryforwards and the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their amounts used for income tax calculations. Federal legislation known as the The Tax Cuts and Jobs Acts ("Tax Act") was enacted on December 22, 2017. The Tax Act reduces the U.S. federal corporate tax rate from the previous rate of 35% to 21% effective January 1, 2018. The Tax Act also makes broad and complex changes to the U.S. tax code, including, but not limited to a one time tax on earnings of certain foreign subsidiaries, limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017, bonus depreciation for full expensing of qualified property, and limitations on the deductibility of certain executive compensation. At December 31, 2017, the Company calculated the effects of the enactment of the Tax Act as written, and made a reasonable estimate of the effects on the existing deferred tax balances. The Company will continue to refine the calculations as additional analysis is completed and the Company gains a more thorough understanding of the Tax Act, including the tax law related to the deductibility of purchased assets, state tax treatment, and amounts related to employee compensation. The re- measurement of deferred tax balances using the lower federal rates enacted by the Tax Act, resulted in a reduction in the Company's net deferred tax liability and the recognition of a deferred tax benefit as depicted by the change in federal statutory tax rate included below. At December 31, 2017, the Company had cumulative net operating loss carryforwards (“NOL CFs”) for federal income tax purposes of approximately $57.6 million, which begin to expire in 2031 if not utilized before then. The deferred tax asset balance includes $1.8 million net of a $0.3 million valuation allowance related to state NOL CFs, which have remaining lives ranging from one to twenty years. These NOL CFs are attributable to excess tax deductions related primarily to the accelerated tax depreciation of fixed assets and cash contributions for its defined benefit pension plans. At December 31, 2017 and 2016, the Company determined that, based upon projections of taxable income, it was more likely than not that the NOL CF’s will be realized prior to their expiration, accordingly, no allowance against these deferred tax assets was recorded. 71 The significant components of the deferred income tax assets and liabilities as of December 31, 2017 and 2016 are as follows (in thousands): Deferred tax assets: December 31 2017 2016 Net operating loss carryforward and federal credits $ 17,021 $ The following summarizes the Company’s income tax provisions (benefits) (in thousands): Years Ended December 31 2017 2016 2015 3,974 8,716 9,229 1,739 3,016 4,317 48,012 (129,201) (5,858) (12,119) (278) (147,456) (99,444) $ (186,015) (8,777) (8,564) (229) (203,585) (122,532) $ 20,596 4,746 27,060 13,785 2,727 7,728 4,411 81,053 524 — 371 21,073 — 1,440 — 22,513 23,408 1,178 $ 820 $ $ 9 48 590 — 151 11,338 — 1,085 — 12,423 13,394 1,384 $ $ 27,625 — 3,396 (59,944) (28,923) (28,276) $ (1,848) $ Warrants Post-retirement employee benefits Employee benefits other than post-retirement Inventory reserve Deferred revenue Other Deferred tax assets Deferred tax liabilities: Accelerated depreciation Partnership items State taxes Valuation allowance against deferred tax assets Deferred tax liabilities Net deferred tax (liability) Current taxes: Federal Foreign State Deferred taxes: Federal Foreign State Change in federal statutory tax rates Total deferred tax expense Total income tax expense (benefit) from continuing operations $ Income tax expense (benefit) from discontinued operations $ 72 The reconciliation of income tax from continuing operations computed at the U.S. statutory federal income tax rates to effective income tax rates is as follows: Statutory federal tax rate Foreign income taxes State income taxes, net of federal tax benefit Tax effect of non-deductible warrant expense Tax effect of stock compensation Tax effect of other non-deductible expenses Change in federal statutory tax rates Other Effective income tax rate Years Ended December 31 2017 2016 2015 35.0 % (0.5)% (39.7)% (485.0)% 21.7 % (19.6)% 917.2 % 3.5 % 432.6 % 35.0 % — % 2.3 % 4.0 % (3.4)% 1.6 % — % (0.6)% 38.9 % 35.0 % — % 1.9 % — % — % 0.9 % — % (0.4)% 37.4 % The income tax deductibility of the warrant expense is less than the expense required by GAAP because for tax purposes, the warrants are valued at a different time and under a different valuation method. The reconciliation of income tax from discontinued operations computed at the U.S. statutory federal income tax rates to effective income tax rates is as follows: Statutory federal tax rate State income taxes, net of federal tax benefit Change in federal statutory tax rates Effective income tax rate Years Ended December 31 2016 2017 2015 35.0% 1.3% —% 36.3% 35.0% 1.3% —% 36.3% 35.0% 1.3% —% 36.3% The Company files income tax returns in the U.S. federal jurisdiction and various international, state and local jurisdictions. The returns may be subject to audit by the Internal Revenue Service (“IRS”) and other jurisdictional authorities. International returns consist primarily of disclosure returns where the Company is covered by the sourcing rules of U.S. international treaties. The Company recognizes the impact of an uncertain income tax position in the financial statements if that position is more likely than not of being sustained on audit, based on the technical merits of the position. At December 31, 2017, 2016 and 2015, the Company's unrecognized tax benefits were $0.0 million, $0.0 million and $0.0 million respectively. Accrued interest and penalties on tax positions are recorded as a component of interest expense. Interest and penalties expense was immaterial for 2017, 2016 and 2015. The Company began to file, effective in 2008, federal tax returns under a common parent of the consolidated group that includes ABX and all the wholly-owned subsidiaries, except for Pemco which was acquired on December 30, 2016. The returns for 2016, 2015 and 2014 related to the consolidated group remain open to examination. The consolidated federal tax returns prior to 2014 remain open to federal examination only to the extent of net operating loss carryforwards carried over from or utilized in those years. Pemco filed returns on its own behalf prior to its acquisition by the Company. State and local returns filed for 2005 through 2016 are generally also open to examination by their respective jurisdictions, either in full or limited to net operating losses. 73 NOTE K—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Accumulated other comprehensive income (loss) includes the following items by components for the years ended December 31, 2017, 2016 and 2015 (in thousands): Balance as of January 1, 2015 Other comprehensive income (loss) before reclassifications: Actuarial gain (loss) for retiree liabilities Foreign currency translation adjustment Amounts reclassified from accumulated other comprehensive income: Actuarial costs (reclassified to salaries, wages and benefits) Negative prior service cost (reclassified to salaries, wages and benefits) Hedging gain (reclassified to interest expense) Income Tax (Expense) or Benefit Other comprehensive income (loss), net of tax Balance as of December 31, 2015 Other comprehensive income (loss) before reclassifications: Actuarial gain (loss) for retiree liabilities Foreign currency translation adjustment Amounts reclassified from accumulated other comprehensive income: Plan curtailment and settlement Actuarial costs (reclassified to salaries, wages and benefits) Negative prior service cost (reclassified to salaries, wages and benefits) Income Tax (Expense) or Benefit Other comprehensive income (loss), net of tax Balance as of December 31, 2016 Other comprehensive income (loss) before reclassifications: Actuarial gain (loss) for retiree liabilities Foreign currency translation adjustment Amounts reclassified from accumulated other comprehensive income: Plan settlement Actuarial costs (reclassified to salaries, wages and benefits) Negative prior service cost (reclassified to salaries, wages and benefits) Income Tax (Expense) or Benefit Other comprehensive income (loss), net of tax Balance as of December 31, 2017 Defined Benefit Pension (81,191) Defined Benefit Post- Retirement (630) Gains and Losses on Derivative 4 Foreign Currency Translation (1,059) Total (82,876) (32,640) — 7,170 — — 9,359 (16,111) (97,302) 18,424 — 745 — 292 (542) — (180) 315 (315) 394 — — (1,997) 160 (103) 560 (986) (1,301) 63 — — 283 (51) (91) 204 (1,097) 13,472 — (11,682) 20,214 (77,088) 3,116 — 12,923 7,778 — (7,304) 16,513 (60,575) 74 — — — — (50) 46 (4) — — — — — — — — — — — — — — — — — — (517) (31,895) (517) — — — 181 (336) (1,395) 7,462 (542) (50) 9,406 (16,136) (99,012) — (126) 18,818 (126) — — — 44 (82) (1,477) — 195 — — — (66) 129 (1,348) (1,997) 13,632 (103) (11,078) 19,146 (79,866) 3,179 195 12,923 8,061 (51) (7,461) 16,846 (63,020) NOTE L—STOCK-BASED COMPENSATION The Company's Board of Directors has granted stock incentive awards to certain employees and board members pursuant to a long term incentive plan which was approved by the Company's stockholders in May 2005 and in May 2015. Employees have been awarded non-vested stock units with performance conditions, non-vested stock units with market conditions and non-vested restricted stock. The restrictions on the non-vested restricted stock awards lapse at the end of a specified service period, which is typically three years from the date of grant. Restrictions could lapse sooner upon a business combination, death, disability or after an employee qualifies for retirement. The non-vested stock units will be converted into a number of shares of Company stock depending on performance and market conditions at the end of a specified service period, lasting approximately three years. The performance condition awards will be converted into a number of shares of Company stock based on the Company's average return on invested capital during the service period. Similarly, the market condition awards will be converted into a number of shares depending on the appreciation of the Company's stock compared to the NASDAQ Transportation Index. Board members were granted time-based awards with vesting periods of approximately six or twelve months. The Company expects to settle all of the stock unit awards by issuing new shares of stock. The table below summarizes award activity. Year Ended December 31 2017 2016 2015 Outstanding at beginning of period Granted Converted Expired Forfeited Outstanding at end of period Vested Weighted average grant-date fair value 9.97 $ 17.52 9.47 9.22 13.55 12.30 7.61 Number of Awards 1,040,569 243,940 (320,810) (82,050) (7,800) 873,849 441,424 $ $ Weighted average grant-date fair value 7.52 $ 15.47 7.32 7.44 10.23 9.97 6.60 $ $ Number of Awards 1,157,659 314,060 (329,200) (92,750) (9,200) 1,040,569 472,294 Weighted average grant-date fair value 6.21 $ 9.61 5.97 5.52 7.36 7.52 6.03 $ $ Number of Awards 1,406,550 390,200 (498,491) (126,800) (13,800) 1,157,659 511,109 The average grant-date fair value of each performance condition award, non-vested restricted stock award and time- based award granted by the Company was $16.72, $14.39 and $9.22 for 2017, 2016 and 2015, respectively, the fair value of the Company’s stock on the date of grant. The average grant-date fair value of each market condition award granted was $20.18, $19.65 and $10.99 for 2017, 2016 and 2015, respectively. The market condition awards were valued using a Monte Carlo simulation technique based on volatility over three years for the awards granted in 2017, 2016 and 2015 using daily stock prices and using the following variables: Risk-free interest rate Volatility 2017 1.7% 34.7% 2016 1.1% 36.9% 2015 0.9% 41.5% For the years ended December 31, 2017, 2016 and 2015, the Company recorded expense of $3.6 million, $3.2 million and $2.5 million, respectively, for stock incentive awards. At December 31, 2017, there was $3.8 million of unrecognized expense related to the stock incentive awards that is expected to be recognized over a weighted-average period of 1.5 years. As of December 31, 2017, none of the awards were convertible, 324,599 units of the Board members time-based awards had vested and none of the outstanding shares of the restricted stock had vested. These awards could result in a maximum number of 1,084,524 additional outstanding shares of the Company’s common stock depending on service, performance and market results through December 31, 2019. 75 NOTE M—COMMON STOCK AND EARNINGS PER SHARE Earnings per Share The calculation of basic and diluted earnings per common share are as follows (in thousands, except per share amounts): Numerator: Earnings from continuing operations Denominator: December 31 2017 2016 2015 $ 21,740 $ 21,060 $ 39,155 Weighted-average shares outstanding for basic earnings per share 58,907 61,330 64,242 Common equivalent shares: Effect of stock-based compensation awards and warrants Weighted-average shares outstanding assuming dilution Basic earnings per share from continuing operations Diluted earnings per share from continuing operations 779 59,686 0.37 0.36 $ $ 1,664 62,994 0.34 0.33 $ $ 885 65,127 0.61 0.60 $ $ Basic weighted average shares outstanding for purposes of basic earnings per share are less than the shares outstanding due to 241,000 shares, 327,700 shares and 348,600 shares of restricted stock for 2017, 2016 and 2015, respectively, which are accounted for as part of diluted weighted average shares outstanding in diluted earnings per share. The determination of diluted earnings per share requires the exclusion of the fair value re-measurement of the stock warrants recorded as a liability (see Note B), if such warrants have a anti-dilutive effect on earnings per share. The dilutive effect of the weighted-average diluted shares outstanding is calculated using the treasury method for periods in which equivalent shares have a dilutive effect on earnings per share. Under this method, the number of diluted shares is determined by dividing the assumed proceeds of the warrants recorded as a liability by the average stock price during the period and comparing that amount with the number of corresponding warrants outstanding. The underlying warrants recorded as a liability as of December 31, 2017 and 2016 would have resulted in 14.8 million and 11.1 million additional shares of the Company's common stock, respectively, if the warrants were settled by tendering cash. The warrants recorded in stockholders' equity as of December 31, 2017, would have resulted in 8.1 million additional shares of the Company's common stock, if the Company's stock price exceeded $41.35 and the warrants were settled in shares. Purchase of Common Stock The Company's Board of Directors has authorized management to repurchase outstanding common stock of the Company from time to time on the open market or in privately negotiated transactions. The authorization does not require the Company to repurchase a specific number of shares and the Company may terminate the repurchase program at any time. Upon the retirement of common stock repurchased, the excess purchase price over the par value for retired shares of common stock is recorded to additional paid-in-capital. The Company repurchased common stock during 2017, including 380,637 shares on June 6, 2017 from an underwriter in conjunction with an underwritten secondary offering by its largest shareholder, Red Mountain Partners, L.P., a fund that is affiliated with Red Mountain Capital Partners, LLC (“Red Mountain”), a related party, for an aggregate purchase price of $8.5 million. The share price of $22.42 was equal to the price per share paid by the underwriter to Red Mountain. 76 NOTE N—SEGMENT INFORMATION The Company operates in three reportable segments. The CAM segment consists of the Company's aircraft leasing operations and its segment earnings include an allocation of interest expense. The ACMI Services segment consists of the Company's airline operations, including CMI agreements as well as ACMI and charter service agreements that the Company has with its customers. Due to the similarities among the Company's airline operations, the airline operations are aggregated into a single reportable segment, ACMI Services. The Ground Services segment provides mail and package sorting services, as well as related maintenance services for ground equipment, facilities and material handling equipment. The Ground Services segment became a reportable during 2017 due revenue growth exceeding 10% of the Company total revenues. Prior periods presented below have been prepared by removing Ground Services from "All other" for comparative purposes. The Company's other activities, which include the sale of aircraft parts, aircraft maintenance services, aircraft modifications, the sales of aviation fuel and other services, are not large enough to constitute reportable segments and are combined in All other with inter-segment profit eliminations. Inter-segment revenues are valued at arms-length market rates. Cash and cash equivalents are reflected in Assets - All other below. The Company's segment information from continuing operations is presented below (in thousands): Total revenues: CAM ACMI Services Ground Services All other Eliminate inter-segment revenues Total Customer revenues: CAM ACMI Services Ground Services All other Total Depreciation and amortization expense: CAM ACMI Services Ground Services All other Total Segment earnings (loss): CAM ACMI Services Ground Services All other Net unallocated interest expense Net gain (loss) on financial instruments Loss from non-consolidated affiliate Pre-tax earnings from continuing operations Year Ended December 31 2016 2015 2017 $ 209,560 $ 195,092 $ 614,741 206,631 227,205 492,859 116,796 145,743 177,789 433,109 60,163 101,832 $ $ $ $ $ $ (189,937) (181,620) (153,629) 1,068,200 $ 768,870 $ 619,264 140,434 $ 117,642 $ 614,721 204,150 108,895 492,859 114,813 43,556 93,395 431,989 58,160 35,720 1,068,200 $ 768,870 $ 619,264 108,106 $ 92,396 $ 41,929 1,985 2,536 41,487 973 640 87,765 37,526 260 (108) 154,556 $ 135,496 $ 125,443 61,510 $ 68,608 $ 2,476 9,369 4,355 (1,322) (79,789) (3,135) (32,125) 10,603 6,020 (545) (18,107) — 57,457 (2,654) 5,395 3,166 (1,721) 920 — $ (6,536) $ 34,454 $ 62,563 77 The Company's assets are presented below by segment (in thousands): Assets: CAM ACMI Services Ground Services All other Total December 31 2017 2016 2015 $ 1,192,890 $ 971,986 $ 189,379 44,480 122,095 164,489 33,411 89,444 804,776 154,852 15,777 66,316 $ 1,548,844 $ 1,259,330 $ 1,041,721 Interest expense allocated to CAM was $15.6 million, $10.6 million and $9.4 million for the years ending December 31, 2017, 2016 and 2015, respectively. During 2017, the Company had capital expenditures of $28.7 million, $283.8 million and $2.9 million for the ACMI Services, CAM and Ground Services segments, respectively. Entity-Wide Disclosures The Company had revenues of approximately $170.1 million, $168.2 million and $206.5 million for 2017, 2016 and 2015, respectively, derived primarily from aircraft leases in foreign countries, routes with flights departing from or arriving in foreign countries or aircraft maintenance and modification services performed in foreign countries. All revenues from the CMI agreement with DHL and the ATSA agreement with AFI are attributed to U.S. operations. As of December 31, 2017 and 2016, the Company had 16 and 12 aircraft, respectively, deployed outside of the United States. CAM's revenues included $19.5 million, $17.4 million and $12.6 million for 2017, 2016 and 2015, respectively, for engine and other maintenance related payments from customers. The Company's external customer revenues from its aircraft maintenance, modifications, conversions and part sales within other activities for the years ended December 31, 2017, 2016 and 2015 were $106.8 million, $40.8 million, and $33.7 million, respectively. NOTE O—DISCONTINUED OPERATIONS The Company's results of discontinued operations consist primarily of pension benefits, adjustments to workers compensation liabilities and other benefits for former employees previously associated with ABX's former freight sorting and aircraft fueling services provided to DHL. The Company may incur expenses and cash outlays in the future related to pension obligations, self -insurance reserves for medical expenses and wage loss for former employees. Carrying amounts of significant assets and liabilities of the discontinued operations are below (in thousands): Liabilities Employee compensation and benefits Post-retirement Total Liabilities December 31 2017 2016 $ $ 17,880 4,652 22,532 $ $ 19,885 5,663 25,548 During 2017, pre-tax losses from discontinued operations were $5.1 million. Pre-tax earnings from discontinued operations were $3.8 million and $3.2 million during 2016 and 2015, respectively. 78 NOTE P—QUARTERLY RESULTS (Unaudited) The following is a summary of quarterly results of operations (in thousands, except per share amounts): 2017 (1) Revenues from continuing operations Operating income from continuing operations Net earnings (loss) from continuing operations (2) Net earnings from discontinued operations Weighted average shares: Basic Diluted Earnings per share from continuing operations Basic Diluted 2016 (3) Revenues from continuing operations Operating income from continuing operations Net earnings from continuing operations Net earnings from discontinued operations Weighted average shares: Basic Diluted Earnings per share from continuing operations Basic Diluted 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter $ 237,917 $ 253,211 $ 254,101 $ 322,971 17,753 9,796 192 59,133 64,949 0.17 0.13 177,385 15,351 8,171 47 63,636 65,057 $ $ $ 22,948 (53,918) 192 18,923 (28,229) (4,655) 59,035 59,035 58,733 58,733 33,671 94,091 1,026 58,733 68,987 (0.91) $ (0.91) $ (0.48) $ (0.48) $ 1.60 1.11 176,549 $ 193,261 $ 221,675 15,801 11,528 47 63,267 66,763 14,456 2,116 47 59,379 60,283 18,140 (755) 2,287 59,083 59,083 0.13 0.13 $ $ 0.18 0.12 $ $ 0.04 0.04 $ $ (0.01) (0.01) $ $ $ $ $ 1. During 2017, the Company recorded a $1.9 million gain, a $67.6 million loss, a $34.4 million loss and a $20.4 million gain on the remeasurement of financial instruments, primarily related to the warrants issued to Amazon for the quarters ended March 31, 2017, June 30, 2017, September 30, 2017 and December 31, 2017, respectively. 2. During 2017, the Company recorded a $59.9 million deferred tax gain during the quarter ended December 31, 2017 due to the enactment of lower U.S. federal corporate tax rates. 3. During 2016, the Company recorded a 0.5 million loss, a 5.6 million gain, a 8.5 million loss and a 14.7 million loss on the remeasurement of financial instruments, primarily related to the warrants issued to Amazon for the quarters ended March 31, 2016, June 30, 2016, September 30, 2016 and December 31, 2016, respectively. 79 ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE None. ITEM 9A. CONTROLS AND PROCEDURES (a) Evaluation of Disclosure Controls and Procedures As of December 31, 2017, the Company carried out an evaluation, under the supervision and with the participation of the Company's Chief Executive Officer and Chief Financial Officer of the effectiveness of the design and operation of the Company's disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")). Based upon the evaluation, the Company's Chief Executive Officer and Chief Financial Officer 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 filed or submitted by it under the Exchange Act is recorded, processed, summarized and reported within time periods specified in the Securities and Exchange Commission rules and forms and is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. (b) Changes in Internal Controls There were no changes in internal control over financial reporting during the most recently completed fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting. Management’s Annual Report on Internal Controls over Financial Reporting The management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting. The Company’s internal control system is 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. All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. The Company’s management 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 management’s assessment of those criteria, management believes that, as of December 31, 2017, the Company’s internal control over financial reporting was effective. March 1, 2018 80 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the stockholders and the Board of Directors of Air Transport Services Group, Inc. Opinion on Internal Control over Financial Reporting We have audited the internal control over financial reporting of Air Transport Services Group, Inc. and subsidiaries (the “Company”) as of December 31, 2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO. We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements and financial statement schedule as of and for the year ended December 31, 2017, of the Company and our report dated March 1, 2018, expressed an unqualified opinion on those financial statements and financial statement schedule and includes an explanatory paragraph regarding the Company’s three principal customers. 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. 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/ DELOITTE & TOUCHE LLP Cincinnati, Ohio March 1, 2018 81 ITEM 9B. OTHER INFORMATION None. PART III ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2018 Annual Meeting of Stockholders under the captions “Election of Directors,” “Section 16(a) Beneficial Ownership Reporting Compliance,” and “Corporate Governance and Board Matters.” Executive Officers The following table sets forth information about the Company’s executive officers. The executive officers serve at the pleasure of the Company’s Board of Directors. Name Joseph C. Hete Age 63 Quint O. Turner 55 Richard F. Corrado 58 W. Joseph Payne 54 Information President and Chief Executive Officer, Air Transport Services Group, Inc., since December 2007 and Chief Executive Officer, ABX Air, Inc., since August 2003. Mr. Hete was President of ABX Air, Inc. from January 2000 to February 2008. Mr. Hete was Chief Operating Officer of ABX Air, Inc. from January 2000 to August 2003. From 1997 until January 2000, Mr. Hete held the position of Senior Vice President and Chief Operating Officer of ABX Air, Inc. Mr. Hete served as Senior Vice President, Administration of ABX Air, Inc. from 1991 to 1997 and Vice President, Administration of ABX Air, Inc. from 1986 to 1991. Mr. Hete joined ABX Air, Inc. in 1980. Chief Financial Officer, Air Transport Services Group, Inc., since February 2008 and Chief Financial Officer, ABX Air, Inc. since December 2004. Mr. Turner was Vice President of Administration of ABX Air, Inc. from February 2002 to December 2004. Mr. Turner was Corporate Director of Financial Planning and Accounting of ABX Air, Inc. from 1997 to 2002. Prior to 1997, Mr. Turner held positions of Manager of Planning and Director of Financial Planning of ABX Air, Inc. Mr. Turner joined ABX Air, Inc. in 1988. Chief Operating Officer, Air Transport Services Group, Inc., since September 2017. President of Cargo Aircraft Management Inc., since April 2010. President of Airborne Global Solutions, Inc. since July 2010. Mr. Corrado was Chief Commercial Officer, Air Transport Services Group, Inc., from April 2010 to September 2017 Before joining ATSG, Mr. Corrado was President of Transform Consulting Group from July 2006 through March 2010 and Chief Operating Officer of AFMS Logistics Management from February 2008 through March 2010. He was Executive Vice President of Air Services and Business Development for DHL Express from September 2003 through June of 2006; and Senior Vice President of Marketing for Airborne Express from August 2000 through August 2003. Chief Legal Officer & Secretary, Air Transport Services Group, Inc., since May 2016; Senior Vice President, Corporate General Counsel and Secretary, Air Transport Services Group, Inc., since February 2008; and Vice President, General Counsel and Secretary, ABX Air, Inc. since January 2004. Mr. Payne was Corporate Secretary/Counsel of ABX Air, Inc. from January 1999 to January 2004, and Assistant Corporate Secretary from July 1996 to January 1999. Mr. Payne joined ABX Air, Inc. in April 1995. 82 The executive officers of the Company are appointed annually at the Board of Directors meeting held in conjunction with the annual meeting of stockholders. There are no family relationships between any directors or executive officers of the Company. ITEM 11. EXECUTIVE COMPENSATION The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2018 Annual Meeting of Stockholders under the captions “Executive Compensation” and “Director Compensation.” ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS The responses to this Item are incorporated herein by reference to the definitive Proxy Statement for the 2018 Annual Meeting of Stockholders under the captions “Equity Compensation Plan Information,” “Voting at the Meeting,” “Stock Ownership of Management” and “Common Stock Ownership of Certain Beneficial Owners.” ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2018 Annual Meeting of Stockholders under the captions “Related Person Transactions” and “Independence.” ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES The response to this Item is incorporated herein by reference to the definitive Proxy Statement for the 2018 Annual Meeting of Stockholders under the caption “Fees of the Independent Registered Public Accounting Firm.” PART IV ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES (a) List of Documents filed as part of this report: (1) Consolidated Financial Statements The following are filed in Part II, item 8 of this Form 10-K Annual Report: Report of Independent Registered Public Accounting Firm Consolidated Balance Sheets Consolidated Statements of Operations Consolidated Statements of Comprehensive Income Consolidated Statements of Cash Flows Consolidated Statements of Stockholders’ Equity Notes to Consolidated Financial Statements (2) Financial Statement Schedules 83 Description Accounts receivable reserve: Year ended: December 31, 2017 December 31, 2016 December 31, 2015 Schedule II—Valuation and Qualifying Account Balance at beginning of period Additions charged to cost and expenses Deductions Balance at end of period $ $ 1,264,211 415,336 811,875 $ 1,184,099 1,006,307 138,310 $ 3,000 157,432 534,849 2,445,310 1,264,211 415,336 All other schedules are omitted because they are not applicable or are not required, or because the required information is included in the consolidated financial statements or notes thereto. (3) Exhibits The following exhibits are filed with or incorporated by reference into this report. Exhibit No. Description of Exhibit Articles of Incorporation 3.1 3.2 4.1 4.2 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 Amended and Restated Certificate of Incorporation of Air Transport Services Group, Inc. reflecting corrections and amendments through August 16, 2013. [This document represents the Amended and Restated Certificate of Incorporation of Air Transport Services Group, Inc. in compiled form, incorporating all corrections and amendments. This compiled document has not been filed with the Delaware Secretary of State.] (26) Amended and Restated Bylaws of Air Transport Services Group, Inc., reflecting amendments through May 10, 2013. (16) Instruments defining the rights of security holders Indenture, dated September 29, 2017, by and between Air Transport Services Group, Inc. and U.S. Bank National Association. (29) Form of 1.125% Convertible Senior Note due 2024 (included in Exhibit 4.1). (29) Material Contracts Director compensation fee summary. (8) Aircraft Loan and Security Agreement and related promissory note, dated August 24, 2006, by and among ABX Air, Inc. and Chase Equipment Leasing, Inc. (2) Aircraft Loan and Security Agreement and related promissory note, dated October 10, 2006, by and among ABX Air, Inc. and Chase Equipment Leasing, Inc. (3) Aircraft Loan and Security Agreement and related promissory note, dated February 16, 2007, by and among ABX Air, Inc. and Chase Equipment Leasing, Inc. (4) Aircraft Loan and Security Agreement and related promissory note, dated April 25, 2007, by and among ABX Air, Inc. and Chase Equipment Leasing, Inc. (5) Aircraft Loan and Security Agreement and related promissory note, dated October 26, 2007, by and among ABX Air, Inc. and Chase Equipment Leasing, Inc. (7) Aircraft Loan and Security Agreement and related promissory note, dated December 19, 2007, by and among ABX Air, Inc. and Chase Equipment Leasing, Inc. (7) Guaranty by Air Transport Services Group, Inc. in favor of DHL Express (USA), Inc., dated May 8, 2009 (6), as amended by Amendment to the Guaranty dated as of January 14, 2015 (20) 84 10.9 10.10 10.11 10.12 10.13 10.14 10.15 10.16 10.17 10.18 10.19 10.20 10.21 10.22 10.23 10.24 10.25 Form of Time-Based Restricted Stock Award Agreement under Air Transport Services Group, Inc. 2005 Amended and Restated Long-Term Incentive Plan. (9) Form of Performance-Based Stock Unit Award Agreement under Air Transport Services Group, Inc. 2005 Amended and Restated Long-Term Incentive Plan. (9) Form of Restricted Stock Unit Award Agreement under Air Transport Services Group, Inc. 2005 Amended and Restated Long-Term Incentive Plan. (18) Conversion Agreement dated August 3, 2010, between Cargo Aircraft Management, Inc., M&B Conversions Limited and Israel Aerospace Industries Ltd. (10) Credit Agreement, dated as of May 9, 2011, among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., the Lenders from time to time party thereto, SunTrust Bank, as Administrative Agent, Regions Bank and JPMorgan Chase Bank, N.A., as Syndication Agents, and Bank of America, N.A., as Documentation Agent. (11) Guarantee and Collateral Agreement, dated as of May 9, 2011, made by Cargo Aircraft Management, Inc. and certain of its Affiliates in favor of SunTrust Bank, as Administrative Agent. (11) Amendment to Confidentiality and Standstill Agreement, dated as of June 11, 2012, between Air Transport Services Group, Inc. and Red Mountain Capital Partners LLC. (12) Form of amended and restated change-in-control agreement in effect between Air Transport Services Group, Inc. and its executive officers. (14) Amendment to the Credit Agreement, dated July 20, 2012, among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., the Lenders from time to time party thereto, SunTrust Bank, as Administrative Agent, Regions Bank and JPMorgan Chase Bank, N.A., as Syndication Agents, and Bank of America, N.A., as Documentation Agent. (13) Amended and Restated Lease Agreement, dated December 27, 2012, between Clinton County Port Authority and Air Transport Services Group, Inc. (15) Loan Agreement, Chapter 166, Ohio Revised Code, dated December 1, 2012, between the Director of Development Services Agency of Ohio and Clinton County Port Authority. (15) Guaranty Agreement, dated December 1, 2012, among Air Transport Services Group, Inc., Airborne Maintenance and Engineering Services, Inc., Air Transport International, LLC, Clinton County Port Authority, the Directory of Development Services Agency of Ohio, and the Huntington National Bank. (15) Lease Agreement for the Jump Hangar Facility, dated December 1, 2012, between Clinton County Port Authority and Air Transport International, LLC. (15) Leasehold Mortgage, Assignment of Leases and Rents, Security Agreement and Financing Statement, dated December 1, 2012, among Air Transport International, LLC and the Director of Development Services Agency of Ohio. (15) Bond Purchase Agreement, dated December 13, 2012, among the State of Ohio, acting by and through its Treasurer of State, the Development Services Agency of Ohio, acting by and through a duly authorized representative, Clinton County Port Authority, Air Transport International, LLC and Stifel, Niolaus & Company, Inc. (15) Air Transport Services Group, Inc. Nonqualified Deferred Compensation Plan, dated October 31, 2013. (17) Second Amendment to the Credit Agreement, dated October 22, 2013, among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., the Lenders from time to time party thereto, SunTrust Bank, as Administrative Agent, Regions Bank and JPMorgan Chase Bank, N.A., as Syndication Agents, and Bank of America, N.A., as Documentation Agents. (17) 85 10.26 10.27 10.28 10.29 10.30 10.31 10.32 10.33 10.34 10.35 10.36 10.37 10.38 10.39 10.40 Third Amendment to Credit Agreement and First Amendment to Guarantee and Collateral Agreement, dated May 6, 2014, by and among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., each of the Guarantors party thereto, each of the financial institutions party thereto as "Lenders", and SunTrust Bank as Administrative Agent. (19) Amended and Restated Air Transportation Services Agreement between DHL Network Operations (USA), Inc., ABX Air, Inc. and Cargo Aircraft Management, Inc., dated January 14, 2015. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. (20) Fifth Amendment to Credit Agreement, dated May 8, 2015, by and among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., each of the Guarantors party thereto, each of the financial institutions party thereto as "Lenders" and SunTrust Bank, in its capacity as Administrative Agent. (21) Air Transportation Services Agreement, dated as of March 8, 2016, by and between Airborne Global Solutions, Inc. and Amazon Fulfillment Services Inc. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. (22) Investment Agreement, dated as of March 8, 2016, by and between Air Transport Services Group, Inc., and Amazon.com, Inc. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. (22) Warrant to Purchase Common Stock, issued March 8, 2016, by and between Air Transport Services Group, Inc. and Amazon.com. Those portions of the Warrant marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. (22) Stockholders Agreement, dated as of March 8, 2016, by and between Air Transport Services Group, Inc., and Amazon.com, Inc. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. (22) Amended and Restated Credit Agreement, dated as of May 31, 2016, among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., the Lenders from time to time party hereto, SunTrust Bank, as Administrative Agent, Regions Bank and JPMorgan Chase Bank, N.A., as Syndication Agents and Bank of America, N.A., as Documentation Agent. (23) Guarantee and Collateral Agreement made by Cargo Aircraft Management, Inc. and certain of its Affiliates in favor of SunTrust Bank, as Administrative Agent, dated as of May 31, 2016. (23) Air Transport Services Group, Inc. Executive Incentive Compensation Plan, last modified August 5, 2016. (23) Form of Time-Based Restricted Stock Award Agreement under Air Transport Services Group, Inc. 2015 Amended and Restated Long-Term Incentive Plan. (24) Form of Performance-Based Stock Unit Award Agreement under Air Transport Services Group, Inc. 2015 Amended and Restated Long-Term Incentive Plan. (24) Form of Restricted Stock Unit Award Agreement under Air Transport Services Group, Inc. 2015 Amended and Restated Long-Term Incentive Plan. (24) Stock Purchase Agreement, dated June 21, 2016, between Air Transport Services Group, Inc. and Red Mountain Partners, L.P. (25) First Amendment to the Amended and Restated Credit Agreement, dated as of March 31, 2017, among Cargo Aircraft Management, Inc., as Borrower, Air Transport Services Group, Inc., the Lenders from time to time party hereto, SunTrust Bank, as Administrative Agent, Regions Bank and JPMorgan Chase Bank, N.A., as Syndication Agents and Bank of America, N.A., as Documentation Agent. (27) 86 10.41 10.42 10.43 10.44 10.45 10.46 10.47 10.48 10.49 10.50 10.51 10.52 10.53 10.54 10.55 10.56 10.57 10.58 10.59 10.60 10.61 Underwriting Agreement, dated May 31, 2017, by and among Air Transport Services Group, Inc., Red Mountain Partners, L.P. and Merrill Lynch, Pierce, Fenner & Smith Incorporated. (28) Second Amendment to the Amended and Restated Credit Agreement, entered into on September 25, 2017, by and among Air Transport Services Group, Inc., Cargo Aircraft Management, Inc., as borrower, the guarantors party thereto, the lenders party thereto and SunTrust Bank, as Administrative Agent. (30) Purchase Agreement, dated September 25, 2017, by and among Air Transport Services Group, Inc. and Goldman Sachs & Co. LLC and SunTrust Robinson Humphrey, Inc., as representatives of the initial purchasers named therein. (29) Base Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Goldman Sachs & Co. LLC. (29) Base Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of America, N.A. (29) Base Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and JPMorgan Chase Bank, National Association, London Branch. (29) Base Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of Montreal. (29) Additional Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Goldman Sachs & Co. LLC. (29) Additional Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of America, N.A. (29) Additional Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and JPMorgan Chase Bank, National Association, London Branch. (29) Additional Convertible Bond Hedge Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of Montreal. (29) Bank Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Goldman Sachs & Co. LLC. (29) Bank Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of America, N.A. (29) Bank Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and JPMorgan Chase Bank, National Association, London Branch. (29) Bank Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of Montreal. (29) Additional Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Goldman Sachs & Co. LLC. (29) Additional Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of America, N.A. (29) Additional Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and JPMorgan Chase Bank, National Association, London Branch. (29) Additional Warrant Confirmation, dated September 25, 2017, between Air Transport Services Group, Inc., and Bank of Montreal. (29) Air Transport Services Group, Inc. Severance Plan for Senior Management. (31) Confirmation Agreement, dated August 23, 2017, between Mutual of America Life Insurance Company and ABX Air, Inc., relating to the ABX Air Retirement Income Plan. (31) 87 14.1 21.1 23.1 31.1 31.2 32.1 32.2 Code of Ethics Code of Ethics—CEO and CFO. (1) List of Significant Subsidiaries List of Significant Subsidiaries of Air Transport Services Group, Inc., filed within. Consent of experts and counsel Consent of independent registered public accounting firm, filed herewith. Certifications Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith. Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith. Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith. Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith. 101.INS 101.SCH 101.CAL 101.DEF 101.LAB 101.PRE XBRL Instance Document XBRL Taxonomy Extension Schema Document XBRL Taxonomy Extension Calculation Linkbase Document XBRL Taxonomy Extension Definition Linkbase Document XBRL Taxonomy Extension Labels Linkbase Document XBRL Taxonomy Extension Presentation Linkbase Document ____________________ (1) (2) The Company's Code of Ethics can be accessed from the Company's Internet website at www.atsginc.com. Incorporated by reference to the Company’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on November 9, 2006. Incorporated by reference to the Company’s Annual Report on Form 10-K/A filed on August 14, 2007 with the Securities and Exchange Commission. Incorporated by reference to the Company’s Quarterly Report on Form 10-Q/A, filed with the Securities and Exchange Commission on August 14, 2007. Incorporated by reference to the Company’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on August 14, 2007. Incorporated by reference to the Company’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on August 10, 2009. Incorporated by reference to the Company’s Annual Report on Form 10-K filed on March 17, 2008 with the Securities and Exchange Commission. Incorporated by reference to the Company's Proxy Statement for the 2017 Annual Meeting of Stockholders, Corporate Governance and Board Matters, filed March 23, 2017 with the Securities and Exchange Commission. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 10, 2010. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 3, 2010. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 3, 2011. Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on June 18, 2012. (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) 88 (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) (28) (29) (30) (31) Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on July 24, 2012. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 2, 2012. Incorporated by reference to the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 4, 2013. Those portions of the Agreement marked with an [*] have been omitted pursuant to a request for confidential treatment and have been filed separately with the SEC. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2013. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 6, 2013. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 12, 2014. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 5, 2014. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 8, 2015, as amended by the Company's Quarterly Report on Form 10-Q/A filed with the Securities and Exchange Commission on August 7, 2015. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 7, 2015. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 10, 2016. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2016. Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on March 15, 2016. Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on June 27, 2016. Incorporated by reference to the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 8, 2017. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 8, 2017. Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on June 2, 2017. Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on September 29, 2017. Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on September 25, 2017. Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 9, 2017. 89 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 Air Transport Services Group, Inc. Signature /S/ JOSEPH C. HETE Joseph C. Hete Title President and Chief Executive Officer (Principal Executive Officer) Date March 1, 2018 Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons in the capacities and on the date indicated: Signature /S/ RANDY D. RADEMACHER Randy D. Rademacher Director and Chairman of the Board March 1, 2018 Title Date /S/ RICHARD M. BAUDOUIN Richard M. Baudouin Director /S/ JOSEPH C. HETE Joseph C. Hete /S/ RAYMOND E. JOHNS JR. Raymond E. Johns, Jr. /S/ J. CHRISTOPHER TEETS J. Christopher Teets /S/ JEFFREY J. VORHOLT Jeffrey J. Vorholt /S/ QUINT O. TURNER Quint O. Turner Director, President and Chief Executive Officer (Principal Executive Officer) Director Director Director March 1, 2018 March 1, 2018 March 1, 2018 March 1, 2018 March 1, 2018 Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) March 1, 2018 90 [This page intentionally left blank] [This page intentionally left blank] Air Transport Services Group 2017 Annual Report Air Transport Services Group 2017 Annual Report To Our Shareholders Investor Information Your company ended 2017 with substantial the warrants, was $95.7 million in 2017. The other increases in revenues and earnings on the strength principal item affecting our GAAP results was a of very good performances by all of our businesses. $59.9 million tax benefit from the tax-law changes On a consolidated basis, fourth-quarter enacted in December. revenues increased by more than $100 million to $323 million, and by nearly $300 million 2017’s solid performance was aided by across-the-board growth in each of our businesses for the year to $1.1 billion. Those are record totals and a solid peak season of airline service for our for us since our business model changed in 2010. customers. In August, we completed our We earned $21.7 million, or 36 cents per share commitment to supply Amazon with twenty diluted in 2017, up from $21.1 million, or 33 cents leased 767s to serve as the backbone of its new per share diluted in 2016, as recorded under Generally Accepted Accounting Principles. air network, plus the flight crews, maintenance, and logistics to support them. As a result, Amazon Two non-cash items, however, had a major effect became our largest customer in 2017, accounting on those GAAP results. The largest was a net loss for 44 percent of our total revenues. DHL revenues for the year from revaluation of warrants we have were 24 percent, and the U.S. Military 7 percent issued to Amazon incrementally under commercial of our total revenues. agreements we signed with them in 2016. These The principal factor for the airlines was expanded revaluations occur quarterly, and reflect changes in flying during a busy peak, which included operations the size of our warrant liability from share-price for our principal customers, DHL and Amazon, changes and additional vested warrants. Unrealized as well as some peak season flying for other losses tied to increases in that liability are in part good news for shareholders, as losses are driven mainly by increases in our stock price. customers. Taken together, our block hours exceeded the prior year by 22 percent. Also contributing to our airlines improved performance was a reduction The Amazon warrant revaluation loss, plus non- in year-over-year expense associated with scheduled cash amortization of the lease incentives also tied to airframe inspections. . y h p a r g o t o h P 2 P T N : y h p a r g o t o h p r o i r e t n I . m a h g n n n u C i l u a P : i n g s e D - . c n I , p u o r G s e c v r e S i Stock Information NASDAQ: ATSG. Company documents electronically filed with the SEC also may be found at www.atsginc.com. Registrar and Transfer Agent Computershare Investor Services (877) 581-5548 or (781) 575-2879 www.computershare.com/investor P.O. Box 30170 221 Quality Circle, Ste 210 College Station, TX 77842 Independent Auditors Deloitte & Touche LLP Cincinnati, Ohio Annual Meeting The annual meeting of stockholders will be May 10, 2018, at 11 a.m. local time at The Roberts Centre, 123 Gano Road, Wilmington, Ohio. Investor Relations Telephone inquiries may be directed to (937) 434-2700. Board of Directors Randy D. Rademacher Sr. Vice President and Chief Financial Officer for Reading Rock, Inc., a privately owned manufacturer and distributor of concrete products and other building materials, since 2008. Mr. Rademacher has been a Director of the Company since December 2006 and Chairman of the Board since May 2015. He is a member of both the Audit Committee and the Nominating and Governance Committee. Richard M. Baudouin Senior Advisor for Infinity Transportation, a company owned by Global Atlantic Financial Corp., since 2016. Prior to his current role at Infinity Transportation, Mr. Baudouin was a principal of Infinity Aviation Capital, LLC, an investment firm involved in aircraft leasing, from 2011 to 2016, and was a co-founder and former managing director of Aviation Capital Group, a commercial aircraft leasing company, from 1989 to 2010. Mr. Baudouin has been a Director of the Company since January 2013. He is the Chairman of the Nominating and Governance Committee and is a member of the Audit Committee. t r o p s n a r T r i A 8 1 0 2 © Joseph C. Hete President and Chief Executive Officer of Air Transport Services Group, Inc. and Chief Executive Officer of ABX Air, Inc. Mr. Hete has been with the company since 1980. Raymond E. Johns, Jr. (General USAF Ret.) Executive Vice President of FlightSafety International Inc., a global provider of flight training for commercial, business and military aviation professionals and flight simulation equipment, since 2014. Prior to his retirement from the military, Mr. Johns led the U.S. Air Force Air Mobility Command at Scott Air Force Base in Illinois. Mr. Johns has been a Director of the Company since October 2017. He is a member of both the Audit Committee and Nominating and Governance Committee. J. Christopher Teets Partner of Red Mountain Capital Partners LLC, an investment management firm, since 2005. Mr. Teets has been a Director of the Company since February 2009. He is the Chairman of the Compensation Committee and a member of the Nominating and Governance Committee. Jeffrey J. Vorholt Independent consultant and private investor. Mr. Vorholt was formerly a full-time faculty member at Miami University (Ohio) and concurrently an Adjunct Professor of Accountancy at Xavier University (Ohio) from 2001 to 2006. A CPA and attorney, he was the Chief Financial Officer of Structural Dynamics Resource Corporation from 1994 until its acquisition by EDS in 2001. Mr. Vorholt has been a Director of the Company since January 2004. He is the Chairman of the Audit Committee and is a member of the Compensation Committee. INSIDE FRONT COVER INSIDE BACK COVER 2017 Annual Report SM Air Transport Services Group, Inc. 145 Hunter Drive Wilmington, Ohio 45177 www.atsginc.com OUTSIDE BACK COVER OUTSIDE FRONT COVER 

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