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ATSG Air Transport Services

Filed: 8 Nov 21, 5:16pm

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period September 30, 2021
    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from ________ to ________

Commission file number 000-50368
________________________________________________________________
Air Transport Services Group, Inc.
(Exact name of registrant as specified in its charter)
________________________________________________________________
Delaware26-1631624
(State of Incorporation) (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 Exchange Act:
Title of each class  Trading SymbolName of each exchange on which registered
Common Stock, par value $0.01 per share  ATSGNASDAQ Stock Market LLC
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes No
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of 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 such files). Yes No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
  
Accelerated filerSmaller reporting company
Non-accelerated filerEmerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes No  
As of November 8, 2021, there were 74,199,254 shares of the registrant’s common stock outstanding.




AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
FORM 10-Q
TABLE OF CONTENTS




FILINGS WITH THE SECURITIES AND EXCHANGE COMMISSION
The financial information, including the financial statements, included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2020, filed with the Securities and Exchange Commission on March 1, 2021.
The Securities and Exchange Commission maintains an Internet site that contains reports, proxy and information statements and other information regarding Air Transport Services Group, Inc. at www.sec.gov. Additionally, our filings with the Securities and Exchange Commission, 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.

FORWARD LOOKING STATEMENTS
Statements contained in this Quarterly Report on Form 10-Q that are not historical facts are considered forward-looking statements (as that term is defined in the Private Securities litigation Reform Act of 1995). Words such as “future,” “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “predicts,” “will,” “would,” “could,” “can,” “may,” and similar terms and expressions are intended to identify forward-looking statements. These forward-looking statements are based on expectations, estimates and projections as of the date of this filing, and involve risks and uncertainties that are inherently difficult to predict. Actual results may differ materially from those expressed in the forward-looking statements for any number of reasons, including those described in this report and in our 2020 Annual Report filed on Form 10-K with the Securities and Exchange Commission.




















PART I. FINANCIAL INFORMATION
Item 1. Financial Statements
AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands, except share data)
 September 30,December 31,
 20212020
ASSETS
CURRENT ASSETS:
Cash, cash equivalents and restricted cash$49,808 $39,719 
Accounts receivable, net of allowance of $731 in 2021 and $997 in 2020191,746 153,511 
Inventory50,827 40,410 
Prepaid supplies and other20,008 39,096 
TOTAL CURRENT ASSETS312,389 272,736 
Property and equipment, net2,136,213 1,939,776 
Customer incentive108,712 126,007 
Goodwill and acquired intangibles508,357 516,290 
Operating lease assets61,351 68,824 
Other assets95,152 78,112 
TOTAL ASSETS$3,222,174 $3,001,745 
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable$151,064 $141,425 
Accrued salaries, wages and benefits58,342 56,506 
Accrued expenses16,117 19,005 
Current portion of debt obligations625 13,746 
Current portion of lease obligations17,292 17,784 
Unearned revenue and grants42,404 53,522 
TOTAL CURRENT LIABILITIES285,844 301,988 
Long term debt1,368,569 1,465,331 
Stock warrant obligations72,667 103,474 
Post-retirement obligations22,379 35,099 
Long term lease obligations44,461 51,128 
Other liabilities47,890 47,963 
Deferred income taxes197,528 141,265 
TOTAL LIABILITIES2,039,338 2,146,248 
Commitments and contingencies (Note H)00
STOCKHOLDERS’ EQUITY:
Preferred stock, 20,000,000 shares authorized, including 75,000 Series A Junior Participating Preferred Stock— — 
Common stock, par value $0.01 per share; 150,000,000 shares authorized; 74,199,254 and 59,560,036 shares issued and outstanding in 2021 and 2020, respectively742 596 
Additional paid-in capital991,650 855,547 
Retained earnings264,906 78,010 
Accumulated other comprehensive loss(74,462)(78,656)
TOTAL STOCKHOLDERS’ EQUITY1,182,836 855,497 
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY$3,222,174 $3,001,745 
See notes to condensed consolidated financial statements.
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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share data)
Three Months EndedNine Months Ended
 September 30,September 30,
 2021202020212020
REVENUES$465,955 $404,146 $1,251,915 $1,171,217 
OPERATING EXPENSES
Salaries, wages and benefits148,074 128,608 431,614 373,642 
Depreciation and amortization77,751 67,974 224,435 205,607 
Maintenance, materials and repairs43,751 48,767 131,671 134,148 
Fuel50,176 36,202 117,210 116,788 
Contracted ground and aviation services21,620 19,840 55,217 47,735 
Travel24,928 20,254 61,833 59,226 
Landing and ramp4,027 3,378 10,162 8,895 
Rent5,807 5,137 17,401 13,821 
Insurance3,178 3,119 9,382 7,295 
Other operating expenses17,205 18,623 48,378 49,577 
Government grants(30,322)(21,726)(96,626)(31,547)
Impairment of aircraft and related assets— — — 39,075 
366,195 330,176 1,010,677 1,024,262 
OPERATING INCOME99,760 73,970 241,238 146,955 
OTHER INCOME (EXPENSE)
Interest income93 36 217 
Non-service component of retiree benefit gains4,457 2,897 13,370 8,693 
Debt issuance costs— — (6,505)— 
Net gain (loss) on financial instruments(7,378)(53,393)37,797 (56,072)
Gain (loss) from non-consolidated affiliate(1,147)(2,485)(1,365)(11,762)
Interest expense(14,459)(15,440)(44,002)(47,808)
(18,519)(68,328)(669)(106,732)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES81,241 5,642 240,569 40,223 
INCOME TAX EXPENSE(18,878)(11,387)(56,047)(17,397)
EARNINGS (LOSS) FROM CONTINUING OPERATIONS62,363 (5,745)184,522 22,826 
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES2,309 154 2,374 4,162 
NET EARNINGS (LOSS)$64,672 $(5,591)$186,896 $26,988 
BASIC EARNINGS PER SHARE
Continuing operations$0.85 $(0.10)$2.75 $0.39 
Discontinued operations0.03 0.01 0.03 0.07 
TOTAL BASIC EARNINGS (LOSS) PER SHARE$0.88 $(0.09)$2.78 $0.46 
DILUTED EARNINGS PER SHARE
Continuing operations$0.81 $(0.10)2.14 0.38 
Discontinued operations0.03 0.01 0.03 0.07 
TOTAL DILUTED EARNINGS (LOSS) PER SHARE$0.84 $(0.09)2.17 0.45 
WEIGHTED AVERAGE SHARES
Basic73,721 59,146 67,177 59,106 
Diluted76,743 59,146 75,277 59,863 
See notes to condensed consolidated financial statements.
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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(In thousands)
Three Months EndedNine Months Ended
September 30,September 30,
2021202020212020
NET EARNINGS (LOSS)$64,672 $(5,591)$186,896 $26,988 
OTHER COMPREHENSIVE INCOME (LOSS):
Defined Benefit Pension1,362 726 4,086 2,178 
Defined Benefit Post-Retirement36 24 108 72 
TOTAL COMPREHENSIVE INCOME (LOSS), net of tax$66,070 $(4,841)$191,090 $29,238 

See notes to condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC.
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
(In thousands, except share data)
 Common StockAdditional
Paid-in
Capital
Accumulated Earnings (Deficit)Accumulated
Other
Comprehensive
Income (Loss)
Total
 NumberAmount
BALANCE AT JUNE 30, 202059,589,770 $596 $477,829 $78,474 $(60,366)$496,533 
Stock-based compensation plans
Grant of restricted stock— — — — 
Withholdings of common shares, net of issuances— — — — 
Forfeited restricted stock— — — — 
Reclassification of warrant liability221,093 221,093 
Amortization of stock awards and restricted stock1,835 1,835 
Total comprehensive income (loss)(5,591)750 (4,841)
BALANCE AT SEPTEMBER 30, 202059,589,770 $596 $700,757 $72,883 $(59,616)$714,620 
BALANCE AT JANUARY 1, 202059,329,431 $593 $475,720 $45,895 $(61,866)$460,342 
Stock-based compensation plans
Grant of restricted stock201,400 (2)— 
Issuance of common shares, net of withholdings59,439 (1,840)(1,839)
Forfeited restricted stock(500)— — — 
Reclassification of warrant liability221,093 221,093 
Amortization of stock awards and restricted stock5,786 5,786 
Total comprehensive income (loss)26,988 2,250 29,238 
BALANCE AT SEPTEMBER 30, 202059,589,770 $596 $700,757 $72,883 $(59,616)$714,620 

See notes to condensed consolidated financial statements.




















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AIR TRANSPORT SERVICES GROUP, INC.
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY, cont.
(In thousands, except share data)
Common StockAdditional
Paid-in
Capital
Accumulated Earnings (Deficit)Accumulated
Other
Comprehensive
Income (Loss)
Total
NumberAmount
BALANCE AT JUNE 30, 202174,202,815 $742 $989,611 $200,234 $(75,860)$1,114,727 
Stock-based compensation plans
Grant of restricted stock(761)— — — 
Withholdings of common shares, net of issuances— — (5)(5)
Forfeited restricted stock(2,800)— — — 
Conversion of warrants0— — — 
Amortization of stock awards and restricted stock2,044 2,044 
Total comprehensive income (loss)64,672 1,398 66,070 
BALANCE AT SEPTEMBER 30, 202174,199,254 $742 $991,650 $264,906 $(74,462)$1,182,836 
BALANCE AT JANUARY 1, 202159,560,036 $596 $855,547 $78,010 $(78,656)$855,497 
Stock-based compensation plans
Grant of restricted stock121,339 (1)— 
Issuance of common shares, net of withholdings92,234 (1,242)(1,241)
Forfeited restricted stock(2,800)— — — 
Conversion of warrants14,428,445 144 131,823 131,967 
Amortization of stock awards and restricted stock5,523 5,523 
Total comprehensive income (loss)186,896 4,194 191,090 
BALANCE AT SEPTEMBER 30, 202174,199,254 $742 $991,650 $264,906 $(74,462)$1,182,836 

See notes to condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
Nine Months Ended
September 30,
 20212020
OPERATING ACTIVITIES:
Net earnings from continuing operations$184,522 $22,826 
Net earnings from discontinued operations2,374 4,162 
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization249,574 229,280 
Pension and post-retirement5,433 2,916 
Deferred income taxes55,023 17,728 
Amortization of stock-based compensation5,524 5,786 
Loss from non-consolidated affiliates1,364 11,762 
Net (gain) loss on financial instruments(37,797)56,072 
Debt issuance costs6,505 — 
Impairment of aircraft and related assets— 39,075 
Changes in assets and liabilities:
Accounts receivable(38,235)13,066 
Inventory and prepaid supplies4,561 (8,927)
Accounts payable18,261 13,466 
Unearned revenue(11,545)49,605 
Accrued expenses, salaries, wages, benefits and other liabilities7,181 (8,623)
Pension and post-retirement balances(20,743)(20,920)
Other(2,764)(3,990)
NET CASH PROVIDED BY OPERATING ACTIVITIES429,238 423,284 
INVESTING ACTIVITIES:
Expenditures for property and equipment(428,126)(394,295)
Proceeds from property and equipment3,524 9,210 
Investments in businesses(2,155)(9,053)
NET CASH USED IN INVESTING ACTIVITIES(426,757)(394,138)
FINANCING ACTIVITIES:
Principal payments on long term obligations(1,758,018)(584,923)
Proceeds from revolving credit facilities1,430,600 80,000 
Payments for financing costs(3,099)(7,507)
Proceeds from bond issuance207,400 500,000 
Proceeds from exercise of warrants131,967 — 
Withholding taxes paid for conversion of employee stock awards(1,242)(1,839)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES7,608 (14,269)
NET INCREASE IN CASH AND CASH EQUIVALENTS10,089 14,877 
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR39,719 46,201 
CASH AND CASH EQUIVALENTS AT END OF PERIOD$49,808 $61,078 
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized$39,104 $36,060 
Federal and state income taxes paid$1,859 $758 
SUPPLEMENTAL NON-CASH INFORMATION:
Accrued expenditures for property and equipment$27,358 $25,832 
See notes to condensed to consolidated financial statements.
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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS



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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 lease aircraft, provide contracted airline operations, ground services, aircraft modification and maintenance services and other support services mainly to the air transportation, e-commerce 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 Company's airlines, ABX Air, Inc. (“ABX”), Air Transport International, Inc. (“ATI”) and Omni Air International, LLC ("OAI") each have the authority, through their separate U.S. Department of Transportation ("DOT") and Federal Aviation Administration ("FAA") certificates, to transport cargo worldwide. Additionally, both ATI and OAI each have the authority to conduct passenger charter operations 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 customers' transportation networks through "CMI" and "ACMI" agreements and through charter contracts in which aircraft fuel is also included. In addition to its aircraft leasing and airline services, the Company sells aircraft parts, provides aircraft maintenance and modification services, sells and services material handling equipment and arranges load transfer and package sorting services for customers.
Basis of Presentation
The financial statements of the Company are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). The accompanying unaudited condensed interim consolidated financial statements are prepared in conformity with GAAP and such principles are applied on a basis consistent with the financial statements reflected in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020, filed with the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations promulgated by the SEC related to interim financial statements. In the opinion of management, the accompanying financial statements contain all adjustments, including normal recurring adjustments, necessary for the fair presentation of the Company's results of operations and financial position for the periods presented. Due to seasonal fluctuations, among other factors common to the air cargo industry, the results of operations for the periods presented are not necessarily indicative of the results of operations to be expected for the entire year or any interim period. The preparation of consolidated financial statements requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. The accounting estimates reflect the best judgment of management, but actual results could differ materially from those estimates.
The accompanying condensed consolidated financial statements include the accounts of Air Transport Services Group, Inc. and its wholly-owned subsidiaries. Inter-company balances and transactions are eliminated. Investments in affiliates in which the Company has significant influence but does not exercise control are accounted for using the equity method of accounting. Under the equity method, the Company's share of the 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. Investments in affiliates in which the Company does not exercise control or have significant influence are reflected at cost less impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.
COVID-19 Uncertainties
The COVID-19 pandemic has had an impact on the Company's operations and financial results. Beginning in late February 2020, revenues have been disrupted when customers cancelled scheduled passenger flights and aircraft maintenance services, airport restrictions and closures were imposed and the Company began to incur additional costs, including expenses to protect employees. Additionally in 2021, a vendor that converts the Company's
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passenger aircraft into freighter aircraft has experienced supply chain disruptions for various parts that has delayed the conversion of aircraft expected to be completed this year by several weeks.
The extent of the impact that the pandemic will have on future financial and operational results will depend on developments, including recurrence of the COVID-19 virus and its variants; the duration and scope of government orders and restrictions; the availability and effectiveness of vaccines on the virus and the extent of the pandemic on overall economic conditions. These are highly uncertain. Disruptions to the Company's operations, such as shortages of personnel, shortages of parts, maintenance delays, shortages of transportation and hotel accommodations for flight crews, facility closures and other issues may occur. If the pandemic persists or reemerges, operating cash flows could decline significantly and the value of airframes, engines and certain intangible assets could decline significantly.
The pandemic has not had a significant adverse financial impact on the Company's leasing operations or its airline operations for customers' freight networks. However, the Company's passenger flight operations have been and continue to be, impacted by the pandemic. The Company has received government funding pursuant to payroll support programs of the federal government as described in Note H. Management believes that the Company's current cash balances and forecasted cash flows provided from its customer leases, operating agreements and government grants combined with its Senior Credit Agreement, will be sufficient to fund operations, capital spending and scheduled debt payments for at least the next 12 months.
Accounting Standards Updates
In August 2020, the FASB issued ASU No. 2020-06, "Accounting for Convertible Instruments and Contracts in an Entity's Own Equity" ("ASU 2020-06"). This new standard changes the accounting and measurement of convertible instruments. It eliminates the treasury stock method for convertible instruments and requires application of the “if-converted” method for certain agreements. This standard is effective for the Company beginning January 1, 2022. The Company is currently evaluating the impact of adopting ASU 2020-06 on its interest expense and earnings (loss) per share calculation under the "if-converted" method related to its convertible debt.

NOTE B—GOODWILL, INTANGIBLES AND EQUITY INVESTMENTS
The carrying amounts of goodwill, by operating segment, are as follows (in thousands):
CAMACMI ServicesAll OtherTotal
Carrying value as of December 31, 2020153,290 234,571 $8,113 $395,974 
Carrying value as of September 30, 2021$153,290 $234,571 $8,113 $395,974 
The Company's acquired intangible assets are as follows (in thousands):
AirlineAmortizing
CertificatesIntangiblesTotal
Carrying value as of December 31, 2020$9,000 $111,316 $120,316 
Amortization— (7,933)(7,933)
Carrying value as of September 30, 2021$9,000 $103,383 $112,383 
The airline certificates have an indefinite life and therefore are not amortized. The Company amortizes finite-lived intangibles assets, including customer relationships, over 5 to 18 remaining years.

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Stock warrants issued to a lessee (see Note C) as an incentive are recorded as a lease incentive asset using their fair value at the time that the lessee has met its performance obligations and if probable of vesting at the time of issuance, 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):
Lease
Incentive
Carrying value as of December 31, 2020$126,007 
Amortization(17,295)
Carrying value as of September 30, 2021$108,712 
In January 2014, the Company acquired a 25 percent equity interest in West Atlantic AB of Gothenburg, Sweden ("West"). West, through its two airlines, West Atlantic UK and West Atlantic Sweden, 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. In April 2019, West issued additional shares to a new investor in conjunction with a capital investment and purchase agreement which reduced the Company's ownership to approximately 10% and reduced the Company's influence over West. In 2020, the Company sold its remaining interest to the same investor.
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. Approval of a supplemental type certificate from the FAA was granted in April 2021 and aircraft conversions began in 2021. The Company expects to make contributions equal to its 49% ownership percentage of the joint-venture's liquidity needs. During the first nine months of 2021 and 2020, the Company contributed $2.5 million and $9.1 million to the joint venture, respectively. The Company accounts for its investment in the aircraft conversion joint venture under the equity method of accounting, in which the carrying value of each investment is reduced for the Company's share of the non-consolidated affiliate's operating results.
The carrying value of the joint venture is reflected in “Other Assets” in the Company’s consolidated balance sheets. 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 C—SIGNIFICANT CUSTOMERS
Three customers each account for a significant portion of the Company's consolidated revenues. The percentage of the Company's revenues for the Company's three largest customers, for the three and nine month periods ending September 30, 2021 and 2020 are as follows:
Three Months EndedNine Months Ended
September 30,September 30,
2021202020212020
CustomerPercentage of RevenuePercentage of Revenue
DoD31%33%26%33%
Amazon33%29%35%29%
DHL12%13%13%12%

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The accounts receivable from the Company's three largest customers as of September 30, 2021, and December 31, 2020, are as follows (in thousands):
September 30,December 31,
20212020
CustomerAccounts Receivable
DoD$53,648 $32,625 
Amazon68,903 55,997 
DHL15,546 10,471 
DoD
The Company is a provider of cargo and passenger airlift services to the United States Department of Defense ("DoD"). The DoD awards flights to U.S. certificated airlines through annual contracts and through temporary "expansion" routes.
Amazon
The Company has been providing freighter aircraft and services for cargo handling and logistical support for Amazon.com Services, LLC ("ASI"), successor to Amazon.com 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 Boeing 767 freighter aircraft to ASI. The ATSA also provides for the operation of aircraft by the Company’s airline subsidiaries, maintenance services and the management of ground services by the Company's subsidiary, LGSTX Services Inc. ("LGSTX"). The aircraft leases have terms which expire between March of 2023 and March of 2031.
DHL
The Company has had long term contracts with DHL Network Operations (USA), Inc. and its affiliates ("DHL") since August 2003. 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 additional air cargo transportation services for DHL through 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.
Amazon Investment Agreement
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 provided for the Company to issue warrants in three tranches which granted Amazon the right to acquire up to 19.9% of the Company’s outstanding common shares. The first tranche of warrants, issued upon the execution of the Investment Agreement granted Amazon the right to purchase approximately 12.81 million ATSG common shares, with the first 7.69 million common shares vesting upon issuance on March 8, 2016, and the remaining 5.12 million common shares vesting as the Company delivered additional aircraft leased under the ATSA. The second tranche of warrants, which were issued and vested on March 8, 2018, granted Amazon the right to purchase approximately 1.59 million ATSG common shares. The third tranche of warrants vested on September 8, 2020, and granted Amazon the right to purchase an additional 0.5 million ATSG common shares to bring Amazon’s ownership potential, after the exercise in full of the three tranches of warrants, 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 2016 Investment Agreement and after giving effect to the warrants granted. The exercise price of the 14.9 million warrants issued under the 2016 Investment Agreement was $9.73 per share, which represents the closing price of ATSG’s common shares on February 9, 2016. These warrants had an expiration date of March 8, 2021 subject to extension if regulatory approvals, exemptions, authorizations, consents or clearances had not been obtained by such date.
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On March 5, 2021, Amazon exercised warrants from the 2016 Investment Agreement for 865,548 shares of the Company's common stock through a cashless exercise by forfeiting 480,047 warrants from the 2016 Investment Agreement as payment. For the cashless exchange, ATSG shares were valued at $27.27 per share, its volume-weighted average price for the previous 30 trading days immediately preceding March 5, 2021. Also on March 5, 2021, Amazon notified the Company of its intent to exercise warrants from the 2016 Investment agreement for 13,562,897 shares of the Company's common stock by paying $132.0 million of cash to the Company. This exercise was contingent upon the approval of the United States Department of Transportation, and the expiration or termination of any applicable waiting period pursuant to the Hart-Scott-Rodino Antitrust Improvements Act of 1976. After receiving all required regulatory approvals and clearances, Amazon remitted the funds to the Company on May 7, 2021, and the Company issued the corresponding shares of common stock, completing the warrant exercise.
On December 22, 2018, the Company announced agreements with Amazon to 1) lease and operate ten additional Boeing 767-300 aircraft for ASI, 2) extend the term of the 12 Boeing 767-200 aircraft currently leased to ASI by two years to 2023 with an option for three more years, 3) extend the term of the eight Boeing 767-300 aircraft currently leased to ASI by three years to 2026 and 2027 with an option for three more years and 4) extend the ATSA by five years through March 2026, with an option to extend for an additional three years. The Company leased all ten of the 767-300 aircraft in 2020. In conjunction with the commitment for ten additional 767 aircraft leases, extensions of twenty existing Boeing 767 aircraft leases and the ATSA described above, Amazon and the Company entered into another Investment Agreement on December 20, 2018. Pursuant to the 2018 Investment Agreement, Amazon was issued additional warrants for 14.8 million common shares. This group of warrants will expire if not exercised within seven years from their issuance date, in December of 2025 (subject to extension if regulatory approvals, exemptions, authorizations, consents or clearances have not been obtained by such date). The warrants have an exercise price of $21.53 per share.
On May 29, 2020, Amazon agreed to lease twelve more Boeing 767-300 aircraft from the Company. The first of these leases began in the second quarter of 2020, eight more leases were executed through the first nine months of 2021 and the remaining three aircraft to be delivered before the end of 2021. All twelve of these aircraft leases will be for ten year terms. Pursuant to the 2018 Investment Agreement, as a result of leasing 12 aircraft, Amazon was issued warrants for 7.0 million common shares of which 5.3 million common shares have vested. These warrants will expire if not exercised by December 20, 2025 (subject to extension if regulatory approvals, exemptions, authorizations, consents or clearances have not been obtained by such date). The exercise price of these warrants is $20.40 per share.
Issued and outstanding warrants are summarized below as of September 30, 2021:
Common Shares in millions
Lease CommitmentExercise priceVestedNon-VestedExpiration
2018 Investment Agreement10 aircraft$21.5314.80.0December 20, 2025
2018 Investment Agreement12 aircraft$20.405.31.8December 20, 2025
Additionally, Amazon can earn incremental warrant rights for up to 2.9 million common shares under the 2018 Investment Agreement by leasing up to five more cargo aircraft from the Company before January 2026. Incremental warrants granted for Amazon’s commitment to any such future aircraft leases will have an exercise price based on the volume-weighted average price of the Company's shares during the 30 trading days immediately preceding the contractual commitment for each lease.
For all outstanding warrants vested, Amazon may select a cashless conversion option. Assuming ATSG’s stock price at the time of conversion is above the warrant exercise price, Amazon would receive fewer shares in exchange for any warrants exercised under the cashless option by surrendering the number of shares with a market value equal to the exercise value.
The Company’s accounting for the warrants has been determined in accordance with the financial reporting guidance for financial instruments. Warrants classified as liabilities are marked to fair value at the end of each reporting period. The value of warrants is recorded as a customer incentive asset if it is probable of vesting at the
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time of grant and further changes in the fair value of warrant obligations are recorded to earnings. Upon a warrant vesting event, the customer incentive asset is amortized as a reduction of revenue over the duration of the related revenue contract.
In accordance with the 2016 Investment Agreement, on September 8, 2020, the final number of shares issuable under the third tranche of warrants was determined to be 0.5 million common shares. As a result, under US GAAP, the value of the entire warrant grant under the 2016 Investment Agreement was remeasured on September 8, 2020, and their fair value of $221 million was reclassified from balance sheet liabilities to paid-in-capital. In October 2020, upon the execution of the 10th and final aircraft lease of the December 2018 commitment, warrants for 14.8 million shares from the 2018 Investment Agreement were vested. As a result, under US GAAP, the value of this entire grant was remeasured on October 1, 2020, and their fair value of $154 million was reclassified from balance sheet liabilities to paid-in-capital.
As of September 30, 2021, the Company's liabilities reflected warrants primarily from the 2018 Investment agreement for the May 2020 lease commitment, having a fair value of $72.7 million. During the three and nine month periods ended September 30, 2021, the re-measurements of warrants to fair value resulted in net non-operating losses of $9.6 million and net gains of $30.8 million before the effect of income taxes, respectively, compared to losses of $55.9 million and gains of $48.3 million for the corresponding periods of 2020.
The Company's earnings in future periods will be impacted by 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.

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 comparable transactions. The fair value of the Company’s money market funds, 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 resulting from aircraft leased to Amazon were determined using a Black-Scholes pricing model which considers various assumptions, including the Company’s common stock price, the volatility of the Company’s common stock, the expected dividend yield, exercise price and the risk-free interest rate (Level 2 inputs). The fair value of the stock warrant obligations for unvested stock warrants, conditionally granted to Amazon for the execution of incremental, future aircraft leases, include additional assumptions including the expected exercise prices and the probabilities that future leases will occur (Level 3 inputs).
The following table reflects assets and liabilities that are measured at fair value on a recurring basis (in thousands):
As of September 30, 2021Fair Value Measurement UsingTotal
 Level 1Level 2Level 3
Assets
Cash equivalents—money market$— $25,041 $— $25,041 
Total Assets$— $25,041 $— $25,041 
Liabilities
Interest rate swap$— $(6,425)$— $(6,425)
Stock warrant obligations— — (72,667)(72,667)
Total Liabilities$— $(6,425)$(72,667)$(79,092)

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As of December 31, 2020Fair Value Measurement UsingTotal
 Level 1Level 2Level 3
Assets
Cash equivalents—money market$— $20,389 $— $20,389 
Total Assets$— $20,389 $— $20,389 
Liabilities
Interest rate swap$— $(13,414)$— $(13,414)
Stock warrant obligation— (9,058)(94,416)(103,474)
Total Liabilities$— $(22,472)$(94,416)$(116,888)
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 $49.0 million more than the carrying value, which was $1,369.2 million at September 30, 2021. As of December 31, 2020, the fair value of the Company’s debt obligations was approximately $70.8 million less than the carrying value, which was $1,479.1 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):
 
September 30,December 31,
 20212020
Flight equipment$3,196,849 $2,856,142 
Ground equipment63,074 65,857 
Leasehold improvements, facilities and office equipment38,749 36,193 
Aircraft modifications and projects in progress271,098 231,451 
3,569,770 3,189,643 
Accumulated depreciation(1,433,557)(1,249,867)
Property and equipment, net$2,136,213 $1,939,776 
CAM owned aircraft with a carrying value of $1,343.7 million and $1,097.6 million that were under lease to external customers as of September 30, 2021, and December 31, 2020, respectively.
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 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 are 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.

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NOTE F—DEBT OBLIGATIONS
Debt obligations consisted of the following (in thousands):
 September 30,December 31,
 20212020
Senior Notes$697,046 $493,376 
Revolving credit facility432,000 140,000 
Unsubordinated term loans— 612,169 
Convertible debt229,300 222,391 
Other financing arrangements10,848 11,141 
Total debt obligations1,369,194 1,479,077 
Less: current portion(625)(13,746)
Total long term obligations, net$1,368,569 $1,465,331 
The Company utilizes a syndicated credit agreement ("Senior Credit Agreement") which, as of September 30, 2021, included unsubordinated term loans and a revolving credit facility. Prior to its amendment on April 6, 2021, the Senior Credit Agreement had a maturity date of November 2024 provided certain liquidity measures are maintained through 2024, an incremental accordion capacity based on debt ratios, and a maximum revolver capacity of $600.0 million. The interest rate is a pricing premium added to LIBOR based upon the the Company's debt to its earnings before interest, taxes, depreciation and amortization expenses ("EBITDA") as defined under the Senior Credit Agreement.
On April 6, 2021, the Company amended the Senior Credit Agreement ("Amended Credit Agreement"). The Amended Credit Agreement: (i) temporarily increased the aggregate amount of the revolving credit facility from $600 million to $1 billion, and subsequently decreased the aggregate amount to $800.0 million on April 13, 2021, (ii) permits increases of the revolving credit facility commitments and/or new tranches of terms loans in an aggregate principal amount equal to the sum of $400 million plus the principal amount of indebtedness that could be incurred at the time of the increase that would not cause the Secured Leverage Ratio (as defined in the Amended Credit Agreement) to exceed 3.25 to 1.00 on a pro forma basis, (iii) modified the maturity date of the agreement from November 30, 2024, to April 6, 2026, with such extension of the maturity date being subject to (1) at the election of the Lenders, five one year extensions and (2) an earlier springing maturity date of July 12, 2024, if, on such date, (a) more than $75,000,000 in aggregate principal amount of the Company’s 1.125% senior convertible notes due 2024 remain outstanding and (b) the Company has less than $375,000,000 of liquidity at such time, (iv) removed the Collateral to Total Exposure Ratio (as defined in the agreements) as a financial covenant, and (v) prepaid the entire outstanding balance of all term loans at the time of the amendment.
On January 28, 2020, the Company, through a subsidiary, completed a debt offering of $500.0 million in senior unsecured notes (the “Senior Notes”). The Senior Notes were sold only to qualified institutional buyers in the United States pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and certain investors pursuant to Regulation S under the Securities Act. The Senior Notes are senior unsecured obligations that bear interest at a rate of 4.75% per year, payable semiannually in arrears on February 1 and August 1 of each year, beginning on August 1, 2020. The Senior Notes will mature on February 1, 2028. The Senior Notes contain customary events of default and certain covenants which are generally no more restrictive than those set forth in the Senior Credit Agreement. The net proceeds of $495.0 million from the Senior Notes were used to pay down the revolving credit facility. The Senior Notes do not require principal payments until maturity but prepayments are allowed without penalty beginning February 1, 2025.
On April 13, 2021, the Company, through a subsidiary, completed its offering of $200.0 million of additional notes ("Additional Notes") under the existing Senior Notes. The Additional Notes are fully fungible with the Senior Notes, treated as a single class for all purposes under the indenture governing the existing notes with the same terms as those of the existing notes (other than issue date and issue price). The proceeds of $205.5 million, net of scheduled interest payable, were used, in conjunction with draws from the revolving credit facility to repay the unsubordinated term loans. Upon retirement of the unsubordinated term loans, the company expensed debt issuance costs of $6.5 million related to the unsubordinated term loans.
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As of September 30, 2021, the unused revolving credit facility available to the Company at the trailing twelve month EBITDA level was $353.3 million, and additional permitted indebtedness under the Senior Credit Agreement subject to compliance with other covenants, was limited to $250.0 million.
The balance of the Senior Notes is net of debt issuance costs of $8.1 million and $6.6 million as of September 30, 2021 and December 31, 2020, respectively. The balance of the unsubordinated term loan was net of debt issuance costs of $7.0 million as of December 31, 2020. Under the terms of the Senior Credit Agreement, interest rates are adjusted at least 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 revolving credit facility bears a variable interest rate of 1.09%. The Senior Notes bears a fixed rate of 4.75%.
The Senior Credit Agreement is collateralized by certain of the Company's Boeing 777, 767 and 757 aircraft. Under the terms of the Senior Credit Agreement, the Company is required to maintain certain collateral coverage ratios set forth in the Senior Credit Agreement. The Senior Credit Agreement limits the amount of dividends the Company can pay and the amount of common stock it can repurchase to $100.0 million during any calendar year, provided the Company's total debt to EBITDA ratio is under 3.50 times and the secured debt to EBITDA ratio is under 3.0 times, after giving effect to the dividend or repurchase. The Senior Credit Agreement contains covenants, including a maximum permitted total EBITDA to debt ratio, a fixed charge covenant ratio requirement, limitations on certain additional indebtedness, and on guarantees of indebtedness. 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.
In September 2017, the Company issued $258.8 million aggregate principal amount of 1.125% Convertible Senior Notes due 2024 ("Convertible Notes") in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act. The Convertible Notes bear interest at a rate of 1.125% per year payable semi-annually in arrears on April 15 and October 15 each year. The Convertible Notes 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. Conversion of the Convertible Notes can only occur upon satisfaction of certain conditions and during certain periods 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 Convertible 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.
The Convertible 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 Convertible 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 Convertible Notes) occurs, the Company will, in certain circumstances, increase the conversion rate for a specified period of time.
In conjunction with the Convertible Notes, the Company purchased convertible note hedges under privately negotiated transactions for $56.1 million, having the same number of the Company's common shares, 8.1 million shares and same strike price of $31.90, that underlie the Convertible 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 Convertible Notes. The Company's current intent and policy is to settle all Note conversions through a combination settlement which satisfies the principal amount of the Convertible Notes outstanding with cash. The Convertible Notes could have a dilutive effect on the computation of earnings per share in accordance with accounting principles to the extent that the average traded market price of the Company’s common shares for a reporting period exceeds the conversion price.

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The net proceeds from the issuance of the Convertible Notes was 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.
September 30,December 31,
20212020
Principal value, Convertible Senior Notes, due 2024258,750 258,750 
Unamortized issuance costs(3,144)(3,894)
Unamortized discount(26,306)(32,465)
Convertible debt229,300 222,391 
In conjunction with the offering of the Convertible 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 amount received for these warrants and recorded in Stockholders' Equity in the Company’s consolidated balance sheets was $38.5 million. These warrants could result in 8.1 million additional shares of the Company's common stock, if the Company's traded market price exceeds the strike price which is $41.35 per share and is subject to certain adjustments under the terms of the warrant transactions. The warrants could have a dilutive effect on the computation of earnings per share to the extent that the average traded market price of the Company's common shares for a reporting period exceeds the strike price.

NOTE G—DERIVATIVE INSTRUMENTS
The Company's Senior Credit Agreement required the Company to maintain derivative instruments for protection from fluctuating interest rates, for at least twenty-five percent of the outstanding balance of the term loan issued in November 2018. The table below provides information about the Company’s interest rate swaps (in thousands):
  September 30, 2021December 31, 2020
Expiration DateStated
Interest
Rate
Notional
Amount
Market
Value
(Liability)
Notional
Amount
Market
Value
(Liability)
May 5, 20211.090 %— — 13,125 (41)
May 30, 20211.703 %— — 13,125 (80)
December 31, 20212.706 %133,125 (889)138,750 (3,551)
March 31, 20221.900 %50,000 (454)50,000 (1,116)
March 31, 20221.950 %75,000 (701)75,000 (1,722)
March 31, 20232.425 %135,000 (4,381)140,625 (6,904)
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 and losses into the statement of operations. The Company recorded net gains on derivatives of $2.2 million and $7.0 million for the three and nine month periods ending September 30, 2021, respectively, compared to a net gain of $2.5 million and a net loss of $7.7 million for the corresponding periods of 2020. The liability for outstanding derivatives is recorded in other liabilities and in accrued expenses.


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NOTE H—COMMITMENTS AND CONTINGENCIES
CARES Act and Payroll Support Programs
During 2020, two of the Company's airline subsidiaries, OAI and ATI, received government funds totaling $75.8 million pursuant to payroll support program agreements under the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”). In February of 2021, OAI was approved for $37.4 million of additional non-repayable government funds pursuant to a payroll support program agreement under Subtitle A of Title IV of Division N of the Consolidated Appropriations Act, 2021 (the “PSP Extension Law”). This grant was subsequently increased by $5.6 million. Further, in April 2021, OAI was approved for $40.0 million of additional non-repayable government grants pursuant to a payroll support program agreement under section 7301 of the American Rescue Plan Act of 2021 (the “American Act”).
The three programs are structured in a substantially similar manner. These grants are not required to be repaid if the Company complies with provisions of the CARES Act, the PSP Extension Law, the American Act and the payroll support program agreements. The grants are recognized over the periods in which the Company recognizes the related expenses for which the grants are intended to compensate. The Company recognizes the grants as contra-expense during the periods in which passenger flight operations and combi flight operations are expected to be negatively impacted by the pandemic. During the three and nine month periods ended September 30, 2021, the Company recognized $30.3 million and $96.6 million of the grants, respectively. The Company expects to recognize all of grant funds into earnings by December 31, 2021. As of September 30, 2021, grants approved and received but not recognized totaled $15.0 million.
In conjunction with the payroll support program agreements, the airlines agreed to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through September 30, 2020. OAI further agreed to refrain from conducting involuntary furloughs or reducing employee rates of pay or benefits through September 30, 2021. The airlines agreed to limit, on behalf of themselves and certain of their affiliates, executive compensation through March 24, 2022; maintain certain air transportation service through March 1, 2022 as may be required by the U.S. Department of Transportation pursuant to its authority under the CARES Act; and maintain certain internal controls and records relating to the funds and comply with certain reporting requirements. OAI further agreed to limit executive compensation through April 1, 2023. In addition, the Company may not pay dividends or repurchase its shares through September 30, 2022.
Lease Commitments
The Company leases property, eight aircraft, aircraft engines and other types of equipment under operating leases. Property leases include hangars, warehouses, offices and other space at certain airports with fixed rent payments and lease terms ranging from one month to six years. The Company is obligated to pay the lessor for maintenance, real estate taxes, insurance and other operating expenses on certain property leases. These expenses are variable and are not included in the measurement of the lease asset or lease liability. These expenses are recognized as variable lease expense when incurred and are not material. Equipment leases include ground support and industrial equipment as well as computer hardware with fixed rent payments and terms of one month to five years.
The Company records the initial right-to-use asset and lease liability at the present value of lease payments scheduled during the lease term. For the nine month period ending September 30, 2021, non-cash transactions to recognize right-to-use assets and corresponding liabilities for new leases were $8.3 million compared to $26.4 million for the corresponding period of 2020. Unless the rate implicit in the lease is readily determinable, the Company discounts the lease payments using an estimated incremental borrowing rate at the time of lease commencement. The Company estimates the incremental borrowing rate based on the information available at the lease commencement date, including the rate the Company could borrow for a similar amount, over a similar lease term with similar collateral. The Company's weighted-average discount rate for operating leases at September 30, 2021 was 2.51% compared to 2.9% at December 31, 2020. Leases often include rental escalation clauses, renewal options and/or termination options that are factored into the determination of lease payments when appropriate. Although not material, the amount of such options is reflected below in the maturity of operating lease liabilities table. Lease expense is recognized on a straight-line basis over the lease term. Our weighted-average remaining lease term is 3.9 years and 4.5 years as of September 30, 2021 and December 31, 2020, respectively.
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For the nine month periods ended September 30, 2021 and 2020, cash payments against operating lease liabilities were $15.4 million and $12.8 million, respectively. As of September 30, 2021, the maturities of operating lease liabilities are as follows (in thousands):
Operating Leases
Remaining 2021$4,884 
202218,017 
202316,339 
202412,841 
20259,080 
2026 and beyond3,591 
Total undiscounted cash payments64,752 
Less: amount representing interest(2,999)
Present value of future minimum lease payments61,753 
Less: current obligations under leases17,292 
Long-term lease obligation$44,461 
Purchase Commitments
The Company has agreements with vendors for the conversion of Boeing 767-300, Airbus A321 and Airbus A330 passenger aircraft into standard configured freighter aircraft. The conversions primarily consist of the installation of a standard cargo door and loading system. As of September 30, 2021, the Company owned fifteen Boeing 767-300 aircraft and one Airbus A321-200 aircraft that were in or awaiting the modification process. As of September 30, 2021, the Company has agreements to purchase twelve more Boeing 767-300 passenger aircraft and two Airbus 321-200 passenger aircraft through 2024. As of September 30, 2021, the Company's commitments to acquire aircraft and convert them totaled $412.8 million.
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 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.

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Employees Under Collective Bargaining Agreements
As of September 30, 2021, the flight crewmember employees of ABX, ATI and Omni and flight attendant employees of ATI and Omni were represented by the labor unions listed below:
AirlineLabor Agreement UnitPercentage of
the Company’s
Employees
ABXInternational Brotherhood of Teamsters4.8%
ATIAir Line Pilots Association9.2%
OAIInternational Brotherhood of Teamsters6.2%
ATIAssociation of Flight Attendants0.6%
OAIAssociation of Flight Attendants5.8%

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 crewmembers, 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 obligations. 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.
ABX’s net periodic benefit costs for its defined benefit pension plans and post-retirement healthcare plans for both continuing and discontinued operations are as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
 Pension PlansPost-Retirement Healthcare PlanPension PlansPost-Retirement Healthcare Plan
 20212020202120202021202020212020
Service cost$— $— $24 $35 — — 72 104 
Interest cost5,597 6,970 10 23 16,791 20,910 30 68 
Expected return on plan assets(11,875)(11,168)— — (35,625)(33,504)— — 
Amortization of net loss1,764 941 47 31 5,292 2,823 141 93 
Net periodic benefit cost (income) loss$(4,514)$(3,257)$81 $89 $(13,542)$(9,771)$243 $265 

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During the nine month period ending September 30, 2021, the Company contributed $1.8 million to the pension plans.

NOTE J—INCOME TAXES
The provision for income taxes for interim periods is based on management's best estimate of the effective income tax rate expected to be applicable for the current year, plus any adjustments arising from changes in the estimated amount of taxable income related to prior periods. Income taxes recorded through September 30, 2021 have been estimated utilizing a 23% rate based upon year-to-date income and projected results for the full year. The recognition of discrete tax items, such as the conversion of employee stock awards, the issuance of stock warrants and other items, have an impact on the effective rate during a period.
As a result of these differences in which expenses and benefits for tax purposes are different than required by generally accepted accounting principles, the Company's effective tax rate for the first nine months of 2021 was 23.2%. The final effective tax rate for the year 2021 will depend on the actual amount of pre-tax book results by the Company for the full year, the additional conversions of employee stock awards, stock warrant valuations, executive compensation and other items.
The Company has operating loss carryforwards for U.S. federal income tax purposes. Management expects to utilize the loss carryforwards to offset federal income tax liabilities in the future. Due to the Company's deferred tax assets, including its loss carryforwards, management does not expect to pay federal income taxes until 2024 or later. The Company may, however, be required to pay some federal tax due to loss carryforward usage limitations and certain state and local income taxes before then.


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NOTE K—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Accumulated other comprehensive income (loss) includes the following items by components for the three and nine month periods ending September 30, 2021 and 2020 (in thousands):
Defined Benefit PensionDefined Benefit Post-RetirementForeign Currency TranslationTotal
Balance as of June 30, 2020(59,700)(654)(12)(60,366)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)941 31 — 972 
Income Tax (Expense) or Benefit(215)(7)— (222)
Other comprehensive income, net of tax726 24 — 750 
Balance as of September 30, 2020(58,974)(630)(12)(59,616)
Balance as of January 1, 2020(61,152)(702)(12)(61,866)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)2,823 93 — 2,916 
Income Tax (Expense) or Benefit(645)(21)— (666)
Other comprehensive income, net of tax2,178 72 — 2,250 
Balance as of September 30, 2020(58,974)(630)(12)(59,616)

Defined Benefit PensionDefined Benefit Post-RetirementForeign Currency TranslationTotal
Balance as of June 30, 2021(75,369)(477)(14)(75,860)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)1,764 47 — 1,811 
Income Tax (Expense) or Benefit(402)(11)— (413)
Other comprehensive income, net of tax1,362 36 — 1,398 
Balance as of September 30, 2021(74,007)(441)(14)(74,462)
Balance as of January 1, 2021(78,093)(549)(14)(78,656)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)5,292 141 — 5,433 
Income Tax (Expense) or Benefit(1,206)(33)— (1,239)
Other comprehensive income, net of tax4,086 108 — 4,194 
Balance as of September 30, 2021(74,007)(441)(14)(74,462)
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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.
 Nine Months Ended
 September 30, 2021September 30, 2020
 Number of
Awards
Weighted
average
grant-date
fair value
Number of
Awards
Weighted
average
grant-date
fair value
Outstanding at beginning of period1,085,023 $17.14 963,832 $17.67 
Granted273,845 26.65 437,054 18.85 
Converted(120,830)25.40 (200,563)19.87 
Expired(1,200)26.60 (34,100)19.40 
Forfeited(5,600)23.31 (1,000)18.90 
Outstanding at end of period1,231,238 $18.41 1,165,223 $17.69 
Vested357,499 $9.26 353,023 $8.25 
The average grant-date fair value of each performance condition award, non-vested restricted stock award and time-based award granted by the Company in 2021 was $26.69, 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 in 2021 was $26.50. The market condition awards were valued using a Monte Carlo simulation technique based on volatility over three years for the awards granted in 2021 using daily stock prices and using the following variables:
2021
Risk-free interest rate0.3%
Volatility39.7%
For the nine month periods ended September 30, 2021 and 2020, the Company recorded expense of $5.5 million and $5.8 million, respectively, for stock incentive awards. At September 30, 2021, there was $8.6 million of unrecognized expense related to the stock incentive awards that is expected to be recognized over a weighted-average period of 1.3 years. As of September 30, 2021, none of the awards were convertible, 357,499 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 1,527,488 additional outstanding shares of the Company’s common stock depending on service, performance and market results through December 31, 2023.

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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):
Three Months EndingNine Months Ending
September 30,September 30,
 2021202020212020
Numerator:
Earnings from continuing operations - basic$62,363 $(5,745)$184,522 $22,826 
Gain from stock warrants revaluation, net of tax— — (23,776)— 
Earnings from continuing operations - diluted$62,363 $(5,745)$160,746 $22,826 
Denominator:
Weighted-average shares outstanding for basic earnings per share73,721 59,146 67,177 59,106 
Common equivalent shares:
Effect of stock-based compensation awards and warrants3,022 — 8,100 757 
Weighted-average shares outstanding assuming dilution76,743 59,146 75,277 59,863 
Basic earnings per share from continuing operations$0.85 $(0.10)$2.75 $0.39 
Diluted earnings per share from continuing operations$0.81 $(0.10)$2.14 $0.38 
Basic weighted average shares outstanding for purposes of basic earnings per share are less than the shares outstanding due to 478,739 shares and 365,100 shares of restricted stock for 2021 and 2020, 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 D), if such warrants have an 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.

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NOTE N—SEGMENT AND REVENUE INFORMATION
The Company operates in 2 reportable segments. The CAM segment consists of the Company's aircraft leasing operations. The ACMI Services segment consists of the Company's airline operations, including CMI agreements as well as ACMI, charter service and passenger service agreements that the Company has with its customers. The Company's aircraft maintenance services, aircraft modification services, ground services and other services, are not large enough to constitute reportable segments and are combined in All other. Intersegment revenues are valued at arms-length market rates.

The Company's segment information from continuing operations is presented below (in thousands):
Three Months EndingNine Months Ending
 September 30,September 30,
 2021202020212020
Total revenues:
CAM$92,931 $76,268 $264,802 $225,301 
ACMI Services330,906 300,189 851,338 871,958 
All other90,292 82,281 281,226 239,373 
Eliminate inter-segment revenues(48,174)(54,592)(145,451)(165,415)
Total$465,955 $404,146 $1,251,915 $1,171,217 
Customer revenues:
CAM$71,070 $51,409 $198,546 $148,104 
ACMI Services330,903 300,189 851,325 871,945 
All other63,982 52,548 202,044 151,168 
Total$465,955 $404,146 $1,251,915 $1,171,217 
ACMI Services revenues are generated from airline service agreements and are usually based on hours flown, the amount of aircraft operated and crew resources provided during a month. ACMI Services revenues are typically recognized over time using the invoice practical expedient as flight operations are performed for the customer. Certain agreements include provisions for incentive payments based upon on-time reliability. These incentives are measured on a monthly basis and recorded to revenue in the corresponding month earned. Under CMI agreements, the Company's airlines have an obligation to provide integrated services including flight crews, aircraft maintenance and insurance for the customer's cargo network. Under ACMI agreements, the Company's airlines are also obligated to provide aircraft. Under CMI and ACMI agreements, customers are generally responsible for aviation fuel, landing fees, navigation fees and certain other flight expenses. When functioning as the customers' agent for arranging such services, the Company records amounts reimbursable from the customer as revenues net of the related expenses as the costs are incurred. Under charter agreements, the Company's airline is obligated to provide full services for one or more flights having specific origins and destinations. Under charter agreements in which the Company's airline is responsible for fuel, airport fees and all flight services, the related costs are recorded in operating expenses. Any sales commissions paid for charter agreements are generally expensed when incurred because the amortization period is less than one year. ACMI Services are invoiced monthly or more frequently. (There are no customer rewards programs associated with services offered by the Company nor does the Company sell passenger tickets or issue freight bills.)
The Company's revenues for customer contracts for airframe maintenance and aircraft modification services that do not have an alternative use and for which the Company has an enforceable right to payment are generally recognized over time based on the percentage of costs completed. Services for airframe maintenance and aircraft modifications typically have project durations lasting a few weeks to a few months. Other revenues for aircraft part sales, component repairs and line service are recognized at a point in time typically when the parts are delivered to the customer and the services are completed. For airframe maintenance, aircraft modifications and aircraft component repairs, contracts include assurance warranties that are not sold separately.
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The Company records revenues and estimated earnings over time for its airframe maintenance and aircraft modification contracts using the costs to costs input method. For such services, the Company estimates the earnings on a contract as the difference between the expected revenue and estimated costs to complete a contract and recognizes revenues and earnings based on the proportion of costs incurred compared to the total estimated costs. Unexpected or abnormal costs that are not reflected in the price of a contract are excluded from calculations of progress toward contract obligations. The Company's estimates consider the timing and extent of the services, including the amount and rates of labor, materials and other resources required to perform the services. These production costs are specifically planned and monitored for regulatory compliance. The expenditure of these costs closely reflect the progress made toward completion of an airframe maintenance and aircraft modification project. The Company recognizes adjustments in estimated earnings on a contract under the cumulative catch-up method in which the impact of the adjustment on estimated earnings of a contract is recognized in the period the adjustment is identified.
The Company's ground services revenues include load transfer and sorting services, facility and equipment maintenance services. These revenues are recognized as the services are performed for the customer over time. Revenues from related facility and equipment maintenance services are recognized over time and at a point in time depending on the nature of the customer contracts.
The Company's external customer revenues from other activities for the three and nine month periods ended September 30, 2021 and 2020 are presented below (in thousands):
Three Months EndedNine Months Ended
September 30,September 30,
2021202020212020
Aircraft maintenance, modifications and part sales$28,513 $26,063 $91,352 $78,749 
Ground services22,928 19,887 75,410 50,498 
Other, including aviation fuel sales12,541 6,598 35,282 21,921 
Total customer revenues for Other Activities$63,982 $52,548 $202,044 $151,168 
CAM's aircraft lease revenues are recognized as operating lease revenues on a straight-line basis over the term of the applicable lease agreements. Customer payments for leased aircraft and equipment are typically paid monthly in advance. CAM's leases do not contain residual guarantees. Approximately 15% of CAM's leases to external customers contain purchase options at projected market values. As of September 30, 2021, minimum future payments from external customers for leased aircraft and equipment were scheduled to be $67.4 million for the remainder of 2021, $240.1 million, $196.1 million, $145.5 million, and $132.4 million, respectively, for each of the next 4 years ending December 31, 2025, and $372.1 million thereafter. As of December 31, 2020, minimum future payments from external customers for leased aircraft and equipment were scheduled to be $222.4 million, $195.5 million, $150.5 million, $99.8 million and $90.7 million, respectively, for each of the next 5 years ending December 31, 2025, and $202.2 million thereafter.
For customers that are not a governmental agency or department, the Company generally receives partial payment in advance of services, otherwise customer balances are typically paid within 30 to 60 days of service. During the three and nine month periods ending September 30, 2021, the Company recognized $1.1 million and $2.9 million of non lease revenue that was reported in deferred revenue at the beginning of the respective periods, respectively, compared to $4.7 million and $2.8 million in the corresponding periods of 2020. Deferred revenue was $2.7 million and $3.0 million at September 30, 2021 and December 31, 2020, respectively, for contracts with customers.
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Segment earnings, as used by the Company's management, includes an allocation of interest expense based on a reportable segments' assets. The Company's other segment information from continuing operations is presented below (in thousands):
Three Months EndingNine Months Ending
 September 30,September 30,
 2021202020212020
Depreciation and amortization expense:
CAM$51,383 $41,421 $148,390 $126,492 
ACMI Services25,649 25,336 73,398 76,032 
All other719 1,217 2,647 3,083 
Total$77,751 $67,974 $224,435 $205,607 
Interest expense
CAM9,408 9,747 28,303 29,709 
ACMI Services4,672 4,803 13,668 15,749 
Government grants recognized
ACMI Service30,322 21,726 96,626 31,547 
Segment earnings (loss):
CAM$28,502 $19,781 $72,518 $55,241 
ACMI Services58,225 40,363 124,246 88,246 
     All other(1,047)(724)2,503 (2,915)
Net unallocated interest expense(371)(797)(1,995)(2,133)
Impairment of aircraft and related assets— — — (39,075)
Net gain (loss) on financial instruments(7,378)(53,393)37,797 (56,072)
Debt issuance costs— — (6,505)— 
Other non-service components of retiree benefit costs, net4,457 2,897 13,370 8,693 
Loss from non-consolidated affiliate(1,147)(2,485)(1,365)(11,762)
Pre-tax earnings from continuing operations$81,241 $5,642 $240,569 $40,223 
The Company's assets are presented below by segment (in thousands). Cash and cash equivalents are reflected in Assets - All other.
September 30,December 31
 20212020
Assets:
CAM$2,238,638 $2,037,628 
ACMI Services814,195 811,516 
All other169,341 152,601 
Total$3,222,174 $3,001,745 
During the first nine months of 2021, the Company had capital expenditures for property and equipment of $69.3 million and $358.1 million for the ACMI Services and CAM, respectively.

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ITEM 2. 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. Air Transport Services Group, Inc. and its subsidiaries may hereinafter individually and collectively be referred to as "the Company", "we", "our", or "us" from time to time. The following discussion and analysis describes the principal factors affecting the results of operations, financial condition, cash flows, liquidity and capital resources. It should be read in conjunction with the accompanying unaudited condensed consolidated financial statements and related notes prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") contained in this report and the audited consolidated financial statements and related notes prepared in accordance with GAAP contained in our Annual Report on Form 10-K for the year ended December 31, 2020.

INTRODUCTION
We lease aircraft and provide airline operations, aircraft modification and maintenance services, ground services, and other support services to the air transportation and logistics 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 three independently certificated airlines (ABX, ATI and OAI) and an aircraft leasing company (CAM).
At September 30, 2021, we owned 104 Boeing aircraft that were in revenue service. At September 30, 2021, CAM also owned fifteen Boeing 767-300 aircraft and one Airbus A321-200 aircraft either already undergoing or awaiting induction into the freighter conversion process. In addition to these aircraft, we leased four freighter aircraft provided by a customer and four passenger aircraft. Our largest customers are the U.S. Department of Defense ("DoD"), Amazon.com Services, LLC ("ASI"), successor to Amazon.com Services, Inc., a subsidiary of Amazon.com, Inc. ("Amazon") and DHL Network Operations (USA), Inc. and its affiliates ("DHL").
COVID-19
The health and safety of our employees is paramount. Our airline operations rely on flight crews, aircraft maintenance technicians, flight support personnel and aircraft loading personnel. We rely on a skilled workforce to perform aircraft maintenance. Similarly, we staff personnel near airports to sort customer packages, load aircraft and maintain related equipment. Maintaining the health of our employees during the COVID-19 pandemic is essential for us to operate safely and maintain our customers' networks. We have taken precautions to prevent, detect and limit the spread of the COVID-19 virus in the workplace. We have added extra precautions and redundancies related to crew reserves, employee travel protocols, sanitation and other measures. We have encouraged our employee to take precautions and have given our employees the opportunity to get vaccinated.
Our passenger flight operations have been and will continue to be impacted by the pandemic primarily as a result of certain international airport closures, flight cancellations and increased expenses. Our airlines have received government funding pursuant to payroll support programs of the federal government as described in Note H of the accompanying financial statements. A vendor that converts our aircraft into freighters informed us that supply chain disruptions have resulted in the delay of various parts and will delay the conversion of aircraft expected to be completed this year by several weeks. The pandemic has not had a significant adverse financial impact on our airline operations for customers' freight networks. We have not experienced a wide-spread outbreak at any of our employee locations.
A COVID-19 outbreak among our flight crews, at one of our maintenance facilities, at a critical vendor, at a customer sorting center, at an aircraft modification facility or at an airport could result in workforce shortages, facility closures, delayed aircraft deployments and additional flight cancellations. Additionally, the threat of COVID-19's continued spread, regulatory requirements and government restrictions could result in critical supply chain disruptions, a reduced workforce, reduced availability of contractors, scarcity of critical parts and delayed deliveries of parts and equipment. In such events, flight delays, additional revenue disruptions and additional costs would result.

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Segments
We have two reportable segments: CAM, which leases Boeing 777, 767, and 757 aircraft and aircraft engines, and ACMI Services, which includes the cargo and passenger transportation operations of the three airlines. Our other business operations, which primarily provide support services to the transportation industry, include providing aircraft maintenance and modification services to customers, load transfer and sorting services as well as related equipment maintenance services. These operations do not constitute reportable segments and are reported together as Other Activities.
DoD
The DoD comprised 26% and 33% of our consolidated revenues during the nine month periods ending September 30, 2021 and 2020, respectively. Our airlines have been providing passenger and cargo airlift services to the U.S. DoD since the mid 1990's. Contracts with the U.S. Transportation Command ("USTC") are typically for a one-year period, however, the current passenger international charter contract has a two-year term with option periods, at the election of the DoD, through September 2024 and the contract with ATI to provide combi aircraft operations runs through December 2021. The decline in the percentage of revenues from the DoD primarily reflects the negative impact of the COVID-19 pandemic on our passenger flight operations and increased revenues from aircraft leases to other customers, including Amazon.
Amazon
Revenues from our commercial arrangements with ASI comprised approximately 35% and 29% of our consolidated revenues during the nine month periods ending September 30, 2021 and 2020, respectively. On March 8, 2016, we entered into an Air Transportation Services Agreement (as amended, the “ATSA”) with ASI pursuant to which we lease Boeing 767 freighter aircraft to ASI, operate the aircraft via our airline subsidiaries, perform maintenance services and provide ground handling services through our subsidiary, LGSTX. Under the ATSA, we operate 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. The operating term of the ATSA runs through March of 2026 and is thereafter subject to renewal provisions.
The table below summarizes aircraft lease placements and commitments with Amazon as of September 30, 2021.
AmazonYear of
# of LeasesCommencementExpiration
Leased
Boeing 767-2001220162023
Boeing 767-300220162026
Boeing 767-300620172027
Boeing 767-300620192029
Boeing 767-300520202030
Boeing 767-300820212031
Lease Commitments
Boeing 767-300320212031

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In conjunction with the execution of the ATSA and its amendments, the Company and Amazon entered into an Investment Agreement (the 2016 Investment Agreement) and a Stockholders Agreement on March 8, 2016 and a second Investment Agreement on December 20, 2018 (the 2018 Investment Agreement). Pursuant to these Investment Agreements, the Company issued warrants to Amazon in conjunction with aircraft leases. Our accounting for the warrants issued to Amazon has been determined in accordance with the financial reporting guidance 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 Company's earnings are impacted by the fair value re-measurement of the Amazon warrants classified in liabilities at the end of each reporting period, customer incentive amortization and the related income tax effects. For income tax calculations, the value and timing of related tax deductions will differ from the guidance described below for financial reporting.
For additional information about the Amazon warrants, see Note C to the accompanying financial statements in this report.
DHL
DHL accounted for 13% and 12% of the Company's consolidated revenues, excluding directly reimbursed revenues, during the nine month periods ending September 30, 2021 and 2020, respectively. Under a CMI agreement with DHL, ABX operates and maintains aircraft 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 aircraft leased to DHL that it operates. As of September 30, 2021, CAM leased 12 Boeing 767 aircraft to DHL comprised of four Boeing 767-200 aircraft and eight Boeing 767-300 aircraft, expiring between 2022 and 2028. Eight of the 12 Boeing 767 aircraft were being operated by our airlines for DHL. We also operated four CAM-owned Boeing 757 aircraft under other operating arrangements with DHL during the first half of 2020. DHL terminated operating agreements for three of the Boeing 757 aircraft in mid 2020 and the last one during the first quarter of 2021.
In May 2021, CAM reached an agreement with DHL to lease four more Boeing 767-300 converted freighter to DHL, each for a term of seven years. One of these leases began in the third quarter of 2021. The remaining three aircraft leases are expected to begin in 2022.

RESULTS OF OPERATIONS
Summary
External customer revenues from continuing operations increased by $61.8 million, or 15%, to $466.0 million and $80.7 million, or 7%, to $1,251.9 million for the three and nine month periods ended September 30, 2021 compared to the corresponding periods of 2020. Customer revenues increased in 2021 for aircraft leasing and flying for our customers' package delivery networks, and passenger revenues increased during the third quarter of 2021 compared to the previous year period. Passenger revenues for the first nine months of 2021 were negatively impacted by the COVID-19 pandemic more so than the revenues for the first nine months of 2020.
Consolidated net earnings from continuing operations were $62.4 million and $184.5 million for the three and nine month periods ending September 30, 2021, respectively, compared to net losses of $5.7 million and net earnings of $22.8 million for the corresponding periods of 2020. The pre-tax earnings from continuing operations were $81.2 million and $240.6 million for the three and nine month periods ending September 30, 2021, respectively, compared to pre-tax earnings of $5.6 million and $40.2 million for the corresponding periods of 2020. Earnings were affected by the following specific events or adjustments that do not directly reflect our underlying operations among the periods presented.
Pre-tax earnings included losses of $7.4 million and gains of $37.8 million for the three and nine month periods ended September 30, 2021, respectively, for the re-measurement of financial instruments, including warrant obligations granted to Amazon. This compares to pre-tax losses for re-measurement of financial instruments of $53.4 million and $56.1 million for the corresponding periods of 2020.
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Pre-tax earnings were reduced by $5.8 million and $17.3 million for the three and nine month periods ended September 30, 2021, respectively, for the amortization of customer incentives given to ASI in the form of warrants, compared to $5.3 million and $15.0 million for the corresponding periods of 2020.
Pre-tax earnings from continuing operations included gains of $4.5 million and $13.4 million for the three and nine month periods ended September 30, 2021, respectively, for the non-service components of retiree benefit plans compared to gains of $2.9 million and $8.7 million for the corresponding periods of 2020.
Pre-tax earnings for the three and nine month periods ended September 30, 2021, included losses of $1.1 million and $1.4 million, respectively, for the Company's share of development costs for a joint venture and the partial sale of an airline investment, compared to losses of $2.5 million and $11.8 million for the corresponding periods of 2020.
Pre-tax earnings for the nine month period ended September 30, 2020, included an impairment of $39.1 million for our four Boeing 757 freighter aircraft and related assets.
Pre-tax earnings for the nine month period ended September 30, 2021, included a charge of $6.5 million to write-off debt issuance costs in conjunction with the repayment of term loans.
During the three and nine month periods ended September 30, 2021, the Company recognized $30.3 million and $96.6 million, respectively, of government grants from payroll support program agreements during the pandemic compared to $21.7 million and $31.5 million for the corresponding periods of 2020.
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 $60.8 million and $117.9 million for the three and nine month periods ended September 30, 2021, respectively, compared to $42.2 million and $121.9 million for the corresponding periods of 2020. Adjusted pre-tax earnings from continuing operations, which excludes the recognition of COVID-19 related government grants, increased by $18.6 million and decreased by $4.0 million for the three and nine month periods ended September 30, 2021 compared to the corresponding periods of 2020. Improved earnings during the third quarter of 2021 reflect additional aircraft leases, increased operations for customer delivery networks and increased block hours for passenger operations driven primarily by Afghanistan evacuation flights. Lower earnings for the first nine months of the year, primarily reflect the lower level of passenger operations during the first six months of 2021 compared to the corresponding period of 2020. During 2020, the DoD and other government agencies contracted for special airlift capacity and missions which did not reoccur at the same levels during the first six months of 2021.
Pre-tax segment earnings for CAM increased $8.7 million and $17.3 million for the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020, driven by 13 more aircraft under lease to external customers since October 1, 2020. Pre-tax segment earnings for ACMI Services, which includes government grants, increased $17.9 million and $36.0 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020, as reduced passenger flying due to COVD-19 was offset by the recognition of additional pandemic-related government grants and additional revenues for customer delivery networks.

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A summary of our revenues and pre-tax earnings and adjusted pre-tax earnings from continuing operations is shown below (in thousands):
Three Months EndingNine Months Ending
 September 30,September 30,
 2021202020212020
Revenues from Continuing Operations:
CAM
Aircraft leasing and related services$97,960 $80,976 $279,813 $238,930 
Lease incentive amortization(5,029)(4,708)(15,011)(13,629)
Total CAM92,931 76,268 264,802 225,301 
ACMI Services330,906 300,189 851,338 871,958 
Other Activities90,292 82,281 281,226 239,373 
Total Revenues514,129 458,738 1,397,366 1,336,632 
Eliminate internal revenues(48,174)(54,592)(145,451)(165,415)
Customer Revenues$465,955 $404,146 $1,251,915 $1,171,217 
Pre-Tax Earnings (Loss) from Continuing Operations:
CAM, inclusive of interest expense$28,502 $19,781 $72,518 $55,241 
ACMI Services, inclusive of government grants and interest expense58,225 40,363 124,246 88,246 
Other Activities(1,047)(724)2,503 (2,915)
Net unallocated interest expense(371)(797)(1,995)(2,133)
Impairment of aircraft and related assets— — — (39,075)
Net financial instrument re-measurement (loss) gain(7,378)(53,393)37,797 (56,072)
Debt issuance costs— — (6,505)— 
Other non-service components of retiree benefits gains, net4,457 2,897 13,370 8,693 
Loss from non-consolidated affiliate(1,147)(2,485)(1,365)(11,762)
Pre-Tax Earnings (Loss) from Continuing Operations81,241 5,642 240,569 40,223 
Add other non-service components of retiree benefit (gains) costs, net(4,457)(2,897)(13,370)(8,693)
Remove government grants(30,322)(21,726)(96,626)(31,547)
Add impairment of aircraft and related assets— — — 39,075 
Add loss for non-consolidated affiliates1,147 2,485 1,365 11,762 
Add debt issuance costs— — 6,505 — 
Add customer incentive amortization5,798 5,291 17,295 15,044 
Remove (gain) add net loss on financial instruments7,378 53,393 (37,797)56,072 
Adjusted Pre-Tax Earnings from Continuing Operations (Non-GAAP)$60,785 $42,188 $117,941 $121,936 

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Adjusted pre-tax earnings from continuing operations, a non-GAAP measure, is pre-tax earnings excluding the following: (i) settlement charges and other non-service components of retiree benefit costs; (ii) gains and losses for the fair value re-measurement of financial instruments; (iii) customer incentive amortization; (iv) the start-up costs of a non-consolidated joint venture; (v) the charge off of debt issuance costs; and (vi) the sale of an airline investment. 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. In addition, we also exclude the recognition of government grants from adjusted pre-tax earnings to highlight the varying impact of the grants on our operating results. Management uses adjusted pre-tax earnings to compare the performance of core operating results between periods. Presenting this measure provides investors 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.
Aircraft Fleet Summary
Our fleet of cargo and passenger aircraft is summarized in the following table as of September 30, 2021 and December 31, 2020. 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 September 30, 2021, the Company owned fifteen Boeing 767-300 aircraft that were either already undergoing or awaiting induction into the freighter conversion process.
Aircraft fleet activity during the first nine months of 2021 is summarized below:
CAM completed the modification of seven Boeing 767-300 freighter aircraft purchased in the previous year and began to lease all seven of these aircraft to external customers under multi-year leases. ATI operates five of these aircraft for a customer.
OAI returned one Boeing 767-300 passenger aircraft to CAM. CAM converted this passenger aircraft into a standard freighter configuration. This aircraft was leased to an external customer under a multi-year lease.
ATI returned three Boeing 767-300 freighter aircraft to CAM. CAM leased all three of these aircraft to an external customer under a multi-year lease. ATI operates these aircraft for the customer.
External customers returned five Boeing 767-200 freighter aircraft to CAM. Three of these aircraft were leased to other external customers under multi-year leases. One of the aircraft is being prepped for lease to another external customer later in 2021.
CAM purchased fourteen Boeing 767-300 passenger aircraft for the purpose of converting the passenger aircraft into a standard freighter configuration. These aircraft are expected to be leased to external customers during 2021 and 2022.
CAM purchased one Airbus A321-200 passenger aircraft for the purpose of converting the passenger aircraft into a standard freighter configuration. This aircraft is expected to be leased to an external customer during 2022.
ATI returned the last Boeing 757-200 freighter aircraft to CAM and the aircraft was retired.
ATI began to operate a customer provided Boeing 767-300 freighter aircraft and ABX began to operate a customer provided Boeing 767-200 freighter aircraft.
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September 30, 2021December 31, 2020
 ACMI
Services
CAMTotalACMI
Services
CAMTotal
In-service aircraft
Aircraft owned
Boeing 767-200 Freighter26 31 28 33 
Boeing 767-200 Passenger— — 
Boeing 767-300 Freighter56 58 45 50 
Boeing 767-300 Passenger— — 
Boeing 777-200 Passenger— — 
Boeing 757-200 Freighter— — — — 
Boeing 757-200 Combi— — 
Total22821042773100
Operating lease
Boeing 767-200 Passenger— — 
Boeing 767-300 Passenger— — 
Boeing 767-200 Freighter— — — — 
Boeing 767-300 Freighter— — 
Total— — 
Other aircraft
Owned Boeing 767-300 under modification— 15 15 — 
Owned Airbus A321-200 under modification— — — — 
Owned Boeing 767 available or staging for lease— — — — 
As of September 30, 2021, ABX, ATI and OAI were leasing 22 in-service aircraft internally from CAM for use in ACMI Services. Of CAM's 26 externally leased Boeing 767-200 freighter aircraft, 12 were leased to ASI and operated by ABX or ATI, one was leased to DHL and operated by ABX, three were leased to DHL and were being operated by a DHL-affiliated airline and ten were leased to other external customers. Of the 56 externally leased Boeing 767-300 freighter aircraft, 27 were leased to ASI and operated by ABX or ATI, seven were leased to DHL and operated by ABX, one was leased to DHL and is being operated by a DHL-affiliated airline and 21 were leased to other external customers. The carrying values of the total in-service fleet as of September 30, 2021 and December 31, 2020 were $1,641.8 million and $1,535.3 million, respectively.
CAM Segment
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 ten years.
As of September 30, 2021 and 2020, CAM had 82 and 69 aircraft under lease to external customers, respectively. CAM's revenues grew by $16.7 million and $39.5 million for the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020, primarily as a result of additional aircraft leases. Revenues from external customers totaled $71.1 million and $198.5 million for the three and nine month periods ended September 30, 2021, respectively, compared to $51.4 million and $148.1 million for the corresponding periods of 2020. CAM's revenues from the Company's airlines totaled $21.9 million and $66.3 million for the three and nine month periods ended September 30, 2021, respectively, compared to $24.9 million and $77.2 million for the corresponding periods of 2020. CAM's aircraft leasing and related services revenues, which exclude customer lease incentive amortization, increased $17.0 million and $40.9 million for the three and nine month periods ended September 30, 2021 compared to the corresponding periods of 2020, primarily as a result of
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new aircraft leases in 2021. Since October 1, 2020, CAM has added eleven Boeing 767-300 aircraft to its portfolio and placed all eleven Boeing 767-300 aircraft with external customers under long-term leases.
CAM's pre-tax segment earnings, inclusive of internally allocated interest expense, were $28.5 million and $72.5 million for the three and nine month periods ended September 30, 2021, respectively, compared to $19.8 million and $55.2 million for the corresponding periods of 2020. Increased pre-tax earnings reflect the eleven aircraft placed into service since October 1, 2020. The pre-tax earnings are inclusive of increased depreciation expense of $10.0 million and $21.9 million for the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020 driven by the addition of seven additional Boeing aircraft in the first nine months of 2021 compared to the first nine months of 2020.
In addition to the fifteen Boeing 767-300 aircraft and one Airbus A321-200 aircraft which were in the freighter modification process at September 30, 2021, CAM also has agreements to purchase twelve more Boeing 767-300 aircraft and two more Airbus A321-200 aircraft and expects to complete their modification from a passenger to freighter configuration. We expect to place at least four more B767-300 freighters under long-term leases in the fourth quarter of 2021, bringing the planned total number of leased B767-300 freighters for 2021 to fifteen, comprised of eleven newly modified Boeing 767-300 freighters and four re-deployed Boeing 767-300 freighters, including eleven to Amazon and four to other external customers. CAM has also secured access to 70 additional modification slots with conversion vendors. 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. CAM's future operating results will also depend on the timing and lease rates under which aircraft are redeployed when leases expire. CAM's future operating results will also be impacted by the additional amortization of warrant incentives as incremental long-term aircraft leases to ASI commence.
ACMI Services
The ACMI Services segment provides airline operations to its customers, typically under contracts providing for a combination of aircraft, crews, maintenance, insurance and aviation fuel. Our customers are typically 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 DoD, usually require the airline to provide full service, including fuel and other operating expenses for a fixed, all-inclusive price.
Total revenues from ACMI Services increased $30.7 million and decreased $20.6 million during the three and nine month periods ended September 30, 2021, respectively, to $330.9 million and $851.3 million compared to the corresponding periods of 2020. Combined revenues from contracted passenger and combi flights increased sharply during the third quarter of 2021, driven by Afghanistan evacuation missions for the U.S government. Combined block hours flown for all passenger flights, including contracted commercial passenger and combi flights, for the three and nine month periods ending September 30, 2021, increased 8% and decreased 16%, respectively, compared to the corresponding periods of 2020. Revenues for the first nine months of 2021 were impacted by the COVID-19 pandemic more so than the revenues for the first nine months of 2020. During 2020, the DoD and other government agencies contracted for special airlift capacity and missions which did not occur at the same levels during 2021.
Overall billable block hours increased 17% and 10% for the three and nine month periods ending September 30, 2021, respectively, compared to the corresponding periods of 2020 and reflect more freighter aircraft added since September 30, 2020. During the first nine months of 2021, we began to operate eight more CAM-owned Boeing 767-300 aircraft under the Amazon ATSA, one more customer provided Boeing 767-300 aircraft and one customer provided Boeing 767-200 aircraft. As of September 30, 2021, ACMI Services included 77 in-service aircraft compared to 71 as of September 30, 2020.
ACMI Services had pre-tax segment earnings of $58.2 million and $124.2 million during the three and nine month periods ended September 30, 2021, respectively, compared to $40.4 million and $88.2 million for the corresponding periods of 2020 inclusive of internally allocated interest expense and the recognition of pandemic-related government grants of $30.3 million and $96.6 million in the three and nine months periods ended September 30, 2021 and $21.7 million and $31.5 million in the corresponding periods of 2020. Internally allocated interest expense decreased by $0.1 million and $2.1 million for the three and nine month periods ended September 30, 2021, to $4.7 million and $13.7 million, respectively, compared to the corresponding periods in 2020. In addition to the increase in government grants recognized, ACMI Services earnings increased during the third quarter of 2021 compared to the corresponding period of 2020 due primarily to increased revenues for customer delivery networks.
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Earnings for the first nine months of 2021 were negatively impacted by lower DoD flying during the first six months of 2021 compared to 2020.
Due to the wind-down of Afghanistan-related evacuation operations, the level of passenger operations for the remainder of 2021 is expected to decline from third quarter 2021 levels. While difficult to predict, we expect revenues from passenger operations for the fourth quarter of 2021 to be similar to the level of fourth quarter 2020 passenger operations. We expect Amazon to lease at least three more Boeing 767-300 freighter aircraft from CAM during the last quarter of 2021 and contract the operation of those aircraft through our existing ATSA. We also expect Amazon to contract with us to operate one more Amazon-provided aircraft under the ATSA during the fourth quarter of 2021.
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 our FAA certificated maintenance and repair subsidiaries, we sell aircraft parts and provide aircraft maintenance and modification services. We also arrange and perform logistical services and package sorting services for certain ASI gateway locations in the U.S. We provide maintenance for ground equipment, facilities and material handling equipment and we resell aviation fuel in Wilmington, Ohio. Additionally, we provide flight training services. Other activities include the cost of unallocated corporate expenses.
External customer revenues from all other activities increased $11.4 million and $50.9 million for the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. Broad revenue increases during the first nine months of 2021 were led by ground services revenues which increased over 49% compared to the previous year period. The pre-tax earnings from other activities increased $5.4 million during the nine month period ended September 30, 2021, to $2.5 million, compared to the corresponding period of 2020 as a result of higher revenues.
Expenses from Continuing Operations
Salaries, wages and benefits expense increased $19.5 million, or 15%, and $58.0 million, or 16%, during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020, driven by higher employee headcount for flight operations, maintenance operations and package sorting services along with increased healthcare benefit costs. The total headcount increased 4% as of September 30, 2021, compared to September 30, 2020, including additional personnel for the two USPS mail contracts added since last year. Additionally, increases since July 1, 2020, include more flight crewmembers, aircraft maintenance technicians and other personnel to support additional flight operations for our customers' express cargo networks, primarily ASI. Salaries expense also increased due to an amended collective bargaining agreement with the union for ABX's pilot employees, which went into effect at the beginning of 2021.
Depreciation and amortization expense increased $9.8 million and $18.8 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. The increase reflects incremental depreciation for eleven Boeing 767-300 aircraft and additional aircraft engines added to the operating fleet since October 1, 2020, as well as capitalized heavy maintenance and navigation technology upgrades. This increase in depreciation was offset by the retirement of the Boeing 757 freighter fleet and lower depreciation expense on passenger aircraft engines due to reduced activity compared to the previous year. We expect depreciation expense to increase during future periods in conjunction with our fleet expansion and capital spending plans.
Maintenance, materials and repairs expense decreased $5.0 million and $2.5 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. Decreased maintenance expense for the first nine months of 2021 was driven by lower costs for engine repairs at our airlines offset by increased flight operations for our customers' express cargo networks and increased heavy maintenance. The aircraft maintenance and material expenses can vary among periods due to the number of maintenance events and the scope of airframe checks that are performed.
Fuel expense increased by $14.0 million and $0.4 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. Fuel expense includes the cost of fuel to operate DoD charters, fuel used to position aircraft for service and for maintenance purposes, as well as the
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cost of fuel sales. Fuel expense increased during the first nine months of 2021 compared to 2020 primarily due to the additional block hours operated by our airlines and increases in the price per gallon of aviation fuel compared to the previous year periods.
Contracted ground and aviation services expense includes navigational services, aircraft and cargo handling services, baggage handling services and other airport services. Contracted ground and aviation services increased $1.8 million and $7.5 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. The increases were driven by additional ground equipment installation projects for customers and higher fees for airport services compared to the previous year periods.
Travel expense increased by $4.7 million and $2.6 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. The increase in travel expense during the first nine months of 2021 reflects an increase in employee travel to support higher block hours flown for customers, which increased 10% compared to 2020.
Landing and ramp expense, which includes the cost of deicing chemicals, increased by $0.6 million and $1.3 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020, driven by increased block hours for our customers' express cargo networks.
Rent expense increased by $0.7 million and $3.6 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020 due to the lease of an additional passenger aircraft and facility rents for the two USPS facilities started in mid 2020.
Insurance expense increased by $0.1 million and $2.1 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. Aircraft fleet insurance has increased due to additional aircraft operations and higher insurance rates during the first nine months of 2021 compared to 2020.
Other operating expenses decreased by $1.4 million and $1.2 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. Other operating expenses include professional fees, employee training, utilities, commission expense to our CRAF team for DoD revenues and other expenses.
Operating results included a pre-tax expense credit of $30.3 million and $96.6 million during the three and nine month periods ended September 30, 2021, respectively, compared to $21.7 million and $31.5 million during the corresponding periods of 2020, to recognize grants received from the U.S. government for payroll support programs. For additional information about the government grants, see Note H of the accompanying financial statements.
Non Operating Income, Adjustments and Expenses
Interest expense decreased by $1.0 million and $3.8 million during the three and nine month periods ended September 30, 2021, respectively, compared to the corresponding periods of 2020. Interest expense during the first nine months of 2021 decreased compared to 2020 due to lower interest rates on our borrowings under the Senior Credit Agreement and lower average debt balances outstanding during the year. During the second quarter of 2021, the Company recorded a pre-tax charge of $6.5 million to write-off the unamortized debt issuance costs of the Company's term loans which were repaid in full during April 2021.
The Company recorded unrealized pre-tax losses on financial instrument re-measurements of $7.4 million and gains of $37.8 million during the three and nine month periods ended September 30, 2021, respectively, compared to pre-tax losses of $53.4 million and $56.1 million for the corresponding periods of 2020. The gains and losses include the results of re-valuing, as of September 30, 2021 and 2020, the fair value of the stock warrants granted to Amazon. Generally, the warrant value increases or decreases with corresponding increases or decreases in the ATSG share price during the measurement period. Warrant gains for the first nine months of 2021 reflect an 18% decrease in the traded price of ATSG shares.
Non-service components of retiree benefits were a net gain of $4.5 million and $13.4 million for the three and nine month periods ended September 30, 2021, respectively, compared to $2.9 million and $8.7 million for the corresponding periods of 2020. The non-service component gain and losses of retiree benefits are actuarially determined and include the amortization of unrecognized gains and losses stemming from changes in assumptions regarding discount rates, expected investment returns and other retirement plan assumptions. Non-service
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components of retiree benefits can vary significantly from one year to the next based on investment results and changes in discount rates used to account for defined benefit retirement plans.
The provision for income taxes for interim periods is based on management's best estimate of the effective income tax rate expected to be applicable for the current year, plus any adjustments arising from changes in the estimated amount of taxable income related to prior periods. Income taxes recorded through September 30, 2021 have been estimated utilizing a 23% rate based upon year-to-date income and projected results for the full year. The recognition of discrete tax items, such as the conversion of employee stock awards, officer's compensation, the issuance of stock warrants and other items have an impact on the effective rate during a period.
The effective tax rate from continuing operations for both the three and nine month periods ended September 30, 2021 was 23%. The effective tax rate is affected by changes in valuation allowances and other discrete tax items in which expenses and benefits for tax purposes are different than required by generally accepted accounting principles. The effective tax rate before including the effects of the warrant re-measurements, incentive amortizations and the other adjustments for adjusted pre-tax earnings from continuing operations was 24% for both the three and nine month periods ended September 30, 2021. The effective tax rate before including the effects of the warrants was 25% and 23% for the three and nine month periods ended September 30, 2020, respectively.
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 pursuant to which ABX performed package sorting services for DHL. Pre-tax gains related to the former sorting operations were $3.1 million for the first nine months of 2021 compared to $5.4 million for 2020. Pre-tax earnings during 2021 and 2020 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 $429.2 million and $423.3 million for the first nine months in 2021 and 2020, respectively. Cash receipts from the U.S. government for COVID-19 payroll support programs were $83.0 million and $75.4 million for the first nine month of 2021 and 2020 respectively (see Note H to the accompanying financial statements). Cash outlays for pension contributions were $1.8 million and $8.2 million for the first nine months of 2021 and 2020, 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 $428.1 million and $394.3 million for the first nine months of 2021 and 2020, respectively. Capital expenditures in the first nine months of 2021 included $278.5 million for the acquisition of 14 Boeing 767-300 aircraft, one Airbus A321-200 aircraft and freighter modification costs; $140.9 million for required heavy maintenance; and $8.7 million for other equipment. Capital expenditures in the first nine months of 2020 included $273.4 million for the acquisition of eight Boeing 767-300 aircraft and freighter modification costs; $65.3 million for required heavy maintenance; and $55.6 million for other equipment, including the purchases of aircraft engines and rotables. We estimate that capital expenditures for 2021 will total at least $530 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.
During the first nine months of 2021 and 2020, we contributed $2.5 million and $9.1 million, respectively, to 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 $7.6 million during the first nine months of 2021 compared to $14.3 million used in financing activities in 2020. Financing activities include $132 million remitted by Amazon on May 7, 2021 to exercise warrants for the Company's common stock, as described in Note C of the accompanying financial statements. During the first nine months in 2021, we made debt principal payments of $1,758.0 million which included payments of $619.1 million to repay the entire balance of all term loans and payments of $1,138.9 million to the revolving credit facility. Our financing activities during the first nine months in 2020 included a debt
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offering of a $200 million add-on to our senior unsecured notes. During the first nine months in 2021, we drew $1,430.6 million from the revolving credit facility. The proceeds from the senior notes add-on, the funds received from Amazon and draws on the revolving credit facility resulted in the retirement of the term loans and a larger outstanding balance under the revolving credit agreement. During the first nine months in 2020, we drew $80.0 million from the revolving credit facility. Our financing activities during the first nine months in 2020 included a debt offering of $500 million in senior unsecured notes which was used to pay down the revolving credit facility in 2020. Our borrowing activities were necessary to purchase and modify aircraft for deployment into air cargo markets.
Commitments
The Company outsources a significant portion of the aircraft freighter modification process to third parties. The modification primarily consists of the installation of a standard cargo door and loading system. As of September 30, 2021, the Company had sixteen aircraft that were in or awaiting the modification process. We have agreements to purchase twelve more Boeing 767-300 passenger aircraft and two Airbus 321-200 passenger aircraft. We have contracted with third parties for future modifications of Boeing 767-300, Airbus A321 and Airbus A330 passenger aircraft. We expect to finance the capital expenditures from current cash balances, future operating cash flows and the Senior Credit Agreement. For additional information about the Company's aircraft modification obligations, see Note H of the accompanying financial statements in this report.
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. Approval of a supplemental type certificate from the FAA was granted in April 2021 and aircraft conversions have begun. We expect to make contributions to the joint-venture, equal to the Company's 49% ownership percentage, as may be needed for inventory and other working capital needs during 2021.
Liquidity
At September 30, 2021, the Company had $49.8 million of cash balances. We believe that the Company's current cash balances and forecasted cash flows provided from its customer leases, operating agreements and government grants 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.
The Company has a Senior Credit Agreement with a consortium of banks. Borrowings under the Senior Credit Agreement are collateralized by certain Company-owned aircraft. The Company has also issued unsecured Senior Notes in unregistered offerings pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended. The Senior Credit Agreement and Senior Notes are described in Note F of the accompanying financial statements. In April and May 2021, we made changes to the Company's debt structure which resulted in the extension of repayment maturities, a reduction in collateralized borrowings outstanding, an increase to fixed rate debt, and increased borrowing capacity subject to certain conditions.
The Senior Credit Agreement was amended on April 6, 2021 ("Amended Credit Agreement"), to temporarily increase the maximum amount of the Company's revolving credit facility from $600 million to $1 billion and, thereafter, reduce the maximum amount on April 13, 2021, to $800 million. In addition, the amendment modified the maturity date of the agreement from November 30, 2024, to April 6, 2026, and effected other changes as described in Note F of the accompanying financial statements. In conjunction with the amendment, we prepaid the entire outstanding balance of all term loans at the time of the amendment.
On January 8, 2020, the Company, through a subsidiary, issued $500 million of Senior Notes. The Senior Notes are senior unsecured obligations that bear interest at a rate of 4.75% per year, and mature on February 1, 2028. On April 13, 2021, the Company, through a subsidiary, completed an offering of $200 million of additional Senior Notes ("Additional Notes"). The Additional Notes are fully fungible with the previously-issued Senior Notes, treated as a single class for all purposes under the indenture governing the Senior Notes with the same terms as those of the previously-issued Senior Notes (other than issue date and issue price) and mature on February 1, 2028.
The Senior Credit Agreement is collateralized by our fleet of Boeing 777, 767 and 757 freighter aircraft. Under the terms of the Senior Credit Agreement, we are required to maintain collateral coverage equal to 125% of the outstanding balances of the term loans and the total funded revolving credit facility. The minimum collateral coverage which must be maintained is 50% of the outstanding balance of the term loan plus the revolving credit
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facility commitment. As mentioned above, in conjunction with the amendment to the Senior Credit Agreement done on April 6, 2021, the Company paid off the entire outstanding balance of all term loans.
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 (earnings before interest, taxes, depreciation and amortization expenses) 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. The Senior Notes contain customary events of default and covenants which are generally no more restrictive than those set forth in the Senior Credit Agreement.
As of September 30, 2021, the unused revolving credit facility totaled $353.3 million and additional permitted indebtedness under the Senior Credit Agreement, subject to compliance with other covenants, was limited to $250.0 million. 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. At the Company's current debt-to-EBITDA ratio, the Senior Notes bear a fixed interest rate of 4.75% and the revolving credit facility bears a variable interest rate of 1.09%.
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 September 30, 2021 and 2020, 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. 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.
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 the Condensed Consolidated Financial Statements included in Part I, Item 1 of this Form 10-Q.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
The Company is exposed to market risk for changes in interest rates and 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.
No changes have occurred to the market risks the Company faces since information about those risks was disclosed in item 7A of the Company's 2020 Annual Report on form 10-K filed with the Securities and Exchange Commission on March 1, 2021.

ITEM 4. CONTROLS AND PROCEDURES
(a) Evaluation of Disclosure Controls and Procedures
As of September 30, 2021, 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 year that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS
We are currently a party to legal proceedings 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 1A. RISK FACTORS
The Company faces risks that could adversely affect its condition or results of operations. Many of these risks are disclosed in Item 1A of the Company's 2020 Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 1, 2021. Other risks that are currently unknown to management or are currently considered immaterial or unlikely, could also adversely affect the Company.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
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 (less amounts previously repurchased). 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 third quarter of 2021. As of September 30, 2021, the Company had repurchased 6,592,349 shares and the maximum dollar value of shares that could then be purchased under the program was $61.3 million.
The share repurchase program has been suspended until the CARES Act, PSP Extension Law, and American Act restrictions on the repurchase of shares have lapsed. For more information, see Note H of the accompanying consolidated financial statements in this report.
On March 5, 2021, Amazon exercised warrants for 865,548 shares of the Company's common stock through a cashless exercise by forfeiting 480,047 warrants from the 2016 Investment Agreement as payment. For the cashless exchange, ATSG shares were valued at $27.27 per share, its volume-weighted average price for the previous 30 trading days immediately preceding March 5, 2021. Also on March 5, 2021, Amazon notified the Company of its intent to exercise warrants from the 2016 Investment agreement for 13,562,897 shares of the Company's common stock by paying $132.0 million of cash to the Company. This exercise was contingent upon the approval of the United States Department of Transportation, and the expiration or termination of any applicable waiting period pursuant to the Hart-Scott-Rodino Antitrust Improvements Act of 1976. After receiving all required regulatory approvals and clearances, Amazon remitted the funds to the Company on May 7, 2021 and the Company issued the corresponding shares of common stock, completing the warrant exercise. These funds were used to pay down the balance of the Company's revolving credit facility. The shares were issued to Amazon without registration under the Securities Act of 1933, as amended (the “1933 Act”), pursuant to exemptions from registration under Section 4(2) of the 1933 Act and Regulation D promulgated by the Securities and Exchange Commission under the 1933 Act.

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ITEM 6. EXHIBITS
The following exhibits are filed with or incorporated by reference into this report.

Exhibit No.Description of Exhibit
Instruments defining the rights of security holders
4.1
Material Contracts
10.1
10.2
10.3
Certifications
31.1
31.2
32.1
32.2
101.INSInline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)
101.SCHInline XBRL Taxonomy Extension Schema Document
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document
101.LABInline XBRL Taxonomy Extension Labels Linkbase Document
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document
104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).
____________________
(1)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on April 6, 2021.
(2)Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on April 13, 2021.
(3)Incorporated by reference to the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 10, 2021.
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SIGNATURES
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.
AIR TRANSPORT SERVICES GROUP, INC.,
a Delaware Corporation
Registrant
/S/  RICHARD F. CORRADO
Richard F. Corrado
Chief Executive Officer (Principal Executive Officer)
Date:November 8, 2021
/S/  QUINT O. TURNER
Quint O. Turner
Chief Financial Officer (Principal Financial Officer
Date:November 8, 2021and Principal Accounting Officer)
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