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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , DC 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-16545 ATLAS AIR Delaware ( State or other jurisdiction of incorporation or organization ) 2000 Westchester Avenue , Purchase , New York ( Address of principal executive offices ) WORLDWIDE Atlas Air Worldwide Holdings , Inc. ( Exact name of registrant as specified in its charter ) Registrant's telephone number , including area code : ( 914 ) 701-8000 13-4146982 ( IRS Employer Identification No. ) 10577 ( Zip Code ) SECURITIES REGISTERED PURSUANT TO SECTION 12 ( b ) OF THE ACT : Title of each class Trading Symbol ( s ) Name of each exchange on which registered The NASDAQ Global Select Market Common Stock , $ 0.01 Par Value AAWW SECURITIES REGISTERED PURSUANT TO SECTION 12 ( g ) OF THE ACT : None No Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit ) . 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 definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer > Accelerated filer Non - accelerated filer Smaller reporting company Emerging growth company If emerging company , indicate check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report > Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . □ Yes > No The aggregate market value of the registrant's Common Stock held by non - affiliates based upon the closing price of Common Stock as reported on The NASDAQ Global Select Market as of June 30 , 2020 was approximately $ 810.9 million . As of February 12 , 2021 , there were 28,797,747 shares of the registrant's Common Stock outstanding . 1 DOCUMENTS INCORPORATED BY REFERENCE : Certain portions of the registrant's Proxy Statement relating to the 2021 Annual Meeting of Stockholders , to be filed with the Securities and Exchange Commission , are incorporated by reference into Part III .