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X UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30 , 2021 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Wisconsin ( State or other jurisdiction of incorporation or organization ) or 1917 Four Wheel Drive Oshkosh , Wisconsin ( Address of principal executive offices ) Title of each class Common Stock $ 0.01 par value Oshkosh Corporation ( Exact name of registrant as specified in its charter ) Commission file number : 1-31371 39-0520270 ( I.R.S. Employer Identification No. ) 54902 ( Zip Code ) Registrant's telephone number , including area code : ( 920 ) 502-3400 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) OSK Name of each exchange on which registered New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No 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 . 0 No Yes Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . No