UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 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: 001-39897 ROTOR ACQUISITION CORP. (Exact Name of Registrant as Specified in Its Charter) Delaware 85-2838301 (State or other jurisdiction of incorporation ...