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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ( Mark One ) XANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 FORM 10 - K TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Cayman Islands ( State or Other Jurisdiction of Incorporation or Organization ) Yes No OR 5100 W. 115th Place Leawood , KS ( Address of Principal Executive Offices ) Commission File Number 001-39508 Tortoise Acquisition Corp. II ( Exact Name of Registrant as Specified in its Charter ) to Title of each class Units , each consisting of one Class A ordinary share and one - fourth of one redeemable warrant Class A ordinary shares , par value $ 0.0001 per share Warrants , each whole warrant exercisable for one Class A ordinary share at an exercise price of $ 11.50 per share 98-1550630 ( I.R.S. Employer Identification No. ) ( 913 ) 981-1020 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : 66211 ( Zip code ) Trading symbol ( s ) SNPR.U SNPR SNPR WS Securities registered pursuant to Section 12 ( g ) of the Act : None Name of each exchange on which registered New York Stock Exchange New York Stock Exchange New York Stock Exchange Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . 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 . 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 ) . 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