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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 X ( Mark One ) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( D ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31 , 2021 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( D ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Delaware ( State or other jurisdiction of incorporation or organization ) FORM 10 - K GROWTH CAPITAL ACQUISITION CORP . ( Exact name of registrant as specified in its charter ) 405 Lexington Ave New York , NY 10174 ( Address of principal executive offices ) Commission file number : 001-39959 Title of Each Class : Units , each consisting of one share of Class A common stock , and one - half of one redeemable warrant Class A common stock , par value $ 0.0001 per share Redeemable warrants , each whole warrant exercisable for one share of Class A common stock to 10174 ( Zip Code ) Registrant's telephone number , including area code : ( 212 ) 895-3500 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) GCACU GCAC GCACW 27-2447291 ( I.R.S. Employer Identification Number ) Name of Each Exchange on Which Registered : The NASDAQ Stock Market LLC The NASDAQ Stock Market LLC The NASDAQ Stock Market LLC 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 ■ No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange Act . Yes ** No x 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 x 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 and post such files ) . Yes x 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 definition of " large accelerated filer , " " accelerated filer , “ smaller reporting company ” and " emerging growth company " in Rule 12b - 2 of the Exchange Act .