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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 Delaware For the year ended December 31 , 2020 Commission File Number 001-39603 PETRA ACQUISITION INC . ( Exact name of registrant as specified in its charter ) 84-3898466 ( I.R.S. Employer Identification No. ) ( State or Other Jurisdiction of Incorporation ) 5 West 21st Street New York , NY ( Address of principal executive offices ) ( 971 ) 622-5800 ( Issuer's Telephone Number , Including Area Code ) Securities registered pursuant to Section 12 ( b ) of the Act : 10010 ( zip code ) Name of Each Exchange on Which Registered Title of Each Class Units , each consisting of one share of common stock and one redeemable warrant Common stock , par value $ 0.001 per share Redeemable warrants , exercisable for shares of common stock at an exercise price of $ 11.50 per share Trading Symbol ( s ) PAICU PAIC PAICW 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 15 ( d ) of the Exchange 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 Exchange Act of 1934 during the past 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirement 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 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 emerging growth company . See the 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 Non - accelerated filer ☑ ☑ Accelerated filer ☐ Smaller reporting company Emerging growth company ☑ If an emerging growth company , indicate by 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 is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes × No ◎ As of June 30 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , the registrant's common stock was not publicly traded . Accordingly , there was no market value for the registrant's common stock on such date .