UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Title of each class Trading Symbol(s) Name of each exchange on which registered Units, each consisting of one share of Class A common stock and one-third of one redeemable warrant BRPMU The Nasdaq Stock Market LLC Class A common stock, par value $0.0001 per share BRPMU The Nasdaq Stock Market LLC Warrants, each whole warrant exercisable to purchase one share of Class A common stock, each at an exercise price of $11.50 per share BRPMW Th ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 Or ☐ 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 001-40083 B. RILEY PRINCIPAL 150 MERGER CORP. (Exact Name of Registrant as Specified in Its Charter) | --- | --- | |------------ ...