Certain Class B Common Stock of B. Riley Principal 150 Merger Corp. are subject to a Lock-Up Agreement Ending on 18-AUG-2021. These Class B Common Stock will be under lockup for 181 days starting from 18-FEB-2021 to 18-AUG-2021.

Details:
The directors and executive officers and holders of substantially all of its stockholders have agreed they will not, subject to certain exceptions offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, without the prior written consent of Citigroup Global Markets Inc. of any units, warrants, Class A ordinary shares or any other securities convertible into, or exercisable, or exchangeable for, Class A common stock during the period ending 185 days from the date of this prospectus.