X0508 4 2023-09-20 0 0001934064 ProSomnus, Inc. OSA 0001453424 Dow Brian B 5675 GIBRALTAR AVENUE PLEASANTON CA 94588 0 1 0 0 Chief Financial Officer 0 Series A Preferred Stock 1.00 2023-09-20 4 A 0 50 A 2023-09-20 Common Stock 50000 50 D Warrants (right to buy) 1.00 2023-09-20 4 A 0 50000 A 2028-09-20 Common Stock 50000 50000 D The Series A Preferred Stock is convertible (subject to certain conversion limitations prior to the Issuer obtaining stockholder approval of the transactions contemplated by the SPA) into Common Stock at the Reporting Person's election at $1 per share, which conversion price may be adjusted in accordance withe the terms of the Series A Preferred Stock, and has no expiration date. The Reporting Person acquired the shares and warrants pursuant to the terms of that certain Securities Purchase Agreement by and among the Issuer and the investors named therein, as disclosed in the Current Report on Form 8-K filed by the Issuer with the SEC on September 21, 2023 (the "SPA"). The warrants become exercisable upon the Issuer obtaining shareholder approval of the transactions contemplated by the SPA. /s/ Brian B. Dow 2023-09-21