X0407 4 2023-03-16 0 0001816581 Ouster, Inc. OUST 0001265677 WEINSWIG MARK 350 TREAT AVENUE SAN FRANCISCO CA 94110 0 1 0 0 Chief Financial Officer 0 Common Stock 2023-03-16 4 A 0 1120000 0.00 A 1910279 D Represents Company restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Company's common stock. The RSUs vest as to 1/16 of the total number of RSUs on each quarterly anniversary of the grant date, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date. /s/ Megan Chung, as Attorney-in-Fact for Mark Weinswig 2023-03-20