X0306 4 2021-03-11 0 0001816581 Ouster, Inc. OUST 0001466128 Mitra Sundari 350 TREAT AVENUE SAN FRANCISCO CA 94110 1 0 0 0 Restricted Stock Units 2021-03-11 4 A 0 22696 0.00 A Common Stock 22696 22696 D Restricted Stock Units 2021-03-11 4 A 0 15446 0.00 A Common Stock 15446 15446 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest as to 1/12 of the 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. The RSUs vest as to 25% of the 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/ Myra Pasek, Attorney-in-Fact 2021-03-15