X0306 4 2022-12-13 0 0001816581 Ouster, Inc. OUST 0001226378 SPENCER DARIEN 350 TREAT AVENUE SAN FRANCISCO CA 94110 0 1 0 0 EVP of Global Operations Common Stock 2022-12-13 4 S 0 12897 1.2115 D 1598254 D Reflects shares sold to cover withholding taxes incurred upon the vesting and settlement of restricted stock units ("RSUs") in a trade that was initiated by the issuer on the reporting person's behalf pursuant to terms of the applicable RSU agreement. Reflects the weighted average of all shares sold to cover taxes upon vesting of RSUs on December 11, 2022 for certain employees of the Issuer. /s/ Darien Raymond Spencer 2022-12-14