144 0002117981 XXXXXXXX LIVE 0001816581 Ouster, Inc. 001-39463 350 TREAT AVENUE SAN FRANCISCO CA 94110 (415) 987-6972 Jacquemet Cyrille Officer Common Stock ETRADE FINANCIAL CORPORATION

3 EDISON DRIVE ALPHARETTA GA 30005

9642 361478.58 72112333 09/11/2026 NASDAQ Common Stock 09/11/2026 Restricted stock units awarded under incentive award plan Issuer N 13333 03/21/2025 Services rendered Common Stock 09/11/2026 Restricted stock units awarded under incentive award plan Issuer N 3459 04/11/2026 Services rendered N Cyrille Jacquemet

350 TREAT AVENUE SAN FRANCISCO CA 94110

Common Stock 06/12/2026 8723 338653.03 Shares are to be sold to cover withholding taxes upon vesting of restricted stock units. 09/11/2026 /s/ Megan Chung, as Attorney-in-Fact for Cyrille Jacquemet