144 0001847596 XXXXXXXX LIVE 0001816581 Ouster, Inc. 001-39463 350 Treat Avenue San Francisco CA 94110 415-949-0108 Mark Frichtl Officer Common Stock ETRADE FINANCIAL CORPORATION

3 EDISON DRIVE ALPHARETTA GA 30005

26674 760475.74 57819244 09/12/2025 NASDAQ Common Stock 09/11/2025 Restricted stock awards awarded under incentive award plan Issuer N 46160 03/28/2024 Services rendered Y Shares are to be sold to cover withholding taxes upon vesting of restricted stock units and restricted stock awards. Exhibit List: Exhibit 24 - Power of Attorney. 09/11/2025 06/09/2025 /s/ Megan Chung, as Attorney-in-Fact for Mark Frichtl