Form 4 Filing for Ouster, Inc. - Spencer Darien Acquires 46,125 RSUs

This Form 4 filing reports a transaction by Spencer Darien, Chief Operating Officer of Ouster, Inc. On April 11, 2026, Mr. Darien acquired 46,125 restricted stock units (RSUs) with a reported transaction price of $0.00 per share. These RSUs represent a contingent right to receive one share of the Company's common stock upon vesting. The RSUs vest quarterly over a period of 12 months, starting from March 11, 2026, contingent upon continued service. Following this acquisition, Mr. Darien holds a total of 371,375 shares. The filing was signed by Megan Chung as Attorney-in-Fact for Darien Spencer on April 14, 2026.