X0306 4 2021-03-11 0 0001816581 Ouster, Inc. OUST 0001221137 BASS CARL 350 TREAT AVENUE SAN FRANCISCO CA 94110 1 0 0 0 Stock Option 12.00 2021-03-11 4 A 0 1614492 0.00 A 2030-10-01 Common Stock 1614492 1614492 D Restricted Stock Units 2021-03-11 4 A 0 807246 0.00 A Common Stock 807246 807246 D Performance Stock Units 2021-03-11 4 A 0 807246 0.00 A Common Stock 807246 807246 D Represents an award of stock options on March 11, 2021 (the "Grant Date"), which vests as to 20% of the stock options on each anniversary of February 15, 2021 (the "Bass Commencement Date"), subject to continued service; provided, however, that the stock options will only become exercisable in the event the closing trading price per share of Issuer's common stock equals or exceeds 130% of the exercise price per share of the stock options for 30 consecutive trading days (the "Stock Price Condition") and in the event the Stock Price Condition is not met on or prior to the fifth anniversary of the Grant Date, the stock options shall thereupon terminate for no consideration. Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest as to 20% of the total number of RSUs on the first five anniversaries of the Bass Commencement Date, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date. Each performance stock unit ("PSU") represents a contingent right to receive one share of common stock. The PSUs vest as to 25% of the total number of RSUs upon on each of the following events, in each case subject to the reporting person's continued service through the applicable vesting date: (a) first time the closing trading price per share of Issuer's common stock exceeds 150% of the closing trading price per share of Issuer's common stock on the Grant Date (the "Grant Date FMV") on or after the first anniversary of the Grant Date; (b) 200% of the Grant Date FMV on or after the second anniversary of the Grant Date; (c) 250% of the Grant Date FMV on or after the third anniversary of the Grant Date; and (d) 300% of the Grant Date FMV on or after the fourth anniversary of the Grant Date. Any PSUs that have not vested as of the fifth anniversary of the Grant Date shall thereupon terminate for no consideration. The PSUs have no expiration date. /s/ Myra Pasek, Attorney-in-Fact 2021-03-15