X0306 4 2021-12-06 0 0001816581 Ouster, Inc. OUST 0001848814 Kantheti Krishna C/O BANYAN VENTURE HOLDINGS LLC 215 NW 24TH ST., SUITE 501 MIAMI FL 33127 0 0 1 0 0001850555 Banyan Venture Holdings LLC C/O BANYAN VENTURE HOLDINGS LLC 215 NW 24TH ST., SUITE 501 MIAMI FL 33127 0 0 1 0 Common Stock 2021-12-06 4 S 0 47434 6.26 D 25798606 I By Banyan Venture Holdings LLC Common Stock 2021-12-07 4 S 0 38408 6.36 D 25760198 I By Banyan Venture Holdings LLC The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $6.25 to $6.30, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. Mr. Kantheti is a Manager of Banyan Venture Holdings LLC ("Banyan"). As a result, Mr. Kantheti may be deemed to beneficially own the securities held by Banyan. Mr. Kantheti disclaims beneficial ownership of the securities held by Banyan except to the extent of his pecuniary interest therein. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $6.25 to $6.51, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. /s/ Krishna Kantheti 2021-12-08 Banyan Venture Holdings LLC, by /s/ Krishna Kantheti, as Manager 2021-12-08