MARK FRICHTL plan to sell securities of Ouster, Inc. under Form 144

MARK FRICHTL filed Form 144 to notify SEC of plan to sell 136434 units of Ouster, Inc. securities around 2026-05-13, with aggregate market value of $3,697,361.40. The total outstanding units is 63672949.0. The amount planned to be sold represents 0.21% of total outstanding units; Recent transactions in past 3 months include: On 05/05/2026, sold 13451 units for $403530.00; On 05/04/2026, sold 21149 units for $637160.15; On 04/22/2026, sold 400 units for $12000.00; On 04/21/2026, sold 60000 units for $1713861.00; On 04/20/2026, sold 60000 units for $1594806.00; On 04/17/2026, sold 30000 units for $754395.00; On 04/15/2026, sold 20000 units for $480000.00; On 04/14/2026, sold 40000 units for $910248.00; On 03/25/2026, sold 40000 units for $837576.00; On 03/12/2026, sold 15689 units for $367637.20;