Gianella Kenneth P. 4

What Happened

• Kenneth P. Gianella, Chief Financial Officer of Ouster, sold 54,337 shares on June 12, 2026, generating approximately $2,109,525. The reported weighted-average price was $38.82; individual sale prices ranged from $38.82 to $39.54.
• This was a sale (not a purchase) and was executed under a Rule 10b5‑1 “sale to cover” instruction related to restricted stock unit vesting and settlement.

Key Details

• Transaction date: 2026-06-12; Form 4 filed: 2026-06-16 (filed within the required reporting window).
• Shares sold: 54,337; reported proceeds: $2,109,525 (weighted-average price $38.82; price range $38.82–$39.54).
• Reason/footnote: F1 — shares sold to cover withholding taxes on RSU vesting pursuant to a Rule 10b5‑1 sale‑to‑cover instruction dated August 20, 2025.
• Additional footnote: F2 — reported price is a weighted average; the filer can provide per‑trade price breakdown on request.
• Shares owned after the transaction: not specified in the information provided in this summary.

Context

• Sales to cover tax withholding on vested RSUs are routine and do not necessarily indicate a change in an insider’s view of the company’s prospects.
• The transaction was executed under a prearranged 10b5‑1 plan, which typically automates sales for tax or diversification needs rather than reflecting active market timing.