Darien Spencer - 14 Sep 2026 Form 4 Insider Report for Ouster, Inc. (OUST)

Reporting relationship: Chief Operating Officer
Issuer ticker: OUST
Reported as of: 14 Sep 2026
Net transaction value: -$434,953
SEC form: 4
Accepted by SEC: 16 Sep 2026, 19:08:00 UTC
Prior SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Kenneth Gianella, as Attorney-in-Fact for Darien Spencer

Key filing fact

Darien Spencer filed Form 4 for Ouster, Inc. (OUST) on 16 Sep 2026.

Key facts

This page summarizes Darien Spencer's Form 4 filing for Ouster, Inc. (OUST).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 16 Sep 2026, 19:08.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
Current net transaction value: -$434,953.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001226378 Primary reporting owner

SPENCER DARIEN

Relationship: Chief Operating Officer
Address: 350 TREAT AVENUE, SAN FRANCISCO
Signature: /s/ Kenneth Gianella, as Attorney-in-Fact for Darien Spencer
Signature date: 16 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OUST transaction

Common Stock

Sale

Transaction value: $434,953
Shares: -12,808
Change %: -4.3%
Price: $33.96
Shares after: 286,998
Date: 14 Sep 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

Reflects shares sold to cover withholding taxes incurred upon the vesting and settlement of restricted stock units pursuant to a Rule 10b5-1 sale to cover instruction letter dated August 19, 2025.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.688 to $33.9661. The Reporting Person undertakes to provide 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 in this footnote.

SEC remarks

Exhibit List - Exhibit 24 - Power of Attorney