Company · Ownership research

Ouster, Inc. OUST

CIK 0001816581

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-09-10.

Insider purchases & sales

Purchased: $1.52M
Sold: $49.98M

Sep 1, 2023 – Sep 10, 2026
Available records · partial months are marked ·

202510 of 20 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-12-19	Tewksbury Ted L III Director	Sale10b5-1 footnote	$36.39K 1,695 shares sold	1.35% sold Direct holding	▾
2025-12-12	Heystee Susan Director	Sale	$291.59K 11,650 shares sold	21.87% sold Direct holding	▾
2025-12-12	Frichtl Mark Chief Technology Officer	Sale10b5-1 footnote	$391.21K 15,661 shares sold	2.34% sold Direct holding	▾
2025-12-12	SPENCER DARIEN Chief Operating Officer	Sale10b5-1 footnote	$272.73K 10,919 shares sold	3.15% sold Direct holding	▾
2025-12-12	Pacala Charles Angus President and CEO · Director	Sale10b5-1 footnote	$614.69K 24,610 shares sold	2.44% sold Direct holding	▾
2025-12-12	Chung Megan General Counsel and Secretary	Sale10b5-1 footnote	$267.17K 10,696 shares sold	5.36% sold Direct holding	▾
2025-11-11	Tewksbury Ted L III Director	Sale	$43.02K 1,695 shares sold	1.33% sold Direct holding	▾
2025-10-17	Chung Megan General Counsel and Secretary	Sale10b5-1 footnote	$181.06K 5,837 shares sold	2.87% sold Direct holding	▾
2025-09-12	SPENCER DARIEN Chief Operating Officer	Sale	$520.04K 18,274 shares sold	5.01% sold Direct holding	▾
2025-09-12	Frichtl Mark Chief Technology Officer	Sale	$720.82K 25,329 shares sold	3.67% sold Direct holding	▾

Showing 20 / 20 record groups in 2025. The complete set is available through the API.

Ouster, Inc. · OUST

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 20 of 20 purchase / sale groups and 18 of 18 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"OUST","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.