Company · Ownership research

Ouster, Inc. OUST

CIK 0001816581

Form 4 transactions dated Sep 1, 2023 to Sep 26, 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 ·

2023, from Sep 1, 202310 of 12 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2023-12-18	SPENCER DARIEN Chief Operating Officer	Sale	$1.65K 241 shares sold	0.09% sold Direct holding	▾
2023-12-12	WEINSWIG MARK Chief Financial Officer	Sale	$14.73K 2,462 shares sold	1.37% sold Direct holding	▾
2023-12-12	SPENCER DARIEN Chief Operating Officer	Sale	$22.29K 3,726 shares sold	1.42% sold Direct holding	▾
2023-12-12	Chung Megan General Counsel and Secretary	Sale	$15.33K 2,563 shares sold	2.57% sold Direct holding	▾
2023-11-30	BOULET VIRGINIA Director	Purchase	$52.40K 10,000 shares bought	6.53% added Direct holding	▾
2023-11-29	WEINSWIG MARK Chief Financial Officer	Sale	$2.65K 504 shares sold	0.28% sold Direct holding	▾
2023-11-15	MADDOCK ERNEST E Director	Purchase	$37.01K 7,000 shares bought	17.98% added Direct holding	▾
2023-09-18	SPENCER DARIEN Chief Operating Officer	Sale	$1.13K 243 shares sold	0.09% sold Direct holding	▾
2023-09-15	BOULET VIRGINIA Director	Purchase	$46.80K 10,000 shares bought	6.99% added Direct holding	▾
2023-09-12	Chung Megan General Counsel and Secretary	Sale	$12.57K 2,614 shares sold	2.56% sold Direct holding	▾

Showing 12 / 12 record groups in 2023. 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 12 of 12 purchase / sale groups and 2 of 2 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.