Company · Ownership research

COSTCO WHOLESALE CORP /NEW COST

CIK 0000909832

Form 4 transactions dated Nov 1, 2023 to Nov 11, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 61 rows; the complete set is available through the API.

Insider filings on file run through Oct 27, 2026.

Insider purchases & sales

Purchased: $0.00
Sold: $81.44M

Nov 1, 2023 – Oct 27, 2026
Available records · partial months are marked ·

Insiders in this window

202410 of 22 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 24, 2024	GALANTI RICHARD A Executive Vice President · Director	Sale	$1.27M 1,416 shares sold	4.92% sold Direct holding	▾
Oct 23, 2024	Jones Teresa A. Executive Vice President	Sale	$717.24K 800 shares sold	21.27% sold Direct holding	▾
Oct 15, 2024	Riel Pierre Executive Vice President	Sale	$1.79M 2,000 shares sold	16.38% sold Direct holding	▾
Oct 11, 2024	Miller Russell D Sr. Executive Vice President	Sale	$3.92M 4,400 shares sold	30.13% sold Trust holding	▾
Sep 30, 2024	Adamo Claudine Executive Vice President	Sale	$2.84M 3,200 shares sold	27.05% sold Direct holding	▾
Sep 30, 2024	Callans Patrick J Executive Vice President	Sale	$2.23M 2,500 shares sold	3.63% sold Direct holding	▾
Sep 30, 2024	Frates Caton Executive Vice President	Sale	$1.50M 1,700 shares sold	14.94% sold Direct holding	▾
Aug 15, 2024	GALANTI RICHARD A Executive Vice President · Director	Sale	$437.02K 500 shares sold	2.14% sold Direct holding	▾
Aug 15, 2024	DECKER SUSAN L Director	Sale	$543.43K 620 shares sold	5.00% sold Direct holding	▾
Aug 13, 2024	GALANTI RICHARD A Executive Vice President · Director	Sale	$431.94K 500 shares sold	2.06% sold Direct holding	▾

Showing 22 / 22 record groups in 2024. The complete set is available through the API.

COSTCO WHOLESALE CORP /NEW · COST

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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 22 of 22 purchase / sale groups and 30 of 61 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"COST","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

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. Share totals are on today's split-adjusted basis. 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.