Costco Wholesale Corporation (COST) Institutional Ownership & Insider Trading

4,223 institutions reported holding Costco Wholesale Corporation shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 15 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-08-30 · read by EquiReason

COSTCostco Wholesale CorporationFollow COST — free

Discount Stores · Consumer Defensive

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Market cap: 444.6B
P/E TTM: 48.3
Dividend yield: 0.6%
52-week: —
Next earnings: 10 Dec, in 47 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

4,223 institutions held 72.9% of the shares. Across filers that reported both quarters, shares held changed -1.1%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	4,223	323	-1.1%	1312	114	1303	124
Mar 26	4,189	310	+3.9%	1395	217	1280	76
Dec 25	3,988	303	-0.6%	1225	82	1294	143
Sep 25	3,842	299	-1.1%	1229	90	1177	136
Jun 25	3,913	305	+0.1%	1334	136	1121	64
Mar 25	3,830	298	-0.3%	1215	119	1312	87
Dec 24	3,767	304	-0.4%	1135	95	1070	57
Sep 24	3,475	295	-4.7%	1101	113	1088	61

Costco Wholesale Corporation — questions

Who owns Costco Wholesale Corporation stock?: 4,223 institutions reported Costco Wholesale Corporation shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (7.7%), VANGUARD CAPITAL MANAGEMENT LLC (6.5%), STATE STREET CORP (4.2%).
Are Costco Wholesale Corporation insiders buying or selling?: 15 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Costco Wholesale Corporation's own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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