Costco Wholesale COST Institutional Ownership

NASDAQ COST

$998.31 +3.70 (+0.37%)

At close: Oct 21, 2026 · 4:00 PM EDT

As of the 13F quarter ended Jun 30, 2026, 4,203 institutions held 73.16% of Costco Wholesale (COST) shares outstanding. Versus the prior quarter, institutional ownership was up 3.49 percentage points, the holder count fell by 14 and shares held were up 5.00%. The largest holder is BlackRock, Inc. with 34.20Mn shares (7.70% of outstanding).

Updated Oct 16, 2026 Costco Wholesale (COST) stock price and overview

Institutions by Trading Activity

4,203 Institutions

Increased 1,919 45.7%

Unchanged 582 13.8%

Reduced 1,702 40.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

73.16%

▲+3.49 pp QoQ

Shares Held by Institutions

324.79Mn

of 443.92Mn outstanding

▲+5.00% QoQ

Shares Outstanding

443.92Mn

119.13Mn held outside 13F filers

Institutional Investors

4,203

filed 13F for Jun 2026

▼-14 vs prior quarter

Net Shares Added (QoQ)

+15.47Mn

accumulated since last quarter

Value of Holdings

$323.04Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 16, 2026

Costco Wholesale Corp (NASDAQ:COST) counted 4,198 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

Together they owned 73.16% of the outstanding stock in Q2 2026, up from 69.67% a quarter earlier.
Total shares held in COST rose 5.00% from Q1 2026; the number of holders rose 6.20% from Q2 2025.
Of the 4,198 holders, 1,916 added to their positions, 1,700 reduced their stakes and 582 left their positions unchanged in Q2 2026.
Institutional investors held 324.78Mn shares of Costco Wholesale in total at the end of Q2 2026, up 15.46Mn from the prior quarter and up 30.65Mn from a year earlier.
BlackRock, Inc. was the top holder of Costco Wholesale as of June 30, 2026, with 34.2Mn shares, or 7.70% of shares outstanding.
Among holders that already owned Costco Wholesale, the biggest buyers in Q2 2026 were Invesco Ltd. (+9.68Mn shares), Ascentis Wealth Management, LLC (+2.32Mn shares), SG Americas Securities, LLC (+955.93K shares), Marshall Wace, LLP (+910.73K shares) and Royal Bank of Canada (+533.26K shares).
Holders that trimmed the most shares of Costco Wholesale in Q2 2026 while keeping a position were Diamant Asset Management, Inc. (-6.72Mn shares), BlackRock, Inc. (-744.21K shares), FMR LLC (-555.05K shares), T. Rowe Price Associates Inc (-512.52K shares) and Amundi (-414.56K shares).
Per Business Quant data, the 10 largest holders of Costco Wholesale at the end of Q2 2026 were BlackRock, Inc. (34.2Mn shares), Vanguard Capital Management LLC (28.98Mn shares), State Street Corp (18.38Mn shares), Invesco Ltd. (13.99Mn shares), Geode Capital Management, LLC (10.63Mn shares), Vanguard Portfolio Management LLC (10.4Mn shares), Morgan Stanley (10.22Mn shares), Bank of America Corp (7.25Mn shares), Norges Bank (6.47Mn shares) and FMR LLC (6.16Mn shares).

Form 13F Holdings

4,208 Institutional Holders

Report period 30 Jun, 2026

Total shares held 324.79Mn

Of outstanding 73.16%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	34,202,834	7.70%	▼744,206	-2.13%	$32.00Bn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	28,976,605	6.53%	▲129,157	+0.45%	$27.11Bn
3	State Street Corp	0000093751	18,384,951	4.14%	▲232,719	+1.28%	$17.20Bn
4	Invesco Ltd.	0000914208	13,989,137	3.15%	▲9,675,631	+224.31%	$13.09Bn
5	GEODE CAPITAL MANAGEMENT, LLC	0001214717	10,627,472	2.39%	▼31,752	-0.30%	$9.90Bn
6	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	10,402,555	2.34%	▼303,080	-2.83%	$9.73Bn
7	Morgan Stanley	0000895421	10,220,437	2.30%	▲321,726	+3.25%	$9.56Bn
8	Bank Of America Corp /De/	0000070858	7,249,774	1.63%	▼265,257	-3.53%	$6.78Bn
9	NORGES BANK	0001374170	6,474,767	1.46%	▲6,474,767	0.00%	$6.06Bn
10	FMR LLC	0000315066	6,163,541	1.39%	▼555,048	-8.26%	$5.77Bn
11	Northern Trust Corp	0000073124	4,835,919	1.09%	▼92,188	-1.87%	$4.52Bn
12	Royal Bank Of Canada	0001000275	4,292,111	0.97%	▲533,261	+14.19%	$4.02Bn
13	Jpmorgan Chase & Co	0000019617	4,224,191	0.95%	▲184,275	+4.56%	$4.00Bn
14	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	3,631,675	0.82%	▲231,372	+6.80%	$3.40Bn
15	Goldman Sachs Group Inc	0000886982	3,293,734	0.74%	▲79,925	+2.49%	$3.08Bn
16	Fisher Asset Management, LLC	0000850529	3,253,040	0.73%	▲33,184	+1.03%	$3.04Bn
17	Bank of New York Mellon Corp	0001390777	3,215,058	0.72%	▼176,566	-5.21%	$3.01Bn
18	Nuveen, LLC	0001871926	3,189,881	0.72%	▲115,824	+3.77%	$2.98Bn
19	Wells Fargo & Company/Mn	0000072971	3,106,170	0.70%	▼5,704	-0.18%	$2.91Bn
20	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0000861177	3,068,312	0.69%	▲160,893	+5.53%	$2.87Bn

Showing 1 to 20 of 4,208 holders