$COST

$1,005.16 +$1.84 (0.18%) Live

$COST Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 443.1M shares outstanding

Who owns COST?

By type of holder

Institutions 72.6% Insiders 0.2% Everyone else 27.2%

Concentration Top 10 holders own 33.1%

BlackRock, Inc. 7.7% · Vanguard Capital Management LLC 6.5%

Institutional ownership

72.6%

+0.6 pts vs last qtr

Institutional holders

4,211

-27 vs last qtr

Net shares bought

+2.5M

by institutions in Q2 2026

New / sold out

204 / 231

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Norges Bank NEW +6.5M
SG Americas Securities, LLC +955.9K

Biggest sellers in Q2 2026

Diamant Asset Management, Inc. −6.7M
BlackRock, Inc. −744.2K

Who is planning to sell?

Notices of proposed sale, last 12 months

$16.6M

15 notices from 11 people

Shares covered

17.7K

0.00% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Wilcox William Richard Officer $3.29M
Adamo Claudine Officer $2.75M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2017–FY2026

+0.8%

+0.09% a year

Each share's claim on the business

−0.8%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$5.3B vs $7.04B

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years87% 3–5 years3% 1–3 years5% Under 1 year4%

Quarterly turnover

6.0%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting COST on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	34.2M	7.72%	−744.2K (−2.1%)	≤2021	0.5%
Shares held by quarter Peak holding35.6M (Q2'25) Change over 8 quarters+647.3K Share of the company7.720% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	29.0M	6.54%	+129.2K (+0.4%)	≤2021	0.6%
Shares held by quarter Peak holding29.0M (Q2'26) Change over 8 quarters+29.0M Share of the company6.540% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

34.2M

% of company

7.72%

Change vs last qtr

−744.2K (−2.1%)

Held since

≤2021

Vanguard Capital Management LLC

29.0M

% of company

6.54%

Change vs last qtr

+129.2K (+0.4%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Costco Wholesale Corp, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting COST on Form N-PORT; together they hold 26.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$13.2B	14.1M	3.18%	0.57%	June 30, 2026
V5 Vanguard 500 Index Fund Vanguard Index Funds	$10.8B	11.5M	2.59%	0.64%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$13.2B

% of company

3.18%

% of the fund

0.57%

As of

June 30, 2026

Vanguard 500 Index Fund

Vanguard Index Funds

Position value

$10.8B

% of company

2.59%

% of the fund

0.64%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Costco Wholesale Corp and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
JW Jelinek W Craig Insider	522.5K	0.12%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.120% Jelinek W Craig's insider activity →
VR Vachris Roland Michael Insider	62.6K	0.01%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.010% Vachris Roland Michael's insider activity →

Jelinek W Craig

Insider

522.5K

% of company

0.12%

Change vs last qtr

—

Held since

—

Vachris Roland Michael

Insider

62.6K

% of company

0.01%

Change vs last qtr

—

Held since

—

24 more holders behind a free account

See every insider and 5%+ holder of Costco Wholesale Corp.

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