WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in COST — Costco Wholesale Corp /New

CIK 1644956 CHICAGO, IL

Back to COST Full portfolio

Position in COST

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$186,490,621

-$114,897,568 QoQ

Shares Held

199,355

-34.1% QoQ

Ownership

0.045%

of shares outstanding

% of Portfolio

0.57%

of 13F equity value

Holder Rank

#171

of 4,193 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 88% Shared 0% None 12%

Common Shares in COST Over Time

Shares Held

Position Value (USD)

Position in Discount Stores

Consumer Defensive · as of Jun 30, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $252,060,186 across 4 Discount Stores names. COST ranks #1 (74.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	COST	Costco Wholesale Corp /New This page	199,355	$186,490,621
2	PSMT	Pricesmart Inc	272,127	$53,157,288
3	WMT	Walmart Inc.	57,264	$6,485,720
4	TBBB	Bbb Foods Inc	142,226	$5,926,557

All Filings in COST

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26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$186,490,621	199,355	-34.1%	Shares	Sole	2026-08-12
2026-03-31	$301,388,189	302,468	-7.9%	Shares	Sole	2026-05-08
2025-12-31	$283,251,095	328,468	+1.8%	Shares	Sole	2026-02-09
2025-09-30	$298,737,826	322,740	-14.3%	Shares	Sole	2025-11-12
2025-06-30	$372,697,560	376,485	+6.5%	Shares	Sole	2025-07-29
2025-03-31	$334,407,946	353,579	+4.9%	Shares	Sole	2025-05-09
2024-12-31	$308,952,499	337,185	-1.4%	Shares	Sole	2025-02-10
2024-09-30	$303,070,159	341,865	-6.6%	Shares	Sole	2024-11-08
2024-06-30	$311,152,439	366,066	+2.7%	Shares	Sole	2024-08-08
2024-03-31	$261,112,262	356,404	-9.6%	Shares	Sole	2024-05-08
2023-12-31	$260,182,413	394,168	-9.9%	Shares	Sole	2024-02-09
2023-09-30	$247,170,564	437,501	+16.7%	Shares	Sole	2023-11-09
2023-06-30	$201,757,366	374,749	+3.7%	Shares	Sole	2023-08-11
2023-03-31	$179,619,995	361,503	-25.5%	Shares	Sole	2023-05-12
2022-12-31	$221,477,366	485,164	+5.0%	Shares	Sole	2023-02-09
2022-09-30	$218,280,360	462,194	+6.8%	Shares	Sole	2022-11-09
2022-06-30	$207,501,400	432,944	+27.9%	Shares	Sole	2022-08-10
2022-03-31	$194,919,466	338,490	+9.6%	Shares	Sole	2022-05-11
2021-12-31	$175,367,071	308,908	+44.1%	Shares	Sole	2022-02-14
2021-09-30	$96,320,868	214,356	-1.9%	Shares	Sole	2021-11-10
2021-06-30	$86,449,146	218,488	+1.4%	Shares	Sole	2021-08-12
2021-03-31	$75,977,064	215,550	+20.0%	Shares	Sole	2021-05-13
2020-12-31	$67,679,107	179,625	-21.6%	Shares	Sole	2021-02-09
2020-09-30	$81,298,550	229,010	+69.4%	Shares	Sole	2020-11-06
2020-06-30	$40,994,901	135,203	+8.5%	Shares	Sole	2020-08-12
2020-03-31	$35,531,474	124,615	—	Shares	Sole	2020-05-08
No filing history on record for this holder in this stock.