Costco Wholesale Corp /New

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC COST

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/9/2026

Shares

328,468

Value ($000)

283,251

Weight

0.8%

2019 Q4 - 2025 Q4 (25 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/9/2026	283,251	0.8%	328,468	12/31/2025
2025 Q3	11/12/2025	298,738	0.8%	322,740	9/30/2025
2025 Q2	7/29/2025	372,698	1.0%	376,485	6/30/2025
2025 Q1	5/9/2025	334,408	0.9%	353,579	3/31/2025
2024 Q4	2/10/2025	308,953	0.8%	337,185	12/31/2024
2024 Q3	11/8/2024	303,070	0.7%	341,865	9/30/2024
2024 Q2	8/8/2024	311,152	0.8%	366,066	6/30/2024
2024 Q1	5/8/2024	261,112	0.7%	356,404	3/31/2024
2023 Q4	2/9/2024	260,182	0.8%	394,168	12/31/2023
2023 Q3	11/9/2023	247,171	0.8%	437,501	9/30/2023
2023 Q2	8/11/2023	201,757	0.6%	374,749	6/30/2023
2023 Q1	5/12/2023	179,620	0.6%	361,503	3/31/2023
2022 Q4	2/9/2023	221,477	0.8%	485,164	12/31/2022
2022 Q3	11/9/2022	218,280	0.9%	462,194	9/30/2022
2022 Q2	8/10/2022	207,501	0.8%	432,944	6/30/2022
2022 Q1	5/11/2022	194,919	0.6%	338,490	3/31/2022
2021 Q4	2/14/2022	175,367	0.5%	308,908	12/31/2021
2021 Q3	11/10/2021	96,321	0.3%	214,356	9/30/2021
2021 Q2	8/12/2021	86,449	0.3%	218,488	6/30/2021
2021 Q1	5/13/2021	75,977	0.2%	215,550	3/31/2021
2020 Q4	2/9/2021	67,679	0.2%	179,625	12/31/2020
2020 Q3	11/6/2020	81,299	0.3%	229,010	9/30/2020
2020 Q2	8/12/2020	40,995	0.2%	135,203	6/30/2020
2020 Q1	5/8/2020	35,531	0.2%	124,615	3/31/2020
2019 Q4	2/12/2020	37,078	0.1%	126,151	12/31/2019