COST COSTCO WHOLESALE CORPORATION

COM (common), issuer CIK 909832

4,200 managers (4,278 13F filers) reported a position in COST shares at 2026-03-31, 320,333,954 shares in all. 249 filers opened a position and 127 filers sold out during the quarter.

Managers: 4,200
13F filers: 4,278
New: 249
Added: 1,799
Reduced: 1,638
Sold out: 127
Shares held by filers: 320,333,954

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
Owner	Date	Shares	Price	Filing
Wilcox William Richardofficer (Executive Vice President)	2026-10-13	-1,100 S	$958.205	Form 4

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

Holder	Shares	Value	% of portfolio	Change	Source
Gerber Kawasaki Wealth & Investment Man…	5,941	$5.92M	0.19%	+443	13F-HR Timeline
BNC WEALTH MANAGEMENT, LLC	5,935	$5.91M	1.64%	+1,290	13F-HR Timeline
GM Advisory Group, LLC	5,934	$5.91M	0.23%	-439	13F-HR Timeline
SWEENEY & MICHEL, LLC	6,017	$5.9M	1.74%	-99	13F-HR Timeline
CONNING INC.in group CONNING INC.	5,919	$5.9M	0.2%	-909	13F-HR Timeline Group
MIRAMONTES CAPITAL, LLC	5,909	$5.89M	2.04%	+163	13F-HR Timeline
FIRST CITIZENS BANK & TRUST CO	5,900	$5.88M	0.12%	-11,503	13F-HR Timeline
PFC CAPITAL GROUP, INC.	5,889	$5.87M	2.59%	-28	13F-HR Timeline
Westerkirk Capital Inc.	5,882	$5.86M	0.63%	-176	13F-HR Timeline
BUFFALO BUSINESS & ESTATE SERVICES LTD	5,880	$5.86M	0.85%	-570	13F-HR Timeline
PATRON PARTNERS, LLC	5,860	$5.84M	2.58%	-120	13F-HR Timeline
Mezzasalma Advisors, LLC	5,851	$5.83M	1.49%	+557	13F-HR Timeline
PRIVATE TRUST CO NA	5,844	$5.82M	0.52%	+63	13F-HR Timeline
Alhambra Investment Management LLC	5,834	$5.81M	2.68%	0	13F-HR Timeline
Manhattan West Asset Management, LLC	5,831	$5.81M	1.14%	+475	13F-HR Timeline
Sound View Wealth Advisors Group, LLC	5,828	$5.81M	0.4%	+64	13F-HR Timeline
SIGNET FINANCIAL MANAGEMENT, LLC	5,819	$5.8M	0.65%	+37	13F-HR Timeline
Kathmere Capital Management, LLC	5,816	$5.79M	0.36%	+1,414	13F-HR Timeline
Aprio Wealth Management, LLC	5,814	$5.79M	0.32%	+447	13F-HR Timeline
Banque Cantonale Vaudoisein group Banque Cantonale Vaudoise	5,811	$5.79M	0.22%	+1,367	13F-HR Timeline Group
Marathon Wealth Advisors LLC	5,791	$5.77M	2.37%	+241	13F-HR Timeline
Cypress Wealth Services, LLC	5,770	$5.75M	0.81%	+79	13F-HR Timeline
Cornerstone Wealth Management, LLC	5,761	$5.74M	0.29%	-127	13F-HR Timeline
Claret Asset Management Corp	5,726	$5.71M	0.68%	+3	13F-HR Timeline
BEACON INVESTMENT ADVISORS LLC	5,717	$5.7M	2.15%	-99	13F-HR Timeline
OneAscent Financial Services LLCgroup of 4 filers holding	5,715	$5.69M		+1,020	Timeline OneAscent Financial Services LLC: 4,349 (0.23%) 13F-HR OneAscent Wealth Management LLC: 886 (0.29%) 13F-HR OneAscent Investment Solutions LLC: 246 (0.25%) 13F-HR OneAscent Family Office, LLC: 234 (0.16%) 13F-HR
INSPIRE TRUST CO, N.A.	5,715	$5.69M	0.88%	+15	13F-HR Timeline
Sunbelt Securities, Inc.	5,714	$5.69M	0.36%	+105	13F-HR Timeline
Oak Asset Management, LLC	5,714	$5.69M	1.96%	+13	13F-HR Timeline
WD RUTHERFORD LLC	5,707	$5.69M	2.53%	-197	13F-HR Timeline
Midwest Professional Planners, LTD.	5,695	$5.67M	1.34%	-609	13F-HR Timeline
ICW Investment Advisors LLC	5,695	$5.67M	2.05%	+224	13F-HR Timeline
Linscomb Wealth, Inc.	5,681	$5.66M	0.25%	-1,001	13F-HR Timeline
American Trust	5,670	$5.65M	0.5%	-1,151	13F-HR Timeline
Godshalk Welsh Capital Management, Inc.	5,649	$5.63M	3.26%	-27	13F-HR Timeline
Etesian Wealth Advisors, Inc.	5,639	$5.62M	1.79%	-973	13F-HR Timeline
Strait & Sound Wealth Management LLC	5,638	$5.62M	2.14%	+10	13F-HR Timeline
New Hampshire Trust	5,632	$5.61M	1.13%	+87	13F-HR Timeline
Resonant Capital Advisors, LLC	5,631	$5.61M	0.29%	+616	13F-HR Timeline
Avestar Capital, LLC	5,629	$5.61M	0.38%	+268	13F-HR Timeline
Madrona Financial Services, LLC	5,585	$5.57M	1.22%	-175	13F-HR Timeline
Aaron Wealth Advisors LLC	5,583	$5.56M	0.32%	+134	13F-HR Timeline
Generali Investments CEE, investicni sp…	5,581	$5.56M	0.29%	-410	13F-HR Timeline
Coleford Investment Management Ltd.	5,580	$5.56M	1.36%	new	13F-HR Timeline
Left Brain Wealth Management, LLC	5,569	$5.55M	2.18%	+99	13F-HR Timeline
ATLAS CAPITAL ADVISORS INC.	5,567	$5.55M	0.63%	+13	13F-HR Timeline
TRUSTMARK BANK TRUST DEPARTMENT	5,564	$5.54M	0.36%	-471	13F-HR Timeline
Family Legacy, Inc.	5,560	$5.54M	1.66%	-84	13F-HR Timeline
Somerset Trust Co	5,556	$5.54M	1.7%	-26	13F-HR Timeline
Asset One Wealth Management LLC	5,501	$5.53M	0.61%	+530	13F-HR Timeline
IPG Investment Advisors LLC	5,549	$5.53M	0.95%	+1,605	13F-HR Timeline
Bank of New Hampshire	5,528	$5.51M	1.26%	-59	13F-HR Timeline
William Allan Corp	5,522	$5.5M	3.26%	+3	13F-HR Timeline
Financiere des Professionnels - Fonds d…	5,520	$5.5M	0.32%	new	13F-HR Timeline
Harold Davidson & Associates Inc.	5,519	$5.5M	2.67%	-14	13F-HR Timeline
Cohen Capital Management, Inc.	5,511	$5.49M	0.85%	+74	13F-HR Timeline
MCCARTER PRIVATE WEALTH SERVICES LLC	5,509	$5.49M	2.39%	+38	13F-HR Timeline
Rheos Capital Works Inc.	5,500	$5.48M	0.37%	new	13F-HR Timeline
Roberts Wealth Advisors, LLC	5,487	$5.47M	1.39%	+46	13F-HR Timeline
Brentview Investment Management LLC	5,484	$5.46M	2.36%	+215	13F-HR Timeline
Allen Investment Management, LLCin group ALLEN OPERATIONS LLC	5,481	$5.46M	0.07%	+6	13F-HR Timeline Group
Convergence Financial, LLC	5,478	$5.46M	0.58%	+2,778	13F-HR Timeline
MASTERINVEST Kapitalanlage GmbH	5,460	$5.44M	0.57%	+1,094	13F-HR Timeline
Pine Haven Investment Counsel, Inc	5,456	$5.44M	4%	-43	13F-HR Timeline
Trail Ridge Investment Advisors, LLC	5,452	$5.43M	2.36%	+17	13F-HR Timeline
Investors Portfolio Services LLC	5,430	$5.43M	5.03%	+1,342	13F-HR Timeline
LITTLE HOUSE CAPITAL LLC	5,446	$5.43M	1.4%	+267	13F-HR Timeline
INTRUST BANK NA	5,439	$5.42M	0.44%	+504	13F-HR Timeline
Weaver Capital Management LLC	5,431	$5.41M	1.18%	-233	13F-HR Timeline
StoneX Group Inc.in group StoneX Group Inc.	5,432	$5.41M	0.29%	-2,127	13F-HR Timeline Group
Front Row Advisors LLC	5,425	$5.41M	1.83%	-22	13F-HR Timeline
GHE, LLC	5,415	$5.4M	2.24%	-718	13F-HR/A Timeline
BAXTER BROS INC	5,392	$5.37M	0.66%	-112	13F-HR Timeline
Argentarii, LLC	5,389	$5.37M	1.88%	-193	13F-HR Timeline
ROWLANDMILLER & PARTNERS.ADV	5,376	$5.36M	1.09%	-540	13F-HR Timeline
LIBERTY ONE INVESTMENT MANAGEMENT, LLC	5,371	$5.35M	0.55%	+1,366	13F-HR Timeline
LAFFER TENGLER INVESTMENTS, INC.	5,369	$5.35M	0.79%	+420	13F-HR Timeline
ROMANO BROTHERS AND COMPANY	5,360	$5.34M	0.61%	-75	13F-HR Timeline
Ascent Wealth Partners, LLC	5,356	$5.34M	0.62%	+1,880	13F-HR Timeline
Csenge Advisory Group	5,343	$5.32M	0.24%	+147	13F-HR Timeline
McDonough Capital Management, Inc	5,312	$5.29M	2.89%	-13	13F-HR Timeline
Linden Thomas Advisory Services, LLC	5,310	$5.29M	0.51%	+1,272	13F-HR Timeline
VALICENTI ADVISORY SERVICES INC	5,309	$5.29M	1.15%	-6	13F-HR Timeline
New Age Alpha Advisors, LLC	5,302	$5.28M	0.25%	-162	13F-HR Timeline
SBI Securities Co., Ltd.	5,302	$5.28M	0.14%	-626	13F-HR Timeline
MORGUARD LINCLUDEN GLOBAL INVESTMENTS L…	5,297	$5.28M	0.56%	+239	13F-HR Timeline
Qtron Investments LLC	5,294	$5.28M	0.72%	+2	13F-HR Timeline
Sovran Advisors, LLC	5,196	$5.27M	0.41%	-107	13F-HR Timeline
EVOKE WEALTH, LLC	5,286	$5.27M	0.1%	+338	13F-HR Timeline
TRUE Private Wealth Advisors	5,279	$5.26M	0.5%	+168	13F-HR Timeline
Mirador Capital Partners LP	5,276	$5.26M	0.74%	+16	13F-HR Timeline
Trivium Point Advisory, LLC	5,264	$5.25M	0.95%	-858	13F-HR Timeline
Harrington Investments, INC	5,225	$5.21M	2.74%	-11	13F-HR Timeline
TCTC Holdings, LLCin group TCTC Holdings, LLC	5,201	$5.18M	0.15%	-160	13F-HR Timeline Group
Stillwater Wealth Management Group	5,193	$5.17M	3.2%	+275	13F-HR Timeline
Trivant Custom Portfolio Group, LLC	5,179	$5.16M	2.83%	-81	13F-HR Timeline
Clean Yield Group	5,172	$5.15M	1.45%	+4,479	13F-HR Timeline
Sone Capital Management, LLC	5,167	$5.15M	0.43%	new	13F-HR Timeline
SevenBridge Financial Group, LLC	5,125	$5.14M	0.81%	+761	13F-HR Timeline
ALLIUM FINANCIAL ADVISORS, LLC	5,149	$5.13M	4.11%	-2,129	13F-HR Timeline
Snider Financial Group	5,142	$5.12M	1.55%	-491	13F-HR Timeline
Everhart Financial Group, Inc.	5,131	$5.11M	0.44%	+43	13F-HR Timeline
Stanley-Laman Group, Ltd.	5,127	$5.11M	0.63%	+185	13F-HR Timeline
AVISO WEALTH MANAGEMENT	5,119	$5.1M	2.3%	+435	13F-HR Timeline
Curtis Advisory Group, LLC	5,117	$5.1M	1.1%	+582	13F-HR Timeline
NORDEN GROUP LLC	5,111	$5.09M	0.49%	+654	13F-HR Timeline
KKM Financial LLC	5,882	$5.07M	0.9%	0	13F-HR Timeline
Eley Financial Management, Inc	5,090	$5.07M	1.83%	-1	13F-HR/A Timeline
Inlet Private Wealth, LLC	5,080	$5.06M	1.29%	-200	13F-HR Timeline
CHICAGO TRUST Co NA	5,025	$5.01M	0.8%	+705	13F-HR Timeline
Fruth Investment Management	5,025	$5.01M	1.25%	-5	13F-HR Timeline
Centric Wealth Management	4,935	$5M	1%	+100	13F-HR Timeline
CoreCap Advisors, LLC	5,015	$5M	0.17%	+211	13F-HR Timeline
S.A. Mason LLC	5,008	$4.99M	1.87%	+5	13F-HR Timeline
CAPITAL ADVISORS INC/OK	5,005	$4.99M	0.08%	+47	13F-HR Timeline
S-Bank Fund Management Ltd	5,000	$4.98M	0.74%	new	13F-HR Timeline
Processus Wealth & Capital Management, …	4,999	$4.98M	3.38%	+36	13F-HR Timeline
Lafayette Investments, Inc.	4,992	$4.97M	1.01%	+100	13F-HR Timeline
Greenfield Savings Bank	4,988	$4.97M	2.12%	+6	13F-HR Timeline
Arvest Bank Trust Division	4,987	$4.97M	0.27%	-34	13F-HR Timeline
SCHWARZ DYGOS WHEELER INVESTMENT ADVISO…	4,958	$4.94M	1.03%	-77	13F-HR Timeline
Financial Engines Advisors L.L.C.	4,941	$4.92M	0.01%	+241	13F-HR Timeline
Vickerman Investment Advisors, Inc.	4,937	$4.92M	1.03%	-56	13F-HR Timeline
Alessandra Capital Management, LLC	4,919	$4.9M	4.18%	+189	13F-HR Timeline
Investment Research & Advisory Group, I…	4,898	$4.89M	1.71%	+48	13F-HR Timeline
PW Nova Financial Services LLC	4,907	$4.89M	1.23%	+3,596	13F-HR Timeline
Global Wealth Management Investment Adv…	4,901	$4.88M	0.76%	+368	13F-HR Timeline
Pinnacle Bancorp, Inc.	4,897	$4.88M	1.44%	+7	13F-HR Timeline
PGIM Custom Harvest LLCin group PGIM INVESTMENTS LLC	4,893	$4.88M	0.08%	-162	13F-HR Timeline Group
VIEWPOINT INVESTMENT PARTNERS CORP	4,550	$4.87M	2.26%	-150	13F-HR Timeline
GUARDIAN INVESTMENT MANAGEMENT	4,887	$4.87M	3.84%	0	13F-HR Timeline
Banco de Sabadell, S.A	4,875	$4.87M	3.23%	-171	13F-HR Timeline
BRADY FAMILY WEALTH, LLC	4,882	$4.86M	1.52%	+455	13F-HR Timeline
CEERA INVESTMENTS, LLC	4,879	$4.86M	2.13%	-471	13F-HR Timeline
FLAGSHIP HARBOR ADVISORS, LLC	4,869	$4.85M	0.21%	-164	13F-HR Timeline
National Philanthropic Trust	4,866	$4.85M	0.05%	-385	13F-HR Timeline
Gryphon Financial Partners LLC	4,858	$4.84M	0.51%	+299	13F-HR Timeline
Ashurst Perkins Coie Trust Co	4,847	$4.83M	0.93%	+83	13F-HR Timeline
Atlas Brown,Inc.	4,844	$4.83M	1.45%	+224	13F-HR Timeline
NVWM, LLC	4,834	$4.82M	1.07%	+495	13F-HR Timeline
Tempo Wealth, LLC	4,822	$4.81M	0.84%	+242	13F-HR Timeline
RW Investment Management LLC	4,816	$4.8M	0.46%		13F-HR Timeline
Concord Investment Counsel Inc.	4,805	$4.79M	1.61%	-43	13F-HR Timeline
Legato Capital Management LLC	4,799	$4.78M	0.44%	+409	13F-HR Timeline
Benin Management CORP	4,794	$4.78M	1.07%	0	13F-HR Timeline
Clear Street Group Inc.in group Clear Street Group Inc.	4,480	$4.78M	0.03%	-10,931	13F-HR Timeline Group
GRANDFIELD & DODD, LLC	4,778	$4.76M	0.27%	-42	13F-HR Timeline
SCHAPER BENZ & WISE INVESTMENT COUNSEL …	4,757	$4.74M	0.36%	+44	13F-HR Timeline
Jaffetilchin Investment Partners, LLC	4,752	$4.74M	0.28%	+4	13F-HR Timeline
WBH ADVISORY INC	4,742	$4.73M	0.35%	-219	13F-HR Timeline
LaSalle St. Investment Advisors, LLC	4,724	$4.71M	0.66%	-135	13F-HR Timeline
Schear Investment Advisers, LLC	4,701	$4.68M	2.07%	-101	13F-HR Timeline
TBH Global Asset Management, LLC	4,699	$4.68M	0.94%	-707	13F-HR Timeline
AMG National Trust Bank	4,697	$4.68M	0.1%	+141	13F-HR Timeline
SPIRIT OF AMERICA MANAGEMENT CORP/NY	4,681	$4.66M	0.92%	-1,025	13F-HR Timeline
Keating Financial Advisory Services, In…	4,681	$4.66M	0.75%	+34	13F-HR Timeline
Soltis Investment Advisors LLC	4,664	$4.65M	0.3%	+406	13F-HR Timeline
Modus Advisors, LLC	4,650	$4.63M	1.28%	+1,082	13F-HR Timeline
First Business Financial Services, Inc.	4,649	$4.63M	0.41%	+441	13F-HR Timeline
BLODGETT WEALTH ADVISORS, LLC	4,635	$4.62M	3.66%	-269	13F-HR Timeline
GARDNER RUSSO & QUINN LLC	4,624	$4.61M	0.05%	0	13F-HR Timeline
Alan B Lancz & Associates, Inc.	4,606	$4.59M	4.45%	-317	13F-HR Timeline
Blume Capital Management, Inc.	4,585	$4.57M	0.78%	-599	13F-HR Timeline
SUMITOMO LIFE INSURANCE CO	4,584	$4.57M	0.11%	+116	13F-HR Timeline
Huntleigh Advisors, Inc.	4,578	$4.56M	0.78%	+357	13F-HR Timeline
DAVIDSON TRUST CO	4,575	$4.56M	1.97%	-35	13F-HR Timeline
Cove Private Wealth, LLC	4,569	$4.55M	1.03%	+1,130	13F-HR Timeline
Parcion Private Wealth LLC	4,566	$4.55M	0.28%	-592	13F-HR Timeline
SageView Advisory Group, LLC	4,564	$4.55M	0.17%	-43	13F-HR Timeline
MWA Asset Management	4,559	$4.55M	2.49%	+304	13F-HR/A Timeline
MV CAPITAL MANAGEMENT, INC.	4,560	$4.54M	0.45%	+59	13F-HR Timeline
SFMG, LLC	4,558	$4.54M	0.31%	+1,133	13F-HR Timeline
Wellspring Financial Advisors, LLC	4,553	$4.54M	0.34%	-62	13F-HR Timeline
TFR Capital, LLC.	4,550	$4.53M	1.39%	-1,788	13F-HR Timeline
HBK INVESTMENTS L P	4,530	$4.51M	0.06%	new	13F-HR Timeline
one8zero8, LLC	4,525	$4.51M	1%	-25	13F-HR Timeline
Northwest & Ethical Investments L.P.	4,511	$4.5M	0.1%	+328	13F-HR Timeline
Freedom Day Solutions, LLC	4,513	$4.5M	1.21%	-94	13F-HR Timeline
First Pacific Financial	4,505	$4.49M	0.58%	-13	13F-HR Timeline
Martin Capital Advisors, LLP	4,505	$4.49M	2.83%	-55	13F-HR Timeline
Columbia Asset Management	4,503	$4.49M	0.85%	+32	13F-HR Timeline
OVERSEA-CHINESE BANKING Corp Ltdin group OVERSEA-CHINESE BANKING Corp …	4,502	$4.49M	0.13%	+1,983	13F-HR Timeline Group
Field & Main Bank	4,500	$4.48M	1.3%	-49	13F-HR Timeline
RDA Financial Network	4,487	$4.47M	1.12%	-19	13F-HR Timeline
Apella Capital, LLC	4,472	$4.47M	0.07%	+1,254	13F-HR Timeline
Premier Path Wealth Partners, LLC	4,481	$4.47M	0.58%	+879	13F-HR Timeline
Asset Dedication, LLC	4,481	$4.46M	0.31%	-841	13F-HR Timeline
GS Investments, Inc.	4,457	$4.44M	2.54%	-11	13F-HR Timeline
Lebenthal Global Advisors, LLCin group Lebenthal Global Advisors, LLC	4,444	$4.43M	0.64%	+755	13F-HR Timeline Group
SHEETS SMITH WEALTH MANAGEMENT	4,441	$4.42M	0.5%	+206	13F-HR Timeline
Skye Global Management LP	4,400	$4.38M	0.09%	0	13F-HR Timeline
RED CEDAR INVESTMENT MANAGEMENT, LLC	4,399	$4.38M	0.45%	-32	13F-HR Timeline
Cypress Capital Management LLC (WY)	4,398	$4.38M	4.05%	-129	13F-HR Timeline
BANK OZK	4,394	$4.38M	1.54%	+118	13F-HR Timeline
J. Derek Lewis & Associates Inc.	4,386	$4.37M	0.98%	-165	13F-HR/A Timeline
Prosperitas Financial LLC	4,383	$4.37M	1.63%	+171	13F-HR Timeline
Fairvoy Private Wealth, LLC	4,382	$4.37M	1.04%	-102	13F-HR Timeline
Moss Adams Wealth Advisors LLC	4,358	$4.34M	0.32%	+241	13F-HR Timeline
Harvest Investment Services, LLC	4,355	$4.34M	0.79%	-923	13F-HR Timeline
BOK Financial Private Wealth, Inc.	4,351	$4.34M	0.26%	-221	13F-HR Timeline

Events

Wilcox William Richard sold 1,100 COST shares on 2026-10-13, Form 4 filed 2026-10-14. 0000909832-26-000098
Accepted 2026-10-14 23:00:30 UTC, ingested 2026-10-14 23:01:45 UTC