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
PETTYJOHN, WOOD & WHITE, INC	1,003	$999K	0.16%	0	13F-HR Timeline
PACES FERRY WEALTH ADVISORS, LLC	1,002	$998K	0.42%	+1	13F-HR Timeline
MARIPAU WEALTH MANAGEMENT LLC	1,002	$998K	0.44%	+322	13F-HR/A Timeline
QUATTRO FINANCIAL ADVISORS LLC	1,000	$996K	0.3%	0	13F-HR Timeline
Parvin Asset Management, LLC	1,000	$996K	0.73%	0	13F-HR Timeline
Rubicon Advisors, GP	1,000	$996K	0.87%	-14	13F-HR Timeline
Investmark Advisory Group LLC	999	$996K	0.43%	-21	13F-HR Timeline
EVERPAR ADVISORS LLC	997	$993K	0.34%	+364	13F-HR Timeline
Atala Financial Inc	993	$993K	0.67%	+12	13F-HR Timeline
MQS Management LLC	992	$988K	0.67%	-53	13F-HR Timeline
Altus Wealth Group LLC	992	$988K	0.41%	+9	13F-HR Timeline
1015 Capital Partners, LLC	992	$988K	0.96%	+10	13F-HR Timeline
Pettinga Financial Advisors LLC	991	$988K	0.19%	-9	13F-HR Timeline
Next Level Wealth Planning, LLC	987	$983K	0.51%	+444	13F-HR Timeline
IBEX WEALTH ADVISORS	986	$982K	0.09%	new	13F-HR Timeline
KPP Advisory Services LLC	985	$982K	0.14%	-47	13F-HR Timeline
Balefire, LLC	985	$982K	0.18%	+56	13F-HR Timeline
WESTPAC BANKING CORPin group WESTPAC BANKING CORP	985	$981K	0.07%	new	13F-HR Timeline Group
Nolet Wealth Management, LLC	984	$981K	0.56%	+20	13F-HR Timeline
STEVENS CAPITAL MANAGEMENT LP	984	$980K	0.15%	-4,877	13F-HR Timeline
Capital Square, LLC	968	$979K	0.45%	+159	13F-HR Timeline
SANDLER CAPITAL MANAGEMENT	982	$978K	0.66%	-518	13F-HR Timeline
Pacific Capital Wealth Advisors, Inc.	982	$978K	0.16%	-8	13F-HR Timeline
Accretive Wealth Partners, LLC	982	$978K	0.28%	+474	13F-HR Timeline
Pinion Investment Advisors, LLC	979	$976K	0.23%	-151	13F-HR Timeline
Calydon Capital	978	$975K	0.16%	-1	13F-HR Timeline
Integrity Financial Corp /WA	977	$974K	0.48%	-42	13F-HR Timeline
Tanager Wealth Management LLP	977	$974K	0.09%	+16	13F-HR Timeline
VALLEY WEALTH MANAGERS, INC.in group VALLEY WEALTH MANAGERS, INC.	975	$972K	0.06%	-37	13F-HR Timeline Group
Cetera Trust Company, N.A	974	$971K	0.55%	-25	13F-HR Timeline
NORTH DALLAS BANK & TRUST CO	970	$967K	0.65%	0	13F-HR Timeline
RED LIGHTHOUSE INVESTMENT MANAGEMENT, L…	967	$964K	0.33%	new	13F-HR Timeline
Waycross Investment Management Co	967	$963K	0.92%	+1	13F-HR Timeline
Clark Asset Management, LLC	966	$963K	0.09%	+174	13F-HR Timeline
Mendel Capital Management LLC	966	$962K	0.48%		13F-HR Timeline
Magnetar Financial LLCin group Magnetar Financial LLC	965	$962K	0.01%	-205	13F-HR Timeline Group
Trinity Financial Advisors LLC	965	$962K	0.27%	-4	13F-HR Timeline
Morton Capital Management LLC/CA	964	$961K	0.14%	-162	13F-HR Timeline
Goldenstone Wealth Management LLC	964	$961K	0.7%	+8	13F-HR Timeline
Monument Capital Management	964	$961K	0.24%	+163	13F-HR Timeline
MFA Wealth Services	963	$959K	0.64%	-8	13F-HR Timeline
Mraz, Amerine & Associates, Inc.	962	$959K	0.14%	0	13F-HR Timeline
UNIQUE WEALTH, LLC	961	$958K	0.13%	+77	13F-HR Timeline
LJI Wealth Management, LLC	961	$958K	0.15%	0	13F-HR Timeline
Trust Co of the South	961	$958K	0.15%	+224	13F-HR Timeline
Bear Mountain Capital, Inc.	959	$957K	0.29%	-43	13F-HR Timeline
MERIDIAN INVESTMENT COUNSEL INC.	960	$957K	0.23%	+21	13F-HR Timeline
Farmers National Bank	959	$956K	0.21%	-19	13F-HR Timeline
AFFINITY WEALTH MANAGEMENT LLC	959	$955K	0.14%	+27	13F-HR Timeline
Pacifica Partners Inc.	958	$955K	0.32%	0	13F-HR Timeline
Breakwater Capital Group	958	$955K	0.13%	+5	13F-HR Timeline
Morey & Quinn Wealth Partners, LLC	957	$954K	0.68%	+98	13F-HR Timeline
Veery Capital, LLC	956	$953K	0.29%	0	13F-HR Timeline
Advisory Advocates, LLC	955	$952K	0.97%	+21	13F-HR Timeline
Advocate Investing Services LLC	955	$952K	0.81%	0	13F-HR Timeline
WORLD EQUITY GROUP, INC.	955	$951K	0.25%	+143	13F-HR Timeline
INSPIRION WEALTH ADVISORS, LLC	954	$951K	0.12%	+20	13F-HR Timeline
Cardinal Strategic Wealth Guidance	954	$951K	0.25%	-1	13F-HR Timeline
Brown Miller Wealth Management, LLC	954	$950K	0.27%	0	13F-HR Timeline
Arrowroot Family Office, LLC	952	$949K	0.31%	+15	13F-HR/A Timeline
Tradewinds, LLC.	935	$946K	0.3%	0	13F-HR Timeline
Kera Capital Partners, Inc.	947	$944K	0.12%	+274	13F-HR Timeline
Alphadyne Asset Management LP	946	$943K	0.12%	new	13F-HR Timeline
Beta Wealth Group, Inc.	945	$942K	0.39%	+132	13F-HR Timeline
Box Hill Private Wealth LLC	945	$941K	0.93%	+2	13F-HR Timeline
UPTICK PARTNERS, LLC	945	$941K	0.19%	+9	13F-HR Timeline
FAIRVIEW CAPITAL INVESTMENT MANAGEMENT,…	943	$940K	0.05%	+82	13F-HR Timeline
Curbstone Financial Management Corp	942	$939K	0.18%	+30	13F-HR Timeline
WELLINGTON-ALTUS USA INC.	1,003	$938K	0.55%	-160	13F-HR Timeline
Archer Investment Corp	941	$938K	0.2%	-188	13F-HR Timeline
Gradient Capital Advisors, LLC	941	$937K	0.24%	+2	13F-HR Timeline
Spartan Planning & Wealth Management	939	$935K	0.69%	new	13F-HR Timeline
SMITH, MOORE & CO.	938	$935K	0.07%	-1	13F-HR Timeline
Long Road Investment Counsel, LLC	938	$935K	0.37%	0	13F-HR Timeline
McLean Asset Management Corp	938	$935K	0.16%	+19	13F-HR Timeline
One Charles Private Wealth Services, LLC	935	$932K	0.23%	+7	13F-HR Timeline
Conestoga Capital Advisors, LLC	935	$932K	0.02%	0	13F-HR Timeline
FIRST FINANCIAL CORP /IN/	934	$931K	0.37%	0	13F-HR Timeline
Lifeworks Advisors, LLC	931	$928K	0.12%	+7	13F-HR Timeline
Polymer Capital Management (US) LLC	930	$927K	0.14%	+424	13F-HR Timeline
Millstone Evans Group, LLC	928	$925K	0.55%	0	13F-HR Timeline
LIBERTY WEALTH MANAGEMENT LLC	927	$924K	0.12%	-119	13F-HR Timeline
Helium Advisors LLC	926	$922K	0.88%	-1	13F-HR Timeline
Victrix Investment Advisors	925	$922K	0.33%	+89	13F-HR Timeline
Permanent Capital Management, LP	907	$920K	0.14%	+28	13F-HR Timeline
Syverson Strege & Co	923	$920K	0.22%	-54	13F-HR Timeline
Stamos Capital Partners, L.P.	923	$920K	0.14%	-134	13F-HR Timeline
Bridgewealth Advisory Group, LLC	921	$918K	0.19%	-14	13F-HR Timeline
Sherman Asset Management, Inc.	921	$918K	0.84%	+3	13F-HR Timeline
Provident Investment Management, Inc.	920	$917K	0.09%	0	13F-HR Timeline
GFS Advisors, LLC	919	$916K	0.12%	-53	13F-HR/A Timeline
IRONWOOD INVESTMENT MANAGEMENT LLC	919	$916K	0.38%	new	13F-HR Timeline
GenTrust, LLC	918	$915K	0.04%	new	13F-HR Timeline
SLT Holdings LLC	918	$914K	0.65%	+56	13F-HR Timeline
Live Oak Private Wealth LLC	916	$913K	0.13%	-10	13F-HR Timeline
Pacific Center for Financial Services	915	$912K	0.23%	-34	13F-HR Timeline
Verity & Verity, LLC	915	$912K	0.07%	-706	13F-HR Timeline
Blue Zone Wealth Advisors, LLC	914	$911K	0.19%	-79	13F-HR Timeline
GWN SECURITIES INC.	912	$910K	0.17%	+36	13F-HR Timeline
Mascoma Wealth Management LLC	912	$909K	0.19%	-18	13F-HR Timeline
MINDSET WEALTH MANAGEMENT, LLC	912	$909K	0.24%	+100	13F-HR Timeline
Courage Miller Partners, LLC	910	$907K	0.26%	0	13F-HR Timeline
Menard Financial Group LLC	906	$903K	0.63%	+6	13F-HR Timeline
Summit Financial Wealth Advisors, LLC	906	$903K	0.13%	+130	13F-HR Timeline
Beacon Bank & Trust	906	$903K	0.19%	-21	13F-HR Timeline
Souders Financial Advisors	902	$899K	0.1%	+45	13F-HR Timeline
TPG Advisors LLC	902	$899K	0.56%	-15	13F-HR Timeline
Argyle Capital Partners, LLC	902	$899K	0.65%	-50	13F-HR Timeline
PEOPLES BANK /OH	901	$898K	0.55%	-14	13F-HR Timeline
PAYDEN & RYGEL	900	$897K	0.07%	0	13F-HR Timeline
Ranch Capital Advisors Inc.	897	$893K	0.33%	+20	13F-HR Timeline
American Capital Advisory, LLC	895	$892K	0.36%	+8	13F-HR Timeline
Northwest Wealth Advisors, LLC	894	$891K	0.64%	+33	13F-HR Timeline
OPTIMA CAPITAL LLC	893	$890K	0.41%	-303	13F-HR Timeline
PATRIOT INVESTMENT MANAGEMENT GROUP, IN…	891	$888K	0.06%	+45	13F-HR Timeline
Atlas Private Wealth Advisors	886	$883K	0.21%	-148	13F-HR Timeline
FULCRUM WEALTH ADVISORS, LLC	886	$883K	0.73%	0	13F-HR Timeline
Clarendon Private LLC	886	$882K	0.68%	+135	13F-HR Timeline
Sierra Legacy Group	885	$882K	0.67%	0	13F-HR Timeline
Legacy Capital Wealth Partners, LLC	883	$880K	0.18%	+4	13F-HR Timeline
Pitcairn Wealth Advisors LLCin group PITCAIRN CO	1,020	$880K	0.08%	+29	13F-HR Timeline Group
Plum Street Advisors, LLC	882	$879K	0.3%	-4	13F-HR Timeline
HOURGLASS CAPITAL, LLC	880	$877K	0.18%	+444	13F-HR Timeline
Canal Capital Management, LLC	880	$877K	0.12%	-6	13F-HR Timeline
Altiora Financial Group, LLC	879	$876K	0.14%	+4	13F-HR Timeline
Wall Street Financial Group, Inc.	878	$875K	0.52%	-127	13F-HR Timeline
Tactive Advisors, LLC	876	$873K	0.25%	+58	13F-HR Timeline
WEALTH EFFECTS LLC	874	$871K	0.31%	+10	13F-HR Timeline
M3 Advisory Group, LLC	872	$868K	0.54%	+41	13F-HR Timeline
Annis Gardner Whiting Capital Advisors,…	870	$867K	0.14%	+64	13F-HR Timeline
CAPITAL FINANCIAL GROUP INC\CO\ /ADV	869	$866K	0.48%	0	13F-HR Timeline
Centiva Capital, LP	868	$865K	0.04%	-4,566	13F-HR Timeline
Hara Capital LLC	868	$865K	0.43%	-800	13F-HR Timeline
ARBOR CAPITAL MANAGEMENT INC /ADV	881	$864K	0.7%	-54	13F-HR Timeline
RF&L WEALTH MANAGEMENT, LLC	865	$862K	0.65%	-3,000	13F-HR Timeline
Avanza Fonder AB	865	$862K	0.02%	-71	13F-HR Timeline
Affinity Capital Advisors, LLC	864	$861K	0.12%	+84	13F-HR Timeline
Alchemi Wealth, LLC	863	$861K	0.48%	+5	13F-HR Timeline
New Capital Management LP	862	$859K	0.21%	0	13F-HR Timeline
Weil Company, Inc.	862	$859K	0.19%	+20	13F-HR Timeline
Elevated Capital Advisors, LLC	862	$859K	0.22%	-248	13F-HR Timeline
Oak Thistle LLC	857	$854K	0.08%	new	13F-HR Timeline
1900 WEALTH MANAGEMENT LLC	855	$852K	0.05%	+296	13F-HR Timeline
Councilmark Asset Management, LLC	855	$852K	0.49%	0	13F-HR Timeline
Solidarity Wealth, LLC	854	$851K	0.16%	-16	13F-HR Timeline
MONARCH CAPITAL MANAGEMENT INC	853	$850K	0.21%	0	13F-HR Timeline
Symphony Financial Services, Inc.	853	$850K	0.44%	-2	13F-HR Timeline
Altura Wealth Advisors Inc.	852	$849K	0.37%	new	13F-HR Timeline
CHICKASAW CAPITAL MANAGEMENT LLC	852	$849K	0.03%	+6	13F-HR Timeline
Hidden Cove Wealth Management, LLC	852	$849K	0.55%	+354	13F-HR Timeline
Wealthspire Retirement, LLC	852	$849K	0.05%	+5	13F-HR Timeline
Vertrix Wealth Management, LLC	851	$848K	0.31%		13F-HR Timeline
KEATING INVESTMENT COUNSELORS INC	850	$847K	0.21%	-285	13F-HR Timeline
Poehling Capital Management, INC.	850	$847K	0.18%	+127	13F-HR Timeline
Talon Private Wealth, LLC	849	$846K	0.11%		13F-HR Timeline
EAGLE HARBOR ASSET MANAGEMENT INC /ADV	847	$844K	0.72%	-36	13F-HR Timeline
LongView Wealth Management	865	$844K	0.21%	-160	13F-HR Timeline
Garden State Investment Advisory Servic…	844	$843K	0.2%	-35	13F-HR Timeline
M.E. ALLISON & CO., INC.	846	$843K	0.56%	+1	13F-HR Timeline
Symmetry Partners, LLC	844	$841K	0.05%	+48	13F-HR Timeline
Drucker Wealth 3.0, LLC	844	$841K	0.15%	+189	13F-HR Timeline
Bannerstone Capital Management, LLC	843	$840K	0.78%	-26	13F-HR Timeline
Old Port Advisors	843	$840K	0.19%	+122	13F-HR Timeline
BEACON FINANCIAL GROUP	843	$840K	0.08%	+81	13F-HR Timeline
LEIGH BALDWIN & CO., LLC	842	$839K	0.54%	+64	13F-HR Timeline
Coquina Private Wealth LLC	841	$838K	0.67%	-659	13F-HR Timeline
Miller Financial Services LLC	841	$838K	0.93%	+4	13F-HR Timeline
Stegent Equity Advisors, Inc.	839	$836K	0.71%	new	13F-HR Timeline
Indivisible Partners	838	$835K	0.07%	-57	13F-HR Timeline
STEEL GROVE CAPITAL ADVISORS, LLC	838	$835K	0.09%	+25	13F-HR Timeline
BNB Wealth Management, LLC	837	$835K	0.54%	0	13F-HR Timeline
Key Financial Inc	834	$831K	0.15%	+115	13F-HR Timeline
Strategic Family Wealth Counselors, L.L…	833	$830K	0.22%	-464	13F-HR Timeline
Bill Few Associates, Inc.	833	$830K	0.2%	-16	13F-HR Timeline
Darden Wealth Group Inc	830	$827K	0.42%	-1	13F-HR Timeline
Exchange Bank	830	$827K	0.57%	-22	13F-HR Timeline
Braeburn Wealth Management LLC	829	$826K	0.47%	+56	13F-HR Timeline
Evanson Asset Management, LLC	828	$825K	0.04%	-17	13F-HR Timeline
Financial Security Advisor, Inc.	826	$823K	0.15%	+9	13F-HR Timeline
Aquire Wealth Advisors, LLC	826	$823K	0.22%	new	13F-HR Timeline
Kaizen Financial Strategies	833	$823K	0.35%	-194	13F-HR Timeline
Verum Partners LLC	825	$822K	0.16%	+136	13F-HR Timeline
Bigelow Investment Advisors, LLC	824	$821K	0.33%	+4	13F-HR Timeline
Cadent Capital Advisors, LLC	824	$821K	0.22%	+1	13F-HR Timeline
M. Kraus & Co	823	$820K	0.24%	+3	13F-HR Timeline
Washington Trust Advisors, Inc.	822	$819K	0.07%	-96	13F-HR Timeline
Black Diamond Financial, LLC	820	$817K	0.09%	-3	13F-HR Timeline
Pekin Hardy Strauss, Inc.	820	$817K	0.09%	0	13F-HR Timeline
Womack Financial LLC	820	$817K	0.6%	-10	13F-HR Timeline
McMillan Office, Inc.	820	$817K	0.1%	0	13F-HR Timeline
PLANNING ALTERNATIVES LTD /ADV	819	$816K	0.11%	+576	13F-HR Timeline
Gladius Capital Management LP	819	$816K	0.62%	-932	13F-HR Timeline
VISTA INVESTMENT PARTNERS LLC	819	$816K	0.22%	+1	13F-HR Timeline
Sandbox Financial Partners, LLC	817	$814K	0.23%	-9	13F-HR Timeline
Centerpoint Advisory Group	816	$813K	0.61%	-10	13F-HR Timeline
Princeton Global Asset Management LLC	816	$813K	0.13%	-19	13F-HR Timeline
James J. Burns & Company, LLC	815	$812K	0.11%	0	13F-HR Timeline
Avantra Family Wealth, Inc.	815	$812K	0.6%	-50	13F-HR Timeline
Shade Tree Advisors LLC	814	$811K	0.58%	+1	13F-HR Timeline
MN Wealth Advisors, LLC	814	$811K	0.39%	+53	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