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
Catalina Capital Group, LLC	644	$642K	0.39%	+9	13F-HR Timeline
Gen-Wealth Partners Inc	643	$641K	0.2%	-457	13F-HR Timeline
White Knight Strategic Wealth Advisors,…	642	$640K	0.54%	-238	13F-HR Timeline
Gibson Capital, LLC	642	$640K	0.12%	-44	13F-HR Timeline
Financial Management Professionals, Inc.	642	$640K	0.07%	-70	13F-HR Timeline
Sterling Financial Planning, Inc.	641	$639K	0.19%	+115	13F-HR Timeline
Colter Lewis Investment Partners LLC	641	$639K	0.6%	-52	13F-HR Timeline
Taylor Financial Group, Inc.	641	$639K	0.39%	0	13F-HR Timeline
Integrity Advisory Solutions, LLC	640	$638K	0.08%	+77	13F-HR Timeline
WESPAC Advisors, LLC	640	$638K	0.35%	0	13F-HR Timeline
WILLNER & HELLER, LLC	639	$637K	0.47%	+3	13F-HR Timeline
Elefante Mark B	638	$636K	0.35%	0	13F-HR Timeline
Arlington Trust Co LLCin group Arlington Trust Co LLC	638	$636K	0.06%	+118	13F-HR Timeline Group
Holt Capital Advisors, L.L.C. dba Holt …	637	$635K	0.09%	0	13F-HR Timeline
MOULTON WEALTH MANAGEMENT, INC	630	$635K	0.43%	+201	13F-HR Timeline
VIRGINIA WEALTH MANAGEMENT GROUP, INC.	636	$634K	0.34%	+6	13F-HR Timeline
Three Bridge Wealth Advisors, LLC	636	$634K	0.17%	+93	13F-HR Timeline
OPTIMIZE FINANCIAL INC.	636	$634K	0.31%	+7	13F-HR Timeline
Altrafin AG	634	$632K	0.22%	-20	13F-HR Timeline
LAVELLE CAPITAL LP	633	$631K	0.39%	-251	13F-HR Timeline
PHILADELPHIA TRUST CO	632	$630K	0.04%	0	13F-HR Timeline
Cascade Wealth Advisors, Inc	624	$630K	0.28%	0	13F-HR Timeline
HARVEY CAPITAL MANAGEMENT INC	631	$629K	0.14%	0	13F-HR TimelineThe filing omitted confidential holdings, a later amendment may add them.
Tributary Capital Management, LLC	630	$628K	0.06%	+60	13F-HR Timeline
FINANCIAL ADVISORY PARTNERS, LLC	630	$628K	0.18%	0	13F-HR Timeline
Planned Solutions, Inc.	629	$627K	0.21%	-95	13F-HR Timeline
Torray Investment Partners LLC	628	$626K	0.09%	0	13F-HR Timeline
Quattro Advisors LLC	628	$626K	0.54%	+145	13F-HR Timeline
BARNES PETTEY FINANCIAL ADVISORS, LLC	627	$625K	0.27%	+60	13F-HR Timeline
LANE BROTHERS & CO INC	626	$624K	0.45%	0	13F-HR Timeline
PENINSULA ASSET MANAGEMENT INC	625	$623K	0.32%	new	13F-HR Timeline
Truepoint, Inc.	624	$622K	0.01%	+1	13F-HR Timeline
Unified Investment Management	623	$621K	0.64%	-11	13F-HR Timeline
Towerpoint Wealth, LLC	623	$621K	0.25%	+1	13F-HR Timeline
Heritage Investment Group, Inc.	622	$620K	0.09%	+1	13F-HR Timeline
Foguth Wealth Management, LLC.	648	$620K	0.07%	+56	13F-HR Timeline
Wallace Hart LLC	621	$619K	0.85%	0	13F-HR Timeline
Curated Wealth Partners LLC	619	$617K	0.08%	+366	13F-HR Timeline
HORIZON BANCORP INC /IN/	618	$616K	0.3%	+13	13F-HR Timeline
GreatBanc Trust CO	618	$616K	0.43%	-6	13F-HR Timeline
PRUDENT INVESTORS NETWORK, INC.	618	$616K	0.13%	+122	13F-HR Timeline
Ulland Investment Advisors, LLC	617	$615K	0.53%	-20	13F-HR Timeline
Paradigm, Strategies in Wealth Manageme…	616	$614K	0.42%	0	13F-HR Timeline
Caitlin John, LLC	616	$614K	0.37%	-362	13F-HR Timeline
Ellenbecker Investment Group	615	$613K	0.08%	+22	13F-HR Timeline
August Group Capital Ltd	614	$611K	0.71%	+3	13F-HR Timeline
South Street Advisors LLC	611	$609K	0.09%	0	13F-HR Timeline
von Borstel & Associates, Inc.	611	$608K	0.14%	+4	13F-HR Timeline
Fulcrum Equity Management	610	$608K	0.59%	+7	13F-HR Timeline
Advisor Resource Council	610	$608K	0.24%	+21	13F-HR Timeline
WILKINS INVESTMENT COUNSEL INC	610	$608K	0.09%	0	13F-HR Timeline
MADDEN SECURITIES Corp	610	$608K	0.18%	0	13F-HR Timeline
Generate Investment Management Ltd	610	$608K	0.03%	new	13F-HR Timeline
TOBIAS FINANCIAL ADVISORS, INC.	608	$606K	0.08%	-138	13F-HR Timeline
Ameliora Wealth Management Ltd.	608	$606K	0.19%	-58	13F-HR Timeline
Hamilton Wealth, LLC	607	$605K	0.12%	-4	13F-HR/A Timeline
Phocas Financial Corp.	606	$604K	0.09%	0	13F-HR Timeline
Copia Wealth Management	605	$603K	0.41%	-63	13F-HR Timeline
Phillips Wealth Planners LLC	602	$602K	0.45%	-8	13F-HR Timeline
SUMMIT WEALTH & RETIREMENT PLANNING, IN…	603	$601K	0.14%	-16	13F-HR Timeline
Tannin Capital LLC	601	$599K	0.43%	+58	13F-HR Timeline
McGlone Suttner Wealth Management, Inc.	600	$598K	0.08%	+15	13F-HR Timeline
AR ASSET MANAGEMENT INC	600	$598K	0.12%	0	13F-HR Timeline
Pictet North America Advisors SA	600	$598K	0.06%	-51	13F-HR Timeline
Brandywine Financial Group	600	$598K	0.51%	-50	13F-HR Timeline
Richmond Investment Services, LLC	600	$598K	0.1%	+64	13F-HR Timeline
Fonville Wealth Management LLC	598	$596K	0.11%	+80	13F-HR Timeline
Boomfish Wealth Group, LLC	597	$595K	0.32%	-98	13F-HR Timeline
Turning Point Benefit Group, Inc.	634	$592K	0.38%	0	13F-HR Timeline
Accel Wealth Management	594	$592K	0.15%	+12	13F-HR Timeline
Foundation Wealth Management, LLC	593	$591K	0.4%	-98	13F-HR Timeline
Paradigm Capital Management, LLC/NV	592	$590K	0.54%	-5	13F-HR Timeline
LeConte Wealth Management, LLC	592	$590K	0.38%	+136	13F-HR Timeline
McLaughlin Asset Management, Inc.	591	$589K	0.56%	-7	13F-HR Timeline
CONSILIO WEALTH ADVISORS, LLC	591	$589K	0.17%	+51	13F-HR Timeline
Strategic Financial Concepts, LLC	591	$589K	0.15%	new	13F-HR Timeline
Integris Wealth Management, LLC	590	$588K	0.14%	-12	13F-HR Timeline
ADE, LLC	589	$587K	0.28%	0	13F-HR Timeline
First Fiduciary Investment Counsel, Inc.	587	$585K	0.12%	-67	13F-HR Timeline
Paladin Wealth, LLC	587	$585K	0.4%	-98	13F-HR Timeline
ALKEME WEALTH, LLC	587	$585K	0.24%	0	13F-HR Timeline
Veracity Capital LLC	586	$584K	0.21%	-100	13F-HR Timeline
KELLEHER FINANCIAL ADVISORS	586	$583K	0.15%	0	13F-HR Timeline
CULBERTSON A N & CO INC	585	$583K	0.08%	-85	13F-HR Timeline
Pathfinder Wealth Consulting, Inc.	585	$583K	0.38%	+2	13F-HR Timeline
Davidson Kahn Capital Management, LLC	584	$582K	0.31%	-40	13F-HR Timeline
Proactive Wealth Strategies LLC	581	$581K	0.11%	+343	13F-HR Timeline
PARADIGM ASSET MANAGEMENT CO LLC	581	$579K	0.14%	0	13F-HR Timeline
Deseret Mutual Benefit Administrators	580	$578K	0.2%	-247	13F-HR Timeline
Runnymede Capital Advisors, Inc.	579	$577K	0.5%	-4,681	13F-HR Timeline
Stonebridge Financial Group, LLC / MO	579	$577K	0.49%	+11	13F-HR Timeline
ELEVATUS WELATH MANAGEMENT	579	$577K	0.3%	+3	13F-HR Timeline
Innovative Asset Advisors Group, LLC	578	$576K	0.33%		13F-HR Timeline
GW&K Investment Management, LLC	578	$576K	0.01%	+133	13F-HR Timeline
Vertex Planning Partners, LLC	578	$576K	0.11%	-4	13F-HR Timeline
Navis Wealth Advisors, LLC	577	$575K	0.29%	-68	13F-HR Timeline
Community Bank & Trust, Waco, Texas	577	$575K	0.11%	-14	13F-HR Timeline
First Financial Bankshares Inc	577	$575K	0.01%	+37	13F-HR Timeline
STOLZ & ASSOCIATES, PS	582	$575K	0.4%	-800	13F-HR Timeline
MONOGRAPH WEALTH ADVISORS, LLC	576	$574K	0.05%	-691	13F-HR Timeline
Goldstein Advisors, LLC	574	$572K	0.06%	-32	13F-HR Timeline
Raleigh Capital Management Inc.	572	$570K	0.2%	+48	13F-HR Timeline
ATLas Financial Planning LLC	572	$570K	0.51%	new	13F-HR Timeline
Westend Capital Management, LLC	572	$570K	0.17%	+6	13F-HR Timeline
Creative Capital Management Investments…	572	$570K	0.16%	-9	13F-HR Timeline
Millennium Capital Advisors, LLC	572	$569K	0.35%	0	13F-HR Timeline
BAYBAN	571	$569K	0.49%	+169	13F-HR Timeline
Allen Mooney & Barnes Investment Adviso…	571	$569K	0.08%	0	13F-HR Timeline
Convergence Investment Partners, LLC	570	$568K	0.09%	-29	13F-HR Timeline
Rossby Financial, LCC	569	$567K	0.12%	+194	13F-HR Timeline
Warther Private Wealth, LLC	568	$566K	0.13%	-114	13F-HR Timeline
SEVEN MILE ADVISORY	568	$566K	0.41%	-56	13F-HR Timeline
Sulzberger Capital Advisors, Inc.	568	$566K	0.58%	+20	13F-HR Timeline
Bouchey Financial Group, Ltd.	547	$565K	0.04%	+148	13F-HR Timeline
Lakeshore Financial Planning, Inc.	566	$564K	0.2%	0	13F-HR Timeline
PENNSYLVANIA CAPITAL MANAGEMENT INC /ADV	565	$563K	0.16%	0	13F-HR Timeline
Dickmeyer Boyce Financial Management, I…	564	$562K	0.33%		13F-HR Timeline
Acorn Wealth Advisors, LLC	564	$562K	0.16%	+2	13F-HR Timeline
Destiny Wealth Partners, LLC	563	$561K	0.06%	+3	13F-HR Timeline
Gunderson Capital Management LLC	562	$560K	0.23%	+102	13F-HR Timeline
Financial Advisors Network, Inc.	562	$560K	0.08%	-259	13F-HR Timeline
Farrell Financial LLC	562	$560K	0.33%	+42	13F-HR Timeline
Archvest Wealth Advisors, Inc.	561	$559K	0.36%	+29	13F-HR Timeline
Alaethes Wealth, LLC	561	$559K	0.16%	0	13F-HR Timeline
Legend Capital Advisors LLC	561	$559K	0.35%	0	13F-HR Timeline
Sage Mountain Advisors LLC	560	$558K	0.04%	-2,354	13F-HR Timeline
Delta Investment Management, LLC	560	$558K	0.1%	+11	13F-HR Timeline
MATRIX ASSET ADVISORS INC/NY	559	$557K	0.05%	-4	13F-HR Timeline
Concorde Asset Management, LLC	558	$556K	0.27%	-265	13F-HR Timeline
Palogic Value Management, L.P.	558	$556K	0.24%	new	13F-HR Timeline
Cannon Advisors, Inc.	558	$556K	0.41%	+4	13F-HR Timeline
Richard P Slaughter Associates Inc	557	$555K	0.12%	+41	13F-HR Timeline
Investment Management Trust, LLC	557	$555K	0.54%		13F-HR Timeline
Rodgers & Associates, LTD	556	$554K	0.06%	-54	13F-HR Timeline
Saiph Capital, LLC	556	$554K	0.21%	-46	13F-HR Timeline
HANOVER ADVISORS INC	555	$553K	0.22%	new	13F-HR Timeline
Legacy Wealth Managment, LLC/IDin group Legacy Wealth Managment, LLC/…	555	$553K	0.28%	+52	13F-HR Timeline Group
Selective Wealth Management, Inc.	553	$552K	0.16%	-115	13F-HR Timeline
Marshall & Sterling Wealth Advisors Inc.	552	$550K	0.36%	-65	13F-HR Timeline
Triumph Capital Management	552	$550K	0.11%	-99	13F-HR Timeline
FOLGER NOLAN FLEMING DOUGLAS CAPITAL MA…	551	$549K	0.05%	+10	13F-HR Timeline
Torrey-Payne Wealth Management, LLC	551	$549K	0.5%	0	13F-HR Timeline
Tulsa Wealth Advisors, INC	550	$548K	0.1%	-86	13F-HR Timeline
KERR FINANCIAL PLANNING Corp	549	$547K	0.39%	+44	13F-HR/A Timeline
Narus Financial Partners, LLC	548	$546K	0.14%	+45	13F-HR Timeline
Meridian Financial Partners LLC	539	$546K	0.21%	+10	13F-HR Timeline
WINTON GROUP Ltdin group WINTON GROUP Ltd	548	$546K	0.02%	-16,023	13F-HR Timeline Group
Francis Financial, Inc.	547	$545K	0.1%	+34	13F-HR Timeline
ADKINS SEALE CAPITAL MANAGEMENT LLC	547	$545K	0.54%	0	13F-HR Timeline
CWS Financial Advisors, LLC	546	$544K	0.14%	+1	13F-HR Timeline
WINSLOW ASSET MANAGEMENT INC	546	$544K	0.11%	0	13F-HR Timeline
FSB PREMIER WEALTH MANAGEMENT, INC.	545	$543K	0.17%	-115	13F-HR Timeline
Warner Group LLC	544	$542K	0.35%	-41	13F-HR Timeline
TFB Advisors LLC	543	$541K	0.28%	-94	13F-HR Timeline
Alpha Zero LLC	543	$541K	0.27%	-12	13F-HR Timeline
BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC	541	$539K	0.08%	+173	13F-HR Timeline
Sageworth Trust Co	540	$538K	0.02%	+103	13F-HR Timeline
Miramar Capital, LLC	540	$538K	0.12%	0	13F-HR Timeline
RAHLFS CAPITAL, LLC	540	$538K	0.4%	0	13F-HR Timeline
PCG Wealth Advisors, LLC	539	$537K	0.14%	0	13F-HR Timeline
Harbor Group, Inc.	539	$537K	0.08%	+1	13F-HR Timeline
Cambridge Financial Group, LLC	539	$537K	0.18%	-43	13F-HR Timeline
InTrack Investment Management Inc	538	$536K	0.31%	new	13F-HR TimelineThe filing omitted confidential holdings, a later amendment may add them.
Walker Asset Management, LLC	538	$536K	0.29%	+9	13F-HR Timeline
SPG ADVISORS LLC	537	$535K	8.16%	-10	13F-HR Timeline
Dale Q Rice Investment Management Ltd	537	$535K	0.41%	0	13F-HR Timeline
Investment Advisory Group, LLC	536	$534K	0.14%	+78	13F-HR Timeline
DAGCO, INC.	535	$533K	0.12%	0	13F-HR Timeline
Smart Money Group LLC	535	$533K	0.15%	+19	13F-HR Timeline
Innova Wealth Partners	534	$532K	0.25%	-4	13F-HR Timeline
FIRST COMMUNITY TRUST NA	534	$532K	0.39%	0	13F-HR Timeline
Insight Inv LLC	533	$531K	0.29%	-9	13F-HR Timeline
Kingstone Capital Partners Texas, LLC	533	$531K	0.33%	+1	13F-HR Timeline
Unconventional Investor, LLC	532	$530K	0.25%	0	13F-HR Timeline
Opal Wealth Advisors, LLC	531	$529K	0.12%	+3	13F-HR Timeline
High Note Wealth, LLC	530	$528K	0.1%	+43	13F-HR Timeline
Mullaney, Keating & Wright, Inc.	530	$528K	0.29%	0	13F-HR Timeline
VALLEY NATIONAL ADVISERS INC	530	$528K	0.07%	+38	13F-HR Timeline
CoreFirst Bank & Trust	529	$527K	0.28%	-63	13F-HR Timeline
ACORN CREEK CAPITAL LLC	528	$526K	0.19%	+26	13F-HR Timeline
JMG Financial Group, Ltd.	528	$526K	0.01%	0	13F-HR Timeline
Wellington Grp LLC	525	$523K	0.16%	-204	13F-HR Timeline
XTX Topco Ltdin group XTX Topco Ltd	525	$523K	0.01%	-971	13F-HR Timeline Group
EIGHT 31 FINANCIAL, LLC	525	$523K	0.32%	0	13F-HR Timeline
Core Alternative Capital	522	$520K	0.15%	+74	13F-HR Timeline
Salomon & Ludwin, LLC	512	$520K	0.05%	+87	13F-HR Timeline
Elevation Advisory Partners LLC	535	$519K	0.48%		13F-HR Timeline
Asset Allocation & Management Company, …	520	$518K	0.19%	0	13F-HR Timeline
Alliance Wealth Advisors, LLC /UT	519	$517K	0.11%	+65	13F-HR Timeline
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC	519	$517K	0.01%	0	13F-HR Timeline Group
Wealth Advisors Northwest LLC	519	$517K	0.22%	-10	13F-HR Timeline
Geneva Partners, LLC	518	$516K	0.25%	+33	13F-HR Timeline
Integrity Wealth Solutions LLC	518	$516K	0.2%	+106	13F-HR Timeline
BAKER TILLY WEALTH MANAGEMENT, LLC	517	$515K	0.13%	+80	13F-HR Timeline
SSI INVESTMENT MANAGEMENT LLC	517	$515K	0.04%	0	13F-HR Timeline
ABNER HERRMAN & BROCK LLC	516	$514K	0.06%	-40	13F-HR Timeline
National Wealth Management Group, LLC	512	$510K	0.19%	-17	13F-HR Timeline
ARVEST INVESTMENTS, INC.	512	$510K	0.07%	+3	13F-HR Timeline
Capital Wealth Alliance, LLC	512	$510K	0.23%	-630	13F-HR Timeline
JACKSON THORNTON WEALTH MANAGEMENT, LLC	510	$509K	0.05%	+267	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