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
New World Advisors LLC	511	$509K	0.09%	+248	13F-HR/A Timeline
Core Wealth Advisors, Inc.	510	$508K	0.12%	+41	13F-HR Timeline
BCS Wealth Management	510	$508K	0.1%	-686	13F-HR Timeline
FreeGulliver LLC	510	$508K	0.21%	+64	13F-HR Timeline
W1M Asset Management Ltd	509	$507K	0.01%	-339	13F-HR Timeline
GSG Advisors LLC	509	$507K	0.13%	+27	13F-HR Timeline
Pathway Financial Advisors LLC	498	$505K	0.06%	0	13F-HR Timeline
Clay Northam Wealth Management, LLC	507	$505K	0.28%	0	13F-HR Timeline
Ankerstar Wealth, LLC	507	$505K	0.53%	0	13F-HR Timeline
Diversified Portfolios, Inc.	507	$505K	0.04%	+103	13F-HR Timeline
Omnia Family Wealth, LLC	507	$505K	0.16%	+143	13F-HR Timeline
MOTIVE WEALTH ADVISORS	506	$504K	0.24%	+43	13F-HR Timeline
Tumwater Wealth Management, LLC	505	$503K	0.2%	-13	13F-HR Timeline
CAMPBELL NEWMAN ASSET MANAGEMENT INC	505	$503K	0.04%	0	13F-HR Timeline
SOA Wealth Advisors, LLC.	17,769	$503K	0.09%	0	13F-HR Timeline
Windsor Capital Management, LLC	503	$501K	0.14%	0	13F-HR Timeline
KG Capital Management	502	$500K	0.36%	-1,764	13F-HR Timeline
Index Technologies Group LLC	502	$500K	0.54%	+14	13F-HR Timeline
Green Ridge Wealth Planning LLC	502	$500K	0.26%	-6	13F-HR Timeline
Financial Alternatives, Inc	501	$499K	0.27%	+40	13F-HR Timeline
Elite Financial, Inc.	501	$499K	0.22%	+11	13F-HR Timeline
AVENIR CORP	500	$498K	0.06%	0	13F-HR Timeline
VERITY Wealth Advisors	500	$498K	0.33%	0	13F-HR Timeline
Summa Corp.	500	$498K	0.21%	0	13F-HR Timeline
MRP Capital Investments, LLC	500	$498K	0.43%	-100	13F-HR Timeline
Ariadne Wealth Management, LP	500	$498K	0.22%	+163	13F-HR Timeline
WFA of San Diego, LLC	500	$498K	0.4%	-1,607	13F-HR Timeline
CAP Partners, LLC	499	$497K	0.28%	-9	13F-HR Timeline
COFG Advisors, LLC	497	$495K	0.12%	+16	13F-HR Timeline
FIRST AMERICAN BANK	496	$494K	0.03%	+30	13F-HR Timeline
Dynamic Wealth Strategies, LLC	496	$494K	0.29%	-104	13F-HR Timeline
CORNERSTONE ENTERPRISES, LLC	496	$494K	0.25%	0	13F-HR Timeline
Detalus Advisors, LLC	496	$494K	0.11%	-5	13F-HR Timeline
HARMONY ASSET MANAGEMENT LLC	495	$493K	0.15%	+131	13F-HR Timeline
MRA Advisory Group	495	$493K	0.2%	+3	13F-HR Timeline
OKABENA INVESTMENT SERVICES INC	493	$491K	0.09%	+6	13F-HR Timeline
ArrowMark Colorado Holdings LLC	493	$491K	0.01%	0	13F-HR Timeline
Schaeffer Financial LLC	493	$491K	0.41%	0	13F-HR Timeline
Greenhouse Wealth Management, LLC	492	$491K	0.3%	-9	13F-HR Timeline
Smith Salley Wealth Management	492	$491K	0.02%	-62	13F-HR Timeline
Team Financial Group, LLC	492	$490K	0.22%	+1	13F-HR Timeline
Five Pine Wealth Management	492	$490K	0.3%	+5	13F-HR Timeline
NORTHWEST WEALTH MANAGEMENT, LLC	491	$490K	0.07%	+63	13F-HR Timeline
Equity Wealth Partners, LLC	491	$490K	0.32%	+3	13F-HR Timeline
YARGER WEALTH STRATEGIES, LLC	491	$489K	0.2%	+16	13F-HR Timeline
Christensen, King & Associates Investme…	489	$488K	0.21%	+7	13F-HR Timeline
Ares Financial Consulting, LLC	489	$488K	0.38%	+114	13F-HR Timeline
Legacy Financial Strategies, LLC	489	$488K	0.09%	+86	13F-HR Timeline
MMA ASSET MANAGEMENT LLC	488	$487K	0.17%	new	13F-HR Timeline
Shulman DeMeo Asset Management LLC	488	$486K	0.1%	-7	13F-HR Timeline
Activest Wealth Management	488	$486K	0.09%	+6	13F-HR Timeline
Kidder Stephen W	487	$485K	0.14%	0	13F-HR Timeline
SAXON INTERESTS, INC.	487	$485K	0.17%	+21	13F-HR Timeline
Sonoma Allocations LLC	477	$483K	0.17%	+29	13F-HR Timeline
Greenline Wealth Management LLC	484	$483K	0.56%	+236	13F-HR Timeline
NewSquare Capital LLC	484	$482K	0.04%	new	13F-HR Timeline
ASL Financial, LLC	484	$482K	0.39%	+1	13F-HR Timeline
Aletheian Wealth Advisors LLC	483	$481K	0.23%		13F-HR Timeline
MORRIS FINANCIAL CONCEPTS, INC.	483	$481K	0.16%	-18	13F-HR Timeline
Clifford Group, LLC	482	$481K	0.37%	-23	13F-HR Timeline
Warwick Investment Management, Inc.	482	$480K	0.07%	+85	13F-HR Timeline
Signet Private Wealth LLC	481	$479K	0.46%	-43	13F-HR Timeline
Mountain Capital Investment Advisors In…	480	$479K	0.07%	-111	13F-HR Timeline
Johnson Bixby & Associates, LLC	481	$479K	0.06%	0	13F-HR Timeline
Dynasty Wealth Management, LLC	480	$479K	<0.01%	+101	13F-HR Timeline
SPWM Advisors LLC	468	$478K	0.42%	+3	13F-HR Timeline
Maia Wealth LLC	480	$478K	0.08%	+10	13F-HR Timeline
Lorne Steinberg Wealth Management Inc.	479	$477K	0.11%	+9	13F-HR Timeline
LIGHTHOUSE FINANCIAL SERVICES INC /ADV	489	$477K	0.11%	+1	13F-HR Timeline
AVITY INVESTMENT MANAGEMENT INC.	478	$476K	0.03%	-5	13F-HR Timeline
GUERRA PAN ADVISORS, LLC	478	$476K	0.29%	0	13F-HR Timeline
One Wealth Map LLC	469	$474K	0.23%	-177	13F-HR Timeline
Rather & Kittrell, Inc.	475	$473K	0.07%	+15	13F-HR Timeline
Next Level Private LLC	474	$473K	0.11%	+19	13F-HR Timeline
626 Financial, LLC	474	$472K	0.21%	+100	13F-HR Timeline
CAPE ANN SAVINGS BANK	474	$472K	0.24%	0	13F-HR Timeline
SKY-MOUNTAIN CAPITAL MANAGEMENT, INC.	473	$472K	0.34%	-77	13F-HR Timeline
SECURITY NATIONAL BANK OF SO DAK	473	$471K	0.23%	-38	13F-HR Timeline
Osbon Capital Management LLC	473	$471K	0.38%	+300	13F-HR Timeline
PFG Private Wealth Management, LLC	472	$470K	0.2%	+46	13F-HR Timeline
GoalVest Advisory LLC	472	$470K	0.09%	-19	13F-HR Timeline
Amplius Wealth Advisors, LLC	472	$470K	0.04%	+45	13F-HR Timeline
Triasima Portfolio Management inc.	472	$470K	0.07%	-3	13F-HR Timeline
Ring Mountain Capital, LLC	471	$470K	0.26%	+11	13F-HR Timeline
First Commonwealth Financial Corp /PA/in group First Commonwealth Financial …	471	$470K	0.07%	-738	13F-HR Timeline Group
CGC Financial Services, LLC	471	$470K	0.14%	0	13F-HR Timeline
Stewardship Advisors, LLC	471	$469K	0.11%	-1	13F-HR Timeline
JMN Financial LLC	470	$469K	0.46%	+65	13F-HR Timeline
BOURGEON CAPITAL MANAGEMENT LLC	470	$468K	0.08%	-17	13F-HR Timeline
Sharkey, Howes & Javer	468	$467K	0.06%	0	13F-HR Timeline
RESTON WEALTH MANAGEMENT LLC	468	$467K	0.14%	-8	13F-HR Timeline
FAIRFIELD, BUSH & CO.	468	$466K	0.26%	+130	13F-HR Timeline
Braun-Bostich & Associates Inc.	468	$466K	0.29%	+69	13F-HR Timeline
Bell Investment Advisors, Inc	467	$465K	0.07%	+28	13F-HR Timeline
Syntegra Private Wealth Group, LLC	467	$465K	0.04%	-101	13F-HR Timeline
LANDAAS & CO /WI /ADV	465	$463K	0.1%	0	13F-HR Timeline
Meritas Wealth Management, LLC	465	$463K	0.21%	0	13F-HR Timeline
Williams & Novak Wealth Management, LLC	464	$463K	0.35%	-215	13F-HR Timeline
Granite Bay Wealth Management, LLC	464	$462K	0.1%	+16	13F-HR Timeline
LOWE BROCKENBROUGH & CO INC	462	$460K	0.02%	-111	13F-HR Timeline
Affiance Financial, LLC	461	$460K	0.07%	+13	13F-HR Timeline
PLIMOTH TRUST CO LLC	461	$459K	0.1%	-47	13F-HR Timeline
Great Diamond Partners, LLC	461	$459K	0.09%	+6	13F-HR Timeline
RS CRUM INC.	459	$457K	0.09%	-14	13F-HR Timeline
WALLED LAKE PLANNING & WEALTH MANAGEMEN…	459	$457K	0.13%	0	13F-HR Timeline
Spectrum Wealth Advisory Group, LLC	459	$457K	0.17%	-54	13F-HR Timeline
Founders Capital Management	458	$456K	0.22%	0	13F-HR Timeline
Hamilton Point Investment Advisors, LLC	457	$456K	0.07%	0	13F-HR Timeline
OSTERWEIS CAPITAL MANAGEMENT INCin group OSTERWEIS CAPITAL MANAGEMENT …	455	$453K	0.02%	-34	13F-HR Timeline Group
Prosperity Bancshares Inc	455	$453K	0.36%	+111	13F-HR Timeline
FORM Wealth Advisors, LLC	454	$452K	0.05%	+212	13F-HR Timeline
Seaside Wealth Management, Inc.	453	$451K	0.13%	+11	13F-HR Timeline
PRECEDENT WEALTH PARTNERS, LLC	453	$451K	0.09%	-6	13F-HR Timeline
Perissos Private Wealth Management, LLC	452	$451K	0.39%	0	13F-HR Timeline
Foster Victor Wealth Advisors, LLC	462	$450K	0.03%	+1	13F-HR Timeline
Willis Johnson & Associates, Inc.	451	$449K	0.03%	-37	13F-HR Timeline
Three Magnolias Financial Advisors, LLC	451	$449K	0.29%	0	13F-HR Timeline
Piedmont Capital Management, LLC/NC	451	$449K	0.3%	-10	13F-HR Timeline
BIRCHBROOK, INC.	450	$448K	0.22%	-5	13F-HR Timeline
Quantum Private Wealth, LLC	450	$448K	0.14%	0	13F-HR Timeline
Vermillion Wealth Management, Inc.	449	$448K	0.18%	-90	13F-HR Timeline
Sachetta, LLC	449	$448K	0.24%	+322	13F-HR Timeline
PANORAMIC INVESTMENT ADVISORS, LLC	449	$447K	0.24%	0	13F-HR/A Timeline
Cottage Street Advisors LLC	447	$446K	0.19%	-1	13F-HR Timeline
BREAKTHRU ADVISORY SERVICES, LLC	443	$441K	0.71%	-13	13F-HR Timeline
Schrum Private Wealth Management LLC	443	$441K	0.34%	0	13F-HR Timeline
Fourth Dimension Wealth, LLC	443	$441K	0.17%	-33	13F-HR Timeline
Golden Reserve Retirement LLC	442	$440K	0.09%	-718	13F-HR Timeline
FOSTER & MOTLEY INC	442	$440K	0.02%	-20	13F-HR Timeline
FIRETHORN WEALTH PARTNERS, LLC	441	$440K	0.16%	+13	13F-HR Timeline
Private Wealth Asset Management, LLC	441	$439K	0.05%	-240	13F-HR Timeline
Global Wealth Strategies & Associates	440	$439K	0.11%	+55	13F-HR Timeline
Wealthquest Corp	440	$439K	0.03%	+122	13F-HR/A Timeline
Semus Wealth Partners LLC	440	$439K	0.25%	+1	13F-HR Timeline
Tripletail Wealth Management, LLC	432	$438K	0.6%	-16	13F-HR Timeline
ERn Financial, LLC	440	$438K	0.08%	-22	13F-HR Timeline
Novak & Powell Financial Services, Inc.	439	$438K	0.24%	-6	13F-HR Timeline
VestGen Investment Management	439	$437K	0.24%	+64	13F-HR Timeline
Garrett Wealth Advisory Group, LLC	439	$437K	0.08%	new	13F-HR Timeline
Scissortail Wealth Management, LLC	439	$437K	0.09%	0	13F-HR Timeline
New Covenant Trust Company, N.A.	439	$437K	0.39%	+116	13F-HR Timeline
Charter Capital Management, LLC\DE	438	$437K	0.22%	+3	13F-HR Timeline
Atlas Wealth LLC	438	$436K	0.13%	+70	13F-HR/A Timeline
Hickory Point Bank & Trust	438	$436K	0.29%	+2	13F-HR Timeline
HighMark Wealth Management LLC	438	$436K	0.18%	-26	13F-HR Timeline
WealthCollab, LLC	437	$435K	0.18%	-6,077	13F-HR Timeline
Cloud Capital Management, LLC	437	$435K	0.19%	+120	13F-HR Timeline
MLG Wealth Management DBA Pine Grove Fi…	436	$435K	0.05%	+9	13F-HR Timeline
PHILLIPS FINANCIAL MANAGEMENT, LLC	436	$435K	0.03%	+11	13F-HR Timeline
Stordahl Capital Management, Inc.	435	$433K	0.09%	0	13F-HR Timeline
Summit Financial Consulting LLC	435	$433K	0.31%	+25	13F-HR Timeline
Jacksonville Wealth Management, LLC	435	$433K	0.29%	+2	13F-HR Timeline
Stonebridge Capital Advisors LLC	435	$433K	0.03%	+25	13F-HR Timeline
Everest Private Wealth	434	$432K	0.22%	+78	13F-HR Timeline
ADVISORTRUST PARTNERS, LLC	433	$432K	0.18%	-368	13F-HR Timeline
FORTRESS PRIVATE LEDGER, LLC	433	$432K	0.14%	new	13F-HR Timeline
DDFG, Inc	432	$431K	0.09%	+74	13F-HR Timeline
Westshore Wealth, LLC	432	$430K	0.15%	-19	13F-HR Timeline
Tacita Capital Inc	432	$430K	0.25%	0	13F-HR Timeline
Baron Wealth Management LLC	431	$430K	0.13%	+169	13F-HR Timeline
Kondo Wealth Advisors, Inc.	430	$429K	0.16%	+97	13F-HR Timeline
Topsail Wealth Management, LLC	430	$428K	0.06%	+125	13F-HR Timeline
Wingate Wealth Advisors, Inc.	430	$428K	0.23%	-104	13F-HR Timeline
Signature Equity Partners, LLC	430	$428K	0.23%	-102	13F-HR Timeline
PENNINGTON PARTNERS & CO., LLC	428	$427K	0.15%	+1	13F-HR Timeline
BROWN WEALTH MANAGEMENT, LLC	428	$426K	0.11%	+103	13F-HR Timeline
Mason Investment Advisory Services, Inc.	427	$426K	0.02%	0	13F-HR Timeline
LifeGoal Investments, LLC	427	$426K	0.24%	new	13F-HR Timeline
Revisor Wealth Management LLC	426	$425K	0.12%	-20	13F-HR Timeline
Armor Investment Advisors, LLC	425	$424K	0.15%	0	13F-HR Timeline
Shay Capital LLC	425	$423K	0.06%	new	13F-HR Timeline
MPS Loria Financial Planners, LLC	425	$423K	0.11%	+36	13F-HR Timeline
S&T Bank/PA	424	$422K	0.16%	+38	13F-HR Timeline
UNITED BANK	424	$422K	0.05%	+22	13F-HR Timeline
CPC Advisors, LLC	424	$422K	0.07%	-2,669	13F-HR Timeline
DecisionMap Wealth Management, LLC	424	$422K	0.27%	+16	13F-HR Timeline
Latitude Advisors, LLC	424	$422K	0.19%	+49	13F-HR Timeline
Mayfair Advisory Group, LLC	423	$422K	0.15%	+90	13F-HR Timeline
Fearless Solutions, LLC dba Best Invest	423	$422K	0.25%	0	13F-HR Timeline
RENASANT BANK	422	$420K	0.3%	-206	13F-HR Timeline
Hopwood Financial Services, Inc.	422	$420K	0.28%	-45	13F-HR Timeline
RFG - Bristol Wealth Advisors, LLC	422	$420K	0.11%	+1	13F-HR Timeline
ENDEAVOR PRIVATE WEALTH, INC.	421	$419K	0.12%	-31	13F-HR Timeline
Intellectus Partners, LLC	421	$419K	0.09%	+33	13F-HR Timeline
George Kaiser Family Foundation	420	$419K	0.05%	0	13F-HR Timeline
Code Waechter LLC	420	$419K	0.25%	+8	13F-HR Timeline
Seascape Capital Management	419	$418K	0.12%	-1	13F-HR Timeline
Goodman Advisory Group, LLC	419	$418K	0.11%	0	13F-HR Timeline
SMART Wealth LLC	419	$417K	0.12%	+18	13F-HR Timeline
Bravias Capital Group, LLC	419	$417K	0.27%	-288	13F-HR Timeline
Elgethun Capital Management	417	$415K	0.07%	0	13F-HR Timeline
Northeast Financial Group, Inc.in group Northeast Financial Group, In…	415	$414K	0.11%	-21	13F-HR Timeline Group
Fund Advisors of America Inc/FL	415	$414K	0.42%	-30	13F-HR Timeline
Essential Investment Partners LLC	414	$413K	0.38%	0	13F-HR Timeline
CATHY PARETO & ASSOCIATES, INC	413	$412K	0.28%	+1	13F-HR Timeline
Cambridge Advisors Inc.	413	$412K	0.08%	0	13F-HR Timeline
Royal Palms Capital LLC	413	$412K	0.41%	new	13F-HR Timeline
Tanglewood Legacy Advisors, LLC	413	$412K	0.15%	+184	13F-HR Timeline
Aspiring Ventures, LLC	413	$411K	0.14%	+48	13F-HR Timeline
Baader Bank Aktiengesellschaft	451	$411K	0.04%	+109	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