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
BURR FINANCIAL SERVICES, LLC	316	$315K	0.25%	0	13F-HR Timeline
SAGE PRIVATE WEALTH GROUP, LLC	316	$315K	0.16%	+10	13F-HR Timeline
Soundwatch Capital LLC	315	$314K	0.04%	-27	13F-HR Timeline
Grange Capital, LLC	315	$314K	0.31%	-103	13F-HR Timeline
HughesLittle Investment Management Ltd.	315	$314K	0.06%	0	13F-HR Timeline
Kelly Financial Services LLC	314	$313K	0.08%	+55	13F-HR Timeline
Presper Financial Architects, LLC	314	$313K	0.19%	+16	13F-HR Timeline
Connective Capital Management, LLC	314	$313K	0.26%	new	13F-HR Timeline
Clarus Group, Inc.	314	$313K	0.11%	0	13F-HR Timeline
Stegner Investment Associates Inc.	314	$313K	0.17%	new	13F-HR Timeline
Lakeridge Wealth Management LLC	313	$312K	0.13%	+5	13F-HR Timeline
4WEALTH ADVISORS, INC.	313	$312K	0.27%	0	13F-HR Timeline
Kelman-Lazarov, Inc.	313	$312K	0.04%	new	13F-HR Timeline
Rare Wolf Capital LLC	313	$312K	0.2%	0	13F-HR Timeline
Verus Financial Partners, Inc.	315	$311K	0.03%	0	13F-HR Timeline
Sharp Wealth Advisory, LLC	310	$309K	0.15%	0	13F-HR Timeline
LWM Advisory Services, LLC	310	$309K	0.33%	-175	13F-HR Timeline
Stirlingshire Investments, Inc.	310	$309K	0.27%	+2	13F-HR Timeline
Talisman Wealth Advisors LLC	309	$308K	0.25%	-24	13F-HR Timeline
Commerce Advisors, LLC	309	$308K	0.26%		13F-HR Timeline
Brand Asset Management Group, Inc.	309	$308K	0.08%	new	13F-HR Timeline
Ameraudi Asset Management, Inc.	309	$308K	0.17%	0	13F-HR Timeline
Nordwand Advisors, LLC	309	$308K	0.05%	0	13F-HR Timeline
Capstone Wealth Management, LLC	309	$308K	0.21%	+8	13F-HR Timeline
Terril Brothers, Inc.	307	$306K	0.08%	new	13F-HR Timeline
Indie Asset Partners, LLC	307	$306K	0.35%	-7	13F-HR Timeline
waypoint wealth counsel	307	$306K	0.16%	-1,163	13F-HR Timeline
Peak Planning Group, LLC	307	$306K	0.08%	0	13F-HR Timeline
Downshift Financial, LLC	306	$305K	0.16%	new	13F-HR Timeline
Grant Street Asset Management, Inc.	306	$305K	0.06%	-33	13F-HR Timeline
HOEY INVESTMENTS, INC	306	$305K	0.04%	-28	13F-HR Timeline
OV Management LLC	306	$305K	0.62%	-710	13F-HR Timeline
HEMMING& WEALTH MANAGEMENT, INC.	306	$305K	0.21%	0	13F-HR Timeline
Financial Enhancement Group LLC	304	$304K	0.04%	+13	13F-HR Timeline
Dorato Capital Management	295	$304K	0.22%	0	13F-HR Timeline
Alliance Wealth Advisors, LLC	305	$304K	0.14%	0	13F-HR Timeline
Hill Investment Group Partners, LLC	305	$304K	0.03%	0	13F-HR Timeline
Hutchens & Kramer Investment Management…	304	$303K	0.1%	-197	13F-HR Timeline
MEMBERS WEALTH LLC	302	$303K	0.18%	+97	13F-HR Timeline
Coston, McIsaac & Partners	304	$303K	0.07%	0	13F-HR Timeline
KOM Wealth Management Group, LLC	304	$303K	0.21%	0	13F-HR Timeline
Financial Avengers, Inc.	304	$303K	0.14%	-2	13F-HR Timeline
DMKC Advisory Services, LLC	303	$302K	0.13%	0	13F-HR Timeline
Montz Harcus Wealth Management LLC	303	$302K	0.12%	0	13F-HR Timeline
Paladin Advisory Group, LLC	302	$301K	0.23%	0	13F-HR Timeline
CHERRYDALE WEALTH MANAGEMENT, LLC	301	$300K	0.09%	+3	13F-HR Timeline
Townsend & Associates, Inc	299	$300K	0.03%	-15	13F-HR Timeline
COOPER/HAIMS ADVISORS, LLC	301	$300K	0.14%	-2	13F-HR Timeline
BANTA ASSET MANAGEMENT LP	300	$299K	0.3%	0	13F-HR Timeline
Reliant Investment Management, LLC	300	$299K	0.14%	0	13F-HR Timeline
Parsonex Advisory Services, Inc.	300	$299K	0.29%	-1	13F-HR Timeline
Conservest Capital Advisors, Inc.	299	$298K	0.03%	+1	13F-HR Timeline
Silver Coast Investments LLC	299	$298K	0.1%	0	13F-HR Timeline
Veridan Wealth LLC	299	$298K	0.11%	-374	13F-HR Timeline
BARINGS LLCin group BARINGS LLC	298	$297K	<0.01%	new	13F-HR Timeline Group
COUNTRY TRUST BANK	298	$297K	0.01%	-100	13F-HR Timeline
marrick wealth, LLC	298	$297K	0.25%	-20	13F-HR Timeline
Prospect Financial Services LLC	298	$297K	0.18%	-9	13F-HR Timeline
STEVENS CAPITAL PARTNERS	297	$296K	0.07%	+64	13F-HR Timeline
Wills Financial Group LLC	287	$296K	0.11%	new	13F-HR Timeline
Round Rock Advisors LLC	297	$296K	0.05%	-41	13F-HR Timeline
Rodgers Brothers Inc.	297	$296K	0.03%	0	13F-HR Timeline
TruNorth Capital Management, LLC	297	$296K	0.06%	+32	13F-HR Timeline
BLUE SQUARE ASSET MANAGEMENT, LLC	297	$296K	0.14%	0	13F-HR Timeline
Arta Finance Wealth Management LLC	297	$296K	0.15%	new	13F-HR Timeline
PFS Partners, LLC	296	$295K	0.14%	+5	13F-HR Timeline
USAdvisors Wealth Management, LLC	297	$295K	0.1%	-15	13F-HR Timeline
Mullooly Asset Management, Inc.	296	$295K	0.11%	0	13F-HR Timeline
Martin Investment Management, LLC	296	$295K	0.09%	0	13F-HR Timeline
FORONJY FINANCIAL LLC	296	$295K	0.12%	-3	13F-HR Timeline
REGIMEN WEALTH, LLC	296	$295K	0.09%	+1	13F-HR Timeline
WEST MICHIGAN ADVISORS, LLC	295	$294K	0.06%	-7	13F-HR Timeline
BetterWealth, LLC	295	$294K	0.06%	+34	13F-HR Timeline
Cedar Point Capital Partners, LLC	295	$294K	0.19%	+1	13F-HR Timeline
J.M. Arbour, LLC	294	$293K	0.28%	-3	13F-HR Timeline
1 NORTH WEALTH SERVICES LLC	294	$293K	0.11%	-20	13F-HR Timeline
StoryOne LLC	0	$293K	0.17%	0	13F-HR TimelineAmount filed as zero, left out of ratios.
Crew Capital Management, Ltd	293	$292K	0.19%	+35	13F-HR Timeline
Demars Financial Group, LLC	293	$292K	0.1%	+54	13F-HR Timeline
St. Louis Trust Co	293	$292K	0.03%	0	13F-HR Timeline
Barnes Wealth Management Group, Inc	293	$292K	0.15%	-62	13F-HR Timeline
Price Financial Group Wealth Management…	292	$291K	4.81%	0	13F-HR Timeline
ACORN FINANCIAL ADVISORY SERVICES INC /…	292	$291K	0.04%	0	13F-HR Timeline
Royal Fund Management, LLC	292	$291K	0.03%	+1	13F-HR Timeline
White Lighthouse Investment Management …	291	$290K	0.04%	+2	13F-HR Timeline
VESTIA PERSONAL WEALTH ADVISORS	291	$290K	0.14%	+57	13F-HR Timeline
Koa Wealth Management, LLC	291	$290K	0.21%	-37	13F-HR Timeline
Mosley Wealth Management	313	$290K	0.13%	-50	13F-HR Timeline
MBE Wealth Management, LLC	290	$289K	0.12%	-15	13F-HR Timeline
Finward Bancorp	290	$289K	0.23%	-600	13F-HR Timeline
BOSTON RESEARCH & MANAGEMENT INC	290	$289K	0.07%	0	13F-HR/A Timeline
CHIRON CAPITAL MANAGEMENT, LLC	290	$289K	0.3%		13F-HR Timeline
Johnson & White Wealth Management, LLC	290	$289K	0.12%	+15	13F-HR Timeline
TSA Wealth Managment LLC	290	$289K	0.09%	new	13F-HR Timeline
Atlas Wealth Partners, LLC	290	$289K	0.3%	0	13F-HR Timeline
BAM Wealth Management, LLC	290	$289K	0.22%	-25	13F-HR Timeline
Apeiron RIA LLC	290	$289K	0.07%	-186	13F-HR Timeline
IMG Wealth Management, Inc.	289	$288K	0.18%	-5	13F-HR Timeline
Winning Points Advisors, LLC	288	$287K	0.29%	0	13F-HR/A Timeline
SwitchPoint Financial Planning, LLC	287	$286K	0.19%	+6	13F-HR Timeline
Evolution Wealth Advisors, LLC	287	$286K	0.03%	0	13F-HR Timeline
SWP FINANCIAL LLC	287	$286K	0.15%	+1	13F-HR Timeline
Glass Jacobson Investment Advisors llc	286	$285K	0.1%	0	13F-HR Timeline
INTREPID CAPITAL MANAGEMENT INC	286	$285K	0.11%	+2	13F-HR Timeline
New Insight Wealth Advisors	286	$285K	0.1%	-33	13F-HR Timeline
WEALTHEDGE INVESTMENT ADVISORS, LLC	285	$284K	0.1%	+13	13F-HR Timeline
AUCTUS ADVISORS LLC	285	$284K	0.27%	-155	13F-HR Timeline
Spectrum Advisors, Inc.	284	$283K	0.22%		13F-HR Timeline
Spectrum Investment Advisors, Inc.	284	$283K	0.14%	+9	13F-HR Timeline
Sovereign Investment Advisors, LLC	283	$282K	0.06%	new	13F-HR Timeline
Financial Solutions Advisory Group, Inc.	282	$281K	0.04%		13F-HR Timeline
GOLDEN ROAD ADVISORS LLC	282	$281K	0.16%	+47	13F-HR Timeline
Dunhill Financial, LLC	281	$281K	0.07%	+14	13F-HR Timeline
Rockbridge Investment Management, LCC	281	$280K	0.03%	-2	13F-HR Timeline
LFG Wealth Partners, LLC	281	$280K	0.17%	0	13F-HR Timeline
Port Capital LLC	281	$280K	0.01%	-95	13F-HR Timeline
Center for Financial Planning, Inc.	281	$280K	0.03%	-9	13F-HR Timeline
Banque de Luxembourg S.A.	281	$280K	0.14%	0	13F-HR Timeline
Nixon Capital, LLC	280	$279K	0.1%	0	13F-HR Timeline
IMA Advisory Services, Inc.	280	$279K	0.03%	0	13F-HR Timeline
Compton Financial Group, LLC	280	$279K	0.06%	+37	13F-HR Timeline
Hughes Financial Services, LLC	279	$278K	0.04%	+13	13F-HR Timeline
Integrated Quantitative Investments LLC	279	$278K	0.05%	new	13F-HR Timeline
Steffes Financial, Ltd.	279	$278K	0.15%	0	13F-HR Timeline
Advance Capital Management, Inc.	279	$278K	0.01%	+8	13F-HR Timeline
OLIO Financial Planning	279	$278K	0.08%	0	13F-HR Timeline
Seros Financial, LLC	277	$276K	0.18%	-20	13F-HR Timeline
Cannon Financial Strategists, Inc.	277	$276K	0.04%	+18	13F-HR Timeline
Uniting Wealth Partners, LLC	277	$276K	0.06%	+2	13F-HR Timeline
LCNB CORP	277	$276K	0.09%	+4	13F-HR Timeline
Barnes Dennig Private Wealth Management…	277	$276K	0.27%	+26	13F-HR Timeline
Align Financial, LLC	276	$275K	0.16%	-237,813	13F-HR Timeline
Cornerstone Wealth Advisors, Inc.	276	$275K	0.06%	0	13F-HR Timeline
Beacon Financial Strategies CORP	276	$275K	0.16%	0	13F-HR Timeline
Berman McAleer LLC	276	$275K	0.04%	new	13F-HR Timeline
HALL LAURIE J TRUSTEE	275	$274K	0.1%	-10	13F-HR Timeline
Fortitude Financial, LLC	274	$273K	0.14%	0	13F-HR Timeline
GLR Partners, LLC	274	$273K	0.15%		13F-HR Timeline
ROBERTS GLORE & CO INC /IL/	273	$272K	0.07%	-1	13F-HR Timeline
BridgePort Financial Solutions, LLC	273	$272K	0.08%	+9	13F-HR Timeline
Johnson Financial Group, LLC	273	$272K	0.02%	new	13F-HR Timeline
SFAM, LLC	273	$272K	0.25%	0	13F-HR Timeline
RHS Financial, LLC	273	$272K	0.13%	new	13F-HR Timeline
CADEN CAPITAL PARTNERS, LP	273	$272K	3.35%	+162	13F-HR Timeline
OGOREK ANTHONY JOSEPH /NY/ /ADV	273	$272K	0.07%	+7	13F-HR/A Timeline
COWA, LLC	272	$272K	0.07%	-13	13F-HR Timeline
Purewater Capital LLC	273	$272K	0.26%		13F-HR Timeline
CAPITAL CITY TRUST CO/FL	272	$271K	0.06%	+11	13F-HR Timeline
Cape Investment Advisory, Inc.	271	$270K	0.09%	+11	13F-HR Timeline
Essential Partners LLC	271	$270K	0.09%	+244	13F-HR Timeline
Hudson Capital Management LLC	271	$270K	0.07%	-76	13F-HR Timeline
Park Edge Advisors, LLC	270	$269K	0.06%	-1,589	13F-HR Timeline
ANCHOR CAPITAL ADVISORS LLC	270	$269K	0.01%	new	13F-HR Timeline
COTTONWOOD CAPITAL ADVISORS, LLC	270	$269K	0.19%	0	13F-HR Timeline
Heritage Wealth Management, Inc. /CA/	269	$268K	0.15%	-17	13F-HR Timeline
ALEXANDER LABRUNERIE & CO., INC.	269	$268K	0.1%	0	13F-HR Timeline
WAYSTONE ADVISORS LLC	269	$268K	0.24%	new	13F-HR Timeline
Horizon Wealth Management, LLC	269	$268K	0.04%	+1	13F-HR Timeline
Wharton Business Group, LLC	266	$265K	0.01%	0	13F-HR Timeline
Charter Oak Capital Management, LLC	266	$265K	0.02%	0	13F-HR Timeline
Smith Partners Wealth Management, LLC	266	$265K	0.24%	0	13F-HR Timeline
Custos Family Office, LLC	266	$265K	0.18%	new	13F-HR Timeline
ATX Financial Planning, LLC	265	$264K	0.2%	-170	13F-HR Timeline
Balentine LLC	265	$264K	0.01%	-11	13F-HR Timeline
Treasure Coast Financial Planning	265	$264K	0.14%	-7	13F-HR Timeline
Generations Wealth, LLC	264	$263K	0.26%	new	13F-HR Timeline
Security Financial Services, INC.	264	$263K	0.04%	-220	13F-HR Timeline
CULLEN INVESTMENT GROUP, LTD.	263	$262K	0.03%	0	13F-HR Timeline
LINCOLN CAPITAL CORP	263	$262K	0.1%	0	13F-HR Timeline
Insight Wealth Partners, LLC	263	$262K	0.11%	+5	13F-HR Timeline
Pflug Koory, LLC	263	$262K	0.12%	0	13F-HR Timeline
Vectors Research Management, LLC	263	$262K	0.08%	new	13F-HR Timeline
Holistic Financial Partners	262	$262K	0.1%	+3	13F-HR Timeline
Councilor Wealth, LLC	262	$261K	0.13%	-36	13F-HR Timeline
Citrine Capital LLC	262	$261K	0.11%	new	13F-HR Timeline
Center For Asset Management LLC	261	$260K	0.13%	+17	13F-HR Timeline
Merkkuri Wealth Advisors LLC	260	$260K	0.17%	+2	13F-HR Timeline
Tandem Financial, LLC	260	$259K	0.09%	+40	13F-HR Timeline
Sawyer & Company, Inc	260	$259K	0.1%	-110	13F-HR Timeline
WealthTrust Asset Management, LLC	260	$259K	0.15%	new	13F-HR Timeline
Rayburn West Financial Services LLC	260	$259K	0.15%	0	13F-HR Timeline
Manuka Financial, LLC	260	$259K	0.16%	0	13F-HR Timeline
O'ROURKE & COMPANY, Inc	259	$258K	0.1%	new	13F-HR Timeline
Mowery & Schoenfeld Wealth Management, …	259	$258K	0.39%	-121	13F-HR Timeline
Castleview Partners, LLC	259	$258K	0.13%	+8	13F-HR Timeline
ADVOCATE GROUP LLC	259	$258K	0.04%	+3	13F-HR Timeline
EnRich Financial Partners LLC	258	$257K	0.07%	0	13F-HR Timeline
Midwest Capital Advisors, LLC	258	$257K	0.12%	+32	13F-HR Timeline
MARKET STREET WEALTH MANAGEMENT ADVISOR…	257	$256K	0.04%	-1,618	13F-HR Timeline
MEANS INVESTMENT CO., INC.	256	$256K	0.02%	-59	13F-HR Timeline
PATTON FUND MANAGEMENT, INC.	256	$255K	0.04%	0	13F-HR Timeline
ORBA Wealth Advisors, L.L.C.	256	$255K	0.3%	0	13F-HR Timeline
Valued Retirements, Inc.	256	$255K	0.25%	+21	13F-HR Timeline
William Mack & Associates, Inc.	256	$255K	0.15%	-4	13F-HR Timeline
Vanguard Capital Wealth Advisors	255	$254K	0.23%	-99	13F-HR TimelineThe filing omitted confidential holdings, a later amendment may add them.
STAPP WEALTH MANAGEMENT, PLLC	254	$253K	0.32%	0	13F-HR Timeline
Disciplined Investments, LLC	254	$253K	0.09%	new	13F-HR Timeline
Nova Wealth Management, Inc.	254	$253K	0.16%	+33	13F-HR Timeline
Marshall Financial Group, LLC	254	$253K	0.04%	+11	13F-HR Timeline
WMG Financial Advisors, LLC	253	$252K	0.11%	-30	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