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
GR FINANCIAL GROUP, LLC	813	$810K	0.27%	-217	13F-HR Timeline
Centennial Wealth Advisory LLC	811	$808K	0.2%	-281	13F-HR Timeline
WNY Asset Management, LLC	810	$807K	0.08%		13F-HR Timeline
TrueWealth Financial Partners	808	$805K	0.32%	new	13F-HR Timeline
JB Capital LLC	807	$804K	0.03%	-109	13F-HR Timeline
Thompson David Blair	806	$803K	0.46%	-68	13F-HR Timeline
Weinberger Asset Management, Inc	805	$803K	0.3%	-168	13F-HR Timeline
ELEVATION WEALTH PARTNERS, LLC	805	$802K	0.29%	-40	13F-HR Timeline
Thrive Wealth Management, LLC	805	$802K	0.12%	+25	13F-HR Timeline
Oakmont Advisory Group, LLC	804	$801K	0.82%	+81	13F-HR Timeline
Per Stirling Capital Management, LLC.	803	$800K	0.09%	+43	13F-HR Timeline
Riverview Trust Co	803	$800K	0.99%	0	13F-HR Timeline
New Republic Capital, LLC	802	$799K	0.27%	-400	13F-HR Timeline
Winthrop Partners - WNY, LLC	799	$796K	0.42%	0	13F-HR Timeline
Riverwater Partners LLC	798	$795K	0.27%	+31	13F-HR Timeline
Benchmark Financial, LLC	797	$795K	0.71%	+54	13F-HR Timeline
Brucke Financial, Inc.	794	$791K	0.4%	+350	13F-HR Timeline
EdgeRock Capital LLC	791	$789K	0.21%	+73	13F-HR Timeline
Empirical Asset Management, LLC	791	$789K	0.21%	-38,785	13F-HR Timeline
BDFS Capital LLC	791	$788K	0.38%	+2	13F-HR Timeline
Ellevest, Inc.	790	$787K	0.11%	-36	13F-HR Timeline
Lantern Wealth Advisors, LLC	790	$787K	0.4%	+170	13F-HR Timeline
1248 Management, LLC	790	$787K	0.36%	0	13F-HR Timeline
KWMG, LLC	789	$786K	0.07%	-8	13F-HR Timeline
LightSquare Wealth Management, LLC	788	$786K	0.59%		13F-HR Timeline
LifeWealth Investments, LLC	788	$785K	0.23%	-140	13F-HR Timeline
SOUTH PLAINS FINANCIAL, INC.	788	$785K	0.46%	+50	13F-HR Timeline
Elite Life Management LLC	777	$784K	0.98%	+37	13F-HR Timeline
Key Client Fiduciary Advisors, LLC	786	$783K	0.27%	+14	13F-HR Timeline
MorganRosel Wealth Management, LLC	786	$783K	0.31%	-257	13F-HR Timeline
Edgemoor Investment Advisors, Inc.	785	$783K	0.06%	0	13F-HR Timeline
Horizon Investment Services, LLC	785	$783K	0.27%	+443	13F-HR Timeline
Financial Planning Hawaii, Inc.	786	$783K	0.46%	-25	13F-HR Timeline
Virtue Capital Management, LLC	782	$779K	0.12%	-1	13F-HR Timeline
Wealth Management Associates, Inc.	779	$777K	0.27%	0	13F-HR Timeline
Investment Partners Asset Management, I…	779	$776K	0.48%	+2	13F-HR Timeline
Tamar Securities, LLC	778	$776K	0.08%	-45	13F-HR Timeline
Trademark Financial Management, LLC	778	$776K	0.38%	-21	13F-HR Timeline
Jacobsen Capital Management	778	$775K	0.26%	+35	13F-HR Timeline
Murphy & Mullick Capital Management Corp	777	$774K	0.57%	+23	13F-HR Timeline
CAPSTONE WEALTH MANAGEMENT GROUP, LLC	773	$771K	0.32%	+36	13F-HR Timeline
1776 Wealth LLC	772	$769K	0.3%	0	13F-HR Timeline
HORAN Wealth, LLC	803	$769K	0.07%	+10	13F-HR Timeline
Templeton & Phillips Capital Management…	771	$768K	0.63%	0	13F-HR Timeline
Empire Financial Management Company, LLC	770	$767K	0.17%	0	13F-HR Timeline
Southland Equity Partners LLC	769	$767K	0.15%	+39	13F-HR Timeline
Berkeley Capital Partners, LLC	769	$766K	0.18%	+160	13F-HR Timeline
CMG Global Holdings, LLC	768	$765K	0.36%	0	13F-HR Timeline
Finer Wealth Management, Inc.	768	$765K	0.39%	+457	13F-HR Timeline
Legacy Wealth Partners, LLC	768	$765K	0.19%	-32	13F-HR Timeline
KRS Capital Management, LLC	767	$765K	0.47%	-25	13F-HR Timeline
Alpha Financial Partners LLC	767	$765K	0.45%	-9	13F-HR Timeline
Oakmont Investment Advisors, Inc.	765	$764K	0.7%	-19	13F-HR Timeline
TWIN PEAKS WEALTH ADVISORS, LLC	766	$764K	0.19%	-37	13F-HR Timeline
Beacon Financial Advisory LLC	765	$763K	0.17%	+90	13F-HR Timeline
MAGNOLIA CAPITAL ADVISORS LLC	765	$762K	0.15%	+109	13F-HR Timeline
First City Capital Management, Inc.	764	$761K	0.4%	-15	13F-HR Timeline
Flatrock Wealth Partners LLC	764	$761K	0.34%	+290	13F-HR Timeline
SEIZERT CAPITAL PARTNERS, LLC	763	$760K	0.03%	0	13F-HR Timeline
SilverOak Wealth Management LLC	763	$760K	0.12%	+4	13F-HR Timeline
KFA Private Wealth Group, LLC	762	$760K	0.18%	-11	13F-HR Timeline
Strid Group, LLC	762	$759K	0.09%	-15	13F-HR Timeline
Tandem Investment Partners LLC	761	$758K	0.64%	-90	13F-HR Timeline
Rise Advisors, LLC	761	$758K	0.27%	+3	13F-HR Timeline
LRI Investments, LLC	759	$757K	0.07%	+59	13F-HR Timeline
Brick & Kyle, Associates	759	$756K	0.25%	new	13F-HR Timeline
Saxony Capital Management, LLC	758	$755K	0.44%	+140	13F-HR Timeline
AmeriServ Wealth Advisorsin group AmeriServ Wealth Advisors	758	$755K	0.48%	-20	13F-HR Timeline Group
Strategic Planning, Inc.	758	$755K	0.38%	0	13F-HR Timeline
Essex LLC	757	$754K	0.13%	-507	13F-HR Timeline
Elite Wealth Management, Inc.	756	$753K	0.24%	-406	13F-HR Timeline
Ruggaard & Associates LLC	756	$753K	0.3%	-25	13F-HR Timeline
PUREfi Wealth, LLC	755	$753K	0.49%	+368	13F-HR Timeline
ENZI WEALTH	752	$750K	0.26%	+3	13F-HR Timeline
Gilman Hill Asset Management, LLC	751	$749K	0.11%	-1	13F-HR Timeline
WJ Wealth Management, LLC	751	$748K	0.35%	0	13F-HR Timeline
AUA CAPITAL MANAGEMENT, LLC	750	$747K	0.38%	0	13F-HR Timeline
Odyssean, LLC	750	$747K	0.27%	new	13F-HR Timeline
Swisher Financial Concepts, Inc.	749	$746K	0.42%	-2	13F-HR Timeline
AIMZ Investment Advisors, LLC	746	$743K	0.23%	+2	13F-HR Timeline
Tidemark, LLC	746	$743K	0.19%	+57	13F-HR Timeline
VIRTUE ASSET MANAGEMENT LLC	741	$739K	0.59%	-52	13F-HR Timeline
Riverstone Advisors, LLC	741	$738K	0.36%	+31	13F-HR Timeline
COLLECTIVE FAMILY OFFICE LLC	740	$737K	0.17%	+22	13F-HR Timeline
Aspen Grove Capital, LLC	739	$737K	0.14%	0	13F-HR Timeline
MCRAE CAPITAL MANAGEMENT INC	738	$735K	0.15%	0	13F-HR Timeline
Firestone Capital Management	736	$734K	0.15%	-17	13F-HR Timeline
Tevis Investment Management	736	$733K	0.42%	-491	13F-HR Timeline
Scott Capital Advisors, LLC	734	$733K	0.15%	0	13F-HR Timeline
Scarborough Advisors, LLC	735	$732K	0.08%	-4	13F-HR Timeline
J.Safra Asset Management Corp	734	$731K	0.04%	+1	13F-HR Timeline
Medallion Wealth Advisors, LLC	732	$729K	0.24%	-58	13F-HR Timeline
Blossom Wealth Management	731	$728K	1.08%	-28	13F-HR Timeline
Lee Financial Co	731	$728K	0.1%	-376	13F-HR Timeline
Hamilton Capital, LLC	730	$727K	0.04%	-60	13F-HR Timeline
BOS Asset Management, LLC	730	$727K	0.19%	+15	13F-HR Timeline
Presidio Capital Management, LLC	730	$727K	0.21%	-39	13F-HR Timeline
Sandy Cove Advisors, LLC	728	$725K	0.22%	+4	13F-HR Timeline
PRIVATE CLIENT SERVICES, LLC	728	$725K	0.22%	+8	13F-HR Timeline
Callahan Advisors, LLC	725	$723K	0.06%	-33	13F-HR Timeline
TigerOak Management, L.L.C.	725	$722K	0.23%	0	13F-HR Timeline
Pine Harbor Wealth Management, LLC	725	$722K	0.22%	0	13F-HR Timeline
Rooted Wealth Advisors, Inc.	723	$722K	0.19%	+87	13F-HR Timeline
LVM CAPITAL MANAGEMENT LTD/MI	723	$720K	0.07%	+93	13F-HR Timeline
Smith & Howard Wealth Management, LLC	722	$720K	0.16%	+1	13F-HR Timeline
Silver Grove Financial Group, Inc.	722	$719K	0.58%	new	13F-HR Timeline
Argos Wealth Advisors, LLC	722	$719K	0.21%	0	13F-HR Timeline
Royal Capital Wealth Management, LLC	721	$719K	0.45%	0	13F-HR Timeline
Tarbox Family Office, Inc.	721	$718K	0.12%	-153	13F-HR Timeline
WealthBridge Capital Management, LLC	720	$718K	0.17%	+18	13F-HR Timeline
Caliber Wealth Management, LLC / KS	719	$717K	0.08%	+50	13F-HR Timeline
Dempze Nancy E	718	$715K	0.39%	0	13F-HR Timeline
Anfield Capital Management, LLCin group Anfield Capital Management, L…	718	$715K	0.2%	+415	13F-HR Timeline Group
BCV Asset Management Inc.	717	$714K	0.02%	new	13F-HR Timeline
Sunflower Bank, N.A.	717	$714K	0.18%	+6	13F-HR Timeline
Aberdeen Wealth Management LLC	716	$713K	0.33%	0	13F-HR Timeline
Orin Green Financial, LLC	716	$713K	0.29%	0	13F-HR Timeline
CHAPIN DAVIS, INC.	715	$712K	0.16%	0	13F-HR Timeline
Rosenberg Matthew Hamilton	715	$712K	0.15%	+20	13F-HR Timeline
Elm3 Financial Group, LLC	714	$712K	0.6%	0	13F-HR Timeline
FIDUCIARY FINANCIAL GROUP, LLC	713	$711K	0.09%	+23	13F-HR Timeline
Krane Financial Solutions LLC	712	$709K	0.48%		13F-HR Timeline
West Wealth Group, LLC	710	$708K	0.14%	+58	13F-HR Timeline
Ipsen Advisor Group LLC	711	$708K	0.5%	0	13F-HR Timeline
Quantum Financial Advisors, LLC	710	$708K	0.08%	+15	13F-HR Timeline
WHITE PINE CAPITAL LLC	710	$707K	0.19%	+5	13F-HR/A Timeline
Beverly Hills Private Wealth, LLC	709	$707K	0.12%	-178	13F-HR Timeline
HEADINVEST, LLC	709	$707K	0.14%	+61	13F-HR Timeline
Palisade Asset Management, LLC	709	$706K	0.07%	+7	13F-HR Timeline
Successful Portfolios LLC	708	$706K	0.39%	-17	13F-HR Timeline
Hendershot Investments Inc.	708	$705K	0.09%	0	13F-HR Timeline
TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU…	707	$704K	0.24%	+167	13F-HR TimelineThe filing omitted confidential holdings, a later amendment may add them.
Sunpointe, LLC	705	$703K	0.23%	+71	13F-HR Timeline
Eaton Financial Holdings Company, LLC	703	$701K	0.23%	-33	13F-HR Timeline
SAWGRASS ASSET MANAGEMENT LLC	703	$700K	0.11%	+129	13F-HR Timeline
J. L. Bainbridge & Co., Inc.	700	$697K	0.06%	+13	13F-HR Timeline
Optivise Advisory Services LLC	698	$695K	0.42%	+150	13F-HR Timeline
CWC Advisors, LLC.	697	$695K	0.33%	+44	13F-HR Timeline
Well Done, LLC	697	$695K	0.1%	-5	13F-HR Timeline
Capital Squared Financial LLC	695	$693K	0.53%	0	13F-HR Timeline
Austin Wealth Management, LLC	679	$692K	0.16%	-50	13F-HR Timeline
TrinityBridge Ltd	693	$690K	0.02%	-121	13F-HR Timeline
Oder Investment Management, LLC	692	$690K	0.53%	-22	13F-HR Timeline
GREENWOOD CAPITAL ASSOCIATES LLC	692	$690K	0.08%	+305	13F-HR Timeline
HRC WEALTH MANAGEMENT, LLC	691	$688K	0.33%	-9	13F-HR Timeline
Intrua Financial, LLC	690	$688K	0.07%	-290	13F-HR Timeline
Alaska Wealth Advisors, LLCin group Alaska Permanent Capital Mana…	690	$687K	0.08%	-10	13F-HR Timeline Group
Valtinson Bruner Financial Planning LLC	689	$686K	0.19%	+128	13F-HR Timeline
Carmel Capital Partners, LLC	686	$684K	0.25%	+160	13F-HR Timeline
CORRECT CAPITAL WEALTH MANAGEMENT	685	$683K	0.13%	0	13F-HR Timeline
NESTEGG ADVISORS, INC.	680	$678K	0.6%	-290	13F-HR Timeline
KFG WEALTH MANAGEMENT, LLC	676	$674K	0.09%	-7	13F-HR Timeline
First Growth Capital LLC	676	$674K	0.61%	0	13F-HR Timeline
Echo45 Advisors LLC	676	$673K	0.38%	+7	13F-HR Timeline
Clarity Wealth Development LLC	675	$673K	0.55%	0	13F-HR Timeline
Hiley Hunt Wealth Management	673	$671K	0.3%	+1	13F-HR Timeline
Gambit Capital Management, LLC	673	$671K	0.48%	-42	13F-HR Timeline
SFM, LLC d/b/a Sweeney Financial Adviso…	672	$670K	0.4%	-12	13F-HR Timeline
Hartmann Taylor Wealth Management, LLC	672	$670K	0.44%	0	13F-HR Timeline
Warren Street Wealth Advisors, LLC	672	$670K	0.17%	+141	13F-HR Timeline
Hedeker Wealth, LLC	671	$669K	0.14%	-2,810	13F-HR Timeline
Momentous Wealth Management, Inc.	671	$668K	0.38%	-5	13F-HR Timeline
Chesapeake Wealth Management	670	$668K	0.2%	+69	13F-HR Timeline
Accelerate Investment Advisors LLC	670	$667K	0.45%	+36	13F-HR Timeline
Stonebridge Financial Group, LLC	669	$667K	0.05%	+201	13F-HR Timeline
PEOPLES FINANCIAL SERVICES CORP.	667	$665K	0.31%	-12	13F-HR Timeline
NOVEM GROUP	666	$664K	0.08%	+108	13F-HR Timeline
Peak Financial Management, Inc.	665	$663K	0.17%	+23	13F-HR Timeline
XY Planning Network, Inc.	665	$663K	0.11%	-25	13F-HR Timeline
Trust Co	665	$663K	0.06%	+58	13F-HR Timeline
Asio Capital, LLC	665	$663K	0.09%	-43	13F-HR Timeline
Granite Harbor Advisors, Inc.	665	$663K	0.29%	+39	13F-HR Timeline
North Berkeley Wealth Management, LLC	665	$663K	0.35%	+91	13F-HR Timeline
Lantz Financial LLC	665	$662K	0.14%	+28	13F-HR Timeline
Total Clarity Wealth Management, Inc.	662	$660K	0.16%	+10	13F-HR Timeline
2UniFi Bank	662	$660K	0.32%	+26	13F-HR Timeline
Severin Investments, LLC	661	$659K	0.57%	new	13F-HR Timeline
Park Place Capital Corp	658	$656K	0.13%	-7	13F-HR Timeline
Heritage Family Offices, LLP	658	$656K	0.29%	+345	13F-HR Timeline
Timothy G. Youngquist 2020 Irrevocable …	657	$655K	0.32%	new	13F-HR Timeline
Point Windward Advisors Inc.	655	$653K	0.33%	0	13F-HR Timeline
Fideuram Asset Management (Ireland) dac	654	$652K	0.08%	-5,223	13F-HR Timeline
Aster Capital Management (DIFC) Ltd	689	$652K	0.21%	+649	13F-HR Timeline
M1 Capital Management LLC	653	$651K	0.3%	-32	13F-HR Timeline
a16z Perennial Management, L.P.in group a16z Capital Management, L.L.…	653	$651K	0.05%	0	13F-HR Timeline Group
MARIETTA INVESTMENT PARTNERS LLC	652	$650K	0.13%	+90	13F-HR Timeline
Blankinship & Foster, LLC	651	$649K	0.14%	-15	13F-HR Timeline
INVESTED ADVISORS	651	$649K	0.66%	+4	13F-HR Timeline
FLOYD FINANCIAL GROUP LLC	658	$648K	0.43%	+18	13F-HR Timeline
Evansbrook LLC	649	$647K	0.43%	+40	13F-HR Timeline
Peterson Wealth Advisors, LLC	649	$647K	0.09%	+1	13F-HR Timeline
Newman Dignan & Sheerar, Inc.	648	$646K	0.14%	+11	13F-HR Timeline
XXI WEALTH, LLC	648	$646K	0.37%	+70	13F-HR Timeline
THOMPSON INVESTMENT MANAGEMENT, INC.	648	$646K	0.08%	0	13F-HR Timeline
FOURPATH CAPITAL MANAGEMENT, LLC	648	$646K	0.09%	+12	13F-HR Timeline
CHARTER RESEARCH & INVESTMENT GROUP, IN…	647	$645K	0.43%	0	13F-HR Timeline
VAN STRUM & TOWNE INC.	647	$645K	0.19%	-15	13F-HR Timeline
CPA Asset Management Group, LLC	647	$644K	0.22%	0	13F-HR Timeline
SBE LLC DBA CEDAR COVE WEALTH PARTNERS	646	$644K	0.34%	+3	13F-HR Timeline
Prota Financial, LLC	646	$643K	0.47%	+79	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