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
VIAWEALTH, LLC	412	$411K	0.23%	+13	13F-HR Timeline
STALEY CAPITAL ADVISERS INC	412	$411K	0.02%	-100	13F-HR Timeline
Targeted Financial Services LLC	412	$411K	0.34%	-85	13F-HR Timeline
Family Capital Management, Inc.	412	$411K	0.18%	+26	13F-HR Timeline
Samalin Investment Counsel, LLC	411	$410K	0.15%	-60	13F-HR Timeline
Leonteq Securities AG	411	$410K	0.02%	-74	13F-HR Timeline
DEFINE FINANCIAL, LLC	411	$409K	0.22%	+3	13F-HR Timeline
LifePlan Investment Advisors, Inc.	410	$409K	0.16%	+27	13F-HR Timeline
NCM Capital Management, LLC	410	$409K	0.15%	-18	13F-HR Timeline
Ledgewood Wealth Advisors, LLC	410	$409K	0.23%	0	13F-HR Timeline
Aspen Capital Management, LLC	410	$408K	0.1%	-109	13F-HR Timeline
Burford Brothers, Inc.	409	$408K	0.17%	-21	13F-HR Timeline
E&G Advisors, LLC	409	$408K	0.09%	-110	13F-HR Timeline
Summit Financial Strategies, Inc.	408	$407K	0.03%	+5	13F-HR Timeline
Sunesis Advisors, LLC	408	$407K	0.18%	new	13F-HR Timeline
Three Seasons Wealth, LLC	408	$407K	0.16%	-44	13F-HR Timeline
Spectrum Planning & Advisory Services I…	408	$406K	0.2%	-17	13F-HR Timeline
Wick Capital Partners, LLC	408	$406K	0.07%	new	13F-HR Timeline
Compagnie Lombard Odier SCmA	407	$406K	<0.01%	-271	13F-HR Timeline
Hexagon Capital Partners LLC	406	$404K	0.06%	new	13F-HR Timeline
Auto-Owners Insurance Coin group Auto-Owners Insurance Co	405	$404K	0.01%	0	13F-HR Timeline Group
Legacy Wealth Advisors, LLC	403	$402K	0.2%	new	13F-HR Timeline
Nicollet Investment Management, Inc.	403	$401K	0.14%	0	13F-HR Timeline
LATHROP INVESTMENT MANAGEMENT CO	402	$401K	0.08%	-8	13F-HR Timeline
4J Wealth Management LLC	402	$401K	0.23%	0	13F-HR Timeline
MANE GLOBAL CAPITAL MANAGEMENT LP	402	$401K	0.04%	new	13F-HR Timeline
Abound Wealth Management	402	$400K	0.09%	-301	13F-HR Timeline
Koesten, Hirschmann & Crabtree, INC.	402	$400K	0.2%	-75	13F-HR Timeline
First Citizens Financial Corp	401	$400K	0.19%	0	13F-HR Timeline
GRACE & WHITE INC /NY	400	$399K	0.07%	0	13F-HR Timeline
Northwest Bancshares, Inc.	400	$399K	0.08%	0	13F-HR Timeline
HHM Wealth Advisors, LLC	399	$398K	0.05%	-86	13F-HR Timeline
Eldridge Investment Advisors, Inc.	399	$398K	0.09%	-18	13F-HR Timeline
Ascent Advisors, LLC	399	$398K	0.73%	new	13F-HR Timeline
Avid Wealth Partners LLC	398	$397K	0.19%	+63	13F-HR Timeline
Merrithew & Thorsten Inc	397	$395K	0.37%	+1	13F-HR Timeline
OXFORD ASSET MANAGEMENT LLP	396	$395K	0.16%	-1,162	13F-HR TimelineThe filing omitted confidential holdings, a later amendment may add them.
CDM FINANCIAL COUNSELING SERVICES, INC.	396	$395K	0.38%	+22	13F-HR Timeline
RBA Wealth Management, LLC	394	$393K	0.14%	0	13F-HR Timeline
Owen LaRue, LLC	393	$392K	0.15%	-51	13F-HR Timeline
Martin Capital Partners, LLC	393	$392K	0.15%	0	13F-HR Timeline
NWM ADVISORS, LLC	393	$392K	0.36%	-136	13F-HR Timeline
E-Wealth Partners, LLC	393	$392K	0.32%	new	13F-HR Timeline
Northern Lights Advisors, Inc.	393	$391K	0.26%	new	13F-HR Timeline
Cedar Mountain Advisors, LLC	392	$391K	0.08%	+13	13F-HR Timeline
RHODES INVESTMENT ADVISORS INC /ADV	392	$391K	0.34%	+5	13F-HR Timeline
SYNTAX RESEARCH, INC.	392	$391K	0.25%	0	13F-HR Timeline
Fairscale Capital, LLC	392	$391K	0.27%	0	13F-HR Timeline
SUTTON PLACE INVESTORS LLC	391	$390K	0.21%	+32	13F-HR Timeline
RED REEF ADVISORS LLC	391	$390K	0.41%	-4	13F-HR Timeline
Portland Global Advisors LLC	389	$388K	0.04%	0	13F-HR Timeline
RETIREMENT INCOME SOLUTIONS, INC	388	$387K	0.07%	+10	13F-HR Timeline
John W. Brooker & Co., CPAs	388	$387K	0.61%	+73	13F-HR Timeline
BCGM Wealth Management, LLC	388	$386K	0.1%	+1	13F-HR Timeline
Investment Planning Advisors, Inc.	388	$386K	0.11%	+127	13F-HR Timeline
Capital Management Associates, Inc	387	$386K	0.09%	+3	13F-HR Timeline
Silver Lake Advisory, LLC	387	$385K	0.15%	+1	13F-HR Timeline
JEPPSON WEALTH MANAGEMENT, LLC	385	$384K	0.12%	-30	13F-HR Timeline
Towercrest Capital Management	385	$383K	0.06%	+20	13F-HR Timeline
Kure Advisory, LLC	384	$383K	0.21%	-29	13F-HR Timeline
VICUS CAPITAL	384	$383K	0.03%	-7	13F-HR Timeline
Impact Partnership Wealth, LLC	384	$382K	0.05%	+50	13F-HR Timeline
NavPoint Financial, Inc.	383	$381K	0.15%	0	13F-HR Timeline
Owl Creek Wealth Partners LLC	382	$381K	0.14%		13F-HR Timeline
Buck Wealth Strategies, LLC	382	$381K	0.05%	+82	13F-HR Timeline
Orographic Financial Advisors, LLC	382	$380K	0.27%		13F-HR Timeline
Alliance Wealth Management Group	381	$379K	0.08%	+20	13F-HR Timeline
BROGAN FINANCIAL, INC.	380	$379K	0.17%	0	13F-HR Timeline
Capco Asset Management, LLC	380	$379K	0.1%	0	13F-HR Timeline
C2C Wealth Management, LLC	380	$379K	0.32%	0	13F-HR Timeline
CLEAR WAVE WEALTH MANAGEMENT LLC	380	$379K	0.1%		13F-HR Timeline
STEWARDSHIP CONCEPTS FINANCIAL SERVICES…	380	$379K	0.3%	+15	13F-HR Timeline
Cranbrook Wealth Management, LLC	378	$377K	0.08%	-29	13F-HR Timeline
LaFleur & Godfrey LLC	378	$377K	0.05%	+30	13F-HR Timeline
FIDUCIENT ADVISORS LLC	377	$376K	0.05%	-33	13F-HR Timeline
Trust Co of Kansas	376	$375K	0.21%	-13	13F-HR Timeline
UHLMANN PRICE SECURITIES, LLC	378	$374K	0.03%	+107	13F-HR Timeline
Meridian Wealth Partners, LLC	373	$372K	0.05%	+31	13F-HR Timeline
Welch Financial Planning, LLC	373	$372K	0.27%	+40	13F-HR Timeline
Gilbert & Cook, Inc.	372	$371K	0.05%	-89	13F-HR Timeline
WOODWARD DIVERSIFIED CAPITAL, LLC	371	$371K	0.17%	-6	13F-HR Timeline
Addison Advisors LLC	370	$369K	0.08%	+19	13F-HR Timeline
Griffith & Werner, Inc.	370	$369K	0.18%	-28	13F-HR Timeline
INVENIO WEALTH PARTNERS LLC	370	$369K	0.15%	-197	13F-HR Timeline
REXFORD CAPITAL INC	370	$369K	0.26%	+31	13F-HR Timeline
Wealth Dimensions Group, Ltd.	370	$369K	0.07%	+16	13F-HR Timeline
Stonehearth Capital Management, LLC	369	$368K	0.15%	0	13F-HR Timeline
Avail Investment Partners, LLC	367	$366K	0.39%		13F-HR Timeline
Waterfront Wealth Inc.	367	$366K	0.07%	+45	13F-HR Timeline
PENSION & WEALTH MANAGEMENT ADVISORS, I…	366	$366K	0.11%	-13	13F-HR Timeline
GatePass Capital, LLC	366	$365K	0.18%	+42	13F-HR Timeline
Overbrook Management Corp	366	$365K	0.07%	new	13F-HR Timeline
REAP Financial Group, LLC	365	$364K	0.07%	0	13F-HR Timeline
PINNEY & SCOFIELD, INC.	364	$363K	0.2%	0	13F-HR Timeline
Cogent Private Wealth, Inc.	364	$363K	0.26%	+112	13F-HR Timeline
MCDONALD PARTNERS LLC	363	$362K	0.09%	+50	13F-HR Timeline
Leith Wheeler Investment Counsel Ltd.	363	$362K	0.03%	-8	13F-HR Timeline
Capstone Wealth Management Group LLCin group Capstone Wealth Management Gr…	362	$361K	0.22%	0	13F-HR Timeline Group
N.E.W. Advisory Services LLC	362	$361K	0.03%	-27	13F-HR Timeline
Gordian Advisors LLC	362	$361K	0.24%	0	13F-HR Timeline
Financial Council, LLC	362	$361K	0.14%	0	13F-HR Timeline
HARRIS ASSOCIATES L P	362	$361K	<0.01%	-294	13F-HR Timeline
Wagner Wealth Management, LLC	361	$360K	0.07%	0	13F-HR Timeline
Eurizon SLJ Capital Ltd	361	$360K	0.17%	-356	13F-HR Timeline
Mine & Arao Wealth Creation & Managemen…	360	$359K	0.15%	0	13F-HR Timeline
Entelevest, LLC	360	$359K	0.37%	-3	13F-HR Timeline
Aldebaran Financial Inc.	360	$359K	0.34%	0	13F-HR Timeline
WEALTHCARE CAPITAL MANAGEMENT LLC	360	$358K	0.04%	0	13F-HR Timeline
GABLES CAPITAL MANAGEMENT INC.	359	$358K	0.15%	0	13F-HR Timeline
Vawter Financial, Ltd.	359	$358K	0.15%	-12	13F-HR/A Timeline
Parker Financial LLC	358	$357K	0.14%	new	13F-HR Timeline
Clayton Financial Group LLC	358	$357K	0.18%	+10	13F-HR Timeline
Slagle Financial, LLC	358	$357K	0.12%	new	13F-HR Timeline
ADAMSBROWN WEALTH CONSULTANTS LLC	357	$356K	0.09%	+22	13F-HR Timeline
Thrive Capital Management, LLC	357	$356K	0.08%	+21	13F-HR Timeline
Widmann Financial Services, Inc.	357	$356K	0.21%	0	13F-HR Timeline
Fingerlakes Wealth Management, Inc.	356	$355K	0.24%	0	13F-HR Timeline
Frontier Asset Management, LLC	356	$355K	0.07%	-496	13F-HR Timeline
Smith Thornton Advisors LLC	355	$354K	0.18%	+2	13F-HR Timeline
S Harris Financial Group, LLC	355	$354K	0.32%	+60	13F-HR Timeline
Parkwoods Wealth Partners, LLC	354	$353K	0.09%	-12	13F-HR Timeline
Vilga Financial Planning LLC	354	$353K	0.32%	-6	13F-HR Timeline
AGH Wealth Advisors, LLC	354	$353K	0.26%	+39	13F-HR Timeline
OxenFree Capital LLC	358	$353K	0.17%	+26	13F-HR Timeline
Integrity Wealth Partners, LLC	353	$352K	0.32%		13F-HR Timeline
FLAGSHIP WEALTH ADVISORS, LLC	355	$351K	0.15%	-100	13F-HR Timeline
Seek First Inc.	351	$350K	0.25%	0	13F-HR Timeline
Chung Wu Investment Group, LLC	350	$349K	0.3%	0	13F-HR Timeline
WILLIAM JOHN SEMPOLINSKI	350	$349K	0.18%	+50	13F-HR Timeline
FSA Investment Group, LLC	349	$348K	0.14%	new	13F-HR Timeline
Altar Rock LLC	349	$348K	0.41%	+62	13F-HR Timeline
Strata Wealth Advisors, LLC	347	$346K	0.09%	+3	13F-HR Timeline
Carson Advisory Inc.	346	$345K	0.18%	0	13F-HR Timeline
Jackson Hole Capital Partners, LLC	346	$345K	0.06%	0	13F-HR Timeline
Asset Allocation Strategies LLC	346	$344K	0.06%	-16	13F-HR Timeline
PENOBSCOT WEALTH MANAGEMENT	345	$344K	0.1%	0	13F-HR Timeline
Austin Asset Management Co Inc	344	$343K	0.06%	new	13F-HR Timeline
DENVER WEALTH MANAGEMENT, INC.	344	$343K	0.12%	-32	13F-HR Timeline
Heck Capital Advisors, LLC	344	$343K	0.03%	-2	13F-HR Timeline
Manske Wealth Management	344	$343K	0.1%	+109	13F-HR Timeline
FIRST FINANCIAL BANK - TRUST DIVISION	343	$342K	0.03%	-81	13F-HR Timeline
Fortune 45 LLC	342	$341K	0.17%	-1,581	13F-HR Timeline
ACUTE INVESTMENT ADVISORY, LLC	342	$341K	3.83%	-35	13F-HR Timeline
Pegasus Asset Management, Inc.	341	$340K	0.11%	-20	13F-HR/A Timeline
Providence Capital Advisors, LLC	341	$340K	0.06%	-20	13F-HR Timeline
FOUNDERS GROVE WEALTH PARTNERS, LLC	341	$340K	0.08%	+31	13F-HR Timeline
LYNCH & ASSOCIATES/IN	341	$339K	0.06%	-23	13F-HR Timeline
Riverbend Wealth Management, LLC	340	$339K	0.21%	+29	13F-HR Timeline
WEALTHSPAN PARTNERS, LLC	340	$339K	0.12%	0	13F-HR Timeline
Expressive Wealth LLC	340	$339K	0.32%	-274	13F-HR Timeline
MAYPORT, LLC	339	$337K	0.06%	+21	13F-HR Timeline
BNP PARIBASin group BNP PARIBAS	338	$337K	0.01%	-4,423	13F-HR Timeline Group
CORA CAPITAL ADVISORS LLC	338	$337K	0.11%	-23	13F-HR Timeline
HF Advisory Group, LLC	338	$337K	0.11%	-1	13F-HR Timeline
Breachway Investments LLC	338	$336K	0.32%	0	13F-HR Timeline
BlueSky Wealth Advisors, LLC	337	$336K	0.04%	new	13F-HR Timeline
Global Financial Private Client, LLC	337	$336K	0.11%	+17	13F-HR Timeline
GREAT OAK CAPITAL PARTNERS, LLC	326	$336K	0.08%	new	13F-HR Timeline
Cascades Capital Asset Management, LLC	336	$335K	0.14%	-87	13F-HR Timeline
Guidance Point Advisors, LLC	333	$334K	0.08%	0	13F-HR Timeline
PLANNING DIRECTIONS INC	335	$333K	0.17%	+1	13F-HR Timeline
Madrid Wealth Management, LLC	334	$333K	0.25%	0	13F-HR/A Timeline
Wealth Watch Advisors, INC	334	$333K	0.14%	+226	13F-HR Timeline
WMS Group LLC	334	$333K	0.48%	-1	13F-HR Timeline
Aspire Growth Partners LLC	333	$332K	0.23%	+10	13F-HR Timeline
Flaharty Asset Management, LLC	332	$331K	0.04%	0	13F-HR Timeline
Tower Wealth Partners, Inc.	331	$330K	0.18%	0	13F-HR Timeline
SIERRA OCEAN, LLC	331	$330K	0.27%	+32	13F-HR Timeline
Cedarwood Wealth LLC	330	$329K	0.33%	-44	13F-HR Timeline
BANTAMAC CAPITAL, LLC	330	$329K	0.24%	0	13F-HR Timeline
Wealthstar Advisors, LLC	330	$328K	0.2%	-35	13F-HR Timeline
Lynx Investment Advisory	330	$328K	0.16%	-2	13F-HR Timeline
Montis Financial, LLC	330	$328K	0.07%	+59	13F-HR Timeline
Granite Group Advisors, LLC	324	$328K	0.2%	-53	13F-HR Timeline
BlueChip Wealth Advisors LLC	357	$328K	0.14%	+35	13F-HR Timeline
TPG Financial Advisors, LLC	328	$327K	0.11%	-58	13F-HR Timeline
IAG Wealth Partners, LLC	328	$327K	0.04%	0	13F-HR Timeline
Sunburst Financial Group, LLC	327	$326K	0.06%	+5	13F-HR/A Timeline
SP Asset Management LLC	327	$326K	0.03%	-84	13F-HR Timeline
Pacific Excel Wealth Advisors, Inc.	326	$325K	0.34%	new	13F-HR Timeline
Murphy Pohlad Asset Management LLC	326	$325K	0.12%	0	13F-HR Timeline
Joel Adams & Associates, Inc.	326	$325K	0.24%	0	13F-HR Timeline
Family Office Research LLC	325	$324K	0.14%	-42	13F-HR Timeline
Gold Investment Management Ltd.	325	$324K	0.1%	0	13F-HR Timeline
PROMETHIUM ADVISORS,LLC	325	$324K	0.17%	0	13F-HR Timeline
Armbruster Capital Management, Inc.	324	$323K	0.05%	0	13F-HR Timeline
GFI Investment Counsel Ltd.	324	$323K	0.04%	+67	13F-HR Timeline
Sensible Money, LLC	323	$322K	0.1%	0	13F-HR Timeline
JNBA Financial Advisors	323	$322K	0.03%	+26	13F-HR Timeline
Ketron Financial	321	$320K	0.11%	+30	13F-HR Timeline
WESPAC Advisors SoCal, LLC	321	$320K	0.07%	0	13F-HR Timeline
IMZ Advisory Inc	320	$319K	0.12%	+3	13F-HR Timeline
iSAM Funds (UK) Ltdin group iSAM Funds (UK) Ltd	319	$318K	0.16%	new	13F-HR Timeline Group
Eagle Bay Advisors LLC	319	$318K	0.28%	-54	13F-HR Timeline
SHRIER WEALTH MANAGEMENT, LLC	318	$317K	0.12%	new	13F-HR Timeline
Riggs Asset Managment Co. Inc.	318	$317K	0.07%	0	13F-HR Timeline
Twin Lakes Capital Management, LLC	318	$317K	0.14%	0	13F-HR Timeline
Madison Park Capital Advisors, LLC	318	$317K	0.25%	-1	13F-HR Timeline
StoneCrest Wealth Management, Inc.	317	$316K	0.13%	-202	13F-HR Timeline
RMG Wealth Management LLC	316	$316K	0.04%	+6	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