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
Quest 10 Wealth Builders, Inc.	198	$197K	0.17%	+18	13F-HR Timeline
Longview Financial Advisors LLC	196	$195K	0.11%	0	13F-HR Timeline
Wiser Advisor Group LLC	194	$193K	0.23%	0	13F-HR Timeline
Clark Wealth Partners	190	$190K	0.13%	+9	13F-HR Timeline
Curat Global, LLC	189	$188K	0.19%	-120	13F-HR Timeline
Financial Gravity Asset Management, Inc.in group Financial Gravity Companies, …	185	$184K	0.03%	+38	13F-HR Timeline Group
ESSEX INVESTMENT MANAGEMENT CO LLC	180	$179K	0.03%	0	13F-HR Timeline
Graney & King, LLC	173	$172K	0.09%	0	13F-HR Timeline
CONSULTIVA WEALTH MANAGEMENT, CORP.	173	$172K	0.5%	0	13F-HR Timeline
Pioneer Family Office, LLC	170	$169K	0.11%	0	13F-HR Timeline
Byrne Asset Management LLC	169	$168K	0.1%	-1	13F-HR Timeline
Bravera Wealth	169	$168K	0.08%	0	13F-HR Timeline
Wilkerson Advisory Group LLC	167	$166K	0.06%	+62	13F-HR Timeline
Private Wealth Management Group, LLC	166	$165K	0.04%	0	13F-HR Timeline
Catalyst Capital Advisors LLC	164	$163K	<0.01%	-9	13F-HR Timeline
Rachor Investment Advisory Services, LLC	163	$163K	0.09%	0	13F-HR Timeline
Atlantic Edge Private Wealth Management…	162	$161K	0.04%	0	13F-HR Timeline
Strengthening Families & Communities, L…	160	$160K	0.04%	-1,007	13F-HR Timeline
Bayforest Capital Ltd	160	$159K	0.18%	-375	13F-HR Timeline
Hilton Head Capital Partners, LLC	159	$158K	0.09%	+2	13F-HR Timeline
Measured Wealth Private Client Group, L…	158	$157K	0.04%	0	13F-HR Timeline
Jackson, Grant Investment Advisers, Inc.	157	$156K	0.05%	0	13F-HR Timeline
Migdal Insurance & Financial Holdings L…in group Migdal Insurance & Financial …	153	$152K	<0.01%	-50	13F-HR Timeline Group
10Elms LLP	152	$151K	0.1%	-40	13F-HR Timeline
Richardson Capital Management LLC	151	$151K	0.07%	+20	13F-HR Timeline
JCIC Asset Management Inc.	150	$149K	0.05%	0	13F-HR Timeline
COHEN & STEERS, INC.in group COHEN & STEERS, INC.	150	$149K	<0.01%	0	13F-HR Timeline Group
Kemnay Advisory Services Inc.	147	$146K	0.02%	-89	13F-HR Timeline
Joseph Group Capital Management	139	$139K	0.03%	+101	13F-HR Timeline
Harbor Asset Planning, Inc.	138	$138K	0.12%	0	13F-HR Timeline
Towne Trust Company, N.A	138	$138K	0.04%	-100	13F-HR Timeline
CDKV HOLDINGS LLC	137	$137K	0.12%	-5	13F-HR Timeline
Roble, Belko & Company, Inc	136	$136K	0.02%	+13	13F-HR Timeline
Adalta Capital Management LLC	135	$135K	0.06%	-15	13F-HR Timeline
My Portfolio Guide, LLC	134	$133K	0.07%		13F-HR Timeline
State of Wyoming	133	$133K	0.02%	-127	13F-HR Timeline
Cornerstone Financial Management LLC	131	$131K	0.12%	+11	13F-HR/A Timeline
New England Capital Financial Advisors …	131	$130K	0.04%	0	13F-HR Timeline
Peck Wealth Management, LLC	129	$129K	0.13%	0	13F-HR Timeline
Godfrey Financial Associates, Inc.	126	$126K	0.11%	0	13F-HR Timeline
True Link Financial Advisors, LLC	125	$125K	0.01%	-129	13F-HR/A Timeline
Bruce G. Allen Investments, LLC	124	$124K	0.08%	+15	13F-HR Timeline
Moisand Fitzgerald Tamayo, LLC	120	$120K	0.01%	0	13F-HR Timeline
Smallwood Wealth Investment Management,…	116	$116K	0.06%	0	13F-HR Timeline
HALBERT HARGROVE GLOBAL ADVISORS, LLC	111	$111K	0.01%	0	13F-HR Timeline
DHJJ Financial Advisors, Ltd.	110	$110K	0.04%	-6	13F-HR Timeline
Magnolia Wealth Management, LLC	109	$109K	0.06%	new	13F-HR Timeline
TopTier Wealth Management, LLC	109	$108K	0.07%	new	13F-HR Timeline
Cherry Tree Wealth Management, LLC	109	$108K	0.02%	-41	13F-HR Timeline
Whipplewood Advisors, LLC	106	$106K	0.05%	+97	13F-HR Timeline
Quaker Wealth Management, LLC	104	$104K	0.03%	-96	13F-HR Timeline
High Point Wealth Management, LLC	103	$103K	0.1%	0	13F-HR Timeline
OBSIDIAN CIO, LLC	102	$102K	0.09%	+78	13F-HR Timeline
Miller Global Investments, LLC	102	$102K	0.09%	new	13F-HR Timeline
Holos Integrated Wealth LLC	100	$101K	0.05%	0	13F-HR Timeline
PIN OAK INVESTMENT ADVISORS INC	100	$100K	0.07%	0	13F-HR Timeline
Nexus Investment Management ULC	100	$99.6K	0.01%	0	13F-HR Timeline
Nalls Sherbakoff Group, LLC	100	$99.6K	0.07%	0	13F-HR Timeline
MARSHALL INVESTMENT MANAGEMENT, LLC	100	$99.6K	0.05%	new	13F-HR Timeline
Community Bank, N.A.	100	$99.6K	0.01%	new	13F-HR Timeline
Timmons Wealth Management, LLC	99	$98.4K	0.09%	0	13F-HR Timeline
PROFFITT & GOODSON INC	98	$97.7K	0.02%	0	13F-HR Timeline
Wealth Science Advisors LLC	112	$96.6K	0.05%	new	13F-HR Timeline
Portus Wealth Advisors, LLC	95	$94.7K	0.09%	new	13F-HR Timeline
MASECO LLP	95	$94.2K	<0.01%	-117	13F-HR Timeline
Sankala Group LLC	95	$93.5K	0.08%	0	13F-HR Timeline
STEPH & CO	92	$91.7K	0.03%	+2	13F-HR Timeline
Carolina Wealth Advisors, LLC	91	$90.7K	0.04%	+19	13F-HR Timeline
VSM Wealth Advisory, LLC	90	$89.5K	0.03%	-50	13F-HR Timeline
Lavaca Capital LLC	85	$84.7K	0.02%	0	13F-HR Timeline
Kings Path Partners LLC	84	$83.7K	0.03%	0	13F-HR/A Timeline
RHL GROUP, LLC	83	$82.8K	0.07%	0	13F-HR Timeline
GILPIN WEALTH MANAGEMENT, LLC	82	$81.7K	0.06%	0	13F-HR Timeline
Lloyd Advisory Services, LLC.	82	$81.4K	0.02%	-44	13F-HR Timeline
Kingdom Financial Group LLC.	82	$81.4K	0.02%	+15	13F-HR Timeline
Red Tortoise LLC	81	$81.1K	0.03%	0	13F-HR Timeline
Bank & Trust Co	81	$80.7K	0.05%	+10	13F-HR Timeline
Axiom Investment Management LLC	80	$79.7K	0.06%		13F-HR Timeline
SWISS RE LTDin group SWISS RE LTD	80	$79.7K	0.49%	0	13F-HR Timeline Group
Benson Wealth Management INC	77	$76.7K	0.1%	-94	13F-HR Timeline
CBIZ Investment Advisory Services, LLC	76	$75.7K	<0.01%	-95	13F-HR Timeline
Atlantic Private Wealth, LLC	75	$74.7K	0.05%	0	13F-HR Timeline
Ramirez Asset Management, Inc.	75	$74.7K	0.01%	-75	13F-HR Timeline
Bullseye Investment Management, LLC	73	$72.7K	0.04%	-92	13F-HR Timeline
Reyes Financial Architecture, Inc.	73	$72.7K	0.06%	+25	13F-HR Timeline
Friedenthal Financial	72	$71.9K	0.04%	0	13F-HR Timeline
ACIMA PRIVATE WEALTH, LLC	72	$71.7K	0.02%	0	13F-HR Timeline
Wealth Preservation Advisors, LLC	72	$71.7K	0.06%	+71	13F-HR Timeline
Kilter Group LLC	71	$70.7K	0.03%	+1	13F-HR Timeline
Napier Financial, LLC	70	$69.8K	0.02%	new	13F-HR Timeline
CLEAR INVESTMENT RESEARCH, LLC	69	$68.3K	0.11%	new	13F-HR Timeline
Synergy Investment Management, LLC	68	$67.8K	0.02%	new	13F-HR Timeline
Breakwater Investment Management	68	$67.8K	0.03%	-15	13F-HR Timeline
Aspect Partners, LLC	68	$67.8K	0.03%	-6	13F-HR Timeline
Covestor Ltd	67	$67K	0.05%	-46	13F-HR Timeline
Leo H. Evart, Inc.	67	$66.8K	0.06%		13F-HR/A Timeline
Walsh & Associates, LLC	67	$66.8K	0.07%	0	13F-HR Timeline
Sarver Vrooman Wealth Advisors	65	$64.8K	0.04%	0	13F-HR Timeline
Redwood Park Advisors LLC	62	$62.1K	0.05%	0	13F-HR Timeline
Pingora Partners LLC	62	$61.8K	0.04%	0	13F-HR Timeline
ABOUND FINANCIAL, LLC	61	$60.8K	0.03%	new	13F-HR Timeline
Frazier Financial Advisors, LLC	59	$59K	0.03%	+34	13F-HR Timeline
MPWM ADVISORY SOLUTIONS, LLC	58	$57.7K	0.03%	-83	13F-HR Timeline
Marquette Asset Management, LLC	57	$56.8K	0.01%	+55	13F-HR Timeline
RAFFA WEALTH MANAGEMENT, LLC	56	$55.8K	0.01%	+14	13F-HR Timeline
Signature Resources Capital Management,…	55	$55K	0.03%	+1	13F-HR Timeline
Evergreen Advisors, LLC	55	$54.8K	0.01%	new	13F-HR Timeline
EVOLUTION WEALTH MANAGEMENT INC.	55	$54.4K	0.04%	+4	13F-HR Timeline
Retirement Wealth Solutions LLC	54	$54.1K	0.03%	0	13F-HR Timeline
CrossGen Wealth, LLC	53	$53K	0.05%	0	13F-HR Timeline
VEGA INVESTMENT SOLUTIONS	53	$52.8K	0.01%	0	13F-HR Timeline
Morton Brown Family Wealth, LLC	52	$51.3K	0.01%	+4	13F-HR Timeline
SWAN Capital LLC	50	$49.8K	0.02%	0	13F-HR Timeline
Access Investment Management LLC	50	$49.8K	0.01%	0	13F-HR Timeline
Titan Wealth (CI) Ltdin group Titan Investment Solutions Ltd	50	$49.8K	0.02%	new	13F-HR Timeline Group
Key Capital Management, INC	49	$48.8K	0.03%	+22	13F-HR Timeline
PlanVest Financial, Inc	46	$46.1K	0.04%		13F-HR Timeline
Investors Research Corp	46	$45.8K	0.01%	0	13F-HR Timeline
Intentional Wealth Strategies, LLC	46	$45.8K	0.04%		13F-HR Timeline
PMV Capital Advisers, LLC	43	$42.8K	0.07%	-2	13F-HR Timeline
CHESAPEAKE ASSET MANAGEMENT LLC	41	$40.9K	0.03%	0	13F-HR Timeline
SRH ADVISORS, LLC	40	$39.9K	0.01%	0	13F-HR Timeline
Bay Harbor Wealth Management, LLC	40	$39.9K	0.01%	+20	13F-HR Timeline
Your Advocates Ltd., LLP	40	$39.9K	0.01%	0	13F-HR Timeline
CURIO WEALTH, LLC	40	$39.9K	0.01%	new	13F-HR Timeline
Financial Connections Group, Inc.	39	$39K	0.01%	0	13F-HR Timeline
Collier Financial	38	$37.9K	0.03%	0	13F-HR Timeline
LAM GROUP, INC.	38	$37.9K	0.02%	new	13F-HR Timeline
Penserra Capital Management LLCin group Penserra Capital Management L…	36	$35K	<0.01%	-3	13F-HR Timeline Group
MCGUIRE CAPITAL ADVISORS INC	35	$34.9K	0.02%	+3	13F-HR Timeline
MANNING & NAPIER ADVISORS LLC	34	$33.9K	<0.01%	+30	13F-HR Timeline
Hurley Capital, LLC	33	$33.2K	0.02%	+1	13F-HR Timeline
Atomic Invest LLC	32	$32.1K	0.02%	+23	13F-HR Timeline
BARRETT & COMPANY, INC.	32	$31.9K	0.01%	0	13F-HR Timeline
ROGCO, LP	32	$31.9K	0.01%	0	13F-HR Timeline
Burk Holdings LLC	32	$31.9K	0.01%	new	13F-HR Timeline
DiNuzzo Private Wealth, Inc.	31	$30.9K	<0.01%	0	13F-HR Timeline
IQ EQ FUND MANAGEMENT (SINGAPORE) PRIVA…	31	$30.9K	0.05%	0	13F-HR Timeline
Quarry LP	31	$30.9K	0.01%	-5	13F-HR Timeline
Gunpowder Capital Management, LLC dba O…	31	$30.9K	0.02%	0	13F-HR Timeline
LFA - Lugano Financial Advisors SA	31	$30.8K	0.02%	0	13F-HR Timeline
Meramec Financial Planners, LLC	30	$29.9K	0.01%	0	13F-HR Timeline
C M BIDWELL & ASSOCIATES LTD	30	$29.9K	0.01%	0	13F-HR Timeline
Principia Wealth Advisory, LLC	30	$29.9K	0.02%	+9	13F-HR Timeline
Kentucky Trust Co	30	$29.9K	0.02%	-25	13F-HR Timeline
TD Capital Management LLC	29	$29.1K	<0.01%	+22	13F-HR Timeline
HFM Investment Advisors, LLC	29	$28.9K	0.01%	+1	13F-HR Timeline
Virginia Estate & Retirement Planning A…	28	$27.9K	0.05%		13F-HR Timeline
Minot DeBlois Advisors LLC	28	$27.6K	0.03%	0	13F-HR Timeline
Luken Investment Analytics, LLC	27	$26.9K	0.01%	0	13F-HR Timeline
MJT & Associates Financial Advisory Gro…	27	$26.9K	0.02%	0	13F-HR Timeline
AXS Investments LLC	25	$24.9K	0.01%	-6	13F-HR Timeline
Brown Shipley& Co Ltd	25	$24.9K	0.01%	0	13F-HR Timeline
Horizons Wealth Management	25	$24.9K	0.02%	new	13F-HR Timeline
North Ridge Wealth Advisors, Inc.	25	$24.9K	0.01%	0	13F-HR Timeline
Bulwark Capital Corp	25	$24.9K	0.02%	0	13F-HR Timeline
Turim 21 Investimentos Ltda.	24	$23.9K	0.01%	new	13F-HR Timeline
ENTRUST FINANCIAL LLC	23	$23K	0.02%	-13	13F-HR Timeline
Sellwood Investment Partners LLC	21	$20.9K	0.01%	0	13F-HR Timeline
IFS Advisors, LLC	21	$20.9K	0.01%	+2	13F-HR Timeline
Mechanics Financial Corp	21	$20.9K	0.01%	0	13F-HR Timeline
PayPay Securities Corp	21	$20.7K	0.72%	-1	13F-HR Timeline
Fairway Wealth LLC	21	$20.6K	0.01%	-2	13F-HR Timeline
MH & ASSOCIATES SECURITIES MANAGEMENT C…	20	$19.9K	0.02%	0	13F-HR Timeline
Catherine Avery Investment Management L…	20	$19.9K	0.01%	0	13F-HR Timeline
PROTECTIVE LIFE CORP	19	$18.9K	0.06%	new	13F-HR Timeline
WestEnd Advisors, LLC	19	$18.9K	<0.01%	0	13F-HR Timeline
Basepoint Wealth LLC	18	$18K	0.01%	0	13F-HR Timeline
Imprint Wealth LLC	18	$17.9K	0.08%	-5	13F-HR Timeline
United Financial Planning Group LLC	18	$17.9K	0.01%	0	13F-HR Timeline
Financial Freedom, LLC	17	$17.3K	0.01%	0	13F-HR Timeline
Torren Management, LLC	14	$14K	0.01%	-55	13F-HR Timeline
LONGFELLOW INVESTMENT MANAGEMENT CO LLC	13	$13K	<0.01%	0	13F-HR Timeline
NorthAvenue LLC	13	$13K	0.01%	0	13F-HR Timeline
Bare Financial Services, Inc	12	$12K	<0.01%	+6	13F-HR Timeline
Clal Insurance Enterprises Holdings Ltdin group Clal Insurance Enterprises Ho…	11	$11K	<0.01%	+1	13F-HR Timeline Group
MORGAN DEMPSEY CAPITAL MANAGEMENT LLC	11	$11K	<0.01%	0	13F-HR Timeline
Lummis Asset Management, LP	10	$9.96K	0.01%	0	13F-HR Timeline
1620 INVESTMENT ADVISORS, INC.	9	$9.56K	0.01%	-4	13F-HR Timeline
Prudent Man Investment Management, Inc.	11	$9.49K	<0.01%	0	13F-HR Timeline
Three Bearings Fiduciary Advisors, Inc.	9	$8.97K	0.01%	-24	13F-HR Timeline
Monetary Solutions, Ltd	5	$4.98K	<0.01%	-1	13F-HR Timeline
BURKETT FINANCIAL SERVICES, LLC	4	$4.01K	<0.01%	0	13F-HR Timeline
Phillip James Consulting Co.	5	$4K	<0.01%	new	13F-HR Timeline
Itau Unibanco Holding S.A.in group Itau Unibanco Holding S.A.	4	$3.99K	<0.01%	-65	13F-HR/A Timeline Group
DecisionPoint Financial, LLC	4	$3.99K	<0.01%	0	13F-HR Timeline
Horrell Capital Management, Inc.	3	$3.06K	<0.01%	0	13F-HR Timeline
FIDUCIARY ADVISORS, INC.	3	$2.99K	<0.01%	0	13F-HR Timeline
Cohalo Advisory LLC	3	$2.99K	0.21%	0	13F-HR Timeline
BROADWATER CAPITAL MANAGEMENT LLC	3	$2.59K	<0.01%	0	13F-HR Timeline
INVESTMENT COUNSEL CO OF NEVADA	2	$1.99K	<0.01%	0	13F-HR Timeline
Capital Advisor Network LLC	2	$1.99K	<0.01%		13F-HR/A Timeline
Navigoe, LLC	2	$1K	<0.01%	0	13F-HR Timeline
Nvest Wealth Strategies, Inc.	1	$997	<0.01%	-17	13F-HR Timeline
ROSS\JOHNSON & Associates LLC	1	$996	0.02%	-1	13F-HR Timeline
HORIZON FINANCIAL SERVICES, LLC	0	$0	0%	0	13F-HR TimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.
Evolution Advisers, Inc.	0	$0	0%	0	13F-HR TimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.
DIAMANT ASSET MANAGEMENT, INC.	6,726,899	$6.73M		+6,720,130	13F-HR TimelineValue about 1/1,000 of the price other filers imply, kept as filed and left out of ratios.
LM Advisors LLC	5,352	$5.37K		+732	13F-HR TimelineValue about 1/1,000 of the price other filers imply, kept as filed and left out of ratios.
WBI INVESTMENTS, LLCgroup of 2 filers holding	0			new	Timeline MILLINGTON SECURITIES, LLC: 865 (0.24%) , in WBI INVESTMENTS, LLC's report, not added 13F-HR WBI INVESTMENTS, LLC: 865 (0.24%) , in MILLINGTON SECURITIES, LLC's report, not added 13F-HR

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