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NasdaqGS · Consumer Staples · Holders

Costco Wholesale Corp (COST) Institutional Ownership & Insider Trading History

Recent insider purchases and sales for COST from Form 4 filings. Institutional holdings surface here when ownership sources publish.

Section freshness

Price Jun 26, 4:00 PM EDT · Statements May 30, 8:00 PM EDT

Source timingDetails

Data freshness

Prices update fastest. Fundamentals, analyst data, and news update on their own schedules, so check these timestamps before comparing signals.

Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.

PriceLive
Last traded •
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Fundamentalsevery 1 day
Provider checked •
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Analystevery 1 hr
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Newsevery 15 min
Latest item •
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Ownership read

COST insider sentiment: Net selling.

15 sales and 0 purchases appear in the recent Form 4 filings. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.

Review insider tradesView institutions

Insider flow

COST

Purchases—
Sales139.88K

Directional bars ignore awards, gifts, conversions, and tax withholding rows.

Top holder

—

Institutional data pending

Insider stance

Net selling

$130.42M sold / — bought

Latest filing

Apr 1, 2026

Most recent holder or insider filing date

Filings shown

94

0 holder / 94 insider

Holder rows
Pending
Market data source
Latest filing
Apr 1, 2026
Most recent holder or insider filing date
Increased / initiated
Pending
0 decreased
Insider rows
94
Market data source

Recent insider transactions

Costco Wholesale Corp (COST) Form 4 filings

Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.

Frates Caton

SaleOpen-market or direct sale reported on Form 4.
Shares
5.82K
% company
<0.01%
Price
$993.00
Value
$5,774,295

Filed Apr 1, 2026

George Sarah Catherine

IProvider-supplied Form 4 action code. Review the original filing before making a trading judgment.
Shares
—
% company
—
Price
$991.21
Value
Not reported

Filed Mar 12, 2026

MILLERCHIP GARY

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
15.46K
% company
<0.01%
Price
$992.23
Value
$15,344,837

Filed Mar 11, 2026

Adamo Claudine

SaleOpen-market or direct sale reported on Form 4.
Shares
6.12K
% company
<0.01%
Price
$1,003
Value
$6,139,492

Filed Mar 9, 2026

Jones Teresa A.

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
3.93K
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Jan 27, 2026

RAIKES JEFFREY S

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
11.29K
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Jan 27, 2026

Jones Teresa A.

SaleOpen-market or direct sale reported on Form 4.
Shares
4.23K
% company
<0.01%
Price
$986.26
Value
$4,169,893

Filed Jan 21, 2026

Raimondo Gina Marie

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
215
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Jan 16, 2026

DECKER SUSAN L

SaleOpen-market or direct sale reported on Form 4.
Shares
8.53K
% company
<0.01%
Price
$955.00
Value
$8,148,060

Filed Jan 16, 2026

Klauer James C

SaleOpen-market or direct sale reported on Form 4.
Shares
44.84K
% company
0.01%
Price
$939.00
Value
$42,101,943

Filed Jan 14, 2026

Miller Russell D

SaleOpen-market or direct sale reported on Form 4.
Shares
8.24K
% company
<0.01%
Price
$916.32
Value
$7,550,477

Filed Jan 9, 2026

POLIT JAVIER

SaleOpen-market or direct sale reported on Form 4.
Shares
10.19K
% company
<0.01%
Price
$862.90
Value
$8,792,900

Filed Dec 30, 2025

POLIT JAVIER

SaleOpen-market or direct sale reported on Form 4.
Shares
10.75K
% company
<0.01%
Price
$867.21
Value
$9,320,724

Filed Dec 29, 2025

DENMAN KENNETH D

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
5.66K
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Dec 19, 2025

DECKER SUSAN L

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
8.99K
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Dec 15, 2025

RAIKES JEFFREY S

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
16.41K
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Nov 10, 2025

Wilcox William Richard

SaleOpen-market or direct sale reported on Form 4.
Shares
2.00K
% company
<0.01%
Price
$930.13
Value
$1,860,260

Filed Nov 7, 2025

Barbre Tiffany Marie

SaleOpen-market or direct sale reported on Form 4.
Shares
5.16K
% company
<0.01%
Price
$934.62
Value
$4,817,968

Filed Oct 24, 2025

Adamo Claudine

SaleOpen-market or direct sale reported on Form 4.
Shares
6.85K
% company
<0.01%
Price
$935.68
Value
$6,410,344

Filed Oct 24, 2025

STANTON JOHN W

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
24.09K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

Barbre Tiffany Marie

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
6.39K
% company
<0.01%
Price
$944.68
Value
$6,041,229

Filed Oct 22, 2025

Barbre Tiffany Marie

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
6.48K
% company
<0.01%
Price
$944.68
Value
$6,120,582

Filed Oct 22, 2025

Barbre Tiffany Marie

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
6.62K
% company
<0.01%
Price
$944.68
Value
$6,249,058

Filed Oct 22, 2025

Barbre Tiffany Marie

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
6.73K
% company
<0.01%
Price
$944.68
Value
$6,360,530

Filed Oct 22, 2025

Barbre Tiffany Marie

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
6.82K
% company
<0.01%
Price
$944.68
Value
$6,446,496

Filed Oct 22, 2025

Barbre Tiffany Marie

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
6.94K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

Frates Caton

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
6.51K
% company
<0.01%
Price
$944.68
Value
$6,154,590

Filed Oct 22, 2025

Frates Caton

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
7.22K
% company
<0.01%
Price
$944.68
Value
$6,821,534

Filed Oct 22, 2025

Frates Caton

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
8.12K
% company
<0.01%
Price
$944.68
Value
$7,672,691

Filed Oct 22, 2025

Frates Caton

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
8.88K
% company
<0.01%
Price
$944.68
Value
$8,388,758

Filed Oct 22, 2025

Frates Caton

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
9.13K
% company
<0.01%
Price
$944.68
Value
$8,623,039

Filed Oct 22, 2025

Adamo Claudine

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
9.55K
% company
<0.01%
Price
$944.68
Value
$9,022,639

Filed Oct 22, 2025

Adamo Claudine

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
9.66K
% company
<0.01%
Price
$944.68
Value
$9,127,498

Filed Oct 22, 2025

Adamo Claudine

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
9.84K
% company
<0.01%
Price
$944.68
Value
$9,293,762

Filed Oct 22, 2025

Adamo Claudine

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
10.04K
% company
<0.01%
Price
$944.68
Value
$9,481,753

Filed Oct 22, 2025

Adamo Claudine

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
10.13K
% company
<0.01%
Price
$944.68
Value
$9,573,387

Filed Oct 22, 2025

Sullivan John Christopher

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
47.67K
% company
0.01%
Price
$944.68
Value
$45,033,840

Filed Oct 22, 2025

Sullivan John Christopher

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
48.04K
% company
0.01%
Price
$944.68
Value
$45,379,593

Filed Oct 22, 2025

Sullivan John Christopher

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
48.62K
% company
0.01%
Price
$944.68
Value
$45,932,231

Filed Oct 22, 2025

Sullivan John Christopher

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
49.19K
% company
0.01%
Price
$944.68
Value
$46,469,754

Filed Oct 22, 2025

Sullivan John Christopher

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
49.76K
% company
0.01%
Price
$944.68
Value
$47,011,056

Filed Oct 22, 2025

Sullivan John Christopher

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
50.19K
% company
0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

POLIT JAVIER

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
12.80K
% company
<0.01%
Price
$944.68
Value
$12,089,070

Filed Oct 22, 2025

POLIT JAVIER

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
13.13K
% company
<0.01%
Price
$944.68
Value
$12,407,427

Filed Oct 22, 2025

POLIT JAVIER

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
13.43K
% company
<0.01%
Price
$944.68
Value
$12,684,218

Filed Oct 22, 2025

POLIT JAVIER

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
13.96K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

MILLERCHIP GARY

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
16.62K
% company
<0.01%
Price
$944.68
Value
$15,699,637

Filed Oct 22, 2025

MILLERCHIP GARY

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
17.12K
% company
<0.01%
Price
$944.68
Value
$16,172,922

Filed Oct 22, 2025

MILLERCHIP GARY

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
17.43K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

Callans Patrick J

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
60.90K
% company
0.01%
Price
$944.68
Value
$57,526,289

Filed Oct 22, 2025

Callans Patrick J

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
61.01K
% company
0.01%
Price
$944.68
Value
$57,630,203

Filed Oct 22, 2025

Callans Patrick J

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
61.18K
% company
0.01%
Price
$944.68
Value
$57,797,412

Filed Oct 22, 2025

Callans Patrick J

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
61.38K
% company
0.01%
Price
$944.68
Value
$57,984,458

Filed Oct 22, 2025

Callans Patrick J

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
61.57K
% company
0.01%
Price
$944.68
Value
$58,165,837

Filed Oct 22, 2025

Klauer James C

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
46.34K
% company
0.01%
Price
$944.68
Value
$43,773,637

Filed Oct 22, 2025

Klauer James C

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
46.45K
% company
0.01%
Price
$944.68
Value
$43,878,497

Filed Oct 22, 2025

Klauer James C

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
46.63K
% company
0.01%
Price
$944.68
Value
$44,045,705

Filed Oct 22, 2025

Klauer James C

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
46.82K
% company
0.01%
Price
$944.68
Value
$44,233,696

Filed Oct 22, 2025

Klauer James C

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
47.01K
% company
0.01%
Price
$944.68
Value
$44,413,186

Filed Oct 22, 2025

Vachris Roland Michael

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
52.26K
% company
0.01%
Price
$944.68
Value
$49,367,087

Filed Oct 22, 2025

Vachris Roland Michael

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
53.42K
% company
0.01%
Price
$944.68
Value
$50,462,916

Filed Oct 22, 2025

Vachris Roland Michael

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
54.91K
% company
0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

Foulkes Helena

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
1.09K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

DENMAN KENNETH D

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
5.99K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

JAMES HAMILTON E

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
55.54K
% company
0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

DECKER SUSAN L

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
11.82K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

RAIKES JEFFREY S

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
20.53K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

Wilderotter Mary Agnes

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
3.21K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

JEWELL SARAH MR SALLY

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
3.61K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Oct 22, 2025

Miller Russell D

SaleOpen-market or direct sale reported on Form 4.
Shares
9.74K
% company
<0.01%
Price
$915.00
Value
$8,912,100

Filed Sep 29, 2025

Frates Caton

SaleOpen-market or direct sale reported on Form 4.
Shares
9.28K
% company
<0.01%
Price
$910.02
Value
$8,448,626

Filed Sep 29, 2025

Miller Russell D

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
13.12K
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Sep 23, 2025

Miller Russell D

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
2
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Sep 23, 2025

Jones Teresa A.

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
5.08K
% company
<0.01%
Price
$956.29
Value
$4,856,041

Filed Sep 10, 2025

Jones Teresa A.

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
6.58K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Frates Caton

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
10.82K
% company
<0.01%
Price
$956.29
Value
$10,350,883

Filed Sep 10, 2025

Frates Caton

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
12.10K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Riel Pierre

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
11.26K
% company
<0.01%
Price
$956.29
Value
$10,764,000

Filed Sep 10, 2025

Riel Pierre

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
12.86K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Adamo Claudine

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
10.26K
% company
<0.01%
Price
$956.29
Value
$9,807,710

Filed Sep 10, 2025

Adamo Claudine

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
11.21K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Rubanenko Yoram

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
8.25K
% company
<0.01%
Price
$956.29
Value
$7,886,524

Filed Sep 10, 2025

Rubanenko Yoram

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
9.99K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Callans Patrick J

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
61.81K
% company
0.01%
Price
$956.29
Value
$59,110,197

Filed Sep 10, 2025

Callans Patrick J

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
62.76K
% company
0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Miller Russell D

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
2.92K
% company
<0.01%
Price
$956.29
Value
$2,792,367

Filed Sep 10, 2025

Miller Russell D

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
4.66K
% company
<0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

Klauer James C

Tax withholdingShares withheld to cover tax obligations. Usually administrative, not an open-market sale.
Shares
47.25K
% company
0.01%
Price
$956.29
Value
$45,188,528

Filed Sep 10, 2025

Klauer James C

Award / grantAward, grant, or acquisition under an equity compensation plan.
Shares
48.21K
% company
0.01%
Price
No cash value
Value
No cash value

Filed Sep 10, 2025

STANTON JOHN W

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
211
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Sep 2, 2025

STANTON JOHN W

GiftGift transfer. Usually non-cash and not an open-market sale.
Shares
211
% company
<0.01%
Price
Non-cash
Value
Non-cash

Filed Sep 2, 2025

Jones Teresa A.

SaleOpen-market or direct sale reported on Form 4.
Shares
2.36K
% company
<0.01%
Price
$992.05
Value
$2,343,222

Filed Aug 20, 2025

Showing 92 of 94 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders

Frequently asked

Common questions.

Who are the largest COST shareholders?

Costco Wholesale Corp (COST) institutional holders are ranked by reported share count when ownership data publishes filing rows.

What is institutional ownership of COST?

Costco Wholesale Corp (COST) institutional ownership appears when filing-based market data returns holder rows. TECHi does not fill unavailable ownership fields with placeholder shareholders.

Where can I see Costco Wholesale Corp insider transactions?

Costco Wholesale Corp (COST) has 94 Form 4 insider transactions on file, most recently on Apr 1, 2026, separated into purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are distinguished from open-market trades.

Are COST insiders buying or selling?

Recent COST insider activity reads Net selling: 15 sales and 0 purchases. Awards, gifts, conversions, and tax withholding are listed separately because they do not carry the same signal as open-market trades.

Who is the most active COST insider?

Callans Patrick J is the most active COST insider by absolute share movement, with 430,607 shares moving across the filing history. Review the action labels before treating that activity as buying or selling.