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Nasdaq · USD

COST

COSTCO WHOLESALE CORP /NEW

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Tapewire entity
2803
SEC CIK
0000909832
Parsed reports
1,904

Last 12 months

Inside the activity.

0 purchase rows · 13 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 202501
Dec 202502
Jan 202604
Feb 202600
Mar 202601
Apr 202601
May 202600
Jun 202601
Jul 202600
Aug 202600
Sep 202602
Oct 202601

Latest available

Insider transactions

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
October 22, 2025 Filed Oct 24, 2025 23:12 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 121.78 $944.68 $115,043.13
Disclosure

SEC source: 0000909832-25-000126 · form4.xml · nonDerivative · entry 1

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,134.057

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:14 UTC
Callans Patrick JExecutive Vice President
Tax withholdingCommon Stock 110.57 $944.68 $104,453.27
Disclosure

SEC source: 0000909832-25-000128 · form4.xml · nonDerivative · entry 5

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,894.558

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:14 UTC
Callans Patrick JExecutive Vice President
Tax withholdingCommon Stock 176.66 $944.68 $166,887.17
Disclosure

SEC source: 0000909832-25-000128 · form4.xml · nonDerivative · entry 4

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,005.128

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:14 UTC
Callans Patrick JExecutive Vice President
Tax withholdingCommon Stock 198.69 $944.68 $187,698.47
Disclosure

SEC source: 0000909832-25-000128 · form4.xml · nonDerivative · entry 3

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,181.788

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:14 UTC
Callans Patrick JExecutive Vice President
Tax withholdingCommon Stock 191.08 $944.68 $180,509.45
Disclosure

SEC source: 0000909832-25-000128 · form4.xml · nonDerivative · entry 2

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,380.478

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:14 UTC
Callans Patrick JExecutive Vice President
Tax withholdingCommon Stock 239.95 $944.68 $226,675.97
Disclosure

SEC source: 0000909832-25-000128 · form4.xml · nonDerivative · entry 1

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,571.558

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:17 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 705.75 $944.68 $666,707.91
Disclosure

SEC source: 0000909832-25-000130 · form4.xml · nonDerivative · entry 5

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,515.004

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:17 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 901.26 $944.68 $851,402.30
Disclosure

SEC source: 0000909832-25-000130 · form4.xml · nonDerivative · entry 4

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,220.754

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:17 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 758.28 $944.68 $716,331.95
Disclosure

SEC source: 0000909832-25-000130 · form4.xml · nonDerivative · entry 3

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,122.014

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:17 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 247.66 $944.68 $233,959.45
Disclosure

SEC source: 0000909832-25-000130 · form4.xml · nonDerivative · entry 2

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,880.294

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:17 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 155.74 $944.68 $147,124.46
Disclosure

SEC source: 0000909832-25-000130 · form4.xml · nonDerivative · entry 1

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,127.954

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:20 UTC
Klauer James CExecutive Vice President
Tax withholdingCommon Stock 110.97 $944.68 $104,831.14
Disclosure

SEC source: 0000909832-25-000132 · form4.xml · nonDerivative · entry 5

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,336.987

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:20 UTC
Klauer James CExecutive Vice President
Tax withholdingCommon Stock 177.06 $944.68 $167,265.04
Disclosure

SEC source: 0000909832-25-000132 · form4.xml · nonDerivative · entry 4

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,447.957

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:20 UTC
Klauer James CExecutive Vice President
Tax withholdingCommon Stock 198.69 $944.68 $187,698.47
Disclosure

SEC source: 0000909832-25-000132 · form4.xml · nonDerivative · entry 3

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,625.017

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:20 UTC
Klauer James CExecutive Vice President
Tax withholdingCommon Stock 190.68 $944.68 $180,131.58
Disclosure

SEC source: 0000909832-25-000132 · form4.xml · nonDerivative · entry 2

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,823.707

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:20 UTC
Klauer James CExecutive Vice President
Tax withholdingCommon Stock 239.95 $944.68 $226,675.97
Disclosure

SEC source: 0000909832-25-000132 · form4.xml · nonDerivative · entry 1

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,014.387

F1 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:23 UTC
MILLERCHIP GARYExecutive Vice President
Tax withholdingCommon Stock 500.32 $944.68 $472,642.30
Disclosure

SEC source: 0000909832-25-000134 · form4.xml · nonDerivative · entry 3

MILLERCHIP GARY · CIK 0001771770 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,619.323

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:23 UTC
MILLERCHIP GARYExecutive Vice President
Tax withholdingCommon Stock 313.05 $944.68 $295,732.07
Disclosure

SEC source: 0000909832-25-000134 · form4.xml · nonDerivative · entry 2

MILLERCHIP GARY · CIK 0001771770 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,119.643

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:23 UTC
MILLERCHIP GARYExecutive Vice President
GrantCommon Stock 6,268 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000134 · form4.xml · nonDerivative · entry 1

MILLERCHIP GARY · CIK 0001771770 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,432.693

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company.

F2 · price: Not applicable. Grant of Restricted Stock Units.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:27 UTC
POLIT JAVIERExecutive Vice President
Tax withholdingCommon Stock 336.61 $944.68 $317,988.73
Disclosure

SEC source: 0000909832-25-000137 · form4.xml · nonDerivative · entry 4

POLIT JAVIER · CIK 0001852700 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,796.901

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:27 UTC
POLIT JAVIERExecutive Vice President
Tax withholdingCommon Stock 293.89 $944.68 $277,632.01
Disclosure

SEC source: 0000909832-25-000137 · form4.xml · nonDerivative · entry 3

POLIT JAVIER · CIK 0001852700 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,133.511

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:27 UTC
POLIT JAVIERExecutive Vice President
Tax withholdingCommon Stock 537.78 $944.68 $508,030.01
Disclosure

SEC source: 0000909832-25-000137 · form4.xml · nonDerivative · entry 2

POLIT JAVIER · CIK 0001852700 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,427.401

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:27 UTC
POLIT JAVIERExecutive Vice President
GrantCommon Stock 4,219 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000137 · form4.xml · nonDerivative · entry 1

POLIT JAVIER · CIK 0001852700 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,965.181

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company.

F2 · price: Not applicable. Grant of Restricted Stock Units.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:30 UTC Tax withholdingCommon Stock 365.96 $944.68 $345,715.09
Disclosure

SEC source: 0000909832-25-000140 · form4.xml · nonDerivative · entry 6

Sullivan John Christopher · CIK 0001902272 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,671.152

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:30 UTC Tax withholdingCommon Stock 584.85 $944.68 $552,496.10
Disclosure

SEC source: 0000909832-25-000140 · form4.xml · nonDerivative · entry 5

Sullivan John Christopher · CIK 0001902272 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,037.112

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:30 UTC Tax withholdingCommon Stock 568.89 $944.68 $537,419.01
Disclosure

SEC source: 0000909832-25-000140 · form4.xml · nonDerivative · entry 4

Sullivan John Christopher · CIK 0001902272 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,621.962

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:30 UTC Tax withholdingCommon Stock 572.83 $944.68 $541,141.04
Disclosure

SEC source: 0000909832-25-000140 · form4.xml · nonDerivative · entry 3

Sullivan John Christopher · CIK 0001902272 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,190.852

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:30 UTC Tax withholdingCommon Stock 421.01 $944.68 $397,719.73
Disclosure

SEC source: 0000909832-25-000140 · form4.xml · nonDerivative · entry 2

Sullivan John Christopher · CIK 0001902272 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,763.682

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:30 UTC GrantCommon Stock 4,654 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000140 · form4.xml · nonDerivative · entry 1

Sullivan John Christopher · CIK 0001902272 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,184.692

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

F2 · price: Not applicable. Grant of Restricted Stock Units.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:32 UTC
Vachris Roland MichaelDirector · President and CEO
Tax withholdingCommon Stock 1,159.75 $944.68 $1,095,592.63
Disclosure

SEC source: 0000909832-25-000142 · form4.xml · nonDerivative · entry 3

Vachris Roland Michael · CIK 0001679566 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,258.062

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:32 UTC
Vachris Roland MichaelDirector · President and CEO
Tax withholdingCommon Stock 1,493.05 $944.68 $1,410,454.47
Disclosure

SEC source: 0000909832-25-000142 · form4.xml · nonDerivative · entry 2

Vachris Roland Michael · CIK 0001679566 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,417.812

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:32 UTC
Vachris Roland MichaelDirector · President and CEO
GrantCommon Stock 13,834 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000142 · form4.xml · nonDerivative · entry 1

Vachris Roland Michael · CIK 0001679566 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,910.862

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company.

F2 · price: Not applicable. Grant of Restricted Stock Units.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
Tax withholdingCommon Stock 84.6 $944.68 $79,919.93
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 6

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,394.83

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
Tax withholdingCommon Stock 135.4 $944.68 $127,909.67
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 5

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,479.43

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
Tax withholdingCommon Stock 118.56 $944.68 $112,001.26
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 4

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,614.83

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
Tax withholdingCommon Stock 90.23 $944.68 $85,238.48
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 3

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,733.39

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
Tax withholdingCommon Stock 113.53 $944.68 $107,249.52
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 2

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,823.62

F3 · price: This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
GrantCommon Stock 2,118 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 1

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,937.15

F1 · shares: Grant of Restricted Stock Units. Vests one-fifth on October 22, 2026, and one-fifth annually on October 22 for the following four years. In addition, under the Stock Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

F2 · price: Not applicable. Grant of Restricted Stock Units.

Read SEC document
September 29, 2025 Filed Sep 30, 2025 20:54 UTC
Frates CatonExecutive Vice President
SaleCommon Stock 1,540 $910.02 $1,401,430.80
Disclosure

SEC source: 0000909832-25-000095 · form4.xml · nonDerivative · entry 1

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,283.694

Read SEC document
September 29, 2025 Filed Oct 1, 2025 21:00 UTC
Miller Russell DSr. Executive Vice President
SaleCommon Stock 3,381 $915.00 $3,093,615.00
Disclosure

SEC source: 0000909832-25-000097 · form4.xml · nonDerivative · entry 1

Miller Russell D · CIK 0001729741 · Sr. Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Indirect · Miller Family Trust

Disclosed balance after: 9,740

F1 · balance_after: Represents one (1) share transferred from direct to indirect holdings inadvertently omitted from the Form 4 filed on September 24, 2025.

Read SEC document
September 23, 2025 Filed Sep 24, 2025 20:17 UTC
Miller Russell DSr. Executive Vice President
GiftCommon Stock 2,918 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000090 · form4.xml · nonDerivative · entry 2

Miller Russell D · CIK 0001729741 · Sr. Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Indirect · Miller Family Trust

Disclosed balance after: 13,120

Read SEC document
September 23, 2025 Filed Sep 24, 2025 20:17 UTC
Miller Russell DSr. Executive Vice President
GiftCommon Stock 2,918 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000090 · form4.xml · nonDerivative · entry 1

Miller Russell D · CIK 0001729741 · Sr. Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1.925

Read SEC document
September 10, 2025 Filed Sep 12, 2025 21:33 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 949.666 $956.29 $908,156.10
Disclosure

SEC source: 0000909832-25-000072 · form4.xml · nonDerivative · entry 2

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,255.837

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September 10, 2025 Filed Sep 12, 2025 21:33 UTC
Adamo ClaudineExecutive Vice President
GrantCommon Stock 4,219 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000072 · form4.xml · nonDerivative · entry 1

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,205.503

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

F2 · price: Not applicable. Grant of Restricted Stock Units.

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September 10, 2025 Filed Sep 12, 2025 21:36 UTC
Callans Patrick JExecutive Vice President
Tax withholdingCommon Stock 949.666 $956.29 $908,156.10
Disclosure

SEC source: 0000909832-25-000074 · form4.xml · nonDerivative · entry 2

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,811.508

F3 · balance_after: Upon a previous transfer of shares from one broker to another broker, a fractional share of .563 was liquidated by the broker transferring the shares due to an administrative inability to hold a fractional share in the account. Therefore, the total owned has been reduced by such amount.

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September 10, 2025 Filed Sep 12, 2025 21:36 UTC
Callans Patrick JExecutive Vice President
GrantCommon Stock 4,219 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000074 · form4.xml · nonDerivative · entry 1

Callans Patrick J · CIK 0001764273 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,761.174

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

F2 · price: Not applicable. Grant of Restricted Stock Units.

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September 10, 2025 Filed Sep 12, 2025 21:40 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 1,271.078 $956.29 $1,215,519.18
Disclosure

SEC source: 0000909832-25-000076 · form4.xml · nonDerivative · entry 2

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,823.694

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September 10, 2025 Filed Sep 12, 2025 21:40 UTC
Frates CatonExecutive Vice President
GrantCommon Stock 4,219 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000076 · form4.xml · nonDerivative · entry 1

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,094.772

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

F2 · price: Not applicable. Grant of Restricted Stock Units.

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September 10, 2025 Filed Sep 12, 2025 21:43 UTC
Jones Teresa A.Executive Vice President
Tax withholdingCommon Stock 1,503.321 $956.29 $1,437,610.84
Disclosure

SEC source: 0000909832-25-000078 · form4.xml · nonDerivative · entry 2

Jones Teresa A. · CIK 0002031064 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,077.804

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September 10, 2025 Filed Sep 12, 2025 21:43 UTC
Jones Teresa A.Executive Vice President
GrantCommon Stock 4,219 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000078 · form4.xml · nonDerivative · entry 1

Jones Teresa A. · CIK 0002031064 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,581.125

F1 · shares: Grant was initially made on October 22, 2024, subject to performance conditions concerning fiscal 2025, which have been deemed satisfied by the Compensation Committee of the Board of Directors. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% vest over each of the ensuing four years based on continued employment with the Company. In addition, under the 2019 Incentive Plan, employees are eligible for accelerated vesting upon the anniversary of their 25th, 30th and 35th years of service.

F2 · price: Not applicable. Grant of Restricted Stock Units.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.