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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 13, 2026 Filed Oct 14, 2026 23:00 UTC
Wilcox William RichardExecutive Vice President
SaleCommon Stock 1,100 $958.21 $1,054,025.50
Disclosure

SEC source: 0000909832-26-000098 · form4.xml · nonDerivative · entry 1

Wilcox William Richard · CIK 0002087546 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,094.391

Read SEC document
September 29, 2026 Filed Sep 30, 2026 21:52 UTC
Frates CatonSr. Executive Vice President
SaleCommon Stock 800.638 $915.93 $733,328.36
Disclosure

SEC source: 0000909832-26-000090 · form4.xml · nonDerivative · entry 1

Frates Caton · CIK 0001928633 · Sr. Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,912

Read SEC document
September 29, 2026 Filed Sep 30, 2026 21:48 UTC
Adamo ClaudineExecutive Vice President
SaleCommon Stock 2,200 $915.93 $2,015,046.00
Disclosure

SEC source: 0000909832-26-000088 · form4.xml · nonDerivative · entry 1

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,133.51

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:30 UTC
Wilcox William RichardExecutive Vice President
Tax withholdingCommon Stock 1,934.609 $902.38 $1,745,752.47
Disclosure

SEC source: 0000909832-26-000080 · form4.xml · nonDerivative · entry 2

Wilcox William Richard · CIK 0002087546 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,194.391

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:30 UTC
Wilcox William RichardExecutive Vice President
GrantCommon Stock 4,129 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000080 · form4.xml · nonDerivative · entry 1

Wilcox William Richard · CIK 0002087546 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,129

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
September 10, 2026 Filed Sep 14, 2026 21:28 UTC
Rubanenko YoramExecutive Vice President
Tax withholdingCommon Stock 1,695.952 $902.38 $1,530,393.17
Disclosure

SEC source: 0000909832-26-000078 · form4.xml · nonDerivative · entry 2

Rubanenko Yoram · CIK 0001886447 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,680.167

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:28 UTC
Rubanenko YoramExecutive Vice President
GrantCommon Stock 4,129 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000078 · form4.xml · nonDerivative · entry 1

Rubanenko Yoram · CIK 0001886447 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,376.119

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
September 10, 2026 Filed Sep 14, 2026 21:25 UTC
Riel PierreExecutive Vice President
Tax withholdingCommon Stock 1,561.66 $902.38 $1,409,210.75
Disclosure

SEC source: 0000909832-26-000076 · form4.xml · nonDerivative · entry 2

Riel Pierre · CIK 0001916969 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,246.225

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:25 UTC
Riel PierreExecutive Vice President
GrantCommon Stock 4,552 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000076 · form4.xml · nonDerivative · entry 1

Riel Pierre · CIK 0001916969 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,807.885

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
September 10, 2026 Filed Sep 14, 2026 21:23 UTC
Klauer James CExecutive Vice President
Tax withholdingCommon Stock 936.115 $902.38 $844,731.45
Disclosure

SEC source: 0000909832-26-000074 · form4.xml · nonDerivative · entry 2

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,029.879

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:23 UTC
Klauer James CExecutive Vice President
GrantCommon Stock 4,129 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000074 · form4.xml · nonDerivative · entry 1

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,965.994

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
September 10, 2026 Filed Sep 14, 2026 21:22 UTC
Jones Teresa A.Executive Vice President
Tax withholdingCommon Stock 1,458.535 $902.38 $1,316,152.81
Disclosure

SEC source: 0000909832-26-000072 · form4.xml · nonDerivative · entry 2

Jones Teresa A. · CIK 0002031064 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,598.269

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:22 UTC
Jones Teresa A.Executive Vice President
GrantCommon Stock 4,129 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000072 · form4.xml · nonDerivative · entry 1

Jones Teresa A. · CIK 0002031064 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,056.804

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
September 10, 2026 Filed Sep 14, 2026 21:20 UTC
Frates CatonExecutive Vice President
Tax withholdingCommon Stock 1,654.363 $902.38 $1,492,864.08
Disclosure

SEC source: 0000909832-26-000070 · form4.xml · nonDerivative · entry 2

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,712.638

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:20 UTC
Frates CatonExecutive Vice President
GrantCommon Stock 4,552 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000070 · form4.xml · nonDerivative · entry 1

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,367.001

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
September 10, 2026 Filed Sep 14, 2026 21:17 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 916.685 $902.38 $827,198.21
Disclosure

SEC source: 0000909832-26-000068 · form4.xml · nonDerivative · entry 2

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,333.51

Read SEC document
September 10, 2026 Filed Sep 14, 2026 21:17 UTC
Adamo ClaudineExecutive Vice President
GrantCommon Stock 4,129 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000068 · form4.xml · nonDerivative · entry 1

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,250.195

F1 · shares: Grant was initially made on October 22, 2025, subject to performance conditions concerning fiscal 2026, 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
July 10, 2026 Filed Jul 14, 2026 20:14 UTC GiftCommon Stock 5,249 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000062 · form4.xml · nonDerivative · entry 1

RAIKES JEFFREY S · CIK 0001193112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,043.936

F1 · kind: Gift to a non-profit foundation.

Read SEC document
June 23, 2026 Filed Jun 25, 2026 20:12 UTC SaleCommon Stock 885 $957.45 $847,345.46
Disclosure

SEC source: 0000909832-26-000053 · form4.xml · nonDerivative · entry 1

DENMAN KENNETH D · CIK 0001254779 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,778.936

F1 · price: The price shown is a weighted average price for shares sold in multiple transactions; the sale prices ranged from $957.44 to $957.63 per share. The reporting person will provide the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

Read SEC document
April 01, 2026 Filed Apr 1, 2026 22:13 UTC
Frates CatonExecutive Vice President
SaleCommon Stock 700 $993.00 $695,100.00
Disclosure

SEC source: 0000909832-26-000039 · form4.xml · nonDerivative · entry 1

Frates Caton · CIK 0001928633 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,815.001

Read SEC document
March 12, 2026 Filed Mar 13, 2026 20:12 UTC
George Sarah CatherineExecutive Vice President
OtherCommon Stock 642.1252 $991.21 $636,482.78
Disclosure

SEC source: 0000909832-26-000035 · form4.xml · nonDerivative · entry 1

George Sarah Catherine · CIK 0002112687 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k)

Disclosed balance after: 0

F1 · shares: Reflects a transaction by which the reporting person through an intra-plan transfer disposed of the 642.1252 shares of common stock previously reported as beneficially owned under Costco's 401(k) plan, pursuant to the company's policy prohibiting executive officers from participating in the common stock fund.

Read SEC document
March 11, 2026 Filed Mar 13, 2026 20:10 UTC
MILLERCHIP GARYExecutive Vice President
Tax withholdingCommon Stock 1,154.017 $992.23 $1,145,050.29
Disclosure

SEC source: 0000909832-26-000033 · form4.xml · nonDerivative · entry 1

MILLERCHIP GARY · CIK 0001771770 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,465.301

F1 · shares: 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 March 11, 2026.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 20:08 UTC
Adamo ClaudineExecutive Vice President
SaleCommon Stock 730 $1,003.02 $732,205.33
Disclosure

SEC source: 0000909832-26-000028 · form4.xml · nonDerivative · entry 1

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,121.195

Read SEC document
January 27, 2026 Filed Jan 28, 2026 23:43 UTC
Jones Teresa A.Executive Vice President
GiftCommon Stock 300 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000020 · form4.xml · nonDerivative · entry 1

Jones Teresa A. · CIK 0002031064 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,927.804

F1 · kind: Gift to a charitable donor advised fund.

Read SEC document
January 27, 2026 Filed Jan 28, 2026 23:46 UTC GiftCommon Stock 5,115 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000022 · form4.xml · nonDerivative · entry 1

RAIKES JEFFREY S · CIK 0001193112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,292.936

F1 · kind: Gift to a non-profit foundation.

Read SEC document
January 21, 2026 Filed Jan 23, 2026 21:53 UTC
Jones Teresa A.Executive Vice President
SaleCommon Stock 850 $986.26 $838,318.20
Disclosure

SEC source: 0000909832-26-000018 · form4.xml · nonDerivative · entry 1

Jones Teresa A. · CIK 0002031064 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,227.804

F1 · price: The price shown is a weighted average price for shares sold in multiple transactions; the sale prices ranged from $986.220 to $986.480 per share. The reporting person will provide the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

Read SEC document
January 16, 2026 Filed Jan 20, 2026 21:12 UTC GrantCommon Stock 215 $0.00 $0.00
Disclosure

SEC source: 0000909832-26-000010 · form4.xml · nonDerivative · entry 1

Raimondo Gina Marie · CIK 0002104063 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 215

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

Read SEC document
January 16, 2026 Filed Jan 20, 2026 21:15 UTC SaleCommon Stock 458 $955.00 $437,390.00
Disclosure

SEC source: 0000909832-26-000012 · form4.xml · nonDerivative · entry 1

DECKER SUSAN L · CIK 0001234655 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,531.936

Read SEC document
January 14, 2026 Filed Jan 15, 2026 21:27 UTC
Klauer James CExecutive Vice President
SaleCommon Stock 1,500 $939.00 $1,408,500.00
Disclosure

SEC source: 0000909832-26-000006 · form4.xml · nonDerivative · entry 1

Klauer James C · CIK 0001729360 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,836.994

Read SEC document
January 09, 2026 Filed Jan 12, 2026 21:36 UTC
Miller Russell DSr. Executive Vice President
SaleCommon Stock 1,500 $916.32 $1,374,480.00
Disclosure

SEC source: 0000909832-26-000004 · 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: 8,240

Read SEC document
December 30, 2025 Filed Dec 31, 2025 21:59 UTC
POLIT JAVIERExecutive Vice President
SaleCommon Stock 558.305 $862.90 $481,758.59
Disclosure

SEC source: 0000909832-25-000173 · form4.xml · nonDerivative · entry 2

POLIT JAVIER · CIK 0001852700 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,189.592

Read SEC document
December 29, 2025 Filed Dec 31, 2025 21:59 UTC
POLIT JAVIERExecutive Vice President
SaleCommon Stock 2,049 $867.21 $1,776,903.86
Disclosure

SEC source: 0000909832-25-000173 · form4.xml · nonDerivative · entry 1

POLIT JAVIER · CIK 0001852700 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,747.897

F1 · price: The price shown is a weighted average price for shares sold in multiple transactions; the sale prices ranged from $867.16 to $867.325 per share. The reporting person will provide the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

Read SEC document
December 19, 2025 Filed Dec 22, 2025 21:36 UTC GiftCommon Stock 325 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000171 · form4.xml · nonDerivative · entry 1

DENMAN KENNETH D · CIK 0001254779 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,663.936

F1 · kind: Gift to a charitable donor advised fund.

Read SEC document
December 15, 2025 Filed Dec 17, 2025 21:30 UTC GiftCommon Stock 2,827 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000167 · form4.xml · nonDerivative · entry 1

DECKER SUSAN L · CIK 0001234655 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,989.936

Read SEC document
November 10, 2025 Filed Nov 12, 2025 22:47 UTC GiftCommon Stock 4,120 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000148 · form4.xml · nonDerivative · entry 1

RAIKES JEFFREY S · CIK 0001193112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,407.936

F1 · kind: Gift to a non-profit organization.

Read SEC document
November 07, 2025 Filed Nov 12, 2025 22:45 UTC
Wilcox William RichardExecutive Vice President
SaleCommon Stock 2,400 $930.13 $2,232,312.00
Disclosure

SEC source: 0000909832-25-000146 · form4.xml · nonDerivative · entry 1

Wilcox William Richard · CIK 0002087546 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,000

F1 · balance_after: On October 23, 2025, the reporting person received a distribution of 4,400.9692 shares of common stock previously beneficially owned through Costco's 401(k) plan. Upon the distribution, a fractional share of .9692 was liquidated and the total amount owned was reduced by such amount.

Read SEC document
October 24, 2025 Filed Oct 24, 2025 23:12 UTC
Adamo ClaudineExecutive Vice President
SaleCommon Stock 2,700 $935.68 $2,526,336.00
Disclosure

SEC source: 0000909832-25-000126 · form4.xml · nonDerivative · entry 6

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,851.197

Read SEC document
October 24, 2025 Filed Oct 24, 2025 23:50 UTC
Barbre Tiffany MariePrincipal Accounting Officer
SaleCommon Stock 1,239.383 $934.62 $1,158,352.64
Disclosure

SEC source: 0000909832-25-000144 · form4.xml · nonDerivative · entry 7

Barbre Tiffany Marie · CIK 0002076006 · Principal Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,155.447

F4 · price: The price shown is a weighted average price for shares sold in multiple transactions; the sale prices ranged from $934.47 to $934.84 per share. The reporting person will provide the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:02 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000109 · form4.xml · nonDerivative · entry 1

DECKER SUSAN L · CIK 0001234655 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,816.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:09 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000111 · form4.xml · nonDerivative · entry 1

DENMAN KENNETH D · CIK 0001254779 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,988.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2025, and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:14 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000114 · form4.xml · nonDerivative · entry 1

Foulkes Helena · CIK 0001429996 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,086.802

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026 and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:16 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000116 · form4.xml · nonDerivative · entry 1

JAMES HAMILTON E · CIK 0001238989 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,537.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:17 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000118 · form4.xml · nonDerivative · entry 1

JEWELL SARAH MR SALLY · CIK 0001174963 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,612.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:21 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000120 · form4.xml · nonDerivative · entry 1

RAIKES JEFFREY S · CIK 0001193112 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,527.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:32 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000124 · form4.xml · nonDerivative · entry 1

STANTON JOHN W · CIK 0000904858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,089.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

Read SEC document
October 22, 2025 Filed Oct 24, 2025 22:24 UTC GrantCommon Stock 286 $0.00 $0.00
Disclosure

SEC source: 0000909832-25-000122 · form4.xml · nonDerivative · entry 1

Wilderotter Mary Agnes · CIK 0001180610 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,204.936

F1 · shares: Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.

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

F3 · balance_after: On July 21, 2025, the reporting person contributed 9,752 shares of Costco common stock to a grantor retained annuity trust (GRAT-1) of which the reporting person is the sole grantor, trustee and annuity beneficiary.

Read SEC document
October 22, 2025 Filed Oct 24, 2025 23:12 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 110.57 $944.68 $104,453.27
Disclosure

SEC source: 0000909832-25-000126 · form4.xml · nonDerivative · entry 5

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,551.197

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.

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October 22, 2025 Filed Oct 24, 2025 23:12 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 176.66 $944.68 $166,887.17
Disclosure

SEC source: 0000909832-25-000126 · form4.xml · nonDerivative · entry 4

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,661.767

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.

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October 22, 2025 Filed Oct 24, 2025 23:12 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 198.69 $944.68 $187,698.47
Disclosure

SEC source: 0000909832-25-000126 · form4.xml · nonDerivative · entry 3

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,838.427

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.

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October 22, 2025 Filed Oct 24, 2025 23:12 UTC
Adamo ClaudineExecutive Vice President
Tax withholdingCommon Stock 96.94 $944.68 $91,577.28
Disclosure

SEC source: 0000909832-25-000126 · form4.xml · nonDerivative · entry 2

Adamo Claudine · CIK 0001916124 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,037.117

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.

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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.