Costco Wholesale Corp (COST)

Costco Wholesale Corp experienced net selling activity totaling approximately $847,345 over the past ninety days. Recent transactions involved directors and former officers offloading shares amid a 10.6% stock price decline. These divestments occurred following the latest earnings report, which showed a slight miss in expectations, reflecting current market sentiment regarding the retail giant's valuation.
Ticker: COST Exchange: NSM


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Insider trades have triggered activity signals for Costco Wholesale Corp. Upgrade to see score, net flow, insiders and the full signal context.

Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
3.3
DENMAN KENNETH D Non-Executive Director
Transaction date
Sale
Price
129.59
Quantity 96,829 +14.4%
Value US$805,660
3.3
DENMAN KENNETH D Director Non-Executive Director
Transaction date
Proposed sale
Price
150.62
Quantity 71,678
Value US$410,178
2.8
Callans Patrick J Former Officer Officer
Transaction date
Proposed sale
Price
268.86
Quantity 97,491
Value US$4,280,507
2.8
Callans Patrick J Former Officer Officer
Transaction date
Proposed sale
Price
995.37
Quantity 1,000
Value US$995,373
2.5
Frates Caton Executive Vice President Officer
Transaction date
Sale
Price
993.00
Quantity 700 -10.7%
Value US$695,100
2.5
Caton Frates Officer Officer
Transaction date
Proposed sale
Price
985.37
Quantity 700
Value US$689,758
2.6
Adamo Claudine Executive Vice President Officer
Transaction date
Sale
Price
1,003.02
Quantity 730 -10.7%
Value US$732,205
2.6
Adamo Claudine Officer Officer
Transaction date
Proposed sale
Price
1,003.02
Quantity 730
Value US$732,205
2.5
Jones Teresa A. Executive Vice President Officer
Transaction date
Sale
Price
986.26
Quantity 850 -16.7%
Value US$838,318
2.5
Jones Teresa A. Officer Officer
Transaction date
Proposed sale
Price
986.26
Quantity 850
Value US$838,318
2.6
DECKER SUSAN L Non-Executive Director
Transaction date
Sale
Price
955.00
Quantity 458 -5.1%
Value US$437,390
2.6
SUSAN L DECKER TRUST Director Non-Executive Director
Transaction date
Proposed sale
Price
955.00
Quantity 458
Value US$437,390
2.5
Klauer James C Executive Vice President Officer
Transaction date
Sale
Price
939.00
Quantity 1,500 -3.2%
Value US$1,408,500
2.5
Klauer James C Officer Officer
Transaction date
Proposed sale
Price
939.00
Quantity 1,500
Value US$1,408,500
2.6
Miller Russell D Sr. Executive Vice President Officer
Transaction date
Sale
Price
916.32
Quantity 1,500 -15.4%
Value US$1,374,480
2.6
THE MILLER FAMILY TRUST Officer Officer
Transaction date
Proposed sale
Price
916.32
Quantity 1,500
Value US$1,374,480
1.7
POLIT JAVIER Executive Vice President Officer
Transaction date
Sale
Price
862.90
Quantity 558 -5.2%
Value US$481,759
1.7
POLIT JAVIER Officer Officer
Transaction date
Proposed sale
Price
861.82
Quantity 559
Value US$481,759
1.7
POLIT JAVIER Executive Vice President Officer
Transaction date
Sale
Price
867.21
Quantity 2,049 -16.0%
Value US$1,776,904
1.7
POLIT JAVIER Officer Officer
Transaction date
Proposed sale
Price
867.21
Quantity 2,049
Value US$1,776,904
1.6
Wilcox William Richard Executive Vice President Officer
Transaction date
Sale
Price
930.13
Quantity 2,400 -54.5%
Value US$2,232,312
1.6
Wilcox William Richard Officer Officer
Transaction date
Proposed sale
Price
930.13
Quantity 2,400
Value US$2,232,313
1.6
Barbre Tiffany Marie Officer Officer
Transaction date
Proposed sale
Price
934.16
Quantity 1,240
Value US$1,158,353
2.6
Adamo Claudine Officer Officer
Transaction date
Proposed sale
Price
935.68
Quantity 2,700
Value US$2,526,336
1.6
Barbre Tiffany Marie Principal Accounting Officer
Transaction date
Sale
Price
934.62
Quantity 1,239 -19.4%
Value US$1,158,353
2.6
Adamo Claudine Executive Vice President Officer
Transaction date
Sale
Price
935.68
Quantity 2,700 -28.3%
Value US$2,526,336
2.6
Miller Russell D Sr. Executive Vice President Officer
Transaction date
Sale
Price
915.00
Quantity 3,381 -25.8%
Value US$3,093,615
2.5
Frates Caton Executive Vice President Officer
Transaction date
Sale
Price
910.02
Quantity 1,540 -14.2%
Value US$1,401,431
2.5
Frates Caton Officer Officer
Transaction date
Proposed sale
Price
910.02
Quantity 1,540
Value US$1,401,431
Transaction date
Proposed sale
Price
915.00
Quantity 3,381
Value US$3,093,615
2.5
Jones Teresa A. Executive Vice President Officer
Transaction date
Sale
Price
992.05
Quantity 600 -20.3%
Value US$595,230
2.5
Jones Teresa A. Officer Officer
Transaction date
Proposed sale
Price
992.05
Quantity 600
Value US$595,230
2.6
Rubanenko Yoram Executive Vice President Officer
Transaction date
Sale
Price
974.96
Quantity 4,000 -40.9%
Value US$3,899,852
2.6
Rubanenko Yoram Officer Officer
Transaction date
Proposed sale
Price
974.96
Quantity 4,000
Value US$3,899,850
2.6
DECKER SUSAN L Non-Executive Director
Transaction date
Sale
Price
978.40
Quantity 1 -0.0%
Value US$978
2.6
DECKER SUSAN L Non-Executive Director
Transaction date
Sale
Price
980.00
Quantity 546 -4.5%
Value US$535,080
2.6
SUSAN L DECKER Director Non-Executive Director
Transaction date
Proposed sale
Price
978.40
Quantity 1
Value US$978
2.6
SUSAN L DECKER Director Non-Executive Director
Transaction date
Proposed sale
Price
980.00
Quantity 546
Value US$535,080
2.8
Callans Patrick J Executive Vice President Officer
Transaction date
Sale
Price
1,002.77
Quantity 3,000 -4.9%
Value US$3,008,298
2.8
Callans Patrick J Officer Officer
Transaction date
Proposed sale
Price
1,002.77
Quantity 3,000
Value US$3,008,296
2.1
Riel Pierre Executive Vice President Officer
Transaction date
Sale
Price
1,014.15
Quantity 2,000 -19.6%
Value US$2,028,294
2.1
Riel Pierre Officer Officer
Transaction date
Proposed sale
Price
1,014.15
Quantity 2,000
Value US$2,028,294
2.5
Klauer James C Executive Vice President Officer
Transaction date
Sale
Price
981.07
Quantity 4,000 -8.3%
Value US$3,924,280
2.5
Klauer James C Officer Officer
Transaction date
Proposed sale
Price
981.07
Quantity 4,000
Value US$3,924,280
2.9
MILLERCHIP GARY Officer Officer
Transaction date
Proposed sale
Price
940.01
Quantity 1,100
Value US$1,034,007
2.9
MILLERCHIP GARY Executive Vice President Officer
Transaction date
Sale
Price
940.01
Quantity 1,100 -9.0%
Value US$1,034,007
2.6
Adamo Claudine Executive Vice President Officer
Transaction date
Sale
Price
922.56
Quantity 900 -11.4%
Value US$830,304
2.6
Adamo Claudine Officer Officer
Transaction date
Proposed sale
Price
922.56
Quantity 900
Value US$830,304
2.5
Frates Caton Executive Vice President Officer
Transaction date
Sale
Price
900.25
Quantity 850 -9.7%
Value US$765,213
2.5
Frates Caton Officer; Director Executive Director
Transaction date
Proposed sale
Price
900.25
Quantity 850
Value US$765,213
2.1
Vachris Roland Michael President and CEO Executive Director
Transaction date
Sale
Price
931.00
Quantity 3,600 -8.1%
Value US$3,351,600
2.1
Vachris Roland Michael Officer; Director Executive Director
Transaction date
Proposed sale
Price
931.00
Quantity 3,600
Value US$3,351,600
2.4
GALANTI RICHARD A Officer; Director Executive Director
Transaction date
Proposed sale
Price
894.34
Quantity 1,417
Value US$1,267,280
2.4
GALANTI RICHARD A Executive Vice President Executive Director
Transaction date
Sale
Price
894.68
Quantity 1,416 -4.9%
Value US$1,267,280
2.5
Jones Teresa A. Executive Vice President Officer
Transaction date
Sale
Price
896.55
Quantity 800 -21.3%
Value US$717,236
2.5
Jones Teresa A. Officer Officer
Transaction date
Proposed sale
Price
896.55
Quantity 800
Value US$717,236
2.1
Riel Pierre Officer Officer
Transaction date
Proposed sale
Price
896.71
Quantity 2,000
Value US$1,793,426
2.1
Riel Pierre Executive Vice President Officer
Transaction date
Sale
Price
896.71
Quantity 2,000 -16.4%
Value US$1,793,426
2.6
Miller Russell D Sr. Executive Vice President Officer
Transaction date
Sale
Price
891.15
Quantity 4,400 -30.1%
Value US$3,921,069
2.6
THE MILLER FAMILY TRUST Officer Officer
Transaction date
Proposed sale
Price
891.15
Quantity 4,400
Value US$3,921,069
2.6
Adamo Claudine Executive Vice President Officer
Transaction date
Sale
Price
888.99
Quantity 3,200 -27.1%
Value US$2,844,778
2.5
Frates Caton Executive Vice President Officer
Transaction date
Sale
Price
883.35
Quantity 1,700 -14.9%
Value US$1,501,695
2.8
Callans Patrick J Executive Vice President Officer
Transaction date
Sale
Price
893.94
Quantity 2,500 -3.6%
Value US$2,234,850
2.6
DECKER SUSAN L Director Non-Executive Director
Transaction date
Proposed sale
Price
876.50
Quantity 620
Value US$543,430
2.4
GALANTI RICHARD A Officer; Director Executive Director
Transaction date
Proposed sale
Price
874.05
Quantity 500
Value US$437,025
2.4
GALANTI RICHARD A Executive Vice President Executive Director
Transaction date
Sale
Price
874.05
Quantity 500 -2.1%
Value US$437,025
2.6
DECKER SUSAN L Non-Executive Director
Transaction date
Sale
Price
876.50
Quantity 620 -5.0%
Value US$543,430
2.4
GALANTI RICHARD A Executive Vice President Executive Director
Transaction date
Sale
Price
863.88
Quantity 500 -2.1%
Value US$431,938
2.4
GALANTI RICHARD A Officer; Director Executive Director
Transaction date
Proposed sale
Price
863.88
Quantity 500
Value US$431,938
2.5
Jones Teresa A. Executive Vice President Officer
Transaction date
Sale
Price
832.55
Quantity 4 -0.1%
Value US$3,330
3.3
DENMAN KENNETH D Director Non-Executive Director
Transaction date
Proposed sale
Price
851.53
Quantity 350
Value US$298,036
3.3
DENMAN KENNETH D Non-Executive Director
Transaction date
Sale
Price
851.53
Quantity 350 -5.6%
Value US$298,036
2.7
Hines Daniel M. Principal Acctg Officer
Transaction date
Sale
Price
848.53
Quantity 1,500 -12.0%
Value US$1,272,796
2.7
Hines Daniel M. Principal Acctg Officer
Transaction date
Sale
Price
844.20
Quantity 1,500 -10.7%
Value US$1,266,300
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-06-25 2026-06-23 S Sale Non-Executive Director
96,829 +14.4%
129.59
US$805,660
96,829 +14.4% 129.59 US$805,660
2026-06-23 2026-06-23 PrS Proposed sale

Director

Non-Executive Director
71,678
150.62
US$410,178
71,678 150.62 US$410,178
2026-06-12 2026-06-12 PrS Proposed sale

Former Officer

Officer
97,491
268.86
US$4,280,507
97,491 268.86 US$4,280,507
2026-06-05 2026-06-05 PrS Proposed sale

Former Officer

Officer
1,000
995.37
US$995,373
1,000 995.37 US$995,373
2026-04-01 2026-04-01 S Sale

Executive Vice President

Officer
700 -10.7%
993.00
US$695,100
700 -10.7% 993.00 US$695,100
2026-04-01 2026-04-01 PrS Proposed sale

Officer

Officer
700
985.37
US$689,758
700 985.37 US$689,758
2026-03-11 2026-03-09 S Sale

Executive Vice President

Officer
730 -10.7%
1,003.02
US$732,205
730 -10.7% 1,003.02 US$732,205
2026-03-09 2026-03-09 PrS Proposed sale

Officer

Officer
730
1,003.02
US$732,205
730 1,003.02 US$732,205
2026-01-23 2026-01-21 S Sale

Executive Vice President

Officer
850 -16.7%
986.26
US$838,318
850 -16.7% 986.26 US$838,318
2026-01-21 2026-01-21 PrS Proposed sale

Officer

Officer
850
986.26
US$838,318
850 986.26 US$838,318
2026-01-20 2026-01-16 S Sale Non-Executive Director
458 -5.1%
955.00
US$437,390
458 -5.1% 955.00 US$437,390
2026-01-16 2026-01-16 PrS Proposed sale

Director

Non-Executive Director
458
955.00
US$437,390
458 955.00 US$437,390
2026-01-15 2026-01-14 S Sale

Executive Vice President

Officer
1,500 -3.2%
939.00
US$1,408,500
1,500 -3.2% 939.00 US$1,408,500
2026-01-14 2026-01-14 PrS Proposed sale

Officer

Officer
1,500
939.00
US$1,408,500
1,500 939.00 US$1,408,500
2026-01-12 2026-01-09 S Sale

Sr. Executive Vice President

Officer
1,500 -15.4%
916.32
US$1,374,480
1,500 -15.4% 916.32 US$1,374,480
2026-01-09 2026-01-09 PrS Proposed sale

Officer

Officer
1,500
916.32
US$1,374,480
1,500 916.32 US$1,374,480
2025-12-31 2025-12-30 S Sale

Executive Vice President

Officer
558 -5.2%
862.90
US$481,759
558 -5.2% 862.90 US$481,759
2025-12-30 2025-12-30 PrS Proposed sale

Officer

Officer
559
861.82
US$481,759
559 861.82 US$481,759
2025-12-31 2025-12-29 S Sale

Executive Vice President

Officer
2,049 -16.0%
867.21
US$1,776,904
2,049 -16.0% 867.21 US$1,776,904
2025-12-29 2025-12-29 PrS Proposed sale

Officer

Officer
2,049
867.21
US$1,776,904
2,049 867.21 US$1,776,904
2025-11-12 2025-11-07 S Sale

Executive Vice President

Officer
2,400 -54.5%
930.13
US$2,232,312
2,400 -54.5% 930.13 US$2,232,312
2025-11-07 2025-11-07 PrS Proposed sale

Officer

Officer
2,400
930.13
US$2,232,313
2,400 930.13 US$2,232,313
2025-10-24 2025-10-24 PrS Proposed sale

Officer

Officer
1,240
934.16
US$1,158,353
1,240 934.16 US$1,158,353
2025-10-24 2025-10-24 PrS Proposed sale

Officer

Officer
2,700
935.68
US$2,526,336
2,700 935.68 US$2,526,336
2025-10-24 2025-10-24 S Sale

Principal Accounting Officer

1,239 -19.4%
934.62
US$1,158,353
1,239 -19.4% 934.62 US$1,158,353
2025-10-24 2025-10-24 S Sale

Executive Vice President

Officer
2,700 -28.3%
935.68
US$2,526,336
2,700 -28.3% 935.68 US$2,526,336
2025-10-01 2025-09-29 S Sale

Sr. Executive Vice President

Officer
3,381 -25.8%
915.00
US$3,093,615
3,381 -25.8% 915.00 US$3,093,615
2025-09-30 2025-09-29 S Sale

Executive Vice President

Officer
1,540 -14.2%
910.02
US$1,401,431
1,540 -14.2% 910.02 US$1,401,431
2025-09-29 2025-09-29 PrS Proposed sale

Officer

Officer
1,540
910.02
US$1,401,431
1,540 910.02 US$1,401,431
2025-09-29 2025-09-29 PrS Proposed sale

Affiliate

3,381
915.00
US$3,093,615
3,381 915.00 US$3,093,615
2025-08-22 2025-08-20 S Sale

Executive Vice President

Officer
600 -20.3%
992.05
US$595,230
600 -20.3% 992.05 US$595,230
2025-08-20 2025-08-20 PrS Proposed sale

Officer

Officer
600
992.05
US$595,230
600 992.05 US$595,230
2025-07-15 2025-07-14 S Sale

Executive Vice President

Officer
4,000 -40.9%
974.96
US$3,899,852
4,000 -40.9% 974.96 US$3,899,852
2025-07-14 2025-07-14 PrS Proposed sale

Officer

Officer
4,000
974.96
US$3,899,850
4,000 974.96 US$3,899,850
2025-06-20 2025-06-18 S Sale Non-Executive Director
1 -0.0%
978.40
US$978
1 -0.0% 978.40 US$978
2025-06-20 2025-06-18 S Sale Non-Executive Director
546 -4.5%
980.00
US$535,080
546 -4.5% 980.00 US$535,080
2025-06-18 2025-06-18 PrS Proposed sale

Director

Non-Executive Director
1
978.40
US$978
1 978.40 US$978
2025-06-18 2025-06-18 PrS Proposed sale

Director

Non-Executive Director
546
980.00
US$535,080
546 980.00 US$535,080
2025-06-10 2025-06-09 S Sale

Executive Vice President

Officer
3,000 -4.9%
1,002.77
US$3,008,298
3,000 -4.9% 1,002.77 US$3,008,298
2025-06-09 2025-06-09 PrS Proposed sale

Officer

Officer
3,000
1,002.77
US$3,008,296
3,000 1,002.77 US$3,008,296
2025-06-09 2025-06-06 S Sale

Executive Vice President

Officer
2,000 -19.6%
1,014.15
US$2,028,294
2,000 -19.6% 1,014.15 US$2,028,294
2025-06-06 2025-06-06 PrS Proposed sale

Officer

Officer
2,000
1,014.15
US$2,028,294
2,000 1,014.15 US$2,028,294
2025-04-21 2025-04-17 S Sale

Executive Vice President

Officer
4,000 -8.3%
981.07
US$3,924,280
4,000 -8.3% 981.07 US$3,924,280
2025-04-17 2025-04-17 PrS Proposed sale

Officer

Officer
4,000
981.07
US$3,924,280
4,000 981.07 US$3,924,280
2025-03-27 2025-03-27 PrS Proposed sale

Officer

Officer
1,100
940.01
US$1,034,007
1,100 940.01 US$1,034,007
2025-03-27 2025-03-27 S Sale

Executive Vice President

Officer
1,100 -9.0%
940.01
US$1,034,007
1,100 -9.0% 940.01 US$1,034,007
2025-03-25 2025-03-24 S Sale

Executive Vice President

Officer
900 -11.4%
922.56
US$830,304
900 -11.4% 922.56 US$830,304
2025-03-24 2025-03-24 PrS Proposed sale

Officer

Officer
900
922.56
US$830,304
900 922.56 US$830,304
2025-03-20 2025-03-18 S Sale

Executive Vice President

Officer
850 -9.7%
900.25
US$765,213
850 -9.7% 900.25 US$765,213
2025-03-18 2025-03-18 PrS Proposed sale

Officer; Director

Executive Director
850
900.25
US$765,213
850 900.25 US$765,213
2025-03-13 2025-03-11 S Sale

President and CEO

Executive Director
3,600 -8.1%
931.00
US$3,351,600
3,600 -8.1% 931.00 US$3,351,600
2025-03-11 2025-03-11 PrS Proposed sale

Officer; Director

Executive Director
3,600
931.00
US$3,351,600
3,600 931.00 US$3,351,600
2024-10-24 2024-10-24 PrS Proposed sale

Officer; Director

Executive Director
1,417
894.34
US$1,267,280
1,417 894.34 US$1,267,280
2024-10-24 2024-10-24 S Sale

Executive Vice President

Executive Director
1,416 -4.9%
894.68
US$1,267,280
1,416 -4.9% 894.68 US$1,267,280
2024-10-24 2024-10-23 S Sale

Executive Vice President

Officer
800 -21.3%
896.55
US$717,236
800 -21.3% 896.55 US$717,236
2024-10-23 2024-10-23 PrS Proposed sale

Officer

Officer
800
896.55
US$717,236
800 896.55 US$717,236
2024-10-15 2024-10-15 PrS Proposed sale

Officer

Officer
2,000
896.71
US$1,793,426
2,000 896.71 US$1,793,426
2024-10-15 2024-10-15 S Sale

Executive Vice President

Officer
2,000 -16.4%
896.71
US$1,793,426
2,000 -16.4% 896.71 US$1,793,426
2024-10-15 2024-10-11 S Sale

Sr. Executive Vice President

Officer
4,400 -30.1%
891.15
US$3,921,069
4,400 -30.1% 891.15 US$3,921,069
2024-10-11 2024-10-11 PrS Proposed sale

Officer

Officer
4,400
891.15
US$3,921,069
4,400 891.15 US$3,921,069
2024-10-02 2024-09-30 S Sale

Executive Vice President

Officer
3,200 -27.1%
888.99
US$2,844,778
3,200 -27.1% 888.99 US$2,844,778
2024-10-02 2024-09-30 S Sale

Executive Vice President

Officer
1,700 -14.9%
883.35
US$1,501,695
1,700 -14.9% 883.35 US$1,501,695
2024-10-02 2024-09-30 S Sale

Executive Vice President

Officer
2,500 -3.6%
893.94
US$2,234,850
2,500 -3.6% 893.94 US$2,234,850
2024-08-15 2024-08-15 PrS Proposed sale

Director

Non-Executive Director
620
876.50
US$543,430
620 876.50 US$543,430
2024-08-15 2024-08-15 PrS Proposed sale

Officer; Director

Executive Director
500
874.05
US$437,025
500 874.05 US$437,025
2024-08-15 2024-08-15 S Sale

Executive Vice President

Executive Director
500 -2.1%
874.05
US$437,025
500 -2.1% 874.05 US$437,025
2024-08-15 2024-08-15 S Sale Non-Executive Director
620 -5.0%
876.50
US$543,430
620 -5.0% 876.50 US$543,430
2024-08-15 2024-08-13 S Sale

Executive Vice President

Executive Director
500 -2.1%
863.88
US$431,938
500 -2.1% 863.88 US$431,938
2024-08-13 2024-08-13 PrS Proposed sale

Officer; Director

Executive Director
500
863.88
US$431,938
500 863.88 US$431,938
2024-08-29 2024-07-25 S Sale

Executive Vice President

Officer
4 -0.1%
832.55
US$3,330
4 -0.1% 832.55 US$3,330
2024-07-15 2024-07-15 PrS Proposed sale

Director

Non-Executive Director
350
851.53
US$298,036
350 851.53 US$298,036
2024-07-15 2024-07-15 PrS Proposed sale

Officer

Officer
1,500
848.53
US$1,272,796
1,500 848.53 US$1,272,796
2024-07-15 2024-07-15 S Sale Non-Executive Director
350 -5.6%
851.53
US$298,036
350 -5.6% 851.53 US$298,036
2024-07-15 2024-07-15 S Sale

Principal Acctg Officer

1,500 -12.0%
848.53
US$1,272,796
1,500 -12.0% 848.53 US$1,272,796
2024-07-15 2024-07-12 S Sale

Principal Acctg Officer

1,500 -10.7%
844.20
US$1,266,300
1,500 -10.7% 844.20 US$1,266,300