COSTCOSTCO WHOLESALE CORP /NEW
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-10-27.
Insider buys (90d)
$0.00
Insider sells (90d)
$3.80M
Net flow
$-3.80M
Filings
25
Buy transactions
0
Sell transactions
3
Distinct insiders
20
Last close (cached)
$1005.16
as of 2026-10-26
1d return
+0.2%
5d return
+1.0%
1m return
+8.9%
Top insiders trading COST (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-27 | 2026-10-22 | MILLERCHIP GARY Officer | Tax | 817 | $1018.21 | $831.8K | open → |
| 2026-10-27 | 2026-10-22 | MILLERCHIP GARY Officer | Tax | 500 | $1018.21 | $509.4K | open → |
| 2026-10-27 | 2026-10-22 | MILLERCHIP GARY Officer | Tax | 313 | $1018.21 | $319.2K | open → |
| 2026-10-27 | 2026-10-22 | MILLERCHIP GARY Officer | Grant | 6,140 | $0.00 | $0.00 | open → |
| 2026-10-27 | 2026-10-22 | Vachris Roland Michael OfficerDirector | Tax | 1,131 | $1018.21 | $1.15M | open → |
| 2026-10-27 | 2026-10-22 | Vachris Roland Michael OfficerDirector | Tax | 1,121 | $1018.21 | $1.14M | open → |
| 2026-10-27 | 2026-10-22 | Vachris Roland Michael OfficerDirector | Tax | 1,404 | $1018.21 | $1.43M | open → |
| 2026-10-27 | 2026-10-22 | Vachris Roland Michael OfficerDirector | Grant | 13,973 | $0.00 | $0.00 | open → |
| 2026-10-27 | 2026-10-22 | Wilderotter Mary Agnes Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-27 | 2026-10-22 | STANTON JOHN W Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-27 | 2026-10-22 | Raimondo Gina Marie Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-27 | 2026-10-22 | RAIKES JEFFREY S Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | Klauer James C Officer | Tax | 542 | $1018.21 | $551.7K | open → |
| 2026-10-26 | 2026-10-22 | Klauer James C Officer | Tax | 443 | $1018.21 | $450.7K | open → |
| 2026-10-26 | 2026-10-22 | Klauer James C Officer | Tax | 530 | $1018.21 | $539.6K | open → |
| 2026-10-26 | 2026-10-22 | Klauer James C Officer | Tax | 396 | $1018.21 | $403.4K | open → |
| 2026-10-26 | 2026-10-22 | Klauer James C Officer | Tax | 191 | $1018.21 | $194.2K | open → |
| 2026-10-26 | 2026-10-22 | JEWELL SARAH MR SALLY Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | JAMES HAMILTON E Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | George Sarah Catherine Officer | Tax | 47 | $1018.21 | $47.6K | open → |
| 2026-10-26 | 2026-10-22 | George Sarah Catherine Officer | Tax | 35 | $1018.21 | $35.5K | open → |
| 2026-10-26 | 2026-10-22 | George Sarah Catherine Officer | Tax | 56 | $1018.21 | $56.8K | open → |
| 2026-10-26 | 2026-10-22 | George Sarah Catherine Officer | Tax | 62 | $1018.21 | $63.6K | open → |
| 2026-10-26 | 2026-10-22 | George Sarah Catherine Officer | Tax | 60 | $1018.21 | $61.1K | open → |
| 2026-10-26 | 2026-10-22 | Foulkes Helena Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | DENMAN KENNETH D Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | DECKER SUSAN L Director | Grant | 266 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | Barbre Tiffany Marie Other | Tax | 166 | $1018.21 | $169.5K | open → |
| 2026-10-26 | 2026-10-22 | Barbre Tiffany Marie Other | Tax | 85 | $1018.21 | $86.1K | open → |
| 2026-10-26 | 2026-10-22 | Barbre Tiffany Marie Other | Tax | 102 | $1018.21 | $103.4K | open → |
| 2026-10-26 | 2026-10-22 | Barbre Tiffany Marie Other | Tax | 94 | $1018.21 | $95.7K | open → |
| 2026-10-26 | 2026-10-22 | Barbre Tiffany Marie Other | Tax | 90 | $1018.21 | $91.9K | open → |
| 2026-10-26 | 2026-10-22 | Barbre Tiffany Marie Other | Grant | 1,965 | $0.00 | $0.00 | open → |
| 2026-10-26 | 2026-10-22 | Adamo Claudine Officer | Tax | 109 | $1018.21 | $110.6K | open → |
| 2026-10-26 | 2026-10-22 | Adamo Claudine Officer | Tax | 111 | $1018.21 | $113.0K | open → |
| 2026-10-26 | 2026-10-22 | Adamo Claudine Officer | Tax | 177 | $1018.21 | $180.3K | open → |
| 2026-10-26 | 2026-10-22 | Adamo Claudine Officer | Tax | 198 | $1018.21 | $201.9K | open → |
| 2026-10-26 | 2026-10-22 | Adamo Claudine Officer | Tax | 97 | $1018.21 | $98.7K | open → |
| 2026-10-14 | 2026-10-13 | Wilcox William Richard Officer | Sale | 1,100 | $958.21 | $1.05M | open → |
| 2026-09-30 | 2026-09-29 | Frates Caton Officer | Sale | 801 | $915.93 | $733.3K | open → |
| 2026-09-30 | 2026-09-29 | Adamo Claudine Officer | Sale | 2,200 | $915.93 | $2.02M | open → |
| 2026-09-14 | 2026-09-10 | Wilcox William Richard Officer | Tax | 1,935 | $902.38 | $1.75M | open → |
| 2026-09-14 | 2026-09-10 | Wilcox William Richard Officer | Grant | 4,129 | $0.00 | $0.00 | open → |
| 2026-09-14 | 2026-09-10 | Rubanenko Yoram Officer | Tax | 1,696 | $902.38 | $1.53M | open → |
| 2026-09-14 | 2026-09-10 | Rubanenko Yoram Officer | Grant | 4,129 | $0.00 | $0.00 | open → |
| 2026-09-14 | 2026-09-10 | Riel Pierre Officer | Tax | 1,562 | $902.38 | $1.41M | open → |
| 2026-09-14 | 2026-09-10 | Riel Pierre Officer | Grant | 4,552 | $0.00 | $0.00 | open → |
| 2026-09-14 | 2026-09-10 | Klauer James C Officer | Tax | 936 | $902.38 | $844.7K | open → |
| 2026-09-14 | 2026-09-10 | Klauer James C Officer | Grant | 4,129 | $0.00 | $0.00 | open → |
| 2026-09-14 | 2026-09-10 | Jones Teresa A. Officer | Tax | 1,459 | $902.38 | $1.32M | open → |
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