Markwayne Mullin COST Stock Trades
Markwayne Mullin's trading activity in COST
3
Total trades
$31K
Total volume
Sep 18, 2023
First trade
Dec 29, 2025
Last trade
Markwayne Mullin has disclosed 3 trades in COST between Sep 18, 2023 and Dec 29, 2025, totaling approximately $31K in transaction volume. Activity has been net-buying, with 3 purchases and 0 sales recorded.
COST has drawn broader insider attention: 5 other members of Congress have traded the stock, and 15 corporate insider transactions have been disclosed at COST in the last 12 months. See the full activity below.
All COST Trades
| TRADE DATE | DISCLOSED | DELAY | TYPE | AMOUNT | OWNER |
|---|---|---|---|---|---|
| Dec 29, 2025 | Jan 16, 2026 | 18d | Purchase | $15K | — |
| Oct 3, 2023 | Nov 1, 2023 | 29d | Purchase | $1K | — |
| Sep 18, 2023 | Oct 12, 2023 | 24d | Purchase | $15K | — |
Corporate Insider Activity in COST
10 corporate insiders at COSTCO WHOLESALE CORP /NEW have also traded COST in the last 12 months — 0 buys, 15 sells.
Top Sellers
Miller Russell D
2 sales
Rubanenko Yoram
1 sale
Adamo Claudine
2 sales
Other Members of Congress Trading COST
| POLITICIAN | PARTY | TRADES | LAST TRADE |
|---|---|---|---|
| Ro Khanna | D | 66 | Feb 24, 2026 |
| Michael T. McCaul | R | 13 | Mar 26, 2018 |
| Pete Sessions | R | 13 | Jan 31, 2024 |
| Gilbert Cisneros | D | 10 | Jan 30, 2026 |
| Donald Sternoff Beyer Jr. | D | 10 | Feb 28, 2022 |
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