COST Congressional Stock Trades
COSTCO WHOLESALE CORPORATION CMN
Last disclosed trade Aug 24
Every disclosed trade in COST by members of Congress under the STOCK Act, parsed by Coldpine. Informational only, sourced from public filings. Not investment advice.
Sample · the intelligence layer
Marjorie Taylor Greene · Bought $COST · Nov 25 · $1K–$15K
1 other member traded this name in the same window.
Every disclosed trade in the database gets this treatment: a four-factor score and a written read from Coldpine’s AI-based analysis. Informational only, not investment advice. Create a free account for every scored trade →
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The record on $COST
Coldpine has parsed 54 disclosed trades in $COST by 13 members of Congress, drawn from 42 periodic transaction reports dated Mar 31, 2021 through Aug 24, 2026. That is 52 trades from House members and 2 trades from senators, filed 32 by Democrats and 22 by Republicans.
Of the 54 trades with a known filing lag, 7 were reported more than 45 days after the trade date, outside the window the STOCK Act sets. The median lag was 24 days. The longest was 917 days: a $COST purchase by Richard Dean McCormick dated Mar 15, 2023, disclosed Sep 17, 2025. How late filing is measured across all of Congress is in the late-filers study.
38 of the 45 trades that list an account holder (84%) were reported under a spouse, dependent child, or joint account rather than the member directly.
Rohit Khanna filed the most $COST purchases (16), and Rohit Khanna the most sales (10).
Activity peaked in 2025 with 22 trades. The busiest single month was March 2025, when 3 different members disclosed $COST trades. In 1 calendar month out of 27 with activity, three or more members bought $COST in the same month, the same-direction overlap Coldpine's cluster detector looks for.
Across the 32 purchases Coldpine can price, $COST moved +6.13% on average between the trade date and the disclosure date, against +4.61% for the S&P 500 over the same windows. The stock was higher at disclosure than at the trade in 66% of those purchases. That is a record of what already happened, not a forecast. Method: what stocks do before Congress discloses.
Members who trade COST
Recent disclosed trades in COST
| Date | Member | Type | Amount |
|---|---|---|---|
| Aug 24 | Rohit Khanna(CA) | buy | $1K–$15K |
| Jul 30 | Richard Dean McCormick(GA) | sell | $1K–$15K |
| Jul 20 | Rohit Khanna(CA) | sell | $15K–$50K |
| Jun 2 | Rohit Khanna(CA) | sell | $1K–$15K |
| Mar 27 | Alan Armstrong(OK) | buy | $1K–$15K |
| Dec 29 | Markwayne Mullin(OK) | buy | $15K–$50K |
| Dec 12 | Rohit Khanna(CA) | sell | $15K–$50K |
| Dec 5 | Rohit Khanna(CA) | sell | $1K–$15K |
| Nov 10 | Rohit Khanna(CA) | buy | $15K–$50K |
| Nov 5 | Richard Dean McCormick(GA) | buy | $1K–$15K |
| Nov 3 | Rohit Khanna(CA) | buy | $1K–$15K |
| Oct 7 | Rohit Khanna(CA) | sell | $15K–$50K |
| Sep 29 | Rohit Khanna(CA) | sell | $1K–$15K |
| Mar 27 | Greg Landsman(OH) | sell | $15K–$50K |
| Mar 27 | Greg Landsman(OH) | sell | $1K–$15K |
| Mar 27 | Greg Landsman(OH) | sell | $1K–$15K |
| Mar 17 | Marjorie Taylor Greene(GA) | buy | $1K–$15K |
| Mar 13 | Rohit Khanna(CA) | buy | $1K–$15K |
| Feb 26 | Greg Landsman(OH) | sell | $1K–$15K |
| Feb 25 | Rohit Khanna(CA) | sell | $1K–$15K |
Showing 20 of 54 disclosed trades.
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