Costco Wholesale Corp Congressional Trading
According to U.S. congressional financial disclosures filed under the STOCK Act, members of Congress have reported 325 trades in Costco Wholesale Corp (NASDAQ: COST) since 2012, across 70 members, worth an estimated $5.8M in disclosed volume (the midpoint of the dollar ranges members report, not exact amounts). 186 buys against 139 sells, a modestly buy-led skew, with Democratic members responsible for 46% of the trades and Republican members 54%. The most recent disclosure shown was filed August 2026, and Rohit Khanna has filed the most COST transactions among those shown, with 13. Other recent filers include Richard Dean Dr McCormick, Dan Newhouse, and Alan Armstrong. One notable disclosed move was a purchase by Markwayne Mullin on December 29, 2025, up 10.9% since. These figures are drawn from public House and Senate periodic transaction reports and reflect what members were required to disclose, not the current market value of any position. For the full record, including the month-by-month buy and sell timeline, the party breakdown, top buyers and sellers, and every individual filing, see the Costco Wholesale Corp (COST) stock overview and the complete trade table below.
Data updated
Price & congressional trade timeline
Party breakdown
Costco Wholesale congressional trading activity
| Politician | Published | Traded | Filed After | Type | Size | Return | Owner | |
|---|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | Jul 30, 2026 | 15 days | SELL |  $1,001 - $15,000 | +0.61% | Self | ||
 Rohit Khanna House | Aug 7, 2026 | Jul 20, 2026 | 18 days | SELL | $15,001 - $50,000 | +2.75% | Spouse | |
 Dan Newhouse House | Jul 17, 2026 | Jul 10, 2026 | 7 days | BUY | $1,001 - $15,000 | +4.78% | Spouse | |
Rohit Khanna House | Jul 6, 2026 | Jun 2, 2026 | 34 days | SELL | $1,001 - $15,000 | +0.60% | Child | |
 Alan Armstrong Senate | Jul 21, 2026 | Mar 27, 2026 | 116 days | BUY | $1,001 - $15,000 | -2.28% | Self | |
Rohit Khanna House | Mar 9, 2026 | Feb 24, 2026 | 13 days | BUY | $1,001 - $15,000 | -3.71% | Child | |
 Gilbert Cisneros House | Feb 13, 2026 | Jan 30, 2026 | 14 days | BUY | $1,001 - $15,000 | +2.25% | Self | |
Rohit Khanna House | Feb 6, 2026 | Jan 29, 2026 | 8 days | BUY | $15,001 - $50,000 | +1.03% | Spouse | |
Rohit Khanna House | Feb 6, 2026 | Jan 23, 2026 | 14 days | BUY | $1,001 - $15,000 | -2.09% | Child | |
Rohit Khanna House | Feb 6, 2026 | Jan 13, 2026 | 24 days | BUY | $15,001 - $50,000 | +2.21% | Spouse |
Costco Wholesale (COST) congressional trading FAQ
Can members of Congress legally trade Costco Wholesale (COST) stock?
Yes. Members of Congress are permitted to trade individual stocks, including Costco Wholesale (COST), but the STOCK Act of 2012 requires them to publicly disclose each transaction within 45 days. Quantellect tracks those disclosures; it does not imply any trade was improper.
Are congressional Costco Wholesale (COST) trades public?
Yes. Every congressional trade in Costco Wholesale (COST) on this page comes from mandatory public STOCK Act disclosure filings, which are filed with a delay and may be revised.
How many times has Congress traded Costco Wholesale (COST)?
Members of Congress have disclosed 325 trades in Costco Wholesale (COST) worth $5.8M across 70 members, according to public STOCK Act filings.
Which members of Congress have traded Costco Wholesale (COST)?
Recent and active filers of Costco Wholesale (COST) disclosures include Rohit Khanna, Gilbert Cisneros, Richard Dean Dr McCormick. The full member-by-member trade list is on this page.
Do Democrats or Republicans trade Costco Wholesale (COST) more?
Across disclosed Costco Wholesale (COST) trades, 46% were by Democrats and 53% by Republicans, led by Republicans (53%).
What is the most recent congressional Costco Wholesale (COST) trade?
The most recent disclosed Costco Wholesale (COST) trade was a sale by Richard Dean Dr McCormick, filed Aug 13, 2026.
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Not investment advice. Congressional trading data is sourced from public STOCK Act disclosures, which are filed with a delay and may contain errors or be revised. The Tide Score and other figures are generated algorithmically from public filings and market data and describe historical activity, not a recommendation. Always do your own research and consult a licensed financial advisor before making investment decisions.