Alan Armstrong bought Costco Wholesale Corp (NASDAQ: COST)
Alan Armstrong (R-OK), a U.S. Senator, has disclosed 1 trade in Costco Wholesale Corp (COST) since 2026, a single purchase, worth an estimated $8K in disclosed volume (the midpoint of the dollar ranges members report, not exact amounts).
The trade highlighted here is a purchase: Alan Armstrong bought $1,001 - $15,000 of Costco Wholesale Corp (NASDAQ: COST) on March 27, 2026. Since that trade, COST is down -2.88% against the S&P 500 up +16.97%, an outperformance of -19.85%.
Data updated
Alan Armstrong's COST trades vs the price
COST is down -2.88% since Alan Armstrong bought on March 27, 2026, versus +16.97% for the S&P 500.
Performance since this trade
All Alan Armstrong COST trades
Alan Armstrong & COST trading FAQ
Is it legal for Alan Armstrong to trade Costco Wholesale Corp (COST) stock?
Yes. Members of Congress are allowed to trade individual stocks, including Costco Wholesale Corp (COST), but the STOCK Act of 2012 requires them to publicly disclose each transaction within 45 days. Quantellect tracks those disclosures; this page does not imply the trade was improper.
When did Alan Armstrong buy COST?
Alan Armstrong disclosed a purchase of $1,001 - $15,000 of Costco Wholesale Corp (COST) on March 27, 2026, according to public STOCK Act filings.
How has COST performed since Alan Armstrong's trade?
Since Alan Armstrong bought COST on March 27, 2026, the stock is down -2.88%, versus +16.97% for the S&P 500 over the same period, an outperformance of -19.85%.
How soon must members of Congress disclose a trade?
Under the STOCK Act, members of Congress must publicly report a covered transaction within 45 days of the trade. Filings can still be delayed, amended, or contain errors.
Where can I see all congressional COST trades?
Quantellect tracks every disclosed congressional trade in Costco Wholesale Corp (COST) on the Costco Wholesale Corp congressional trading page, which aggregates filings across all members of Congress.
Alan Armstrong's COST tradesAll congressional filings for Costco Wholesale CorpAlan Armstrong's full profile
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. Estimated prices and post-trade returns are derived algorithmically from public filings and end-of-day market data and describe historical activity, not a recommendation. Always do your own research and consult a licensed financial advisor before making investment decisions.