Markwayne Mullin bought McKesson Corporation (NYSE: MCK)
Markwayne Mullin (R-OK), a U.S. Senator, has disclosed 2 trades in McKesson Corporation (MCK) since 2026, all purchases, worth an estimated $65K in disclosed volume (the midpoint of the dollar ranges members report, not exact amounts).
The trade highlighted here is a purchase: Markwayne Mullin bought $15,001 - $50,000 of McKesson Corporation (NYSE: MCK) on January 5, 2026. Since that trade, MCK is down -4.77% against the S&P 500 up +8.15%, an outperformance of -12.92%.
Across these filings, Markwayne Mullin has been a net buyer of MCK. The most recent disclosed MCK transaction shown was dated February 4, 2026. Each row in the table below links to that trade and its post-trade performance versus the market.
Data updated
Markwayne Mullin's MCK trades vs the price
MCK is down -4.77% since Markwayne Mullin bought on January 5, 2026, versus +8.15% for the S&P 500.
Performance since this trade
All Markwayne Mullin MCK trades
Markwayne Mullin & MCK trading FAQ
Is it legal for Markwayne Mullin to trade McKesson Corporation (MCK) stock?
Yes. Members of Congress are allowed to trade individual stocks, including McKesson Corporation (MCK), but the STOCK Act of 2012 requires them to publicly disclose each transaction within 45 days. BullishWhales tracks those disclosures; this page does not imply the trade was improper.
When did Markwayne Mullin buy MCK?
Markwayne Mullin disclosed a purchase of $15,001 - $50,000 of McKesson Corporation (MCK) on January 5, 2026, according to public STOCK Act filings.
How has MCK performed since Markwayne Mullin's trade?
Since Markwayne Mullin bought MCK on January 5, 2026, the stock is down -4.77%, versus +8.15% for the S&P 500 over the same period, an outperformance of -12.92%.
How many times has Markwayne Mullin traded MCK?
Markwayne Mullin has disclosed 2 MCK trades since 2026. Every disclosed trade is listed on this page.
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 MCK trades?
BullishWhales tracks every disclosed congressional trade in McKesson Corporation (MCK) on the McKesson Corporation congressional trading page, which aggregates filings across all members of Congress.
Markwayne Mullin's MCK tradesAll congressional filings for McKesson CorporationMarkwayne Mullin'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.