Markwayne Mullin bought Berkshire Hathaway Cl B (BRK.B)
Markwayne Mullin (R-OK), a U.S. Senator, has disclosed 3 trades in Berkshire Hathaway Cl B (BRK.B) since 2023, 2 purchases and 1 sale, worth an estimated $73K 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 Berkshire Hathaway Cl B (BRK.B) on September 13, 2023. Since that trade, BRK.B is up +31.92% against the S&P 500 up +69.14%, an outperformance of -37.22%.
Across these filings, Markwayne Mullin has been a net buyer of BRK.B (a buy-to-sell ratio of 2.00). The most recent disclosed BRK.B transaction shown was dated November 3, 2025. Each row in the table below links to that trade and its post-trade performance versus the market.
Data updated
Markwayne Mullin's BRK.B trades vs the price
BRK.B is up +31.92% since Markwayne Mullin bought on September 13, 2023, versus +69.14% for the S&P 500.
Performance since this trade
All Markwayne Mullin BRK.B trades
Markwayne Mullin & BRK.B trading FAQ
Is it legal for Markwayne Mullin to trade Berkshire Hathaway Cl B (BRK.B) stock?
Yes. Members of Congress are allowed to trade individual stocks, including Berkshire Hathaway Cl B (BRK.B), 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 Markwayne Mullin buy BRK.B?
Markwayne Mullin disclosed a purchase of $15,001 - $50,000 of Berkshire Hathaway Cl B (BRK.B) on September 13, 2023, according to public STOCK Act filings.
How has BRK.B performed since Markwayne Mullin's trade?
Since Markwayne Mullin bought BRK.B on September 13, 2023, the stock is up +31.92%, versus +69.14% for the S&P 500 over the same period, an outperformance of -37.22%.
How many times has Markwayne Mullin traded BRK.B?
Markwayne Mullin has disclosed 3 BRK.B trades since 2023 (2 purchases and 1 sale). 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 BRK.B trades?
Quantellect tracks every disclosed congressional trade in Berkshire Hathaway Cl B (BRK.B) on the Berkshire Hathaway Cl B congressional trading page, which aggregates filings across all members of Congress.
Markwayne Mullin's BRK.B tradesAll congressional filings for Berkshire Hathaway Cl BMarkwayne 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.