United States senator from Oklahoma Markwayne Mullin is back with another notable stock trade, this time fully exiting his position in Berkshire Hathaway (NYSE: BRK.B).
Filings indicate that the lawmaker’s Congress trade was reported on November 21 for the transaction made on November 3.
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The move removes Warren Buffett’s company from his portfolio at a time when Berkshire is navigating some of its most challenging conditions in years.
Notably, Berkshire’s stock has struggled throughout the year as underwriting losses, foreign-exchange hits, and a lack of major buybacks weighed on sentiment.
The company’s unusually large cash pile has also frustrated shareholders expecting deployments or acquisitions.
With Greg Abel set to assume leadership after Buffett steps back in 2026, investors have also been repricing the so-called “Buffett premium,” a trend that has amplified volatility in the stock.
Despite these structural pressures, Mullin’s timing may prove costly. Since he sold his entire Berkshire position, the shares have risen 9.52%, meaning he exited just before a notable rebound that has outpaced the broader market.
Mullin’s controversial stock trades
The trade is attracting fresh attention, given the senator’s history of controversial transactions, late filings, and repeated scrutiny over whether his investment decisions benefit from information advantages tied to public office.
Mullin has been involved in a wide array of trades over recent years, including purchases of Oklahoma municipal bonds, which drew criticism for potential conflicts given their connection to local public finance.
His latest filing reported five transactions executed on November 3. In addition to the Berkshire liquidation, Mullin also sold his full positions in Chipotle Mexican Grill, T-Mobile, and Fiserv.
Their post-trade performance has been mixed. Chipotle shares have gained 3.94%, T-Mobile has climbed 6.59%, while Fiserv has slipped 1.77%.
The day’s sole purchase was a substantial buy of Microsoft valued between $250,000 and $500,000, a position that is currently down 5.13% since the trade.
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