The post Notorious Congress trader dumps entire stake in this Warren Buffett stock appeared com. 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. Receive Signals on US Senators’ Stock Trades Stocks Stay up-to-date on the trading activity of US Senators. The signal triggers based on updates from the Senate disclosure reports, notifying you of their latest stock transactions. Enable signal 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. BRK YTD stock price chart. 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.