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 t ...