Typical financial reporting.”” Several outlets, including the New York Post, say Sirius XM is ready to move on from Stern, who may also be ready to move on to do his own thing or to retire.

The timing of Stern's potential exit comes as Buffett has been actively adding Sirius XM shares to the Berkshire Hathaway Inc (NYSE:BRK)(NYSE:BRK) investment portfolio. Buffett added shares in the first quarter and reportedly added more shares in the second quarter, although the official 13F filing has yet to be released.

According to CNBC, Berkshire Hathaway owns 119,776,692 SIRI shares worth $2.5 billion. The position is the 18th largest stock holding for Buffett's conglomerate at 0.9% of assets. Berkshire Hathaway owns around 35% of Sirius XM and the position may have increased in the second quarter.“”