Late Thursday, SiriusXM CEO Mel Karmazin announced he would be selling off another 30 million shares of the satcaster, as he continues to divest his options in the company. In recent months, Karmazin has already sold off approximately 60 million shares.

Seeking Alpha notes that Karmazin has been selling off his shares once they vested, attributing the sales to tax and estate planning purposes. The site adds that by selling these 30 million shares, Karmazin is increasing the stock count for the company and diluting its value by roughly one cent. However, by increasing the share count, Liberty Media will be forced to buy another 15 million shares in order to reach 50 percent and de jure control. Seeking Alpha estimates this will cost Liberty Media another $37.5 million.

Earlier this week, Liberty added another 40 million shares of SiriusXM and now has a 48.8 percent stake in the satcaster.