Beacon Roofing Supply on Tuesday adopted a poison pill defense to prevent a $11 billion hostile takeover by billionaire entrepreneur Brad Jacobs through his company QXO. The defense strategy creates a roadblock for Jacobs' attempt to become a big player in building products distribution through QXO,

QXO Inc. has launched a hostile takeover bid for Beacon Roofing Supply Inc. after the board of the building products company rejected its offer as too low.

QXO (NYSE:QXO) has commenced an $11B all-cash tender offer to acquire all outstanding shares of Beacon Roofing Supply (NASDAQ:BECN) for $124.25 a share. This price implies a 37% premium above Beacon’s 90-day unaffected volume-weighted average price of $91.