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.

Building-products distributor QXO is taking its all-cash offer to acquire Beacon Roofing Supply directly to shareholders after being rebuffed on several occasions. QXO publicly launched a tender offer to acquire Beacon early Monday, confirming an earlier report by The Wall Street Journal.