Former richest man Ellison is in trouble! Providing over $40 billion in personal guarantees for the Warner Brothers (WBD.US) acquisition, may shake the Oracle (ORCL.US) empire.

Larry Ellison, the founder of Oracle (ORCL.US) and former world's richest man, has accumulated the third largest fortune in the world by holding tightly to his company's stock. He rarely sells his shares, instead relying on loans to fund investments and living expenses totaling hundreds of billions of dollars. He confirmed on Monday that he will provide an irrevocable personal guarantee of over $40 billion for Paramount Sky Corporation's (PSKY.US) acquisition offer for Warner Brothers Discovery (WBD.US).