Elon Musk says he's secured $46.5 billion in financing to buy Twitter [video]

Tesla CEO Elon Musk said in a filing Thursday he has secured $46.5 billion in financing to buy Twitter — mostly with borrowed money.

The filing shows a group of banks led by Morgan Stanley is prepared to lend Musk $25.5 billion, including a separate $12.5 billion loan pledged to the value of Musk's Tesla shares.

He is currently Twitter’s largest individual shareholder, owning a 9 percent stake in the company. After Musk made an offer this month to purchase Twitter for $43 billion, the social media company adopted a “poison pill” provisiondesigned to prevent him from completing a hostile takeover of the company.

To counter the poison pill, the tech mogul also said Thursday he continues to explore a so-called tender offer to acquire all of the social media company's shares from current stockholders.