Twitter’s board of directors has prepared for a hostile takeover a day after billionaire Elon Musk made a $43 billion offer to buy the company. The social media network has established a “limited-duration shareholder rights plan,” also called a “poison pill.” This makes owning more than a 15 percent interest in the company illegal. It is achieved by allowing clients to purchase additional shares at a lower cost. The board of directors of Twitter presented their defense strategy to the US Securities and Exchange Commission (SEC). A hostile takeover happens when one company tries to buy another against the wishes of that organization’s management – in Twitter’s case, the executive board. Musk announced earlier this month that he owns 9.2 percent of Twitter, although he is no longer the company’s largest shareholder. He states that his major motivation is to expand free speech on Twitter, which is a constitutional right in the United States.