Drug companies Pfizer and Allergan are expected to close on a merger deal, which would create the world's largest drugmaker by sales. The expected value of the merger is about $150 billion.
Executives from both companies are expected to vote on the merger Sunday. According to The New York Times, under the deal, "Pfizer would pay 11.3 of its shares for each share of Allergan." (Video via Pfizer)
Allergan, which is headquartered in Dublin and known for producing Botox, will likely be the legal buyer in this case so it can help New York-based Pfizer lower its American tax rate.
Pfizer's top dog, Ian Read, will keep his reign over the new combined company. The Wall Street Journal reports Allergan's CEO will serve right under him.
2015 has seen a number of massive mergers and acquisitions. Anheuser-Busch InBev bought SAB Miller for $108 billion earlier this month.
The merger between Kraft Foods and Heinz is valued at more than $60 billion, and AT&T and DirecTV merged in July after settling on a deal worth almost $49 billion.
But if this deal between Pfizer and Allergan is approved, it will be the largest merger of the year and one of the largest mergers in history.
This video includes images from Getty Images.