In a deal that could bring Arvinas Inc. a potential $2.4 billion, the company will collaborate with Pfizer Inc. to develop and commercialize an oral estrogen receptor protein degrader. In addition to a potential $400 million in approval milestones and a possible $1 billion in commercial milestones, Arvinas will be paid $650 million up front by Pfizer, which will also make an equity investment of $350 million in Arvinas while receiving about 3.5 million newly issued Arvinas common stock shares. With the deal, Pfizer will have a 7% equity share in Arvinas. The two plan to equally divide development and commercialization costs as well as any profits.