Shares of Oyster Point Pharma Inc. (NASDAQ:OYST) soared to $11.57, or 38.6% on word of the buyout by Viatris Inc., which is also taking over privately held, development-stage Famy Life Sciences Ltd. to create an ophthalmology franchise that Viatris estimates could mean at least $1 billion in sales by 2028 as well as at least $500 million more in adjusted EBITDA.