Utilize the input text as a context reference, choose the right relationship between 'Sanofi' and 'Regeneron Pharmaceuticals' from the options.
Options: director/manager, founded by, owner of, legal form

In a separate report earlier this week, ICER said its analyses found that two new cholesterol drugs, Repatha from Amgen Inc and Praluent from partners Sanofi SA and Regeneron Pharmaceuticals Inc, should be sold at a 67 percent discount from list prices.
owner of