The current institutional shareholding score of Regeneron Pharmaceuticals Inc is 10.00, ranking 1 out of 157 in the Pharmaceuticals industry. The latest institutional shareholding proportion is 91.89%, representing a quarter-over-quarter increase of 1.78%. The largest institutional shareholder is ETHSX, holding a total of 693.03K shares, representing 0.55% of shares outstanding, with 3719.44% increase in holdings.