The current institutional shareholding score of Plug Power Inc is 5.00, ranking 10 out of 28 in the Renewable Energy industry. The latest institutional shareholding proportion is 62.55%, representing a quarter-over-quarter increase of 45.68%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 1.99% of shares outstanding, with 0.09% increase in holdings.