The current institutional shareholding score of Hydrofarm Holdings Group Inc is 3.00, ranking 133 out of 183 in the Machinery, Tools, Heavy Vehicles, Trains & Ships industry. The latest institutional shareholding proportion is 16.62%, representing a quarter-over-quarter decrease of 12.26%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 1.51% of shares outstanding, with 0.30% decrease in holdings.