The current institutional shareholding score of Simpson Manufacturing Co Inc is 10.00, ranking 1 out of 56 in the Homebuilding & Construction Supplies industry. The latest institutional shareholding proportion is 114.50%, representing a quarter-over-quarter increase of 11.85%. The largest institutional shareholder is ETHSX, holding a total of 1.10M shares, representing 2.98% of shares outstanding, with 5731.70% increase in holdings.