The current institutional shareholding score of Northwest Natural Holding Co is 10.00, ranking 1 out of 14 in the Natural Gas Utilities industry. The latest institutional shareholding proportion is 92.17%, representing a quarter-over-quarter increase of 10.90%. The largest institutional shareholder is ETHSX, holding a total of 280.63K shares, representing 0.64% of shares outstanding, with 8.47% increase in holdings.