The current institutional shareholding score of Otter Tail Corp is 7.00, ranking 18 out of 66 in the Electric Utilities & IPPs industry. The latest institutional shareholding proportion is 81.17%, representing a quarter-over-quarter increase of 15.55%. The largest institutional shareholder is ETHSX, holding a total of 200.80K shares, representing 0.48% of shares outstanding, with 37.14% increase in holdings.