The current institutional shareholding score of Mammoth Energy Services Inc is 7.00, ranking 30 out of 100 in the Oil & Gas Related Equipment and Services industry. The latest institutional shareholding proportion is 75.41%, representing a quarter-over-quarter increase of 0.55%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 0.48% of shares outstanding, with 0.33% decrease in holdings.