| 1.93 Delayed Data As of Oct 18 |  -0.10 / -4.93%Today’s Change | 1.93 Today|||52-Week Range 28.62 | -89.27% Year-to-Date |
| Individual stakeholders | 71.55% |
| Other institutional | 65.34% |
| Mutual fund holders | 15.61% |
| 7/31/2019 | TOREADOR RESEARCH & TRADING LLC Sold 9.1 Thousand shares of Mammoth Energy Services I... |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Wexford Capital LP | 48.87% | 21,992,677 | 54,541,839 | +4,204 | +0.02% |
| Henderson Global Investors Ltd. | 4.29% | 1,929,357 | 4,784,805 | +462,224 | +31.51% |
| Russell Investment Management LLC | 4.23% | 1,905,370 | 4,725,318 | +788,958 | +70.67% |
| Boston Partners Global Investors,... | 2.13% | 959,707 | 2,380,073 | +495,089 | +106.56% |
| BlackRock Fund Advisors | 1.73% | 779,746 | 1,933,770 | +15,399 | +2.01% |
| Dimensional Fund Advisors LP | 1.62% | 726,792 | 1,802,444 | +151,398 | +26.31% |
| The Vanguard Group, Inc. | 1.60% | 718,948 | 1,782,991 | -155,645 | -17.80% |
| Principal Global Investors LLC | 1.57% | 708,156 | 1,756,227 | -74,851 | -9.56% |
| Hotchkis & Wiley Capital Manageme... | 1.39% | 626,880 | 1,554,662 | +441,310 | +237.81% |
| Mellon Investments Corp. | 0.75% | 337,026 | 835,824 | +19,001 | +5.97% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Janus Henderson Small Cap Value F... | 2.98% | 1,339,407 | 3,321,729 | +731,662 | +120.39% |
| Russell US Small Cap Equity Fund | 0.60% | 270,245 | 670,208 | 0 | 0.00% |
| First Trust Small Cap Core AlphaD... | 0.59% | 266,061 | 659,831 | 0 | 0.00% |
| iShares Russell 2000 ETF | 0.58% | 259,184 | 642,776 | -6,992 | -2.63% |
| Bridgeway Omni Small Cap Value Fu... | 0.56% | 251,400 | 623,472 | +75,400 | +42.84% |
| TIAA-CREF Quant Small Cap Equity ... | 0.54% | 244,700 | 606,856 | 0 | 0.00% |
| American Beacon Small Cap Value F... | 0.44% | 198,346 | 491,898 | 0 | 0.00% |
| Vanguard Total Stock Market Index... | 0.43% | 194,314 | 481,899 | 0 | 0.00% |
| Principal Investors - Small Cap F... | 0.41% | 182,288 | 452,074 | +14,498 | +8.64% |
| Vanguard Extended Market Index Fu... | 0.40% | 180,337 | 447,236 | +9,512 | +5.57% |