| BlackRock Institutional Trust Company, N.A. |
5,248,441 |
11.76 |
56,567 |
3/31/21 |
| The Vanguard Group, Inc. |
2,925,412 |
6.56 |
146,929 |
3/31/21 |
| Franklin Mutual Advisers, LLC |
2,537,641 |
5.69 |
721,385 |
3/31/21 |
| Dimensional Fund Advisors, L.P. |
2,307,562 |
5.17 |
-193,771 |
3/31/21 |
| BNP Paribas Asset Management UK Limited |
2,297,596 |
5.15 |
-231,912 |
3/31/21 |
| Encompass Capital Advisors, LLC |
1,868,637 |
4.21 |
-102,363 |
12/31/20 |
| State Street Global Advisors (US) |
1,570,896 |
3.54 |
18,928 |
12/31/20 |
| Rubric Capital Management LP |
1,331,330 |
2.98 |
275,000 |
3/31/21 |
| D. E. Shaw & Co., L.P. |
1,294,322 |
2.91 |
-175,998 |
12/31/20 |
| Victory Capital Management Inc. |
1,257,380 |
2.82 |
1,235,926 |
3/31/21 |
| Private Management Group, Inc. |
1,212,473 |
2.72 |
-246,478 |
3/31/21 |
| BlackRock Financial Management, Inc. |
1,114,668 |
2.50 |
904,308 |
3/31/21 |
| Mangrove Partners |
1,082,120 |
2.44 |
-1,035,369 |
12/31/20 |
| Renaissance Technologies LLC |
1,066,643 |
2.39 |
127,600 |
3/31/21 |
| HN Saltoro Capital, LP |
958,553 |
2.15 |
304,637 |
3/31/21 |
| Nuveen LLC |
940,720 |
2.12 |
-77,836 |
12/31/20 |
| Charles Schwab Investment Management, Inc. |
796,743 |
1.79 |
5,386 |
12/31/20 |
| Jacobs Levy Equity Management, Inc. |
772,169 |
1.74 |
-115,311 |
12/31/20 |
| Millennium Management LLC |
734,980 |
1.66 |
499,073 |
12/31/20 |
| Wellington Management Company, LLP |
721,024 |
1.62 |
20,186 |
12/31/20 |
| BlackRock Advisors (UK) Limited |
677,874 |
1.52 |
620,705 |
4/30/21 |
| Geode Capital Management, L.L.C. |
637,637 |
1.43 |
125,670 |
3/31/21 |
| Becker (Todd A) |
620,145 |
1.40 |
17,296 |
3/19/21 |
| Monarch Partners Asset Management LLC |
579,469 |
1.30 |
579,469 |
3/31/21 |
| Invesco Capital Management LLC |
516,168 |
1.16 |
57,489 |
12/31/20 |
| Goldman Sachs Asset Management, L.P. |
481,366 |
1.08 |
-81,678 |
12/31/20 |
| Driehaus Capital Management, LLC |
476,630 |
1.07 |
476,630 |
3/31/21 |
| Morgan Stanley & Co. LLC |
473,318 |
1.07 |
348,186 |
12/31/20 |
| JP Morgan Asset Management |
427,509 |
0.96 |
-70,919 |
3/31/21 |
| Northern Trust Investments, Inc. |
403,789 |
0.90 |
-239,425 |
3/31/21 |
| Parallax Volatility Advisers, L.P. |
362,542 |
0.81 |
362,181 |
3/31/21 |
| BlackRock Investment Management (UK) Ltd. |
354,816 |
0.80 |
319,388 |
3/31/21 |
| Treuer (Alain) |
343,154 |
0.77 |
4,505 |
5/7/21 |
| Mellon Investments Corporation |
333,356 |
0.75 |
63,558 |
3/31/21 |
| Norges Bank Investment Management (NBIM) |
304,200 |
0.69 |
304,200 |
12/31/20 |
| Principal Global Investors (Equity) |
289,962 |
0.65 |
59,382 |
3/31/21 |
| Northern Trust Global Investments |
269,338 |
0.60 |
-5,341 |
3/31/21 |
| J.P. Morgan Securities plc |
267,682 |
0.60 |
267,682 |
3/31/21 |
| Columbia Threadneedle Investments (US) |
252,989 |
0.57 |
-3,119 |
12/31/20 |
| Moore Capital Management, LP |
238,260 |
0.54 |
-5,270 |
12/31/20 |
| Cooper Creek Partners Management LLC |
215,651 |
0.48 |
-19,655 |
3/31/21 |
| Bridgeway Capital Management, LLC |
211,650 |
0.48 |
-- |
12/31/20 |
| BlackRock Investment Management, LLC |
210,348 |
0.47 |
49,876 |
3/31/21 |
| Citadel Advisors LLC |
207,620 |
0.47 |
-32,202 |
12/31/20 |
| Hoovestol (Wayne B) |
192,936 |
0.43 |
4,505 |
5/7/21 |
| Moody Aldrich Partners, LLC |
183,909 |
0.41 |
183,909 |
3/31/21 |
| Portolan Capital Management, L.L.C. |
181,684 |
0.41 |
-111,617 |
12/31/20 |
| Deutsche Asset Management Americas |
181,216 |
0.41 |
-95,378 |
3/31/21 |
| Thompson, Siegel & Walmsley LLC |
178,958 |
0.40 |
138,958 |
3/31/21 |
| Simpkins (G Patrich Jr) |
176,750 |
0.40 |
-2,823 |
3/19/21 |