| ArrowMark Colorado Holdings, LLC |
1,829,582 |
12.02 |
811,685 |
12/31/18 |
| iSystems Holdings, L.L.C. |
1,026,332 |
6.74 |
-500,000 |
6/14/18 |
| Red Oak Partners, LLC |
942,970 |
6.19 |
-- |
3/19/18 |
| The Vanguard Group, Inc. |
729,867 |
4.79 |
100,589 |
12/31/18 |
| Goepel (Patrick) |
670,097 |
4.40 |
10,000 |
8/24/18 |
| Alyeska Investment Group, L.P. |
660,000 |
4.34 |
285,000 |
12/31/18 |
| BlackRock Institutional Trust Company, N.A. |
653,027 |
4.29 |
-3,629 |
12/31/18 |
| Pacific Ridge Capital Partners, LLC |
536,825 |
3.53 |
33,306 |
12/31/18 |
| PenderFund Capital Management, Ltd. |
485,651 |
3.19 |
-73,100 |
12/31/18 |
| Marshall Wace LLP |
385,945 |
2.54 |
198,233 |
12/31/18 |
| Unterberg Capital, LLC |
340,000 |
2.23 |
340,000 |
9/30/18 |
| Dimensional Fund Advisors, L.P. |
312,340 |
2.05 |
-397 |
12/31/18 |
| Prescott Group Capital Management, LLC |
300,088 |
1.97 |
300,088 |
12/31/18 |
| Allianz Global Investors U.S. LLC |
274,113 |
1.80 |
-5,634 |
12/31/18 |
| Perritt Capital Management, Inc. |
208,800 |
1.37 |
-19,700 |
12/31/18 |
| Edmond de Rothschild Asset Management (France) S.A. |
193,040 |
1.27 |
193,040 |
9/30/17 |
| J.P. Morgan Securities LLC |
176,137 |
1.16 |
139,015 |
12/31/18 |
| State Street Global Advisors (US) |
149,471 |
0.98 |
-211 |
12/31/18 |
| Waterfield (John Randall) |
148,136 |
0.97 |
2,000 |
8/24/18 |
| SEI Investments Management Corporation |
145,981 |
0.96 |
-- |
1/31/19 |
| Morgan Stanley & Co. LLC |
139,893 |
0.92 |
120,014 |
12/31/18 |
| Northern Trust Investments, Inc. |
139,409 |
0.92 |
-303 |
12/31/18 |
| Geode Capital Management, L.L.C. |
132,250 |
0.87 |
6,418 |
12/31/18 |
| Florida State Board of Administration |
130,383 |
0.86 |
74,263 |
3/31/18 |
| Bard Associates Inc. |
113,993 |
0.75 |
-- |
12/31/18 |
| Jacobs Levy Equity Management, Inc. |
104,728 |
0.69 |
-- |
8/31/17 |
| Parametric Portfolio Associates LLC |
94,177 |
0.62 |
45,316 |
12/31/18 |
| New Jersey Division of Investment |
94,000 |
0.62 |
8,000 |
12/31/18 |
| Jane Street Capital, L.L.C. |
81,267 |
0.53 |
81,267 |
12/31/18 |
| Altair Advisers LLC |
77,720 |
0.51 |
4,120 |
12/31/18 |
| Deutsche Asset Management Americas |
60,715 |
0.40 |
34,726 |
12/31/18 |
| Raymond James Financial Services Advisors, Inc. |
59,600 |
0.39 |
247 |
12/31/18 |
| Renaissance Technologies LLC |
48,300 |
0.32 |
-79,500 |
12/31/18 |
| BNY Mellon Asset Management |
47,015 |
0.31 |
15,635 |
12/31/18 |
| Monarch Partners Asset Management LLC |
41,689 |
0.27 |
-12,911 |
12/31/18 |
| Citadel LLC |
38,136 |
0.25 |
19,189 |
12/31/18 |
| Skylands Capital, LLC |
37,309 |
0.25 |
-333,725 |
12/31/18 |
| T. Rowe Price Associates, Inc. |
37,046 |
0.24 |
11,900 |
12/31/18 |
| Nuveen LLC |
33,915 |
0.22 |
7,574 |
12/31/18 |
| California Public Employees' Retirement System |
33,555 |
0.22 |
-- |
12/31/18 |
| Spark Investment Management LLC |
33,000 |
0.22 |
33,000 |
12/31/18 |
| BlackRock Investment Management, LLC |
32,334 |
0.21 |
-337 |
12/31/18 |
| Sepio Capital, LLC |
31,660 |
0.21 |
31,660 |
12/31/18 |
| Karbowski (James Joseph) |
30,000 |
0.20 |
10,000 |
8/24/18 |
| Sandberg (David) |
27,415 |
0.18 |
2,000 |
8/24/18 |
| Callan LLC |
27,328 |
0.18 |
-35,165 |
9/30/18 |
| Charles Schwab Investment Management, Inc. |
23,660 |
0.16 |
-3,700 |
12/31/18 |
| Behrent (Matthew K) |
23,189 |
0.15 |
2,000 |
8/24/18 |
| Commonwealth Financial Network |
23,058 |
0.15 |
-5,000 |
12/31/18 |
| Cubist Systematic Strategies, LLC |
22,890 |
0.15 |
22,773 |
12/31/18 |
