| City Financial Investment Co Ltd | -- | Dec 31, 18 | -192.21K | -- |
| IMPAX ASSET MANAGEMENT LLC | 576.54K | Jun 30, 18 | +182.07K | -- |
| PEAK6 Group LLC | -- | Jun 30, 18 | -7.38K | -- |
| LUCUS ADVISORS LLC | 11.12K | Mar 31, 18 | -3.60K | -- |
| FNY Managed Accounts LLC | 200 | Mar 31, 18 | +200 | -- |
| Delpha Capital Management, LLC | -- | Mar 31, 18 | -671 | -- |
| Numeric Investors LLC | 1.07M | Dec 31, 17 | -24.70K | -- |
| CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC. | 224.80K | Dec 31, 17 | +71.80K | -- |
| AHL Partners LLP | 27.45K | Dec 31, 17 | -15.08K | -- |
| BB&T INVESTMENT SERVICES, INC. | 911 | Dec 31, 17 | +33 | -- |
| Hutchin Hill Capital, LP | -- | Dec 31, 17 | -27.80K | -- |
| Acrospire Investment Management LLC | -- | Sep 30, 17 | -1.59K | -- |
| TFS CAPITAL LLC | 37.72K | Jun 30, 17 | +37.72K | -- |
| Spot Trading L.L.C | -- | Mar 31, 17 | -1.75K | -- |
| BlackRock Institutional Trust Company, N.A. | 1.67M | Dec 31, 16 | -100.08K | -- |
| BlackRock Fund Advisors | 1.27M | Dec 31, 16 | +184.65K | -- |
| BLACKROCK ADVISORS LLC | 231.46K | Dec 31, 16 | -105.44K | -- |
| BlackRock Investment Management, LLC | 160.04K | Dec 31, 16 | -2.27K | -- |
| BlackRock Group LTD | 87.29K | Dec 31, 16 | +1.60K | -- |
| Thrax Management, LLC | 33.61K | Dec 31, 16 | +33.61K | -- |
| BlackRock Japan Co. Ltd | 1.04K | Dec 31, 16 | -2.15K | -- |
| MSI Financial Services Inc | 96 | Dec 31, 16 | -27.03K | -- |
| Emerald Acquisition Ltd. | 944.01K | Sep 30, 16 | -120.74K | -- |
| Sabal Capital Management, LLC | 234.14K | Sep 30, 16 | -12.45K | -- |
| Blue Clay Capital Management, LLC | 29.75K | Sep 30, 16 | +7.30K | -- |
| PEAR TREE ADVISORS INC | 79.40K | Jun 30, 16 | -- | -- |
| RUSSELL FRANK CO/ | 797.10K | Mar 31, 16 | +678.31K | -- |
| VIRGINIA RETIREMENT SYSTEM | 31.70K | Mar 31, 16 | +31.70K | -- |
| Invictus RG Pte. Ltd. | 8.46K | Sep 30, 15 | +8.46K | -- |
| PCO INVESTMENT MANAGEMENT LP | 197.17K | Jun 30, 15 | +146.77K | -- |
| MANAGED ACCOUNT ADVISORS LLC | 42.85K | Jun 30, 15 | +42.85K | -- |
| BOSTON PRIVATE BANK & TRUST CO | 2.02K | Mar 31, 15 | -150 | -- |
| SEI TRUST CO | 104.58K | Sep 30, 14 | +6.78K | -- |
| UBS AG | 86.24K | Sep 30, 14 | -728 | -- |
| CASTLEROCK ASSET MANAGEMENT INC | 38.22K | Sep 30, 14 | +38.22K | -- |
| MUNDER CAPITAL MANAGEMENT | -- | Sep 30, 14 | -5.71K | -- |
| SAC Capital Advisors LP | 14.14K | Mar 31, 14 | +14.14K | -- |
| CONNOR CLARK & LUNN INVESTMENT MANAGEMENT LTD | 33.10K | Dec 31, 13 | +33.10K | -- |
| NORTHERN TRUST CO OF CONNECTICUT | -- | Dec 31, 13 | -229.88K | -- |
| D. E. Shaw Heliant Adviser, L.L.C. | 49.22K | Sep 30, 13 | +49.22K | -- |
| KNIGHT CAPITAL GROUP LLC | 10.24K | Jun 30, 13 | +10.24K | -- |
| Irish Life Investment Managers Ltd. | 2.09K | Jun 30, 13 | -- | -- |
| MANULIFE INVESTMENT MANAGEMENT (US) LLC | 17.05K | Mar 31, 13 | +108 | -- |
| Manulife Investment Management (North America) Ltd | 10.65K | Mar 31, 13 | +442 | -- |