| Van Eck Associates Corporation -- | -- | Direct | -- | Jun 17, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Jun 13, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Jun 11, 2019 |
| Van Eck Associates Corporation -- | Decrease at price 4.05 per share. | Direct | 757,512 | Jun 10, 2019 |
| Van Eck Associates Corporation -- | Bought at price 4.05 per share. | Direct | 676,179 | Jun 7, 2019 |
| Weiss Asset Management -- | Bought at price 4.02 per share. | Direct | 518,125 | Jun 7, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Jun 5, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 20, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | May 20, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 16, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 15, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 14, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 13, 2019 |
| Majedie Asset Management, Ltd. -- | Sold at price 3.43 per share. | Direct | 1,008,399 | May 13, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 10, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 8, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | May 8, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | May 7, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | May 7, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | May 6, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | May 3, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | May 2, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 29, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 29, 2019 |
| Majedie Asset Management, Ltd. -- | Sold at price 3.87 per share. | Direct | 364,929 | Apr 29, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 26, 2019 |
| Majedie Asset Management, Ltd. -- | Sold at price 3.97 per share. | Direct | 1,228,583 | Apr 25, 2019 |
| Majedie Asset Management, Ltd. -- | Sold at price 4.00 per share. | Direct | 381,000 | Apr 24, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 24, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 23, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 23, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 18, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 16, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 15, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 11, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 10, 2019 |
| D. E. Shaw & Co., L.P -- | -- | Direct | -- | Apr 10, 2019 |
| EXOR Investments (UK) LLP -- | Increase at price 0.27 per share. | Direct | 455,728 | Apr 10, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 9, 2019 |
| EXOR Investments (UK) LLP -- | Bought at price 4.82 per share. | Direct | 1,002,560 | Apr 8, 2019 |
| EXOR Investments (UK) LLP -- | Bought at price 0.75 per share. | Direct | 292,800 | Apr 8, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Apr 5, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Mar 28, 2019 |
| Jane Street Capital LLC -- | Increase at price 4.50 per share. | Direct | 36,366,223 | Mar 27, 2019 |
| Van Eck Associates Corporation -- | -- | Direct | -- | Mar 26, 2019 |
| Van Eck Associates Corporation -- | Decrease at price 4.23 per share. | Direct | 682,650 | Mar 19, 2019 |
| Van Eck Associates Corporation -- | Sold at price 4.12 per share. | Direct | 11,003,036 | Mar 15, 2019 |
| Van Eck Associates Corporation -- | Decrease at price 4.25 per share. | Direct | 3,807,655 | Feb 28, 2019 |
| Ruffer LLP -- | Sold at price 4.26 per share. | Direct | 294,357 | Feb 27, 2019 |
| Ruffer LLP -- | Sold at price 4.39 per share. | Direct | 574,659 | Feb 26, 2019 |