| Name |
Shares |
Estimated Value of Shares * |
Holdings |
Shares Outstanding |
Turnover Rating |
| Ridgeback Capital Management, L.L.C. |
2.96 M |
14.82 M |
2.20% |
9.88% |
High |
| Millennium Management, L.L.C. |
2.44 M |
14.81 M |
0.09% |
8.13% |
High |
| Davidson Kempner Capital Management, L.L.C. |
2.81 M |
14.05 M |
0.53% |
9.37% |
High |
| Visium Capital Management |
2.14 M |
10.68 M |
1.10% |
7.12% |
High |
| HealthCor Management, L.P. |
2.09 M |
9.52 M |
0.42% |
6.98% |
High |
| Baker Brothers Advisors, L.L.C. |
1.14 M |
5.69 M |
0.49% |
3.79% |
Low |
| Henderson Global Investors Ltd. |
833,556 |
4.17 M |
0.01% |
2.78% |
Low |
| Balyasny Asset Management LP |
762,127 |
3.81 M |
0.26% |
2.54% |
High |
| Bass Brothers |
300,000 |
1.50 M |
0.09% |
1.00% |
High |
| J. P. Morgan Ventures Corporation |
285,000 |
1.42 M |
0.09% |
0.95% |
High |
Total % of Shares Owned by:
- Top 10 Holders
- 52.55%
- Top 25 Holders
- 54.51%
- Top 50 Holders
- 54.51%
* Value of shares is estimated based on the closing price of the month in which the shares were purchased.