| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Tang Capital Management, LLC | 631,561 | 5.83 | 3,827,259 | 2012-12-31 | | Redmile Group, LLC | 577,465 | 5.33 | 3,228,029 | 2013-03-31 | | Ayer Capital Management, LP | 220,593 | 2.04 | 1,336,793 | 2012-12-31 | | Allianz Asset Management AG | 184,207 | 1.70 | 1,116,294 | 2012-12-31 | | Goldman Sachs Group, Inc. | 117,467 | 1.08 | 711,850 | 2012-12-31 | | Invesco Private Capital Inc. | 116,316 | 1.07 | 704,874 | 2012-12-31 | | Vanguard Group, Inc. (The) | 79,428 | 0.73 | 444,002 | 2013-03-31 | | Steinberg Global Asset Management, Ltd. | 43,418 | 0.40 | 242,706 | 2013-03-31 | | Geode Capital Management, LLC | 41,034 | 0.38 | 229,380 | 2013-03-31 | | Dimensional Fund Advisors LP | 29,408 | 0.27 | 164,390 | 2013-03-31 |
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| Holder | Shares | % Out | Value* | Reported |
|---|
| Vanguard Extended Market Index Fund | 76,778 | 0.71 | 465,274 | 2012-12-31 | | Spartan Extended Market Index Fund | 28,189 | 0.26 | 157,576 | 2013-03-31 | | DFA U.S. Micro Cap Series | 13,270 | 0.12 | 73,383 | 2013-01-31 | | Spartan Total Market Index Fund | 11,529 | 0.11 | 64,447 | 2013-03-31 | | Claymore ETF Tr-Wilshire Micro Cap ETF | 4,893 | 0.05 | 27,351 | 2013-03-31 | | DFA U.S. Core Equity 1 Portfolio | 3,700 | 0.03 | 20,461 | 2013-01-31 | | Curian Series Tr-Curian DFA U.S. Micro Cap Fund | 2,000 | 0.02 | 12,120 | 2012-12-31 | | DFA U.S. Core Equity 2 Portfolio | 1,771 | 0.02 | 9,793 | 2013-01-31 | | Fidelity NASDAQ Composite Index Fund | 968 | 0.01 | 5,411 | 2013-03-31 | | John Hancock Var Ins Tr-Total Stock Market Index Tr | 637 | 0.01 | 3,860 | 2012-12-31 |
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View Transactions for Insiders & Institutional Holders Value shown is computed using the security's price on the report date given. Currency in USD. |