| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Barclays Global Investors UK Holdings Ltd | 4,033,829 | 5.36 | $22,266,736 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 1,877,194 | 2.50 | $10,362,110 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,556,291 | 2.07 | $8,590,726 | 30-Sep-09 | | FMR LLC | 9,470,400 | 12.59 | $52,276,608 | 30-Sep-09 | | STATE STREET CORPORATION | 1,207,285 | 1.60 | $6,664,213 | 30-Sep-09 | | Invesco Ltd. | 880,696 | 1.17 | $4,861,441 | 30-Sep-09 | | NORTHERN TRUST CORPORATION | 703,875 | .94 | $1,787,842 | 30-Jun-09 | | OBERWEIS ASSET MANAGEMENT INC. | 644,300 | .86 | $3,556,536 | 30-Sep-09 | | TIAA-CREF INVESTMENT MANAGEMENT, LLC | 528,699 | .70 | $2,918,418 | 30-Sep-09 | | BOGLE INVESTMENT MANAGEMENT LP | 408,708 | .54 | $2,256,068 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY GROWTH COMPANY FUND | 7,516,200 | 9.99 | $41,489,424 | 30-Sep-09 | | FIDELITY ADVISOR GROWTH OPPORTUNITIES FUND | 1,524,900 | 2.03 | $8,417,448 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 959,150 | 1.27 | $5,294,508 | 30-Sep-09 | | DFA U.S. SMALL CAP VALUE SERIES | 846,754 | 1.13 | $982,234 | 30-Apr-09 | | ISHARES NASDAQ BIOTECHNOLOGY INDEX FUND | 685,782 | .91 | $2,441,383 | 31-Oct-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 599,572 | .80 | $1,522,912 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 560,439 | .74 | $1,423,515 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 502,881 | .67 | $2,775,903 | 30-Sep-09 | | VARIABLE INSURANCE PRODUCTS FD III-GROWTH OPPORTUNITIES | 429,300 | .57 | $2,369,736 | 30-Sep-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 411,328 | .55 | $1,044,773 | 30-Jun-09 |
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Value shown is computed using the security's price on the report date given.
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