| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | KOPP INVESTMENT ADVISORS. INC. | 5,563,400 | 24.71 | $16,634,566 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 417,271 | 1.85 | $1,247,640 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 198,075 | .88 | $592,244 | 30-Sep-09 | | CALPERS (CALIFORNIA-PUBLIC EMPLOYEES RETIREMENT SYSTEM) | 45,410 | .20 | $169,833 | 30-Jun-09 | | NORTHERN TRUST CORPORATION | 33,633 | .15 | $125,787 | 30-Jun-09 | | Bank of New York Mellon Corporation | 26,596 | .12 | $79,522 | 30-Sep-09 | | Timber Hill LLC | 17,196 | .08 | $51,416 | 30-Sep-09 | | GEODE CAPITAL MANAGEMENT, LLC | 12,244 | .05 | $36,609 | 30-Sep-09 | | Oxford Asset Management | 12,074 | .05 | $36,101 | 30-Sep-09 | | BARCLAYS PLC | 2,590 | .01 | $7,744 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | VANGUARD EXTENDED MARKET INDEX FUND | 166,026 | .74 | $620,937 | 30-Jun-09 | | ISHARES Russell Micro Cap (TM) Index Fund | 23,258 | .10 | $69,541 | 30-Sep-09 | | VANGUARD BALANCED INDEX FUND | 13,815 | .06 | $51,668 | 30-Jun-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 12,244 | .05 | $36,609 | 30-Sep-09 | | QUANTITATIVE MASTER SERIES TR-EXTENDED MARKET INDEX SERI | 432 | .00 | $1,615 | 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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