| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | DELAWARE MANAGEMENT BUSINESS TRUST | 1,449,684 | 2.49 | $23,934,282 | 30-Sep-09 | | COLUMBUS CIRCLE INVESTORS | 1,258,686 | 2.17 | $20,780,905 | 30-Sep-09 | | WEATHERBIE, M.A. & CO, INC. | 1,241,380 | 2.14 | $20,495,183 | 30-Sep-09 | | ARBOR CAPITAL MANAGEMENT, LLC | 1,116,200 | 1.92 | $18,428,462 | 30-Sep-09 | | Invesco Ltd. | 1,061,033 | 1.83 | $17,517,654 | 30-Sep-09 | | KALMAR INVESTMENTS INC. | 971,430 | 1.67 | $16,038,309 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 959,218 | 1.65 | $15,836,689 | 30-Sep-09 | | LUTHER KING CAPITAL MANAGEMENT | 956,250 | 1.65 | $15,787,687 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 915,975 | 1.58 | $15,122,747 | 30-Sep-09 | | JP MORGAN CHASE & COMPANY | 744,470 | 1.28 | $12,291,199 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | AIM DYNAMICS FUND | 643,061 | 1.11 | $10,616,937 | 30-Sep-09 | | LORD ABBETT DEVELOPING GROWTH FUND | 480,100 | .83 | $7,268,714 | 31-Oct-09 | | DELAWARE VIP TREND SERIES | 453,200 | .78 | $7,482,332 | 30-Sep-09 | | FMI FOCUS FD | 428,500 | .74 | $7,074,535 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 356,189 | .61 | $5,852,185 | 30-Nov-09 | | LKCM FUND-LKCM SMALL CAP EQUITY PORTFOLIO | 355,850 | .61 | $5,875,083 | 30-Sep-09 | | JP MORGAN SMALL CAP GROWTH FUND | 340,500 | .59 | $5,155,170 | 31-Oct-09 | | VANGUARD SMALL-CAP INDEX FUND | 316,185 | .54 | $3,515,977 | 30-Jun-09 | | NORTHWESTERN MUTUAL SER FD-SMALL CAP GROWTH STOCK PORTF | 289,250 | .50 | $4,775,517 | 30-Sep-09 | | AIM Global Small & Mid Cap Growth Fund | 258,621 | .45 | $4,269,832 | 30-Sep-09 |
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Value shown is computed using the security's price on the report date given.
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