PDI, Inc. (PDII)

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Top Institutional Holders
Holder Shares % Out Value* Reported
DIMENSIONAL FUND ADVISORS LP 1,156,019 7.85 8,196,174 Jun 30, 2011
RENAISSANCE TECHNOLOGIES, LLC 586,100 3.98 4,155,449 Jun 30, 2011
Pekin Singer Strauss Asset Management 516,825 3.51 3,664,289 Jun 30, 2011
ESSEX INVESTMENT MANAGEMENT CO INC 494,708 3.36 3,507,479 Jun 30, 2011
GRANAHAN INVESTMENT MANAGEMENT INC. 306,060 2.08 2,169,965 Jun 30, 2011
HEARTLAND ADVISORS INC. 2,055,814 13.96 14,575,721 Jun 30, 2011
ROYCE & ASSOCIATES, LLC 1,567,797 10.65 11,115,680 Jun 30, 2011
VANGUARD GROUP, INC. (THE) 292,553 1.99 2,074,200 Jun 30, 2011
BlackRock Institutional Trust Company, N.A. 288,446 1.96 2,045,082 Jun 30, 2011
MESSNER & SMITH THEME/VALUE INVESTMENT MANAGEMENT, LTD 112,175 0.76 795,320 Jun 30, 2011

Top Mutual Fund Holders
Holder Shares % Out Value* Reported
HEARTLAND VALUE FUND 1,096,323 7.45 8,891,179 Mar 31, 2011
ROYCE MICRO-CAP FUND 1,015,694 6.90 7,201,270 Jun 30, 2011
ROYCE CAPITAL FUND-MICRO-CAP PORTFOLIO 478,720 3.25 3,394,124 Jun 30, 2011
Unified Series Trust-Appleseed Fund 444,402 3.02 3,150,810 Jun 30, 2011
DFA U.S. SMALL CAP VALUE SERIES 342,278 2.32 2,967,550 Apr 30, 2011
VANGUARD VARIABLE INSURANCE FUND-SMALL COMPANY GROWTH 305,400 2.07 2,476,794 Mar 31, 2011
VANGUARD TOTAL STOCK MARKET INDEX FUND 174,583 1.19 1,415,868 Mar 31, 2011
Managers AMG Funds-Essex Small/Micro Cap Growth Fund 137,616 0.93 975,697 Jun 30, 2011
DFA U.S. MICRO CAP SERIES 131,394 0.89 1,139,185 Apr 30, 2011
DFA U.S. SMALL CAP SERIES 126,989 0.86 1,100,994 Apr 30, 2011