By Jonathan Moreland, founder of Insider Insights and author of Profit From Legal Insider Trading.

NEW YORK ( TheStreet) -- Which insiders are selling and buying chunks of stocks?

Below are lists of the top 10 open-market insider purchases and sales filed at the Securities and Exchange Commission Thursday, May 26, 2011 as ranked by dollar value. Company executives and directors are in the best position to assess the attractiveness of their firms' shares, and here is how many of them are voting their wallets! Please note, however, that these are factual lists, not buy and sell recommendations. Dollar value is only one metric to assess the importance of an insider transaction.

China Biologic Products (CBPO) Warburg Pincus Private Equity DIR,BO 292,476 $4,441,185
Furiex Pharmaceuticals (FURX) Eshelman Fredric N DIR 264,516 $4,052,192
Cost Plus (CPWM) Mesdag Willem DIR,BO 129,700 $1,151,392
Medtronic (MDT) Schuler Jack W DIR 25,000 $1,017,610
China Biotics (CHBT) Value Holdings Capital BO 85,154 $742,573
Chinacast Education (CAST) Fir Tree LLC BO 100,000 $581,800
Solar Senior Capital (SUNS) Gross Michael S CEO,PR
DIR
23,000 $413,864
Lihua International (LIWA) Magnify Wealth Enterprise BO 40,000 $298,852
Dupont Fabros Technology (DFT) Malek Frederic V DIR 10,100 $252,215
General Motors (GM) Isdell E Neville DIR 8,000 $244,640
Source: www.InsiderInsights.com
Clearwire (CLWR) Intel Corp BO 1,520,000 $7,073,600
Qlik Technologies (QLIK) Golden Bruce DIR 150,000 $4,855,515
Ventas (VTR) Cafaro Debra A CB,CEO
DIR
74,070 $4,074,450
Lumber Liquidators (LL) Sullivan Thomas D CB,F
DIR
137,500 $3,598,100
Illinois Tool Works (ITW) McCormack Robert C DIR 62,100 $3,525,442
VMware (VMW) Nielsen Tod PR 28,683 $2,789,422
Validus Holdings (VR) Singh Alok DIR 67,200 $2,150,548
Maximus (MMS) Ruddy Raymond B DIR 25,000 $2,022,487
Hub Group (HUBG) Yeager Mark A VCB,PR
COO,DIR
50,000 $1,824,850
Savvis (SVVS) Ousley James E CB,CEO
DIR
40,499 $1,590,871
Source: www.InsiderInsights.com

Key to Titles:A=Assistant, AI=Affiliated Investor, AO=Accounting Officer, BD=Business Development, BO=Beneficial Owner, CAO=Chief Accounting Officer, CB=Chairman, CCO=Chief Compliance Officer, CEO=Chief Executive Officer, CFO=Chief Financial Officer, CIO=Chief Information Officer, CO=Compliance Officer, COO=Chief Operating Officer, CT=Controller, CTO=Chief Technology Officer, DIR=Director, EVP=Executive Vice President, F=Founder, FO=Financial Officer, GC=General Counsel, HR=Human Resources, IO=Information Officer, IR=Investor Relations, LO=Legal Officer, MD=Managing Director, O=Officer, OO=Operating Officer, PR=President, PT=Partner, REL=Relative of an insider, SEC=Secretary, SH=Shareholder, SO=Sales Officer, TO=Technology Officer, TR=Treasurer, TT=Trustee, VCB=Vice Chairman, VP=Vice President, X=Ex Officer or other title displayed.

Jonathan Moreland is the founder of InsiderInsights.com, which produces a weekly newsletter and offers professional screening and alerting tools to analyze a proprietary, real-time insider data feed. He is also the principal of Insider Asset Management, a registered investment advisor in New York. Mr. Moreland has been analyzing insider data professionally for two decades and has been a contributor to TheStreet.com since 2001. A fundamental analyst with an MBA in finance, Mr. Moreland long ago identified insider data as an excellent first screen to determine where to focus his research efforts. He is quoted frequently in the media for his insider analysis and stock recommendations stemming from it. He is also author of Profit From Legal Insider Trading.

Under no circumstances does the information in this column represent a recommendation to buy or sell stocks. While he cannot provide investment advice or recommendations, Moreland appreciates your feedback; click here to send him an email.