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 Tuesday, May 24, 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 Biotics (CHBT) Value Holdings Capital BO 350,000 $3,479,656
Kinder Morgan (KMI) Street James E VP,HR 72,800 $2,067,908
Adpt Corp (ADPT) Steel Partners BO 385,200 $1,118,848
Move (MOVE) Freshford Capital Mgt BO 356,600 $712,700
Hot Topic (HOTT) Drapkin Matthew A DIR 96,000 $691,418
Swisher Hygiene (SWSH) Hudson Harris W DIR 96,870 $551,781
American Assets Trust (AAT) Rady Ernest S CB,DIR
25,000 $535,182
China Biologic (CBPO) Warburg Pincus Private Equity DIR,BO 34,899 $518,919
Fluidigm (FLDM) Jones Evan DIR 29,700 $424,331
Banyan Rail Services (BARA) Marino Gary O PR,CEO
150,000 $300,000
Rural Metro (RURL) Falck Danmark BO 418,498 $7,152,131
Gamestop (GME) Dematteo Daniel A CB,DIR 200,000 $5,547,940
Validus Holdings (VR) Singh Alok DIR 157,683 $5,148,871
Microstrategy (MSTR) Saylor Michael J CB,PR
30,000 $4,206,542
Lumber Liquidators (LL) Sullivan Thomas D CB,F
101,740 $2,648,353
McKesson (MCK) Julian Paul C VP,PR 20,586 $1,725,309
Advance America (AEA) Johnson George D Jr BO 254,197 $1,491,199
Pride International (PDE) Looser W Gregory VP 34,951 $1,458,855
Kinder Morgan Management (KMR) Street James E VP,HR 20,625 $1,321,153
Maxwell Technologies (MXWL) Cortes Jose DIR 76,200 $1,216,156

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, 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 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.