Chairman Buys $6.4M Worth of Shaw Group

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 Wednesday 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.

Shaw Group (SHAW) Bernhard James M Jr CB,CEO, PR,DIR 250,000 $6,424,106 Online Resources (ORCC) Tennenbaum Capital Partners LLC BO 450,000 $2,281,433 First Bancorp Pr (FBP) Aleman Aurelio CEO,PR,DIR 100,000 $186,660 Harris Interactive (HPOL) Fingerhood Steven L DIR 100,000 $96,960 1st Source (SRCE) Murphy Christopher J III CB,CEO, DIR,BO 5,000 $71,650 Quality Systems (QSII) Barbarosh Craig A DIR 1,000 $59,447 Nurx Pharmaceuticals (NUXP) Baradaran Sharyar DIR 200,000 $50,000 Nurx Pharmaceuticals (NUXP) Padma-nathan Harin DIR 200,000 $50,000 Trans1 (TSON) Dann Mitchell DIR 12,500 $49,973 Compass Diversified Holds (CODI) Massoud I Joseph O 2,848 $29,983

Microsoft (MSFT) Gates William H III DIR 3,000,000 $83,528,700 Google (GOOG) Shriram Kavitark Ram DIR 6,900 $3,650,655 Berkshire Hathaway (BRK.B) Bill & Melinda Gates Foundation BO 1,100 $3,645,847 EResearchtechnology (ERES) Blum Capital Partners LP BO 359,397 $2,665,203 Radio One (ROIAK) Fine Capital Partners LP BO 1,400,000 $2,520,000 Sourcefire (FIRE) Roesch Martin F DIR, CTO 105,000 $2,082,146 Mednax (MD) Calabro Joseph M PR, COO 37,350 $2,043,172 Cameron International (CAM) Erikson Sheldon R DIR 36,256 $1,424,444 Danaher Corp (DHR) Ditkoff James H VP, FO 19,353 $1,365,712 Athenahealth (ATHN) Hull Brandon H DIR 31,000 $1,228,650

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, 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.