Gates Foundation Buys $8.8M Worth of AutoNation

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 Friday 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.

Autonation (AN) Bill & Melinda Gates Foundation O 500,000 $8,813,917 Century Aluminum (CENX) Glencore Ag BO 850,000 $7,403,500 Health Benefits Direct (HBDT) Co-investment Fund II LP BO 6,108,997 $1,221,799 Mosys (MOSY) Perham Leonard Charles CEO,PR,DIR 75,000 $183,750 Stream Global Services (SGS) Ayala Corp BO 28,264 $169,584 Morgans Hotel Group (MHGC) Knetzger Edwin L III DIR 50,000 $169,500 Mosys (MOSY) Berg Carl E DIR 53,537 $131,166 Apollo Group (APOL) Giusto Stephen DIR 1,000 $58,191 Privatebancorp (PVTB) Head Wallace L CEO 5,000 $45,996 Duncan Energy LP (DEP) Bachmann Richard H CEO,PR,DIR 2,000 $41,712

Microsoft (MSFT) Gates William H III DIR 2,000,000 $56,316,200 Core Laboratories N V (CLB) Demshur David M CEO,PR,DIR 100,000 $10,749,793 Core Laboratories N V (CLB) Bergmark Richard L CFO,DIR, VP,TR 50,000 $5,247,935 M&t Bank (MTB) Pereira Jorge G VCB,DIR 42,300 $2,770,360 Meritage Homes (MTH) Sarver Robert Gary DIR 132,500 $2,478,304 Carnival (CCL) Arison Micky Meir CB,CEO, DIR,BO 76,221 $2,310,980 Core Laboratories N V (CLB) Davis Monty L COO 17,778 $1,855,996 Berkshire Hathaway (BRK.B) Bill & Melinda Gates Foundation BO BO $1,653,549 Stanley (SXE) Karlson William E DIR 40,000 $1,123,800 Boston Scientific (BSX) Abele John E DIR 125,000 $1,029,143

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.