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 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.

PrivateBancorp (PVTB) GTCR DIR,BO 4,147,580 $35,254,431 Adaptec (ADPT) Steel Partners II LP BO 981,659 $3,141,458 GFI Group (GFIG) Gooch Michael CB,CEO, DIR,BO 300,000 $1,464,000 Pier 1 Imports (PIR) Greek Investments Inc BO 207,440 $735,611 Zygo (ZIGO) Mak Capital One LLC BO 81,223 $581,901 DPL (DPL) Mccabe Daniel J VP 20,580 $525,074 Huntington Bancshares (HBAN) Steinour Stephen D CB,CEO, PR,DIR 139,000 $493,824 Beckman Coulter (BEC) Haggerty Charles A DIR 5,000 $320,966 PrivateBancorp (PVTB) Richman Larry D CEO,PR, DIR 26,000 $241,244 K-Sea Transportation LP (KSP) Dowling James J DIR 20,000 $235,976

Microsoft (MSFT) Gates William H III DIR 2,000,000 $55,944,200 Amazon.com (AMZN) Szkutak Thomas J CFO,VP 70,000 $8,280,978 IAC/ Interactivecorp (IACI) Liberty Media Corp BO 329,100 $6,254,419 Dreamworks Animation (DWA) Kendrick Katherine GC,SEC 87,143 $2,868,440 LKQ (LKQX) Flynn Donald F DIR 79,145 $1,382,814 Berkshire Hathaway (BRK.B) Bill & Melinda Gates Foundation BO 420 $1,378,548 Medassets (MDAS) Claudius LLC BO 55,584 $1,228,962 L 3 Communications Holdings (LLL) Washkowitz Alan H DIR 16,500 $1,211,595 Schnitzer Steel Industries (SCHN) Lewis Carol S BO 25,400 $1,116,140 Odyssey Healthcare (ODSY) Steffy David L DIR 69,391 $960,413

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.