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.

Hallmark Financial Services (HALL) Detroit Stoker Co CB 150,000 $1,153,500 Rofin Sinar Technologies (RSTI) Wirth Peter DIR 34,700 $567,519 Dean Foods (DF) Engles Gregg L CB,DIR 30,000 $481,380 OpenTV (OPTV) Kudelski Andre DIR,BO 252,532 $391,425 NBT Bancorp (NBTB) Murphy Michael M DIR 12,000 $247,800 Nuveen Quality Pref Inc Fund (JTP) Lieb Mark O 38,500 $246,040 Phoenix Technologies (PTEC) Ramius LLC BO 55,836 $152,071 Ruralmetro Corp (RURL) Brucker Jack E CEO,PR, DIR 25,000 $140,830 Nuveen Perf Plus Muni Fund (NPP) Bank Of America Corp BO 9,000 $122,048 WSFS Financial (WSFS) Cheleden Charles G DIR 4,100 $119,269

Wal Mart Stores (WMT) Scott H Lee Jr CB,DIR 244,414 $13,029,710 Cornell Companies (CRN) Wynnefield Partners Sm Cap Value LP BO 520,000 $11,440,000 Lumber Liquidators (LL) Sullivan Thomas D CB,DIR, BO 168,346 $4,253,026 Berkshire Hathaway (BRK.B) Bill & Melinda Gates Foundation BO 710 $2,438,177 Amazon Com (AMZN) Wilke Jeffrey A VP 16,814 $2,240,269 Amazon Com (AMZN) Jassy Andrew R VP 14,561 $1,918,374 Amazon Com (AMZN) Kessel Steven VP 13,091 $1,724,237 Boston Scientific (BSX) Nicholas Peter M DIR 205,482 $1,702,652 Amazon Com (AMZN) Wilson L Michelle VP 12,516 $1,667,547 Steiner Leisure Ltd (STNR) Warshaw Clive E CB,DIR 38,000 $1,581,622

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.