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 Friday, August 05, 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.

Exco Resources (XCO) Wl Ross & Co BO 4,153,204 $61,301,620
Kior (KIOR) Peterson Stuart L BO 396,208 $5,235,405
Six Flags Entertainment (SIX) Reid Anderson James CB,PR
78,645 $2,499,189
Kansas City Southern (KSU) Haverty Michael R CB,DIR 28,000 $1,594,295
Handy & Harman (HNH) SPH Group BO 113,000 $1,581,774
Kinder Morgan Management (KMR) Kinder Richard D CB,CEO
25,000 $1,505,571
Morgan Stanley (MS) Taubman Paul J PR 50,000 $1,019,235
Kinder Morgan (KMI) Kinder Richard D CB,CEO
24,600 $679,621
Morgan Stanley (MS) Porat Ruth CFO 25,000 $512,500
Tupperware Brands (TUP) Goings E V CB,CEO
8,360 $507,045
Green Mountain Coffee Roasters (GMCR) Stiller Robert P CB,DIR
500,000 $53,716,648
Martin Marietta Materials (MLM) Spo Advisory Corp BO 672,200 $46,800,936
Under Armour (UA) Plank Kevin A PR,CEO
138,150 $9,114,541
Acme Packet (APKT) Melampy Patrick J CTO,DIR 60,000 $3,342,360
Under Armour (UA) Plank J Scott VP,BD 46,875 $3,087,832
Questcor Pharmaceuticals (QCOR) Medeiros David Jeffrey VP,OO 94,500 $2,946,510
Rackspace Hosting (RAX) Moorman Lew PR,DIR 74,750 $2,931,463
Telenav (TNAV) Koh Soo Boon DIR 118,105 $1,810,000
Marchex (MCHX) Horowitz Russell C CEO,DIR
90,000 $831,609
Synchronoss Technologies (SNCR) McCormick James M DIR,BO 25,000 $827,250

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.