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 mainly open-market insider purchases and sales filed at the Securities and Exchange Commission Wednesday, December 14, 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.

Wright Medical (WMGI) OEPW Llc BO 325,000 $4,820,250
Pixelworks (PXLW) Becker Drapkin Management BO 614,400 $1,256,556
China Biologic Products (CBPO) Warburg Pincus Private Equity DIR,BO 79,365 $906,811
Spark Networks (LOV) Osmium Partners BO 222,855 $719,253
United Therapeutics Corp (UTHR) Rothblatt Martine A CEO,DIR 12,966 $539,089
Snyder S Lance (LNCE) Warehime Michael A CB,DIR
23,750 $501,484
Ebix (EBIX) Eckert Neil D DIR 24,500 $494,900
Ecolab (ECL) Sanders Daniel S DIR 5,000 $275,943
Authentidate (ADAT) Lazarus Investment Partners BO 297,658 $229,173
Cascade Microtech (CSCD) Delafield John D DIR,BO 71,600 $228,288
Dollar General (DG) Buck Holdings BO 27,944,138 $1,051,677,632
Bankrate (RATE) Ben HoldingL BO 14,072,872 $236,424,256
Google (GOOG) Page Lawrence CEO,DIR
83,334 $51,990,856
Virgin Media (VMED) Mooney James DIR 1,200,000 $25,538,324
Validus Holdings (VR) Levy Sander M DIR 686,771 $20,603,130
Exco Resources (XCO) Pickens Boone DIR 1,350,000 $14,046,310
Autozone (AZO) Lampert Edward S BO 39,491 $13,085,731
Hansen Natural (HANS) Schlosberg Hilton H VCB,PR
72,430 $6,929,090
Mohawk Industries (MHK) Lorberbaum Mark BO 67,500 $3,746,967
Google (GOOG) Arora Nikesh VP 4,556 $2,833,285

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.