By Jonathan Moreland, founder of InsiderInsights.com 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 Thursday 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.
Texas Industries (TXI) Longleaf Partners Funds Trust BO 281,093 $9,222,135
VMware (VMW) Emc Corp BO 60,000 $4,338,528
Photronics (PLAB) GMT Capital Corp BO 83,905 $394,095
Primerica (PRI) Citigroup Inc DIR,BO 11,696 $246,694
Arrow Financial (AROW) Reisman Richard J Dmd DIR 2,000 $44,200
Life Partners Holdings (LPHI) Rafuse Harold DIR 2,000 $39,360
ADPT (ADPT) Steel Partners II LP BO 12,700 $37,680
Center Bancorp (CNBC) Seidman Lawrence B DIR,BO 5,000 $36,780
Tandy Leather Factory (TLF) Bandera Partners LLC BO 6,799 $27,816
Bank Of South Carolina (BKSC) Lane Hugh C Jr CEO,PR,
BO
1,992 $20,318
Source: www.InsiderInsights.com
Apollo Group (APOL) Sperling Peter V VCB,DIR 100,000 $4,767,170
Dolby Laboratories (DLB) Dolby Ray DIR,BO 20,000 $1,338,947
Salesforce.Com (CRM) Benioff Marc CB,CEO,
BO
10,000 $955,054
National Instruments (NATI) Truchard James J PR,DIR,
BO
24,830 $786,632
Hittite Microwave (HITT) Ayasli Yalcin BO 15,400 $716,936
Morningstar (MORN) Mansueto Joseph D CB,CEO 11,000 $489,203
Fortinet (FTNT) Xie Ken CEO,PR,
BO
30,000 $479,685
Marchex (MCHX) Horowitz Russell C CEO,DIR,
BO
106,605 $465,709
Boston Scientific (BSX) Abele John E DIR 75,000 $459,003
Nanometrics (NANO) Coates Norman V DIR,BO 50,000 $424,965
Source: www.InsiderInsights.com

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 InsiderInsights.com, 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 TheStreet.com 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.

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