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 Monday, April 25, 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.

Hasbro (HAS) Goldner Brian PR,CEO
DIR
10,000 $448,500
Sagent Holding (SGNT) Kung Frank DIR 20,000 $320,000
Wells Fargo (WFC) Sloan Timothy J VP,CFO 10,000 $285,400
Stag Industrial (STIR) Sullivan Gregory W CFO,VP
TR
15,834 $192,330
First Niagara Financial (FNFG) Jeremiah Barabara S DIR 10,000 $137,930
USG (USG) Lavin Richard P DIR 6,700 $100,559
TCW Strategic Inc Fund (TSI) Rivelle Tad O 16,000 $87,360
Noranda Aluminum (NOR) Schumacher Alan H DIR 5,000 $75,901
Opko Health (OPK) Frost Phillip Md CEO,CB
DIR,BO
20,000 $74,804
Sealy (ZZ) Replogle John B DIR 25,000 $71,250
Source: www.InsiderInsights.com
Amarin Corp Plc (AMRN) Orbimed Advisors DIR 750,000 $12,500,000
Apollo Group (APOL) Sperling John G CB,DIR
BO
200,000 $7,872,914
Discovery Communications (DISCA) Malone John C DIR,BO 174,074 $7,185,775
Intralinks Holdings (IL) TA Associates DIR,BO 220,000 $6,623,298
Ameristar Casinos (ASCA) Par Capital Mgt BO 249,272 $4,820,471
MetroPCS Communications (PCS) TA Associates DIR 200,000 $3,353,160
Capital One Financial (COF) Perlin Gary L CFO 35,584 $1,903,744
IRobot (IRBT) Greiner Helen DIR 47,100 $1,711,270
Bank Of The Ozarks (OZRK) Gleason George G Ii CB,CEO
DIR,BO
36,000 $1,601,532
Global Power Equipment (GLPW) PPM America Capital BO 51,548 $1,431,400
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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