Insiders Trading OPK, FRAN, PWON, GWRE

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 Tuesday, April 24, 2012 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.

Opko Health (OPK) Frost Phillip MD et al CEO,CB,BO 60,000 293,773
Powin (PWON) Lu Joseph CEO,DIR,BO 673,900 269,969
Global Indemnity (GBLI) Richmond Hill Investments BO 12,567 222,937
ZEP (ZEP) Morgan John K CB,PR,CEO 7,500 102,900
Intervest Bancshares (IBCA) Derosa Paul R DIR 25,000 99,500
Dover (DOV) Todd Stephen M DIR 1,500 89,880
Retractable Technologies (RVP) Shaw Thomas J CEO,DIR,BO 50,000 63,500
LGL (LGL) Gabelli Mario J BO 6,900 50,298
Castle Brands (ROX) Frost Phillip MD et al DIR,BO 178,737 50,046
Valhi (VHI) Simmons Harold C CB,DIR,BO 801 42,854
Source: Insider Insights
Francesca S (FRAN) Ccmp Capital DIR,BO 16,930,476 467,281,152
Guidewire Software (GWRE) Bay Partners X BO 2,000,000 56,500,002
Schwab Charles (SCHW) Schwab Charles R CB,DIR,BO 1,750,000 24,333,750
Guidewire Software (GWRE) Ryu Marcus CEO,DIR 494,247 13,962,478
Google (GOOG) Schmidt Eric E CB,DIR 20,000 12,054,332
Guidewire Software (GWRE) Ramsey Craig DIR 400,000 11,300,000
Danaher (DHR) Culp H Lawrence Jr PR,CEO,DIR 123,600 6,504,327
Unitedhealth (UNH) Rangen Eric S VP,CAO 37,925 2,244,732
Marriott International (MAR) Marriott J W Jr CB,DIR,BO 56,000 2,144,800
Houston American Energy (HUSA) Terwilliger John F CEO,DIR,BO 985,519 1,816,988
Source: Insider Insights

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.