Top Insider Trades: DGI NATR WPZ EL

By Jonathan Moreland, founder of Insider Insights and author of Profit From Legal Insider Trading.

NEW YORK ( TheStreet) -- It is a victory for common sense. Tracking the trading behavior of company executives, directors and large shareholders in the stocks of firms they're registered in as "insiders" has proven to be profitable, according to both academic studies and (more importantly) the experience of professional investors.

Below are lists of the top 10 mainly open-market insider purchases and sales filed at the Securities and Exchange Commission Monday, March 11, 2013 as ranked by dollar value. Please note, however, that these are only factual lists, not buy and sell recommendations. Dollar value is only one metric to assess the importance of an insider transaction, and, frankly, often not even the most important metric that determines if an insider transaction is significant.

At, we find new investment ideas just about every day using these and more intricate insider screens to determine where we should focus our subsequent fundamental and technical analysis. And while stocks don't (or shouldn't) move up or down based on insider activity alone, insiders tend to be good indicators of when real stock-moving events like earnings surprises, corporate actions, and new products may be in the offing.

So use these regular Top Insider Trades columns as the initial research tools they are meant to be, and click the links in the tables to analyze a company's or insider's full insider history. Also feel free to contact us with any questions on our proprietary insider data, and how it is best analyzed.
Williams Part. (WPZ) Williams Cos. BO 3,000,000 142,980,000
Triangle (TPLM) GFW Energy X DIR,BO 9,300,000 55,800,000
Tiffany (TIF) Qatar BO 182,779 12,824,385
Nat. Sun. (NATR) Mesdag Willem DIR,BO 367,447 5,204,358
Dexcom (DXCM) Skyler Jay DIR 70,000 1,085,000
Aveo (AVEO) Termeer Henri DIR 55,499 373,736
Universal Stain. (USAP) Pennant BO 9,100 326,787
Opko (OPK) Frost Phillip CEO,CB,BO 43,000 315,264
Hyperdynamics (HDY) Owen David DIR 395,077 224,009
Calumet (CLMT) Straumins Jennifer PR,COO 5,200 201,578
Source: Insider Insights
Digitalglobe (DGI) Feinberg Stephen BO 5,000,000 141,500,000
Estee Lauder (EL) Lauder Leonard CB,DIR,BO 250,000 16,422,800
Mastercard (MA) Mastercard Fdn BO 24,963 13,187,955
Estee Lauder (EL) Grat Trust TT,BO 200,000 13,146,019
Carpenter (CRS) Hicks Thomas DIR 154,041 7,252,928
Td (AMTD) Tomczyk Fredric CEO,DIR 200,000 4,119,750
Chicago Bridge (CBI) Petterson Lasse COO 64,966 3,663,141
Macquarie (MIC) Macquarie Infra DIR 65,000 3,341,000
Vitran (VTNC) Tfi BO 500,000 3,100,000
Sun (SNHY) Koski Christine DIR,BO 90,000 2,897,155
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.