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Top Insider Trades 11/14/12: GHDX, ASCMA, GNC, SNTA

|Includes: ASCMA, Genomic Health, Inc. (GHDX), GNC, MDGL

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In a victory for common sense, the trading behavior of company executives, directors, and large shareholders in the stocks of firms they're registered "insiders" at have been proven profitable to monitor by 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 Wednesday, November 14, 2012 as ranked by dollar value.

Please note, however, that these are factual lists (with edits to remove some noise), 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.

We should also point out that we are presently in a slow filing time for insiders because many companies still have their trading windows closed to their executives until their June quarter earnings are released.

But 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 blog posts 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 email with any questions on our proprietary insider data, and how it is best analyzed.

Insider Purchases
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Baker Felix DIR,BO Genomic Health GHDX B $25,726,487
Liberty Media BO Sirius Xm Radio SIRI B $11,048,134
Srinivasan Mallika DIR AGCO AGCO AB $6,891,412
Malone John C BO Ascent Capital ASCMA JB*,AB $5,129,908
Poses Frederic M DIR Chesapeake Energy CHK B $4,500,720
Greehey William E DIR,BO Nustar Gp NSH B $4,461,733
Stadium Capital BO Universal Tech Inst UTI B $2,445,581
Amundson Joy A DIR Covidien COV B $986,832
Kovner Bruce DIR,BO Synta Pharmaceuticals SNTA B $520,915
Falberg Kathryn E DIR Halozyme Therapeutics HALO B $260,500

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Ares Corporate Opp Fd O GNC GNC JS* $363,126,016
Ontario Teachers Pension DIR GNC GNC JS* $231,420,256
Duperreault Brian PR,CEO,DIR Marsh & McLennan MMC S $39,682,872
Conway John W CB,PR,CEO Crown CCK S $19,867,840
Page Lawrence CEO,DIR,BO Google GOOG AS $18,226,830
Cabela James W VCB,DIR,BO Cabelas CAB JS* $17,512,896
Lovett William Radford II DIR Everbank Financial EVER JS* $15,914,475
Schwab Charles R CB,DIR,BO Schwab Charles SCHW S $12,904,950
Bahna Ralph DIR Priceline Com PCLN S $6,332,100
Bennett Robert R BO Ascent Capital ASCMA JS*,S $4,832,603

Source: | Key to Insider Title and Trans Type Codes