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Top Insider Trades 8/1/13: HNSN, IMH, AGNC, HTS

|Includes: AGNC, Hansen Medical, Inc. (HNSN), HTS, IMH

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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 Thursday, August 1, 2013 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
Glaxosmithkline BO Theravance THRX JB* $111,850,856
Hoffman Michael B DIR,BO Onconova ONTX JB* $15,000,000
Baxter Healthcare Sa BO Onconova ONTX JB* $4,950,000
Advent Venture BO Conatus Pharm CNAT JB* $2,090,594
Cooperative Gilde BO Conatus Pharm CNAT JB* $1,820,775
Mpm Bioventures BO Conatus Pharm CNAT JB* $1,817,915
Weinstein Will K DIR Hansen Medical HNSN JB* $1,069,885
Pickup Richard H BO Impac Mortgage IMH B $782,636
Kain Gary D PR,CIO American Capital AGNC B $561,000
Hough Michael R CEO,DIR Hatteras Financial HTS B $250,625

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Feinberg Stephen BO Tower Intl TOWR JS* $159,655,584
Tredwell Daniel P DIR Trimas TRS JS* $36,340,000
Ave Special Sit Fd DIR,BO Magnachip Semi MX JS*,S $33,485,296
Bell Leonard CEO,DIR Alexion Pharm ALXN AS $24,384,038
Plank Kevin A CEO,CB,BO Under Armour UA AS $19,864,098
Empire Capital Mgt BO Sonus Networks SONS S $10,921,519
Muse John R DIR Lin Tv TVL AS $9,461,324
Chabraja Nicholas D DIR General Dynamics GD S $4,427,783
Mastercard Fdn BO Mastercard MA S $3,965,351
Hagedorn Part BO Scotts Miracle Gro SMG S $3,927,075

Source: | Key to Insider Title and Trans Type Codes