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Top Insider Trades 7/9/13: DVA, ACHN, ACCL, COSI

|Includes:ACCL, ACHN, COSI, DaVita HealthCare Partners Inc. (DVA)

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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 Tuesday, July 9, 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
Berkshire Hathaway BO Davita Healthcare DVA B $12,576,055
Qvt Assoc Gp BO Achillion Pharm ACHN B $4,036,300
RGM Capital BO Accelrys ACCL B $1,594,270
Charman John CB,CEO,DIR Endurance Specialty ENH B $258,060
Rcap BO Rcs Capital RCAP B $194,303
Miller Lloyd I Iii BO COSI COSI B $154,214
Walsh Stephen MD,CIO WAM Def Op Fd DMO B $87,460
Dr Bornstein BO Blue Sphere BLSP JB* $72,000
Butler John R Jr DIR Breitburn Energy BBEP B $24,867
Kolenick Patrick DIR Premier Alliance PIMO B $21,659

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Db Energy BO Diamondback Energy FANG JS* $18,423,094
Fpr Partners BO Viasat VSAT S $17,978,074
Av Partners VIII BO Homeaway AWAY S $17,456,616
Gulfport Energy DIR,BO Diamondback Energy FANG JS* $9,432,707
Henke David VP,OO Linkedin LNKD AS $3,363,240
Millard Robert B O Gulfmark Offshore GLF S $2,914,685
Nishar Dipchand VP Linkedin LNKD AS $2,176,501
Moglia Joseph H DIR Td Ameritrade AMTD S $1,840,849
Fromm Ronald A DIR Brown Shoe Co BWS S $1,739,125
Hung David PR,CEO,DIR Medivation MDVN AS $1,712,718

Source: | Key to Insider Title and Trans Type Codes