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Top Insider Trades 6/25/13: CHK, ZINC, PCRX, SNTA

|Includes: Chesapeake Energy Corporation (CHK), MDGL, PCRX, ZINCQ

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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, June 25, 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
Summit Midstream DIR,BO Summit Midstream SMLP JB* $97,985,720
Vulcan Ventures DIR Ptc Therapeutics PTCT JB* $4,999,995
Poses Frederic M DIR Chesapeake Energy CHK B $3,032,798
Dalal Street BO Horsehead Holding ZINC B $2,088,165
Simons Doyle R DIR Weyerhaeuser WY B $1,375,000
Kovner Bruce DIR,BO Synta Pharm SNTA B $1,097,440
RGM Capital BO Accelrys ACCL B $662,506
Coliseum Cap BO Accuride ACW B $508,232
Roath Robert S DIR Standard Parking STAN B $421,541
Schuster Todd CEO,DIR Ares Comml RE ACRE B $405,000

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Norcross Gary PR,COO,DIR Fidelity Natl Info FIS AS $4,932,789
Jones Clayton M CB,CEO,DIR Rockwell Collins COL AS $3,710,213
Hastings Reed CEO,DIR Netflix NFLX AS $3,245,694
Kusserow Paul B K VP Humana HUM S $2,894,893
Middleton Fred A DIR Pacira Pharm PCRX AS $2,211,044
Sook Perry A CEO,PR,DIR Nexstar NXST S $2,210,000
Adams Mark PR Micron Technology MU S $1,365,901
Shirley Brian VP Micron Technology MU S $1,269,829
Jones Brian VP,COO Nexstar NXST S $990,000
Cordano Michael D PR Western Digital WDC AS $737,211

Source: | Key to Insider Title and Trans Type Codes