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Top Insider Trades 2/8/13: KMX, AMSC, SFLY, NVR

|Includes:AMSC, CarMax Group (KMX), NVR, SFLY

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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 Friday, February 8, 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
Gangwal Rakesh DIR Carmax KMX B $1,182,900
Douglas Kevin BO Amer Superconductor AMSC B $811,405
Lanigan Bernard Jr DIR Texas Industries TXI B $553,446
Hall Terence E DIR Hancock Holding HBHC B $336,116
Frost Phillip MD CEO,CB,BO Opko Health OPK B $256,893
Listwin Donald J DIR Calix CALX B $200,238
Molnar Louis COO Rofin Sinar Tech RSTI JB* $150,400
Damelio Frank A DIR Zoetis ZTS JB* $130,000
Germano Geno J DIR Zoetis ZTS JB* $130,000
Giordano Douglas E DIR Zoetis ZTS JB* $130,000
Click to enlarge

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Housenbold Jeffrey T PR,CEO,DIR Shutterfly SFLY AS $7,428,233
Seremet Dennis M CFO NVR NVR S $4,472,916
Kellogg W K Fdn Tr BO Kellogg K AS $3,333,568
Richenhagen Martin CB,PR,CEO AGCO AGCO S $3,009,316
Orr R Douglas VP,CFO First Cash Finl FCFS S $2,752,739
Scherr Scott CB,PR,CEO Ultimate Software ULTI AS $2,351,175
Yeager David P CB,CEO,DIR Hub HUBG S $2,067,350
Tilghman Shirley M DIR Google GOOG S $1,957,108
Hsing Michael CEO,DIR Monolithic Power MPWR S $1,700,101
Cracchiolo James M CB,CEO,DIR Ameriprise Finl AMP S $1,509,745
Click to enlarge

Source: | Key to Insider Title and Trans Type Codes