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Top Insider Trades 5/6/13: LOV, WPP, MCO, ECL

|Includes:ECL, Spark Networks, Inc (LOV), MCO, WPP

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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 Monday, May 6, 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
Starboard Value BO Wausau Paper WPP B $1,965,435
Osmium Partners BO Spark Networks LOV JB* $1,375,000
Grundhofer Jerry DIR Ecolab ECL B $499,892
Loewenbaum GW DIR Luminex LMNX B $421,566
Schaefer John H DIR Annaly Capital NLY B $379,000
Grant Kevin E CB,CEO,CIO Cys Inv CYS B $359,430
Okumus OV Fd BO Vocus VOCS B,JB* $323,871
Locke Stacy PR,CEO,DIR Pioneer Energy PES B $224,004
Justesen Jon L DIR Barrett Business BBSI B $209,880
Lee Daniel R DIR Myers Ind MYE B $205,676

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Berkshire Hathaway BO Moodys MCO S $84,501,728
Breyer James DIR Facebook FB AS $38,001,060
Gtcr Fund IX A DIR,BO Privatebancorp PVTB JS* $32,190,404
Schwab Charles R CB,DIR,BO Schwab Charles SCHW S $25,447,860
Thayer Equity BO Roadrunner Trans RRTS S $22,460,000
Cabela Richard N CB,DIR Cabelas CAB S $17,926,760
McCarthy Michael DIR Cabelas CAB S $13,351,388
Bhutani Ashish VCB,DIR Lazard LAZ S $8,316,636
Frazier Laura BO Brown Forman BFB S $4,283,455
Brandon David DIR Dominos Pizza DPZ S $3,980,050

Source: | Key to Insider Title and Trans Type Codes

Stocks: LOV, WPP, MCO, ECL