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Top Insider Trades 5/22/13: RH, AMBI, LULU, CYCC

|Includes:AMBI, CYCC, LULU, Restoration Hardware (RH)

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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 Wednesday, May 22, 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
Orbimed Advisors BO Ambit Biosciences AMBI JB*,B $5,421,873
Raspino Louis DIR Chesapeake Energy CHK B $525,466
Frost Phillip Md CEO,CB,BO Opko Health OPK B $514,081
Silver Point Capital BO Cooper Standard COSH B $318,388
Rombotis Spiro G PR,DIR Cyclacel Pharm CYCC JB* $300,000
Anderson Richard DIR Medtronic MDT B $251,134
Florance Andrew C DIR Walker & Dunlop WD B $237,493
Nelson Glen D DIR Cardiovascular Sys CSII B $189,359
Waterfield John DIR Smtc SMTX B $165,481
Shustek Michael V PR,CEO,DIR Vestin Rlty Mort VRTB JB* $145,787
Click to enlarge

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Friedman Gary G BO Restoration Hardware RH JS* $39,901,400
Wilson Dennis J DIR,BO Lululemon Athletica LULU AS $30,824,472
Alberini Carlos CEO,DIR,BO Restoration Hardware RH JS* $16,476,800
Foster Paul L CB,DIR,BO Western Refining WNR S $16,196,461
Hoffman Reid DIR,BO Linkedin LNKD AS $15,228,152
Russell John G PR,CEO,DIR Cms Energy CMS S $7,187,750
Empire Capital Mgt BO Keynote Systems KEYN S $4,659,512
Tredwell Daniel P DIR Trimas TRS S $4,092,000
Kerley Gregory D DIR Southwestern Energy SWN S $3,950,220
Comas Daniel L VP,CFO Danaher DHR S $3,514,060
Click to enlarge

Source: | Key to Insider Title and Trans Type Codes