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Top Insider Trades 11/1/13: ACHN, CCXI, ACCL, WLT

|Includes:ACCL, Achillion Pharmaceuticals, Inc. (ACHN), CCXI, WLT

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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, November 1, 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
Srinivasan Mallika DIR AGCO AGCO AB $3,625,176
Ra Capital Mgt BO Achillion Pharm ACHN B $2,902,711
Bvf Partners LP BO Chemocentryx CCXI B $1,676,808
RGM Capital BO Accelrys ACCL B $1,111,992
Acp Iv BO Aerie Pharm AERI JB* $1,100,000
Baker Robert N DIR Cardinal Ethanol CRDE JB* $650,000
Marubeni DIR,BO Aircastle AYR B $568,710
Frost Phillip Md CEO,CB,BO Opko Health OPK B $345,598
Anido Vicente Jr CEO,DIR Aerie Pharm AERI JB* $280,000
Beatty David R DIR Walter Energy WLT B $168,700

Source: | Key to Insider Title and Trans Type Codes

Insider Sales
Filer Name Insider Titles Company Name Ticker Trans
Dollar Value
Gates William DIR Microsoft MSFT AS $142,506,400
Carlyle BO Commscope COMM JS* $109,326,912
Roche Collin E DIR,BO Privatebancorp PVTB JS* $49,000,000
Huntsman James PR Huntsman HUN S $6,924,840
Farrington Deborah DIR Netsuite N S $2,938,957
Drucker Charles CEO,DIR Vantiv VNTV AS $2,722,920
Miau Matthew DIR Synnex SNX S $2,460,587
Hawken Jeffrey C VP,COO Kilroy Realty KRC S $2,146,000
Thaler Warren S DIR Align Technology ALGN S $1,993,553
Stevens Michael J VP,CFO Whiting Petroleum WLL S $1,567,923

Source: | Key to Insider Title and Trans Type Codes