NEW YORK ( TheStreet) -- Which insiders are selling and buying chunks of stocks?

Below are lists of the top 10 open-market insider purchases and sales filed at the Securities and Exchange Commission Thursday, October 28, 2010 as ranked by dollar value. Company executives and directors are in the best position to assess the attractiveness of their firms' shares, and here is how many of them are voting their wallets! Please note, however, that these are factual lists, not buy and sell recommendations. Dollar value is only one metric to assess the importance of an insider transaction.

MSC Industrial Direct (MSM) Jacobson Mitchell DIR,BO 74,438 $4,331,759
Arch Capital Group Ltd (ACGL) Iordanou Constantine CB,PR
CEO,DIR
30,000 $2,595,081
Liquidity Services (LQDT) Mateus Tique Jaime DIR 75,000 $1,250,500
IPG Photonics Corp (IPGP) IP Fibre Devices BO 53,000 $1,165,049
Salesforce.Com (CRM) Benioff Marc CB,CEO
DIR,BO
10,000 $1,145,250
Parker Hannifin Corp (PH) Sherrard Roger S VP,PR 13,250 $1,006,189
BE Aerospace (BEAV) Lieberherr Werner VP 25,082 $906,213
Quest Software (QSFT) Smith Vincent C CB,DIR
BO
27,000 $703,260
Amcol International (ACO) Hughes John DIR 23,000 $660,414
Rand Logistics (RLOG) Knott David M BO 133,000 $649,040
Source: www.InsiderInsights.com

Key to Titles:A=Assistant, AI=Affiliated Investor, AO=Accounting Officer, BD=Business Development, BO=Beneficial Owner, CAO=Chief Accounting Officer, CB=Chairman, CCO=Chief Compliance Officer, CEO=Chief Executive Officer, CFO=Chief Financial Officer, CIO=Chief Information Officer, CO=Compliance Officer, COO=Chief Operating Officer, CT=Controller, CTO=Chief Technology Officer, DIR=Director, EVP=Executive Vice President, F=Founder, FO=Financial Officer, GC=General Counsel, HR=Human Resources, IO=Information Officer, IR=Investor Relations, LO=Legal Officer, MD=Managing Director, O=Officer, OO=Operating Officer, PR=President, PT=Partner, REL=Relative of an insider, SEC=Secretary, SH=Shareholder, SO=Sales Officer, TO=Technology Officer, TR=Treasurer, TT=Trustee, VCB=Vice Chairman, VP=Vice President, X=Ex Officer or other title displayed.

Jonathan Moreland is the founder of InsiderInsights.com, which produces a weekly newsletter and offers professional screening and alerting tools to analyze a proprietary, real-time insider data feed. He is also the principal of Insider Asset Management, a registered investment advisor in New York. Mr. Moreland has been analyzing insider data professionally for two decades and has been a contributor to TheStreet.com since 2001. A fundamental analyst with an MBA in finance, Mr. Moreland long ago identified insider data as an excellent first screen to determine where to focus his research efforts. He is quoted frequently in the media for his insider analysis and stock recommendations stemming from it. He is also author of Profit From Legal Insider Trading.

Under no circumstances does the information in this column represent a recommendation to buy or sell stocks. While he cannot provide investment advice or recommendations, Moreland appreciates your feedback; click here to send him an email.

More from Stocks

Stocks Slide, Dollar Rises as China Markets, Lira Crisis Keep Investors Cautious

Stocks Slide, Dollar Rises as China Markets, Lira Crisis Keep Investors Cautious

Tapestry CEO Talks Trade, Kate Spade Revival and Selena Gomez

Tapestry CEO Talks Trade, Kate Spade Revival and Selena Gomez

Rewind: Jim Cramer on Home Depot, Tapestry, Nordstrom and Square

Rewind: Jim Cramer on Home Depot, Tapestry, Nordstrom and Square

What to Expect From Nordstrom on Thursday

What to Expect From Nordstrom on Thursday

Stocks Post Solid Gains as Turkey Crisis Stabilizes

Stocks Post Solid Gains as Turkey Crisis Stabilizes