By Jonathan Moreland, founder of InsiderInsights.com and author of Profit From Legal Insider Trading.

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 Friday 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.
Winmark (WINA) Morgan John L CB,CEO,
DIR,BO
7,000 $175,280
Zep (ZEP) Morgan John K CB,CEO,
PR,DIR
10,000 $169,000
Monsanto (MON) Mcmillan Charles S DIR 2,000 $134,520
Bank Of South Carolina (BKSC) Lane Hugh C Jr CEO,PR,
DIR,BO
8,000 $83,994
Bank Of South Carolina (BKSC) Sharry Sheryl G CFO,DIR,
VP,TR
8,000 $83,994
Bank Of South Carolina (BKSC) Stevenson Thomas C III DIR 8,000 $83,994
Graymark Healthcare (GRMH) Dakil Samuel Edward Md DIR 75,000 $70,500
Blackrock (BLK) Bank Of America DIR 235 $47,856
Cytomedix (GTF) Jorden David Emerson DIR 32,310 $18,094
Kratos Defense Security (KTOS) Demarco Eric M CEO,PR,
DIR
1,030 $15,014
Source: www.InsiderInsights.com
Guess (GES) Marciano Maurice CB,DIR,
BO
577,500 $27,272,025
Google (GOOG) Page Lawrence PR,DIR,
SEC,BO
27,778 $16,309,194
Stone Energy (SGY) Comstock Resources Inc BO 520,000 $10,504,000
Guess (GES) Marciano Paul VCB,CEO,
BO
200,000 $9,462,000
Marvell Technology (MRVL) Sutardja Pantas DIR,VP,
CTO
400,000 $8,791,950
Kaiser Aluminum (KALU) Veba For Retirees Of Kaiser Aluminum BO 149,121 $5,979,047
Cardiome Pharma (CRME) Adage Capital Partners Gp LLC BO 650,000 $5,148,000
Patterson Companies (PDCO) Ezerski Ronald E DIR 100,000 $3,200,510
MKS Instruments (MKSI) Bertucci John R DIR 150,000 $3,146,250
Schnitzer Steel Industries (SCHN) Schnitzer Sandra BO 40,000 $2,300,017
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, 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.

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