By Jonathan Moreland, founder of Insider Insights 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 Monday, Aug. 29, 2011 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.

Ecolab (ECL) Gates William H III BO 1,016,000 $50,415,036
Oasis Petroleum (OAS) SPO Advisory BO 242,740 $5,728,799
Air Transport Services (ATSG) Mesdag Willem BO 1,055,500 $5,522,271
Valhi (VHI) Simmons Harold C CB,DIR
10,500 $622,530
Zhongpin (HOGS) Zhu Xianfu CEO,CB
65,000 $524,900
Quinstreet (QNST) Solomon Glenn DIR 47,403 $491,379
Primo Water (PRMW) McQuilkin Malcolm DIR 100,000 $476,750
Zhongpin (HOGS) Ben Baoke VP,SEC
40,000 $323,400
International Rectifier (IRF) Decker Dwight W DIR 15,000 $316,050
Agree Realty (ADC) Rakolta John Jr DIR 10,000 $209,712
Higher One Holdings (ONE) Biddelman Paul DIR 250,000 $4,070,000
Waste Connections (WCN) Chambliss Darrell W COO 47,100 $1,601,626
Stryker Corp (SYK) Stryker Ronda E DIR 27,000 $1,265,018
HMS Holdings (HMSY) Holster Robert M DIR 41,300 $1,043,890
Virnetx Holding (VHC) O Brien Thomas M DIR 40,000 $888,602
Waste Connections (WCN) Mittelstaedt Ronald J CEO,DIR 23,750 $814,661
True Religion Apparel (TRLG) Harris Robert L II DIR 25,000 $721,525
Bottomline Technologies (EPAY) Eberle Robert A PR,CEO
26,570 $608,801
Bottomline Technologies (EPAY) Donovan Kevin M CFO 25,000 $562,423
Toll Brothers (TOL) Blank Robert S DIR 30,000 $460,977

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, 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 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.