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 mainly open-market insider purchases and sales filed at the Securities and Exchange Commission Wednesday, June 20, 2012 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.
Exco Resources (XCO) Ross Wilbur L Jr DIR,BO 1,300,000 8,906,695
ZBB Energy (ZBB) Marathon Capital Mgt BO 3,242,500 1,232,150
Opko Health (OPK) Frost Phillip MD et al CEO,CB,BO 77,500 344,855
Tri Continental (TY) King David L O 20,000 302,747
United Therapeutics (UTHR) Rothblatt Martine A CEO,DIR 3,960 189,887
Ares Commercial RE (ACRE) Cohen Bruce R PR,COO 10,000 175,582
Dollar Thrifty Automotive (DTG) Pentwater Capital Mgt BO 2,000 161,875
Arbor Realty Trust (ABR) Kaufman Ivan CB,CEO,PR,BO 30,000 151,803
Neogenomics (NGNM) Kinderhook BO 84,037 141,860
Cytrx (CYTR) Patterson Scott Bradford BO 21,114 94,730
Source: Insider Insights
Ulta Salon Cosmetics (ULTA) Eck Dennis K DIR 146,233 14,246,765
Western Refining (WNR) Foster Paul L CB,DIR,BO 300,000 6,234,140
Stericycle (SRCL) Miller Mark C CB,CEO,DIR 50,000 4,557,825
Raytheon (RTN) Peden Keith J VP 50,005 2,731,686
Western Refining (WNR) Franklin Mountain Investments BO 100,000 2,078,050
Validus Holdings (VR) Consolino Joseph E PR,CFO 59,866 1,863,049
Ventas (VTR) Pasquale Douglas M DIR 30,000 1,816,560
American Tower (AMT) Marshall Steven C VP,PR 14,272 984,768
UTI Worldwide (UTIW) Macfarlane Roger I DIR 50,000 763,955
Reald (RLD) Greer Joshua DIR 50,000 671,608
Source: Insider Insights

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.