Insiders Trading VOCS, AMG, CAB, RHT

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 Monday, May 7, 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.

Supernus Pharmaceuticals (SUPN) Sheffery Michael B DIR 1,100,000 5,500,000
Universal Display (PANL) Discovery Capital Mgt BO 100,000 4,077,000
Cabelas (CAB) Mark Reuben DIR 30,000 1,091,100
Vocus (VOCS) Rudman Richard E CB,CEO,PR 60,000 959,400
Steel Excel (SXCL) Sph Group BO 27,082 760,349
Rait Financial Trust (RAS) Rima Senvest Mgt BO 130,864 574,361
Emerson Electric (EMR) Busch August A III DIR 10,100 497,929
Oneok Partners (OKS) Gibson John William CEO,DIR 7,000 394,472
Vocus (VOCS) Vintz Stephen A VP,CFO,SEC 15,000 239,850
Opko Health (OPK) Frost Phillip MD et al CEO,CB,BO 50,000 225,253
Source: Insider Insights
Magnachip Semiconductor (MX) Avenue Special Sit Fd DIR,BO 5,098,768 55,364,972
Affiliated Managers (AMG) Nutt William J DIR 183,767 19,865,150
Cerner (CERN) Illig Clifford W VCB,DIR 120,000 9,787,640
Red Hat (RHT) Peters Charles E Jr VP,CFO 70,154 4,164,160
Bankunited (BKU) Lefrak Richard S DIR 100,113 2,432,772
Logmein (LOGM) Benson Steven J DIR 60,000 1,975,039
Cerner (CERN) Patterson Neal L CB,CEO,PR 20,000 1,611,782
Thoratec (THOR) Burbach Gerhard F CEO,DIR 44,623 1,527,369
Motorcar Parts America (MPAA) Marks Mel DIR 200,000 1,400,000
Aspen Technology (AZPN) McArdle Joan C DIR 60,000 1,322,250
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.