Insiders Trading GHDX, THLD, RVBD

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 Thursday, February 23, 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.

Autonation (AN) Cascade Investment Llc BO 592,600 $20,776,734
Genomic Health (GHDX) Baker Brothers Life Sciences Capital DIR,BO 114,518 $3,213,004
Geoeye (GEOY) Feinberg Stephen BO 127,800 $2,750,678
Opko Health (OPK) Frost Phillip Md CEO,CB
500,000 $2,362,395
Charming Shoppes (CHRS) Cooperman Leon G BO 291,900 $1,521,880
UMH Properties (UMH) Monmouth Real Estate Investment O 100,000 $1,000,000
Alnylam Pharmaceuticals (ALNY) Schimmel Paul DIR 93,023 $999,997
Gilead Sciences (GILD) Wold Olsen Per DIR 10,000 $439,955
Gannett (GCI) McFarland Duncan M DIR 15,000 $232,650
Ultralife (ULBI) Popielec Michael D PR,CEO
40,000 $191,706
Threshold Pharmaceuticals (THLD) Frazier Healthcare BO 13,737,243 $80,722,824
Medley Capital (MCC) Medley Opportunity Fund BO 3,897,244 $41,641,272
Riverbed Technology (RVBD) McCanne Steven CTO,DIR 247,019 $6,897,195
Equinix (EQIX) Ferris Peter SO 32,802 $4,378,522
HCA Holdings (HCA) Bank Of America BO 170,877 $4,357,500
Henry Schein (HSIC) Bergman Stanley M CB,CEO
42,000 $3,115,233
Equinix (EQIX) Smith Stephen M CEO,PR 21,486 $2,892,690
Enterprise Products Partners (EPD) Fowler W Randall VP,CFO
50,000 $2,594,000
Pool Corp (POOL) Sledd Robert C DIR 50,000 $1,868,000
Arch Capital (ACGL) Iordanou Constantine CB,PR
43,854 $1,647,755

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.