Nierenberg Investment Sells $1.9M Worth of Natus Medical

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 Thursday 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.

Boulder Growth Inc Fund (BIF) Ernest Horejsi Trust No 1b BO 84,005 $491,781 Futurefuel (FTFL) Knott David M BO 67,900 $437,955 Red Lion Hotels (RLH) Columbia Pacific Opp Fund LP BO 25,300 $128,785 Evolving Systems (EVOL) Singer Karen BO 20,000 $124,998 Dover Motorsports (DVD) Cibelli Mario BO 28,400 $64,783 Center Bancorp (CNBC) Kent Howard DIR 5,000 $42,500 Center Bancorp (CNBC) Seidman Lawrence B DIR,BO 3,700 $32,345 Bank Of South Carolina (BKSC) Lane Hugh C Jr CEO,PR, DIR,BO 3,255 $32,012 Inmedica Development (IMDD.OB) Conquest Ronald CB,CEO, DIR,BO 4,078,333 $30,587 Blackrock (BLK) Bank Of America Corp DIR 100 $23,810

Berkshire Hathaway (BRK.B) Bill Melinda Gates Foundation BO 2,200 $7,550,201 3par (PAR) Mayfield Ix O 450,000 $5,098,770 Unitrin (UTR) Singleton Group LLC BO 182,600 $4,153,932 Bioform Medical (BFRM) Bioasia Mangement LLC BO 750,900 $4,139,036 Tiffany (TIF) May Peter W DIR,BO 88,000 $3,971,167 Natus Medical (BABY) Nierenberg Investment Mgt BO 127,489 $1,860,288 Lumber Liquidators (LL) Sullivan Thomas D CB,DIR, BO 54,415 $1,361,126 Enernoc (ENOC) Dixon Gregg VP 34,847 $1,277,003 Markwest Energy LP (MWE) Fox John M DIR 37,500 $1,118,260 Advanced Energy Industries (AEIS) Schatz Douglas S Schatz Jill E Family Trust BO 63,355 $1,003,829

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.

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