A
- A. Schulman, Inc. (NASDAQ:SHLM)
- A.H. Belo Corporation (NYSE:AHC)
- A.P Pharma Inc (OTC:APPA)
- A.T. Cross Company (NASDAQ:ATX)
- A123 Systems (NASDAQ:AONE)
- AAR Corp. (NYSE:AIR)
- Aaron's Inc (NYSE:AAN)
- Aastrom Biosciences (NASDAQ:ASTM)
- Abaxis (NYSE:ABAX)
- ABB Ltd (NYSE:ABB)
- Abbott Laboratories (NYSE:ABT)
- Abbvie Inc (NYSE:ABBV)
- Abercrombie & Fitch Co. (NYSE:ANF)
- Abiomed Inc (NASDAQ:ABMD)
- AbitibiBowater Inc (NYSE:ABH)
- ABM Industries (NYSE:ABM)
- Abovenet (NYSE:ABVT)
- Abraxas Petroleum (NASDAQ:AXAS)
- Acacia Research (NASDAQ:ACTG)
- Acadia Healthcare Company (NASDAQ:ACHC)
- ACADIA Pharmaceuticals (NYSE:ACAD)
- Acadia Realty Trust (NYSE:AKR)
- Accelrys (NASDAQ:ACCL)
- Accenture Plc (NYSE:ACN)
- Access Midstream Partners (NYSE:ACMP)
- Access National (NASDAQ:ANCX)
- Acco Brands (NYSE:ACCO)
- Accretive Health (NYSE:AH)
- Accuray Inc (NASDAQ:ARAY)
- Accuride (NYSE:ACW)
- ACE Limited (NYSE:ACE)
- AcelRx Pharmaceuticals Inc (NASDAQ:ACRX)
- Achillion Pharmaceuticals (NASDAQ:ACHN)
- ACI Worldwide (NASDAQ:ACIW)
- Acme Packet (NASDAQ:APKT)
- Acorda Therapeutics Inc. (NASDAQ:ACOR)
- Acorn Energy (NASDAQ:ACFN)
- Acquity Group (AMEX:aq)
- Actavis Inc (NYSE:ACT)
- Active Network (NYSE:ACTV)
- Active Power (NASDAQ:ACPW)
- Activision Blizzard (NASDAQ:ATVI)
- Actuant Corporation (NYSE:ATU)
- Actuate Co. (NASDAQ:BIRT)
- Acuity Brands, Inc. (NYSE:AYI)
- Acura Pharmaceutical (NASDAQ:ACUR)
- Acxiom Corporation (NASDAQ:ACXM)
- ADA-ES Inc (NASDAQ:ADES)
- AdCare Health Systems (NYSE:ADK)
- Addus Homecare (NASDAQ:ADUS)