SolarWinds Inc. to Join S&P MidCap 400; HealthStream Inc. to Join the S&PSmallCap 600 
  NEW YORK, July 25, 2012 /PRNewswire via COMTEX/ -- S&P Dow Jones Indices will  make the following changes to the S&P MidCap 400 and S&P SmallCap 600 indices: 
  SolarWinds Inc. (SWI) will replace Gen-Probe Inc. (nasd:GPRO) in the S&P MidCap  400 index after the close of trading on Tuesday, July 31. S&P MidCap 400  constituent Hologix Inc. (nasd:HOLX) is acquiring Gen-Probe in a deal expected to  be completed on or about that date pending final approvals. 
  HealthStream Inc. (nasd:HSTM) will replace GeoResources (nasd:GEOI) in the S&PSmallCap 600 index after the close of trading on Tuesday, July 31. GeoResources  is being acquired by Halcon Resources (HK) in a deal expected to be completed  soon pending final approvals. 
  SolarWinds designs, develops, markets, sells, and supports enterprise information  technology infrastructure management software. Headquartered in Austin, TX, the  company will be added to the S&P MidCap 400 GICS (Global Industry Classification  Standard) Application Software Sub-Industry index. 
  HealthStream provides Internet-based learning and research solutions.  Headquartered in Nashville, TN, the company will be added to the S&P SmallCap 600  GICS Health Care Technology Sub-Industry index. 
  Following is a summary of the changes:  S&P MIDCAP 400 INDEX- July 31, 2012  COMPANYGICS ECONOMIC SECTORGICS SUB-INDUSTRY  ADDEDSolarWinds Information Technology Application Software  DELETEDGen-ProbeHealth CareHealth Care Equipment 
  S&P SMALLCAP 600 INDEX- July 31, 2012  COMPANYGICS ECONOMIC SECTOR GICS SUB-INDUSTRY  ADDEDHealthStream Health CareHealth Care Technology  DELETEDGeoResources EnergyOil & Gas Exploration & Production 
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  For more information: 
  Dave GuarinoCommunicationsS&P Dow Jones Indicesdave_guarino@spdji.com  212-438-1471 
  David BlitzerManaging Director and Chairman of the Index CommitteeS&P Dow Jones  Indicesdavid_blitzer@spdji.com 212-438-3907 
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