 NEW YORK--BUSINESS WIRE--Halper Sadeh LLP, a global investor rights law firm, is investigating whether the sale of PRGX Global, Inc. NASDAQ: PRGX to Ardian for 7.71 per share is fair to PRGX shareholders. Halper Sadeh encourages PRGX shareholders to click here to learn more about their legal rights and options or contact Daniel Sadeh or Zachary Halper at 212 763-0060 or or The investigation concerns whether PRGX and its board of directors vi 