NEW YORK--(BUSINESS WIRE)--Halper Sadeh LLC, an investor rights law firm, is investigating whether the sale of RAPT Therapeutics, Inc. (NASDAQ: RAPT) to GSK plc for $58.00 per share is fair to RAPT shareholders. Halper Sadeh encourages RAPT 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 sadeh@halpersadeh.com or zhalper@halpersadeh.com. The investigation concerns whether RAPT and its board of directors violated th ...