NEW YORK–(BUSINESS WIRE)–Halper Sadeh LLC, an investor rights law firm, is investigating the sale of Varonis Systems, Inc. (NASDAQ: VRNS) to Proofpoint, Inc. for $49.75 per share in cash.Halper Sadeh encourages Varonis shareholders to click here to learn more about their rights and options or contact Daniel Sadeh or Zachary Halper free of charge at (212) 763-0060 or sadeh@halpersadeh.com or zhalper@halpersadeh.com.The investigation concerns whether Varonis and its board of directors violated t