The following statement is being issued by Levi & Korsinsky, LLP: To: All Persons or Entities who purchased OM Group Inc. stock prior to June 1, 2015. You are hereby notified that Levi & Korsinsky, LLP has commenced an investigation into the fairness of the sale of OM Group Inc. (NYSE:OMG) to funds managed by Apollo Global Management, LLC (NYSE:APO) for $34.00 per share in cash. To learn more about the investigation and your rights, go to: HTTP://ZLK.9NL.COM/OM-GROUP-OMG or contact Joseph E. Levi, Esq. either via email at email@example.com or by telephone at (212) 363-7500, toll-free: (877) 363-5972. There is no cost or obligation to you. Levi & Korsinsky is a national firm with offices in New York, New Jersey, Connecticut and Washington D.C. The firm's attorneys have extensive expertise in prosecuting securities litigation involving financial fraud, representing investors throughout the nation in securities lawsuits and have recovered hundreds of millions of dollars for aggrieved shareholders. For more information, please feel free to contact any of the attorneys listed below. Attorney advertising. Prior results do not guarantee similar outcomes.