 NEW YORK--BUSINESS WIRE--Halper Sadeh LLP, a global investor rights law firm, is investigating whether the merger of Old National Bancorp NASDAQ: ONB and First Midwest Bancorp, Inc. is fair to Old National shareholders. First Midwest shareholders will receive Old National common stock in connection with the merger. Following completion of the transaction, former Old National stockholders are expected to own approximately 56 of the combined company. Halper Sadeh encourages Old National shar 