STEVENSON, Md.--(BUSINESS WIRE)--The securities litigation law firm of Brower Piven, A Professional Corporation, has commenced an investigation into possible breaches of fiduciary duty and other violations of state law by the Board of Directors of Kraft Foods Group, Inc. (“Kraft” or the “Company”) (Nasdaq: KRFT) relating to the proposed buyout of the Company by H. J. Heinz (“Heinz”). Under the terms of the transaction, Kraft shareholders will own a 49% stake in the combined company, and current