 SUNNYVALE, Calif. and SAN FRANCISCO, Aug. 31, 2021 GLOBE NEWSWIRE -- Thoma Bravo, a leading software investment firm, and Proofpoint, Inc. Proofpoint, a leading cybersecurity and compliance company, today announced the completion of Thoma Bravos acquisition of Proofpoint for approximately 12.3 billion in cash. The acquisition was previously announced on April 26, 2021, and Proofpoints stockholders approved the transaction at the Special Meeting of Shareholders held on July 23, 2021. 