 SUNNYVALE, Calif., Sept. 08, 2021 GLOBE NEWSWIRE -- Proofpoint, Inc. Proofpoint, a leading cybersecurity and compliance company, today announced that the acquisition by Thoma Bravo, a leading software investment firm, of Proofpoint constitutes a fundamental change and a make-whole fundamental change under the indenture the Indenture governing Proofpoints 0.25 convertible senior notes due 2024 the Notes. Thoma Bravos acquisition of Proofpoint was completed on August 31, 2021, which is the effective date of the fundamental change and make-whole fundamental change. 