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09 Dec 2025

Elvinger Hoss Prussen Advises PSG Equity on Sale of Hornetsecurity to Thoma Bravo‑Backed Proofpoint

"Elvinger Hoss Prussen advised PSG Equity on the sale of Hornetsecurity, a leading global provider of AI-powered M365 security, data protection, compliance and security awareness services, to Thoma Bravo‑backed Proofpoint."

Elvinger Hoss Prussen advised PSG Equity on the sale of Hornetsecurity to Thoma Bravo‑backed Proofpoint. The transaction involved the sale of Hornetsecurity, a leading global provider of AI-powered Microsoft 365 security, data protection, compliance and security awareness services, to Proofpoint, which is backed by Thoma Bravo. Elvinger Hoss Prussen represented PSG Equity with a team composed by: Partner Anna Hermelinski-Ayache; Senior Associates Mateusz Glowacki and Grégoire Bissa; and Associates Océane Bostelle and Gauthier Devriendt.
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