Thoma Bravo executives agreed to 40 creditor-friendly changes in deal documents for Proofpoint, the cybersecurity software company, to secure a two-year extension on roughly $5 billion of debt originally tied to the company's acquisition.

The concessions included tighter limits on future borrowing and regular check-in calls with lenders. Major money managers including BlackRock Inc. and Invesco Ltd. used the negotiation to extract enhanced protections, reflecting their increased leverage in a market where software companies face heightened AI-disruption risk.

The Proofpoint refinancing follows Thoma Bravo's loss of control over Medallia, its customer experience software company, which it handed to lenders in a transaction that wiped out $5.1 billion in equity. Sophos, another Thoma Bravo software holding, also required a $2 billion refinancing from its lenders, indicating stress across the firm's portfolio.

The pattern demonstrates a structural rebalancing in private credit markets. Lenders have moved from accommodating sponsors to extracting enforceable protections—tighter covenants, mandatory reporting, borrowing caps—before committing capital to extensions. This shift reflects a recalibration of risk appetite in software and private equity financing.