JANA Partners Email Format

Investment ManagementNew York, United States51-200 Employees

JANA Partners is a mid-sized activist investment firm focused on creating value for its investors and other stakeholders through shareholder engagement. Founded in 2001 by Barry Rosenstein, the firm is based in New York City and operates in the investment management industry. It seeks to influence corporate governance and strategic directions at companies to unlock value over time.

Among its recent developments, Rapid7, Inc. entered into a Nomination and Support Agreement with JANA Partners Management, LP in March 2026, illustrating the firm’s active engagement with public companies. The firm’s work centers on using shareholder influence to shape outcomes in publicly traded companies, with a focus on strategic and governance-related changes rather than financing alone.

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