About This Fund
One Equity Partners IX, L.P. (OEP IX) is the ninth and largest flagship fund raised by One Equity Partners, a New York–headquartered middle market private equity firm founded in 2001 as the private equity arm of JPMorgan and spun out as an independent firm in 2015. OEP IX closed at its hard cap of $3.25 billion on September 2, 2025, exceeding its $2.75 billion target and representing the largest fund in the firm's 24-year history. The fund attracted limited partner commitments from more than 30 countries, including insurance companies, pension funds, asset managers, sovereign wealth funds, funds-of-funds, foundations, and family offices.
OEP IX pursues a value-oriented private equity strategy in the middle market, focusing on identifying and executing transformative business combinations that build market-leading companies in industrial, healthcare, and technology sectors across North America and Europe. One Equity Partners takes a systematic, thematic approach to sourcing and structuring transactions, targeting businesses with defensible competitive positions and opportunities for operational improvement and strategic acquisitions. The firm maintains offices in New York, Chicago, Frankfurt, and Amsterdam to support its transatlantic investment strategy, bringing local market knowledge to each geography.
One Equity Partners has completed over 400 transactions worldwide since its founding in 2001 and manages approximately $16 billion in combined assets under management following the OEP IX closing. The firm's track record spans healthcare, industrial, and technology investments in the $500 million to $3 billion enterprise value range. Kirkland & Ellis LLP served as legal counsel for OEP IX. The fund's successful close at its hard cap, combined with its expanded global investor base and record fund size, underscores institutional confidence in One Equity Partners' investment approach and the firm's positioning as a leading mid-market private equity firm.