Impax Small Cap Fund Investor Class (PXSCX) is a mutual fund offered by Impax Asset Management Group plc, focusing on small-cap equities with an emphasis on environmental, social, and governance (ESG) criteria. The fund invests primarily in common stocks of small-capitalization companies listed on U.S. exchanges that demonstrate sustainable business practices and positive environmental impact; it employs a bottom-up investment approach targeting sectors such as renewable energy, water management, waste reduction, and sustainable consumer products. Key holdings typically include niche leaders in ESG-aligned industries, with portfolio management balancing growth potential and risk through diversified sector exposure.
Established in 1971 as Pax World Funds and headquartered in Portsmouth, New Hampshire, the fund underwent a significant rebranding in 2018 when Pax World Management LLC merged with Impax Asset Management, adopting the Impax name to reflect expanded global capabilities while maintaining its U.S.-focused operations. The Investor Class shares (ticker: PXSCX) feature a minimum investment threshold suitable for retail investors, alongside institutional share classes; performance benchmarks against the Russell 2000 Index, with fees structured around a gross expense ratio supporting active ESG screening. Geographic operations center on U.S. domestic markets, serving individual investors, financial advisors, and retirement plans seeking responsible small-cap exposure.
Recent developments include Impax's strategic acquisition of Pax World in 2018, enhancing its U.S. platform with established ESG expertise; in 2023, the firm launched additional sustainable funds and expanded partnerships with institutional allocators amid growing demand for impact investing. No major name changes or reorganizations have occurred in the last 1-2 years; however, Impax has deepened alliances with data providers for advanced ESG analytics and reported asset growth in small-cap strategies through 2025. The fund continues to prioritize high-conviction positions in companies driving the energy transition and resource efficiency.