Impax Asset Management

Ian Simm, the founder, serves as CEO and oversees the firm's strategic direction. The listed equities and private infrastructure teams operate with dedicated portfolio managers and investment committees, though Simm remains closely involved in product development and thematic positioning. The firm has not publicly disclosed a single CIO; investment authority sits with the heads of each strategy group under the executive committee.

Impax's private infrastructure team originates deals through a network of developers, project sponsors, and financial intermediaries across Europe and North America. The firm targets operating-stage renewable energy assets and energy-efficiency platforms, often acting as lead or co-lead investor. Impax also participates in auction processes run by utilities and independent power producers divesting non-core renewable portfolios.

Impax's primary focus is on listed equities and mature private infrastructure assets. The firm has not historically maintained a dedicated venture capital strategy of material scale. Its private infrastructure funds target operational renewable energy projects rather than early-stage technology companies, though the listed-equity strategies can include growth-stage companies within their public-markets portfolios.

Impax operates through two distinct business divisions: listed equities, which runs thematic funds including the flagship Impax Environmental Markets trust, and private infrastructure, which manages closed-end funds targeting renewable energy platforms. The two teams share a common sustainability research framework but maintain separate investment processes, client bases, and fee structures.