UK investment firm Gresham House Holdings Limited is acquiring Switzerland-based SUSI Partners AG, an energy transition infrastructure manager, for an undisclosed amount, according to an announcement on Friday.
The transaction is subject to customary closing conditions, including regulatory approvals.
SUSI CEO Marco van Daele will lead the combined Energy Transition division. The deal combines Gresham House’s UK leadership in battery energy storage with SUSI’s equity and credit expertise in global energy transition infrastructure.
The acquisition expands Gresham House’s footprint into continental Europe and Southeast Asia, supporting its international growth ambitions.
Clients will gain access to a broader suite of strategies across equity, credit, co-investment and tailored solutions. With £2.7 billion (€3.1 billion) in assets under management, the combined Energy Transition business will rank among Europe’s top 10 energy transition asset managers by AUM.
Upon completion, all SUSI employees will join Gresham House. Van Daele will lead the new division, with Ben Guest continuing to head the UK Energy Transition team and drive storage growth.
SUSI’s portfolio management leads will continue overseeing current and follow-on products across equity, credit and Asia strategies.
Founded in 2009, SUSI Partners last year closed its first Asia-focused vehicle, SUSI Asia Energy Transition Fund (SAETF), at an enlarged $259 million. The fund, which is about 80% committed, prioritises energy infrastructure development in Southeast Asia, focusing on Indonesia, Thailand, Vietnam, and the Philippines.
SAETF’s limited partners include the Asian Infrastructure Investment Bank, British International Investment (BII), Dutch development bank FMO, and Nordic institutions Norfund and Swedfund. BII and FMO are also co-investors in SAETF’s Sustainable Asia Renewable Assets (SARA) platform.
The firm’s investments include Asia Clean Capital Vietnam, a developer and operator of rooftop and ground-mounted solar projects for commercial and industrial users in Vietnam.
