AURELIUS to acquire FIAMM Energy Technology from Resonac

• Definitive agreement reached for the acquisition of FIAMM Energy Technology
• AURELIUS’ latest transaction involving a seller listed in Japan
• Northern Italy-based FIAMM has generated revenues of €377m in 2024

Milan/Luxembourg, August 1, 2025 – AURELIUS Private Equity Mid-Market Buyout has entered into a definitive agreement for the acquisition of Resonac Corporation’s FIAMM Energy Technology business. Resonac Corporation is a subsidiary of Resonac Holdings Corporation.

The company is a renowned manufacturer of energy storage solutions and advanced battery technologies, with revenues of €377m in 2024. It is a market leader in Italy and has established a strong position across Europe. Headquartered in Vicenza, Northern Italy, the business operates two sites with just over 1,000 employees, serving around 3,000 customers globally.

This acquisition will mark AURELIUS’ latest transaction with a counterparty listed in Japan.

AURELIUS sees untapped growth potential in FIAMM Energy Technology as an important player in the global energy transition: building on the business’ strong brand and strategic positioning in its core markets, AURELIUS’ dedicated in-house operations advisory team AURELIUS WaterRise will support the company with bespoke advice throughout its transformation. AURELIUS WaterRise aims to enhance production quality and product performance, with the intention of improving overall customer satisfaction. AURELIUS anticipates growth opportunities, among others, from infrastructure investments such as data centres. It will support the business in identifying new market potential, expanding its core business and strengthening its global footprint.

Tomomitsu Maoka, CEO of FIAMM Energy Technology, comments: “We are excited about our partnership with AURELIUS, an investor with an established track record of building and growing businesses. This partnership should provide us with the resources and support to accelerate growth and bring cutting-edge energy solutions to markets worldwide.”

Fabian Steger, Managing Director AURELIUS IV and V, says: “FIAMM Energy Technologies is highly suited to leverage AURELIUS’ core strengths: our teams are experienced in conducting complex buyouts and subsequently supporting management teams through bespoke advice along their transformation journeys. Given our expertise in industrials, FIAMM is a great fit for our portfolio, and we look forward to working with the team to drive the business’ growth.”

Massimo Vendramini, Managing Director AURELIUS Investment Advisory Milan, says: “I am very proud that the Milan team could play its part in getting this deal signed. I would like to thank our counterparts at Resonac and all our advisors for making it happen. Given the strength of its market position in Europe, and the momentum behind the energy transition worldwide, I believe FIAMM can look forward to a great future. I am confident that AURELIUS will play its part in supporting that future.”

The transaction is subject to customary closing conditions, including regulatory approvals. Closing is expected in Q4 2025.

AURELIUS was advised by DC Advisory (M&A), Advant NCTM (Legal), Haver & Mailänder (Legal), BCG (Commercial), EY (Financial), EY (Tax), ERM (EHS) and AON (Insurance).