August 22, 2025: Fiamm Energy Technology, the Italian automotive and industrial lead battery business subsidiary of Japan’s Resonac, is to be sold to global private equity investor Aurelius.
Resonac CEO Hidehito Takahashi confirmed on August 1 that the company had entered into a definitive sale and purchase agreement with the special purpose vehicle Aurelius Investment Lux Sixteen.
Financial details of the deal were not disclosed.
Aurelius said it sees untapped growth potential in Fiamm as an important player in the global energy transition, building on the business’ strong brand and strategic positioning in its core markets.
Aurelius’ in-house operations advisory team, ‘WaterRise’, will support the company with bespoke advice throughout its transformation to boost production quality and product performance, the group said.
The sale is expected to close in the fourth quarter of this year, subject to various regulatory and other approvals.
Growth sectors for Fiamm include infrastructure investments such as datacentres, Aurelius said. The investment giant pledged to support the battery manufacturer in “identifying new market potential, expanding its core business and strengthening its global footprint”.
Tomomitsu Maoka, CEO of Fiamm, said the deal would provide the resources and support to accelerate growth and bring cutting-edge energy solutions to markets worldwide.
Fabian Steger, MD of Aurelius IV and V, said: “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.”
The MD of Aurelius Investment Advisory Milan, Massimo Vendramini, said: “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.”
Fiamm had revenues of €377 million in 2024. The business operates two sites with just over 1,000 employees.
Fiamm marked 80 years of business in the lead battery sector in December 2022. Batteries International reported in 2023 that Fiamm had manufactured its 100 millionth lead battery at its Veronella plant in Italy.
