Ad hoc announcement pursuant to Art. 53 LR

YVERDON-LES-BAINS, Switzerland, 21 July, 2025 – Following the publication of the invitation of the Annual General meeting (“AGM“) and the agenda as outlined in the ad hoc press release dated 30 June 2025, the general partner of the majority shareholder, SEF-LUX (Strategic Equity Fund – Renewable Energy, Luxembourg and AM Investment SCA SICAV RAIF – Global Growth, Sub-Fund, Luxembourg, collectively are in aggregate the main shareholder of LECLANCHE SA), informed LECLANCHE SA (SIX: LECN) of its intention to submit, as representative of SEF-LUX, a motion at the upcoming AGM and to propose that two additional new members for the board of directors of LECLANCHE SA (the “Board“) are elected in addition to the proposed three candidates as set forth in agenda item 4 of the AGM invitation with the aim of strengthening its Board. The general partner, as representative of SEF-LUX, intends to propose to have the following two candidates elected by the shareholders to the Board at the upcoming AGM on 5 August 2025:

Jean-Michel Pacaud:  After a 36-year career, including 20 years as a partner, Jean-Michel Pacaud retired from EY Luxembourg in June 2022. He held several leadership roles at EY, notably as Business Development Leader (2011–2020) and Chairman of the board of directors (2018–2020). He also served as Chairman of the Institut des Réviseurs d’Entreprises (2012–2018).

Mr Pacaud currently serves as an independent board member of three Luxembourg-based financial institutions and sits on the board of directors of several commercial companies.

His areas of expertise include audit, international accounting standards, governance, regulatory and compliance matters, valuation, and mergers & acquisitions (M&A) transactions. In addition to his professional roles, he is the co-founder and CEO of a family real estate investment trust (REIT). He graduated from ESSEC Business School in France and is a chartered accountant in both France and Luxembourg. He holds dual French and Luxembourgish citizenship.

Raphaël Houillon: A board professional with over 13 years of experience in private equity, restructuring, and cross-border investments, Raphaël Houillon advises family groups and institutional investors on strategy, governance, and long-term value creation.

His sector experience spans real estate, banking, telecom, technology, and hospitality. Mr. Houillon has hands-on expertise in growth equity, special situations, and operational transformation. Known for his pragmatic, investor-driven mindset, he brings a strong focus on disciplined execution and sustainable growth to every role he undertakes.

Mr. Lex Bentner, Chairman of the Board said: “We are supportive of the intention of the majority shareholder, SEF-LUX, to submit a motion at the upcoming annual general meeting to propose to have Mr. Jean-Michel Pacaud and Mr. Raphaël Houillon elected to join Leclanché’s board of directors. Jean-Michel brings a wealth of experience in audit, governance, and strategic transactions, along with a distinguished track record in leadership roles at EY and other financial institutions. Raphaël complements this with deep expertise in private equity, operational transformation, and long-term value creation across a wide range of sectors. Their combined experience and strategic insight will be invaluable as we continue to strengthen our governance and position Leclanché for sustainable growth.”

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About Leclanché

Leclanché is a world leading provider of low-carbon footprint energy storage solutions based on lithium-ion cell technology. Established in 1909 in Yverdon-les-Bains, Switzerland, Leclanché’s history and heritage is rooted in battery and energy storage innovation. The company’s Swiss culture for precision and quality, together with its production facilities in Germany, make Leclanché the partner of choice for companies seeking the very best in battery performance and who are pioneering positive changes in how energy is produced, distributed and consumed around the world. Leclanché is organised into three business units: energy storage solutions, e-Mobility solutions and specialty battery systems. The company currently employs over 350 people with representative offices in eight countries around the world. Leclanché is listed on the Swiss Stock Exchange (SIX: LECN).

SIX Swiss Exchange : ticker symbol LECN | ISIN CH 011 030 311 9

Disclaimer

This press release contains certain forward-looking statements relating to Leclanché’s business, which can be identified by terminology such as “strategic”, “proposes”, “to introduce”, “will”, “planned”, “expected”, “commitment”, “expects”, “set”, “preparing”, “plans”, “estimates”, “aims”, “would”, “potential”, “awaiting”, “estimated”, “proposal”, or similar expressions, or by expressed or implied discussions regarding the ramp up of Leclanché’s production capacity, potential applications for existing products, or regarding potential future revenues from any such products, or potential future sales or earnings of Leclanché or any of its business units. You should not place undue reliance on these statements. Such forward-looking statements reflect the current views of Leclanché regarding future events, and involve known and unknown risks, uncertainties and other factors that may cause actual results to be materially different from any future results, performance or achievements expressed or implied by such statements. There can be no guarantee that Leclanché’s products will achieve any particular revenue levels. Nor can there be any guarantee that Leclanché, or any of the business units, will achieve any particular financial results.

Media contacts:

Switzerland / Europe: 

Thierry Meyer

T: +41 (0) 79 785 35 81

E-Mail: tme@dynamicsgroup.ch

Germany:

Christoph Miller

T: +49 (0) 711 947 670

E-Mail: leclanche@sympra.de

Investor contacts:

Hubert Angleys / Pierre Blanc

T: +41 (0) 24 424 65 00

E-Mail: invest.leclanche@leclanche.com