Tuesday, 14 July 2026

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Master Battery becomes a public limited company and increases capital by 20 million

Master Battery completes its transformation to a public limited company and raises 20 million to boost expansion in defence, telecoms, and energy storage.

Beatriz Lorenzo AguirreBeatriz Lorenzo Aguirre· · 3 min read

The Spanish company Master Battery has completed its transformation from a limited liability company (S.L.) to a public limited company (S.A.) and has approved a capital increase of 20 million euros, fully subscribed by its founding partners.

The Spanish company Master Battery, specialised in batteries and energy storage solutions, has finalised its transformation from a Limited Liability Company (S.L.) to a Public Limited Company (S.A.). The change, unanimously approved at the Extraordinary and Universal General Meeting on June 11, is accompanied by a capital increase of 20 million euros, entirely taken on by the founding partners and current owners, with no entry of external investors or recourse to external financing.

The operation, as reported by the company based in Móstoles (Madrid), aims to strengthen the company's equity and align its own funds with its new dimension, following years of growth in strategic sectors such as defence, security, telecommunications, and electrical networks. Master Battery thus seeks to consolidate its financial structure to face the planned expansion.

A capital increase without external help

The capital increase, endowed with 20 million euros, has been fully subscribed by the founding partners and current owners of the company. This decision, according to company sources, reflects the confidence of the core group of shareholders in the business project and the opportunities offered by the energy storage market.

By not resorting to external funds or financing, Master Battery maintains its independence and avoids diluting the control of its founders. The new resources will be allocated to support expansion in sectors such as defence, security, telecommunications, electrical networks, data centres, electric mobility, and advanced energy storage systems, including BESS (Battery Energy Storage Systems).

New structure for large-scale projects

The corporate transformation does not imply changes in the company's activity or management, which retains its legal personality, corporate identity, and values. However, the new structure of Public Limited Company grants it greater flexibility to participate as a strategic partner in large energy and technology infrastructure projects, both in Spain and abroad.

In a context where batteries and energy storage are key to the energy transition and the development of critical infrastructures, Master Battery reinforces its capacity to provide technological solutions for large-scale projects. The company, founded in 2010, is expanding its facilities in Móstoles to launch a new factory integrated with Logistics and R&D areas, which will include rehabilitated green spaces and exhibition areas.

The company's management has thanked clients, suppliers, financial entities, and collaborators for their support, and has assured that they will continue to work with the same dedication.

“We will continue to work with the same dedication to promote our business project and successfully face the challenges and opportunities in the energy, technology, and industrial sectors”
, say those at Master Battery.

The capital increase and the change in legal form do not alter the commitments made with clients nor the company's strategy, which maintains its focus on creating sustainable value. For readers interested in the energy sector, this operation represents a sign of financial solidity and a commitment to growth in an increasingly competitive market.

Beatriz Lorenzo Aguirre

Written by

Beatriz Lorenzo Aguirre

Redactora

Periodismo económico por la Carlos III y lectora compulsiva de cuentas anuales. Cafés a destajo, alergia a las notas de prensa vacías y memoria para los ERE; en Iber Empresa escribe de empresas y empleo.