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maxwell+spark secures €9 Million investment in a Series B round led by Alantra’s Energy Transition Fund and Klima.

PRIVATESep 10, 2025

Amount Raised

€9 Million

Round Type

Series B

RotterdamManufacturingEnergyRenewable EnergyEnergy Storage

Investors

Alantra’s Energy Transition FundKlima

Description

maxwell+spark, a lithium-ion green tech company, has successfully closed its first Series B funding round. The company raised €9 million from lead investors Alantra’s Energy Transition Fund and Klima. The funds will support the company's growth and technological advancements in green technology. This investment marks a significant step in enhancing eco-friendly energy solutions.

Quick answer

maxwell+spark raised €9 Million in a Series B round, dated September 10, 2025. Investors: Alantra’s Energy Transition Fund and Klima. maxwell+spark is based in Rotterdam, South Holland, Netherlands.

How much did maxwell+spark raise?
maxwell+spark raised €9 Million in a Series B round on September 10, 2025.
Who invested in maxwell+spark?
Alantra’s Energy Transition Fund and Klima are named as investors in this round.
What does maxwell+spark do?
maxwell+spark is a lithium-ion green tech company focused on innovative solutions for energy storage.
Where is maxwell+spark based and how big is it?
maxwell+spark is based in Rotterdam, South Holland, Netherlands. Fundz records about 97 employees.
Who are the decision-makers at maxwell+spark?
Fundz holds 2 contacts at maxwell+spark. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Energy and Renewable Energy around the same time

Companies in the same sectors as maxwell+spark that raised within 45 days of this round, from Fundz verified event records.

  • Offgrid raised $15M (Series A) on September 2, 2025.
  • Energy Vault raised $299M (Funding Round) on August 9, 2025.
  • Electra Battery Materials Corporation raised $35M on October 22, 2025.
  • Largo raised $6M on October 22, 2025.
  • Electra Battery Materials Corporation raised $69M on October 22, 2025.
  • HotGreen Solutions raised $1.6M (Pre-Seed) on October 20, 2025.

Who to call at maxwell+spark, and when

A new round usually means maxwell+spark is about to hire and buy. The teams that reach out first get the meeting.

  • An alert the day maxwell+spark raises, hires an executive or expands, scored against what you sell
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Company Information

Company

maxwell+spark

Location

21 Schuttevaerweg

Rotterdam, South Holland, Netherlands

About

maxwell+spark is a lithium-ion green tech company focused on innovative solutions for energy storage. The company aims to contribute to the transition towards sustainable energy by developing advanced battery technologies. Their efforts are geared towards enhancing the efficiency and sustainability of lithium-ion batteries. Through its innovations, maxwell+spark seeks to play a pivotal role in the energy transition landscape.

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Funding Insights

What this usually means
Timeline to next round
Series B companies typically work for 15-20 months before raising new capital
Growth expectations
Series B companies are expected to scale rapidly and expand market reach

maxwell+spark raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.