Europe’s tech sector just got a massive cash injection. Venture firm Series X Capital has closed a new $1.2 billion growth fund, marking one of the largest capital raises on the continent this year. The vehicle has a laser-focused mandate: backing late-stage startups that build the physical and digital infrastructure behind artificial intelligence and clean energy.
It’s a tough market for venture capital. Many firms are struggling to hit their fundraising targets, let alone break records. Yet, Series X managed to secure commitments from a mix of sovereign wealth funds, pension funds, and major industrial corporations. This shows a growing appetite for hard-tech investments that solve tangible, real-world problems.
Bridging the AI and Energy Gap
The timing isn’t accidental. The rapid rise of generative AI has triggered an unprecedented demand for data centers, processors, and, above all, electricity. AI models require massive computational power, which in turn strains existing power grids. Series X plans to invest right at this intersection.
“We can’t build the future of artificial intelligence on an energy grid designed in the last century,” says Thomas Lindqvist, co-founder and managing partner at Series X Capital. “The power footprint of AI is becoming the defining challenge of our generation. If we don’t solve the energy equation, the AI revolution will simply grind to a halt.”
About 60% of the new fund will target AI infrastructure. This doesn’t mean consumer apps or software-as-a-service platforms. Instead, Series X is looking under the hood. They want to back companies developing optical computing, energy-efficient silicon, advanced liquid cooling for data servers, and decentralized data centers.
Keeping European Talent at Home
The remaining 40% of the capital will go directly to climate-tech startups. Key areas include grid-scale battery storage, smart grid management software, and heavy industry decarbonization. There’s a clear strategic overlap here. The very technologies needed to decarbonize the grid are the ones that will keep tomorrow’s AI data centers running on clean energy.
Europe has always been excellent at research and early-stage innovation. But it has a scaling problem. For years, promising European startups have crossed the Atlantic to find the massive late-stage capital needed to grow. Series X wants to break that cycle.
“European founders are building world-class hardware, but they often hit a wall when they need $50 million or $100 million to scale up production,” says Elena Rostova, a partner at the firm. “They end up relocating to Silicon Valley or selling early. We want to give them the financial runway to build global giants right here in Europe.”
The fund plans to lead or co-lead investment rounds with ticket sizes ranging from $30 million to $100 million. It’s targeting companies at Series B and beyond, where technology is already proven but needs capital to scale commercial operations.
A Strategic Playbook in Action
Operating out of dual headquarters in London and Munich, Series X has already begun deploying the capital. The firm recently finalized its first two investments from the new vehicle, though the exact financial details remain undisclosed.
- CoolGrid: A Munich-based pioneer in direct-to-chip liquid cooling systems that cut data center energy use by up to 40%.
- OptiCore: A London-based startup designing silicon photonics chips that speed up data transfer between AI servers while using a fraction of the power of traditional copper connections.
These initial deals highlight the firm’s hands-on approach. Beyond capital, Series X connects its portfolio companies with major European industrial giants. These legacy businesses are desperate to modernize their operations and meet strict European Union carbon reduction mandates.
The regulatory environment in Europe acts as a powerful tailwind. Strict carbon taxes and the EU’s push for technological sovereignty are forcing legacy industries to adopt clean technologies and local AI solutions. By investing in these sectors now, Series X is betting that regulatory pressure will drive massive commercial adoption for its portfolio companies.
It’s a high-stakes gamble on the physical world. While software remains attractive, the real bottlenecks of the next decade are physical: power lines, cooling pipes, and silicon wafers. Series X Capital is betting $1.2 billion that the companies solving these hard problems will yield the biggest returns.
