Oxford, UK, 16 March 2026: 

Densix, an Oxford University spinout developing next-generation power conversion technology, today announced it has closed a $4m seed funding round led by Oxford Science Enterprises (OSE), with participation from Parkwalk Advisors and the University of Oxford Innovation Fund.

Densix is developing a new class of ultra-dense power converters designed to dramatically increase power density while improving thermal management and system efficiency. 

The company’s proprietary technology enables power converters with up to 8x smaller form factor than conventional solutions at comparable power levels.

Addressing a critical infrastructure bottleneck

As AI computing, electrified transport and renewable energy scale globally, power density is becoming a defining constraint in both digital and energy infrastructure. 

In particular, AI computing is driving the adoption of higher-voltage DC architectures for next-generation high-density compute racks. 

The compact form factor and unrivalled thermal management of Densix’s power conversion technology enable higher compute efficiency and lower cost of compute for data centre operators through:

• Higher compute density per rack
• Improved energy efficiency
• Reduced cooling burden
• Greater flexibility in system architecture

The same applies to the power grid, where a step-change in power density facilitates more flexible upgrading of power distribution within existing physical footprints in densely populated urban or space-constrained locations. This helps utilities and infrastructure operators avoid costly civil works and deliver more cost-effective acceleration of electrification.

The global data centre power supply unit (PSU) market alone is projected to reach approximately $6.5bn by 2031(1). With a growing team of experts, foundational IP and a commitment to pushing the boundaries of power density, Densix is well positioned to capitalize on rapid expansion in these global markets. 

Anders Hakfelt, CEO and Co-Founder of Densix, said: "Power density will be a defining constraint for the next generation of digital and energy infrastructure. At Densix, we are developing technologies to deliver dramatically higher performance within a smaller footprint. This funding marks an important milestone for the company and validates our vision to deliver industry-leading power-density solutions. The investment will enable us to accelerate product development, expand our team, and further strengthen our IP and technology platform. We look forward to working with partners across the data centre and power grid sectors to bring next-generation solutions to market.”

Unique technology with global markets, developed in Oxford

Born out of over six years of research from the University of Oxford’s department of Engineering Science led by Professor Dan Rogers, a patent pending technology for ultra-dense power conversion has been developed. The company was supported from the earliest stages by Oxford University Innovation (OUI), which worked with the founders to protect the intellectual property, leverage its Venture Scout programme to help build the leadership team and accelerate early investment momentum, and secure proof-of-concept funding through the University Challenge Seed Fund (UCSF).

Professor Dan Rogers, Chief Science Officer and Co-founder of Densix, said: “Conventional power conversion technologies are reaching the limits of their capabilities, particularly in high-density data centre and grid applications. Densix’s technology was developed to fundamentally rethink how higher power density is achieved without compromising efficiency or reliability. This creates new design freedoms for next-generation energy and digital infrastructure. I look forward to working with our fantastic engineering team to deliver a real step-change in power density and power converter performance.”

George Todd, Principal at Oxford Science Enterprises, said: “Densix addresses a critical bottleneck in global infrastructure. Its differentiated technology and clear commercial focus position the company to play a significant role in next-generation power systems – we are thrilled to lead this seed round and have high expectations for what the business can achieve.”

Alun Williams, Investment Director at Parkwalk, said: “Densix epitomises Parkwalk’s investment focus.  A hugely talented team applying fundamental science developed within a leading UK university to address a vast market need.  We are delighted to be joining Anders and the team on this exciting journey.”

Dr Andy Robertson, Deputy Head of Licensing and Ventures at Oxford University Innovation, said: “Densix is a great example of how we work with Oxford researchers from the first spark of an idea through to a fully formed company. We began working with the team in June 2023 to protect the intellectual property and begin to shape a clear commercial pathway. Through our Venture Scout programme and proof-of-concept funding from our University Challenge Seed Fund, we were able to support both the venture build and the development of the underlying technology. It’s exciting to see the Venture Scout programme delivering well-backed spinouts with global potential.”

About Densix

Densix creates and commercialises power converters with world-leading power density. Our mission is to shape the future of power electronics by delivering the most compact, power dense and efficient power converters.

Our unique technology enables more flexible power system designs and higher efficiency across a wide range of markets such as data centres, power grids, EV charging and renewable energy. Spun out of Oxford University, Densix’s technology is protected by a strong and growing IP portfolio.

About Oxford Science Enterprises

Oxford Science Enterprises (OSE) is an independent, billion-pound investment company that finds, funds and builds transformational science and technology companies emerging from Oxford’s world-leading research. Our portfolio of companies is focused across three high-impact sectors – Deep Tech, Life Sciences, and HealthTech – with the ambition of tackling some of the world’s greatest challenges. To date, OSE has collaborated with over 300 international investors, collectively investing more than £3bn in more than 125 companies. 

More information: oxfordscienceenterprises.com | LinkedIn

About Parkwalk 

Parkwalk is the UK’s most active investor in university spinouts, backing transformative technologies emerging from the country’s leading universities and research organisations. As a leading growth EIS fund manager with £450 million in assets under management, Parkwalk has invested in over 200 companies through its EIS funds, including managing early-stage innovation funds for the Universities of Cambridge, Oxford, Bristol and Imperial College.

Parkwalk invests in IP‑rich companies solving real‑world challenges across sectors such as deeptech, life sciences, artificial intelligence, quantum computing, advanced materials, cleantech, future mobility and medtech. By supporting breakthrough innovations from lab to market, Parkwalk helps scale the UK’s most promising deep‑tech businesses.

For more information, please visit: www.parkwalk.vc

About Oxford University Innovation

Oxford University Innovation (OUI) is the research commercialisation office of the University of Oxford, recognised worldwide for its ability to engage academic prowess through licensing, catalyse innovative solutions through consulting services, and support the creation of spinouts, start-ups, and social ventures. OUI is dedicated to showcasing these transformative technologies on the global stage, bridging the realms of academia and the commercial world, thereby weaving a future where knowledge, innovation and partnership drive forward solutions to global challenges. For more information, please visit https://innovation.ox.ac.uk/ 

1) AI server Power Supply Unit (PSU) Global Outlook and Forecast 2025-2031, Market Monitor