Last Updated: 2 April 2025
IceMOS Technology, a semiconductor manufacturer based in Paradise Valley, Arizona, has raised $22 million in a Series E funding round. The investment was led by London-based firm 57 Stars LLC, with participation from existing U.S. investors. The round values IceMOS at a post-money valuation of $110 million.
The new capital will help scale the company’s manufacturing capabilities in Northern Ireland and bolster its global sales and engineering efforts ahead of the commercial launch of its proprietary mSJMOS™ platform, a next-generation silicon-based power semiconductor.
The mSJMOS™ technology, protected by over 70 patents, blends silicon MEMS manufacturing techniques with traditional CMOS super-junction power MOSFET structures.
The result is a new class of silicon-based devices that offer competitive performance at voltage levels ranging from 650V to 1200V—areas historically dominated by wideband gap materials.
The company is targeting sectors like AI, IoT, big data, renewable energy, electric vehicles, and aerospace, where efficiency and sustainability are key.
“Our sensing and power technologies are paving the way for more energy-efficient and CO2-saving solutions that support decarbonization. Products based on this advanced technology represents a new class of semiconductors, essential to serve the efficiency demands of the massively complex market segments like artificial intelligence (AI), internet of things (IoT), big data, renewables wind and solar, electric vehicles and aerospace applications. The merging of mSJMOSTM structures and MEMS manufacturing techniques presents a revolutionary silicon-based technology that can compete with wideband gap devices at 650 Volts, 750Volts, 900Volts, and 1200Volts.”
Dr. Samuel J. Anderson, MBE, Founder and Chairman, IceMOS Technology
The Series E funding will support hiring plans that aim to grow IceMOS' workforce to over 100 employees globally. This includes strengthening its footprint in Belfast, Northern Ireland, where it operates a key manufacturing center.
The company also announced the appointment of Niall Lyne as Chief Operating Officer and Executive Vice President of Global Sales. Lyne brings decades of industry experience from roles at Analog Devices, Intersil, and Renesas Electronics. He will lead operational strategy and revenue growth initiatives as IceMOS prepares for its next phase.
"IceMOS’ new architecture for silicon semiconductors represents break-through technology for power management systems in high-growth sectors such as electric vehicles and data centers. The hiring of industry veteran Niall Lyne both validates the strength and potential of its innovative products and enhances the management team to start scaling the business."
Bernard McGuire, Managing Director, 57 Stars LLC
Founded by Dr. Samuel J. Anderson, MBE, IceMOS has built a presence that spans North America, Europe, and Asia.
The company operates an advanced research and innovation center in Arizona, a design center in Tokyo, and its key manufacturing site in Northern Ireland.
Through its unwavering commitment to eco-friendly innovation and the expansion of technology access, Azimuth AI aspires to empower individuals and communities globally.
"IceMOS Technology’s multi-million funding success showcases the North’s strengths in advanced manufacturing and engineering. This investment highlights the confidence global investors have in the North and aligns with my vision to drive innovation, productivity, and technological advancement. The 2023 Investment Summit played a key role in showcasing the opportunities here and it’s encouraging to see significant outcomes like this. I look forward to seeing IceMOS continue to push the boundaries of semiconductor technology, creating high-value jobs in West Belfast and pioneering solutions in sectors from AI to renewable energy."
Dr. Caoimhe Archibald, Minister for the Economy
The company is a private, equity-financed semiconductor corporation developing energy-efficient power MOSFETs and sensing devices for markets where power efficiency is critical.
"Building on our 2024 ‘Made in the UK, Sold to the World’ award, this investment will further strengthen our manufacturing excellence in Belfast, expand our global workforce, and deepen our export footprint—already serving hundreds of customers worldwide. As a leader in advanced semiconductor exports, we are poised to diversify markets, enhance R&D, and deliver cutting-edge solutions that solidify the UK’s position as a hub for high-tech innovation. Together with our investors and partners, we’re not just scaling operations; we’re powering a sustainable future."
Hugh Griffin, CSO & Chief Strategy Officer, IceMOS Technology
The investment round was catalyzed in part by the 2023 Northern Ireland Investment Summit, which brought over 200 international investors to Belfast. The event, supported by the UK Department for Business and Trade, highlighted Northern Ireland’s capabilities in innovation and advanced manufacturing.
"Northern Ireland’s track record of delivering innovation, its supportive business environment, competitive operating costs and the creative ingenuity of its people make it an attractive destination for businesses of all sizes to start up and scale up. Northern Ireland has huge potential for significant economic growth, so it’s great to see IceMOS secure this funding as a result of the Northern Ireland Investment Summit, leading to investment and job creation."
Hilary Benn, Secretary of State for Northern Ireland
Lead investor 57 Stars committed $7.5 million to the round and was supported by EY, Tughans LLP, Purrington Moody Weil LLP, and SLR Consulting during the diligence process. IceMOS' strategic focus on sustainability and power efficiency aligns with 57 Stars' investment themes.
