Zürich, Switzerland, 8th October 2026 — UniSieve, the Zürich-based deep tech company developing high-precision membranes for industrial gas separation and carbon capture, today announced that it has raised USD 9 million in Series A funding. The round was led by the Orano Venture Fund, managed by Supernova Invest, alongside new and existing investors including Amadeus APEX Technology Fund, Founderful, Zürcher Kantonalbank and the Guenat Holding. The round brings UniSieve’s total funding to date to USD 25 million.
Reducing the energy footprint of a process at the heart of modern industrial infrastructure
Until now, turning these advanced materials into durable gas-separation membranes that can be manufactured reliably at industrial scale has remained a major challenge. This is the technological hurdle UniSieve has overcome.
Scaling deployment and expanding into new industrial applications
UniSieve has brought its novel class of hybrid membranes to pre-commercial maturity in two applications: olefins and point-source carbon capture. Both are backed by repeatable manufacturing, field-validated performance, and deployable systems.
The Series A funding will enable UniSieve to scale its technology in existing markets and expand into additional industrial applications, as the company moves from technological validation towards broader commercial deployment.
“A new age of separations: UniSieve’s high-precision membranes make it possible to replace energy-intensive thermal technology with compact and simple solutions. This enables clients to recover more of their products and control emissions while spending less. The fresh capital will allow us to focus on execution”,
said Samuel Hess, CEO of UniSieve AG.
“Sam and Elia have demonstrated a remarkable ability to turn a highly complex technological breakthrough into a solution addressing a major industrial challenge, showing strong capital discipline along the way. UniSieve illustrates exactly what we look for at Supernova Invest and the Orano Venture Fund : deep tech with the potential to improve industrial performance and impact large industrial value chains. We are proud to support the team as it enters its next phase of commercial and industrial scale-up,”
said Jonathan Grosskopf, Investment Director at Supernova Invest.
“We are reinvesting in UniSieve because we see a company on a clear path from proven technology to a meaningful commercial scale. The addressable market spans chemical processing, industrial gas separation and carbon capture, and UniSieve has moved methodically from pilot deployments to larger systems with paying customers. That trajectory, more than any single technical milestone, is what gives us conviction to back the team again as they expand into new industrial applications,”
said Wolfgang Neubert, General Partner, APEX Ventures.
Contact Information
Media Contact UniSieve: media@unisieve.com
About UniSieve AG
UniSieve AG is a Zürich-based deep tech company developing high-precision membrane solutions for industrial gas separation and carbon capture. Founded in 2018, the company combines advanced materials with scalable membrane manufacturing to help industrial customers improve resource efficiency, reduce energy use and control emissions.
About Supernova Invest
Supernova Invest is the leading deep tech Venture Capital firm in Europe and manages c.€800 million in assets. The current portfolio includes 80+ innovative and impact-driven companies that develop products and services leveraging breakthrough technologies in 4 transition-centric sectors: Cleantech, Digital, Industrial Technologies and Healthcare. For 20 years, Supernova Invest has been providing long-term capital, operating experience, and strategic support to back sustainable growth of tomorrow’s deep tech and industrial champions throughout the Venture Capital life cycle: seed, early, late and growth stages. Supernova Invest also gathers the entire deep tech value chain to support portfolio companies: corporates, research institutions and co-investors.
Supernova Invest is backed both by Amundi, the largest asset manager in Europe, and CEA, the most innovative public research organization in Europe.
About APEX Ventures
APEX Ventures is a European venture capital firm focusing on early-stage deep tech companies. The team acts as hands-on investors with a mission to support the most talented startup teams in building global market leaders. In early 2023, APEX Ventures launched the Amadeus APEX Technology Fund together with Amadeus Capital Partners to invest in sectors that include next-gen computing, artificial intelligence, autonomous systems, space, medical technologies, energy, and other emerging deep tech areas. The fund invests in Seed and Series A ventures with innovative technology and engineering based on significant scientific advances. www.apex.ventures
About Orano Venture Fund
PARIS, France — Managed by Supernova Invest, the Orano Venture Fund is a vehicle specifically designed to accelerate Europe’s sovereign, sustainable, and low-carbon industrial transition. The fund targets early-stage deeptech startups at the Seed and Series A stages, with an absolute priority given to high-potential innovators across France and Europe. Strategically, investments are concentrated around three core pillars: industrial performance and safety, advanced engineering and sustainable chemistry focused on innovative recycling and circular economy models. Beyond capital, the fund offers selected startups a unique growth catalyst by unlocking direct access to the Orano Group’s world-class industrial infrastructures, technical expertise, and corporate synergies.
Zürich, Switzerland, 8th October 2026 — UniSieve, the Zürich-based deep tech company developing high-precision membranes for industrial gas separation and carbon capture, today announced that it has raised USD 9 million in Series A funding. The round was led by the Orano Venture Fund, managed by Supernova Invest, alongside new and existing investors including Amadeus APEX Technology Fund, Founderful, Zürcher Kantonalbank and the Guenat Holding. The round brings UniSieve’s total funding to date to USD 25 million.
Reducing the energy footprint of a process at the heart of modern industrial infrastructure
Until now, turning these advanced materials into durable gas-separation membranes that can be manufactured reliably at industrial scale has remained a major challenge. This is the technological hurdle UniSieve has overcome.
Scaling deployment and expanding into new industrial applications
UniSieve has brought its novel class of hybrid membranes to pre-commercial maturity in two applications: olefins and point-source carbon capture. Both are backed by repeatable manufacturing, field-validated performance, and deployable systems.
The Series A funding will enable UniSieve to scale its technology in existing markets and expand into additional industrial applications, as the company moves from technological validation towards broader commercial deployment.
“A new age of separations: UniSieve’s high-precision membranes make it possible to replace energy-intensive thermal technology with compact and simple solutions. This enables clients to recover more of their products and control emissions while spending less. The fresh capital will allow us to focus on execution”,
said Samuel Hess, CEO of UniSieve AG.
“Sam and Elia have demonstrated a remarkable ability to turn a highly complex technological breakthrough into a solution addressing a major industrial challenge, showing strong capital discipline along the way. UniSieve illustrates exactly what we look for at Supernova Invest and the Orano Venture Fund : deep tech with the potential to improve industrial performance and impact large industrial value chains. We are proud to support the team as it enters its next phase of commercial and industrial scale-up,”
said Jonathan Grosskopf, Investment Director at Supernova Invest.
“We are reinvesting in UniSieve because we see a company on a clear path from proven technology to a meaningful commercial scale. The addressable market spans chemical processing, industrial gas separation and carbon capture, and UniSieve has moved methodically from pilot deployments to larger systems with paying customers. That trajectory, more than any single technical milestone, is what gives us conviction to back the team again as they expand into new industrial applications,”
said Wolfgang Neubert, General Partner, APEX Ventures.
Contact Information
Media Contact UniSieve: media@unisieve.com
About UniSieve AG
UniSieve AG is a Zürich-based deep tech company developing high-precision membrane solutions for industrial gas separation and carbon capture. Founded in 2018, the company combines advanced materials with scalable membrane manufacturing to help industrial customers improve resource efficiency, reduce energy use and control emissions.
About Supernova Invest
Supernova Invest is the leading deep tech Venture Capital firm in Europe and manages c.€800 million in assets. The current portfolio includes 80+ innovative and impact-driven companies that develop products and services leveraging breakthrough technologies in 4 transition-centric sectors: Cleantech, Digital, Industrial Technologies and Healthcare. For 20 years, Supernova Invest has been providing long-term capital, operating experience, and strategic support to back sustainable growth of tomorrow’s deep tech and industrial champions throughout the Venture Capital life cycle: seed, early, late and growth stages. Supernova Invest also gathers the entire deep tech value chain to support portfolio companies: corporates, research institutions and co-investors.
Supernova Invest is backed both by Amundi, the largest asset manager in Europe, and CEA, the most innovative public research organization in Europe.
About APEX Ventures
APEX Ventures is a European venture capital firm focusing on early-stage deep tech companies. The team acts as hands-on investors with a mission to support the most talented startup teams in building global market leaders. In early 2023, APEX Ventures launched the Amadeus APEX Technology Fund together with Amadeus Capital Partners to invest in sectors that include next-gen computing, artificial intelligence, autonomous systems, space, medical technologies, energy, and other emerging deep tech areas. The fund invests in Seed and Series A ventures with innovative technology and engineering based on significant scientific advances. www.apex.ventures
About Orano Venture Fund
PARIS, France — Managed by Supernova Invest, the Orano Venture Fund is a vehicle specifically designed to accelerate Europe’s sovereign, sustainable, and low-carbon industrial transition. The fund targets early-stage deeptech startups at the Seed and Series A stages, with an absolute priority given to high-potential innovators across France and Europe. Strategically, investments are concentrated around three core pillars: industrial performance and safety, advanced engineering and sustainable chemistry focused on innovative recycling and circular economy models. Beyond capital, the fund offers selected startups a unique growth catalyst by unlocking direct access to the Orano Group’s world-class industrial infrastructures, technical expertise, and corporate synergies.