Top 5 Sustainability Angel Investors in Ireland in September 2025

Last updated: Sep 2025 A list of 5 angel investors that invest in Sustainability startups based in Ireland. We rank investors based on the number of investments they made in Sustainability companies from Ireland. We update this investor list every month.

Top 5 Sustainability Angel Investors in Ireland in September 2025

Investor	Sustainability Ireland investments
Peter Murphy	1
Henry Bolger	1
Barry Downes	1
Maurice O’ Gorman	1
Gokhan Guner	1

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Investor list

Peter Murphy joined American Capital in January 2013. Peter was President and CEO of Astrodyne Corporation, a power solutions company, from 2005 to 2013. Prior to that, he was President and CEO of Parlex Corporation (PRLX:NASD) and President of Teledyne Electro-Mechanisms. Peter was Chairman of the IPC, the world’s largest electronicsstandards organization, from 2002 to 2005. Peter retired as a Captain in the United States Naval Reserves.Peter Murphy received his BS in Finance from Mt. St. Mary’s University. He was designated an aviator by the USN Aviation Command and is a graduate of the Stanford University Engineering Executive Program.

Investment focus

Battery, Automotive, Wind Energy
Seed
Ireland, United Kingdom

Portfolio highlights

Gazelle Wind Power — Modular, scalable, easier to deploy: Introducing Gazelle's unique dynamic mooring system, an evolutionary step-change in the design of floating platforms.
Breathe Battery Technologies — Breathe Battery Technologies is a research-led technology company developing advanced battery management algorithms

Henry Bolger

Investment focus

Water, Internet of Things, Water Purification
Funding Round
Ireland

Portfolio highlights

H2ozone — H2Ozone patented Technology completely eradicates all harmful bacteria and pathogens from all water sources. Our compact, energy-eﬃcient machines create and harness the natural phenomena of Ultra-Violet light and Ozone, plus Filtration, to produce an environmentally sustainable and chemical-free supply of the pure, clean, fresh water.AgriSafe™uses patented H2Ozone Technology to accurately control a naturally self-disinfecting supply of Pure Ozonated Water for: • Livestock and Hydroponic Cultures • Dairy and Veterinary FacilitiesRainSafe™ uses patented H2Ozone Technology to provide a chemical-free puriﬁcation solution for all water sources to independently veriﬁed drinking water standards.RainSafe™ oﬀers 24/7 365-day guaranteed pure drinking water solutions for: • Residential Premises • Commercial and Oﬃce Premises • Hospitality, Restaurants and Pubs • Nursing Home and Cleaning Services • Medical and Dental Practices • Schools, Colleges and Sports Halls … Anywhere that requires 24/7 365-day guaranteed pure drinking water.

Barry Downes is an experienced technology investor, entrepreneur and technologist with extensive domain experience in Artificial Intelligence, Security Technologies and Immersive Technologies. Barry is Managing Partner and Co-Founder of Sure Valley Ventures, which he founded in 2017. He is a software founder turned investor, having founded severaltechnology businesses throughout his career, including FeedHenry, a leader in mobile cloud technologies, which was sold to Red Hat/ IBM in 2014. Previously, Barry was CEO of the leading academic software research and futurist institute, the Walton Institute, which worked with many of the top Silicon Valley and European global software companies on advanced technology research and futurist projects. He is also an advisor to the European Commission’s European Innovation Council, which is focused on developing Europe’s next unicorns with an allocated budget of over €1 billion.Barry holds a BSc in Applied Computing from Waterford Institute of Technology, an MBA from Smurfit Business School, University College Dublin and executive qualifications from Henley Business School in the UK, Harvard Law School in Cambridge, Massachusetts and Haas School of Business at the University of California, Berkley, in Venture Capital. He is also a Certified Investment Fund Director (CIFD), awarded by the Institute of Banking (IOB) and is registered with the FCA.

Investment focus

Software, Artificial Intelligence, Information Technology
Seed, Series A, Series B
Ireland, United Kingdom

Portfolio highlights

Ambisense — Since 2014 Ambisense has been driving innovation within the environmental space. Their technology platform optimizes the delivery of environmental risk assessment on some of the world’s largest infrastructure projects across industrial, O&G and waste verticals. Ambilytics encompasses both IoT and ML solutions, combining information fromremotely deployed field devices with contextual data sources such as weather, satellite, geophysical and operational data to build machine learning models. These models identify the relationships, patterns, and drivers hidden within the data and allow our customers to forecast and predict the behaviour of targeted environmental pollutants.
RETìníZE — RETìníZE is an AR, VR, multi-screen installations, and software development.
Stylus — Stylus automates the assessment and feedback procedure in schools by using artificial intelligence.

Maurice O’ Gorman

Investment focus

Energy, CleanTech, Clean Energy
Seed
Ireland

Portfolio highlights

Fincovi — We Are Your Complete Asset Health Technology Partner Purpose-built autonomous drones perform at record-setting inspection speed to minimize downtime while

Venture Capital investor, Angel Investor, Deep-tech startups, Technology commercialization, AI, Big Data/Analytics, IoT, Med-tech, Mobility, Electronics and Telecom.