Ohmium
Founded 2019 · 571 employees on LinkedIn · 6 known investors
Find your way into Ohmium
Ohmium develops integrated outdoor green hydrogen electrolysis systems designed for rapid deployment across diverse climates and industrial applications. The company provides modular PEM electrolyzer units, engineering services, and remote monitoring for decarbonization projects globally.
Founders & leadership
Ohmium was founded in 2019 by Arne Ballantine.
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Investors · 6
Baruch Future VenturesSan Francisco · $100K – $1M
Energy Transition VenturesHouston · $100K – $5M
TPGreported · 2 sourcesSan Francisco
Also in the syndicate · 3
Fenice Investment GroupleadFlatrock CapitalleadTemasek Holdingslead
Funding
SEC filings, press & company announcements$250M disclosed across 1 of 4 rounds · 2023–2024
- Undisclosed amountSeries COct 2024
Fenice Investment Group (lead), Flatrock Capital (lead), Temasek Holdings (lead), TPG Rise Climate (lead)
Source ↗ - Undisclosed amountseries CMay 2023
TPG (lead)
Source ↗ - $250MraisedApr 2023 · 2 sourcesSource ↗
- Undisclosed amountSeries CApr 2023Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
In the news
Frequently asked questions
- What does Ohmium do?
- Ohmium develops integrated outdoor green hydrogen electrolysis systems designed for rapid deployment across diverse climates and industrial applications. The company provides modular PEM electrolyzer units, engineering services, and remote monitoring for decarbonization projects globally.
- Who founded Ohmium?
- Ohmium was founded by Arne Ballantine in 2019.
- Who are Ohmium's investors?
- Ohmium's investors include Baruch Future Ventures, Energy Transition Ventures, TPG.
- How much funding has Ohmium raised?
- Ohmium has disclosed $250M raised across 1 of its 4 known rounds.


