Infinium Partners

www.infiniumpartners.com

Infinium invests across three critical sustainability theses—Energy Transition, Efficiency, and Mobility—deploying £250k-£20M in growth-stage companies and £25M-£500M+ in real assets platforms with bankable FOAK (First of A Kind) financing arrangements.

Check Size

$250K - $500M

Stages

Seed, Series A, Series B, Growth, Late Stage

Focus Areas

Climate Cleantech, Energy, Mobility Transportation

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Investment Thesis

Infinium operates as an entrepreneurial multi-strategy investor delivering impact through a venture studio model. They combine perpetual thesis-driven capital with hands-on operational expertise, providing deep support across growth equity and real assets to help founders achieve faster growth toward a cleaner, more profitable future. Their approach emphasizes both financial returns and sustainability outcomes, with all portfolio companies targeting a 30% improvement in a primary sustainability metric (such as carbon) agreed with the company board.

What Sets Them Apart

Venture studio model combining capital with operational support via proprietary STAX framework (Strategy, Team, Access, eXecution)
Flexibility in sustainability targeting—deliberately avoid SDR labeling to select assets with greatest flexibility rather than predetermined ESG criteria
Multi-stage investment capability across both early-stage growth equity and institutional-scale real assets platforms
Team of experienced operators: managing £5bn+ AUM with track record of scaling successful businesses and executed 5+ exits
First-of-A-Kind (FOAK) financing approach for infrastructure and real assets, backing platforms early with calculated risk
Access to enterprise clients for growth underwriting through established relationships