(don't)Waste WaterSubscribe
VC · WATER INVESTOR

Old College Capital

Old College Capital is a water-focused venture capital that has backed 2 water companies since 2011. (don't) Waste Water rates its water commitment Committed.

Committed
Water Commitment
Type
Venture Capital
Founded
2011
HQ
Edinburgh, United Kingdom
Stage
Seed - Series A
Median round
$2.7M
Portfolio
2 cos

Water Commitment Score

Tier
Committed
2 water companies · last deal 2025 · leads ~0% of rounds · High confidence
How this is scored ↗
as of Jun 2026 · no pay-to-rank

Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.

How they invest

Seed1
Series A2
Median round$2.7Mrange $740K - $18.5M · 3 disclosed

Portfolio · 2 water companies

SeaWarm
SeaWarm is a UK-based company that develops and supplies HotTwist, a patented, modular, non-met
$740KSeed · 2025
MiAlgae
MiAlgae deploys a proprietary heterotrophic microalgal fermentation platform that feeds on nutr
$18.5MSeries A · 2024

See the full portfolio in Leviathan →

Invests alongside

Equity Gap3x Scottish Enterprise3x SIS Ventures2x Ascension Ventures2x Rabo Ventures1x Ananke Ventures1xBlue Ocean Fund1x Clay Capital1x

Highlighted = profiled on (don't) Waste Water.