PE · WATER INVESTOR

Closed Loop Partners

Closed Loop Partners is a water-focused private equity that has backed 3 water companies since 2014. (don't) Waste Water rates its water commitment Committed.

Committed
Water Commitment
Type
Private Equity
AUM
$550M
Founded
2014
HQ
New York City, USA
Stage
Pre-Seed - Seed
Median round
$4M
Portfolio
3 cos

Water Commitment Score

Tier
Committed
3 water companies · last deal 2025 · leads ~50% 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

Pre-Seed1
Seed3
Median round$4Mrange $1.5M - $7M · 4 disclosed

Portfolio · 3 water companies

LAIIER
LAIIER makes ultra-thin adhesive sensor tapes fabricated with proprietary printed-capacitive el
$4MLED Seed · 2025
ChemFinity Technologies
ChemFinity Technologies develops advanced porous polymer network (PPN) sorbents and ion-capture
$7MSeed · 2025
Accelerated Filtration
Accelerated Filtration designs and supplies high-efficiency filtration systems that employ acce
$4MSeed · 2023

See the full portfolio in Leviathan →

Invests alongside

Oxcart Equity Partners2x Anthropocene Ventures2x Michigan Capital Network2x Bonaventure Capital1xMundi Ventures1xCarlisle Ventures1xVirta Ventures1xOne Small Planet1x Burnt Island Ventures1x

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