Susquehanna Sustainable Investments
Bala Cynwyd, Pennsylvania, United StatesFounded 2021
Susquehanna Sustainable Investments (SSI) is the venture investment arm funded by the owners of Susquehanna International Group (SIG). It provides patient capital to early-stage companies building environmentally friendly, market-based solutions across climate mitigation, adaptation, and removal.
33% of their portfolio is in Climate & Energy. They made 7 investments in the last 12 months. Average disclosed round size is $76.3M (across 12 rounds with reported amounts).
Portfolio
10
Fund Size
—
Top Stage
Series C
Last 12 Mo
7
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Portfolio
12 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| HHephae Energy Technology LLC | Unknown | $17.8M | Jul 2026 |
 Critical Energy Systems | Seed | $19M | Jun 2026 |
 Panthalassa | Series B | $140M | May 2026 |
 Zanskar | Series C | $115M | Jan 2026 |
 Zanskar | Series C | $115M | Jan 2026 |
 Zanskar | Series B | $115M | Jan 2026 |
 Zanskar | Series C | $115M | Jan 2026 |
| Panthalassa | Series B | $140M | Jan 2026 |
 Hephae | Series A | $17.8M | Jan 2026 |
 Foray Bioscience | Seed | $3M | — |
 Foray | Seed | $3M | — |
| Zanskar | Series C | $115M | — |
Top Co-Investors
Lowercarbon Capital7 shared
Union Square Ventures5 shared
University Growth Fund5 shared
Obvious Ventures5 shared
UP.Partners5 shared
StepStone Group5 shared
Spring Lane Capital5 shared
Safar Partners5 shared
Orion Industrial Ventures5 shared
Carica Sustainable Investments5 shared
Cross Creek5 shared
GVP Climate5 shared
Clearvision Ventures5 shared
GG13 shared
Superorganism2 shared
Engine Ventures2 shared
ReGen Ventures2 shared
Service Provider Capital2 shared
Understorey2 shared
Unless2 shared
Last updated: 20 October 2026