Marunouchi Innovation Partners is a growth-stage climate tech investment platform established as a joint venture led by Mitsubishi Corporation (90% stake) together with MUFG Bank and Pavilion Private Equity. The firm invests from a $744M fund in companies dedicated to decarbonization through the development of climate tech, providing both growth capital and strategic business support to portfolio companies globally.
62% of their portfolio is in Climate & Energy. Deal activity increased 33% year-over-year (4 deals in the last 12 months). Average disclosed round size is $161.4M (across 14 rounds with reported amounts).
Portfolio
11
Fund Size
$744M
Top Stage
Series C
Last 12 Mo
4
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
16 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Ubicquia | Series D | $106M | Feb 2026 |
| Ubicquia | Series D | $106M | Jan 2026 |
| FFervo | Series E | $462M | Dec 2025 |
 Fabric8 | Series C | $50M | Nov 2025 |
 Fabric8Labs | Seed | $50M | Nov 2025 |
 HIVED | Series B | — | Jul 2025 |
 Mainspring Energy, Inc. | Series F | $258M | Apr 2025 |
 Gridpoint | Growth | $45M | Mar 2025 |
 Fervo Energy | Bridge | $462M | Jan 2025 |
| Fervo Energy | Series C | — | Feb 2024 |
| DDevon Energy | Series C | $244M | Jan 2024 |
| Mainspring Energy, Inc. | Series E | $150M | Sep 2022 |
| Fervo Energy | Series E | $138M | Jan 2022 |
 Omnidian | Growth | $87M | — |
| Gridpoint | Growth | $45M | — |
 Amogy | Unknown | $56M | — |
Top Co-Investors
DCVC7 shared
B Capital5 shared
Impact Science Ventures5 shared
Breakthrough Energy Ventures5 shared
Mitsubishi Heavy Industries5 shared
Congruent Ventures5 shared
Elemental Impact4 shared
Sabanci Climate Ventures4 shared
Capricorn Investment Group4 shared
Liberty Mutual4 shared
Shell Ventures3 shared
Mitsui & Co3 shared
New Enterprise Associates2 shared
Intel Capital2 shared
SK hynix2 shared
TDK Ventures2 shared
Ericsson Ventures2 shared
Lam Capital2 shared
Masco Ventures2 shared
SE Ventures2 shared
Last updated: 20 October 2026