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.
31% of their portfolio is in Climate & Energy. Deal activity increased 100% year-over-year (6 deals in the last 12 months). Average disclosed round size is $131.1M (across 12 rounds with reported amounts).
Portfolio
13
Fund Size
$744M
Top Stage
Growth
Last 12 Mo
6
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
13 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Ubicquia | Series D | $106M | Feb 2026 |
| UUbicquia, Inc | Series D | $106M | Jan 2026 |
| FFervo | Series E | $462M | Dec 2025 |
 Fabric8 | Series C | $50M | Nov 2025 |
| FFabric8Labs, Inc | Unknown | $50M | Nov 2025 |
| FFabric8Labs | Unknown | $50M | Nov 2025 |
 Hived | Series B | — | Jul 2025 |
 Mainspring | Series F | $258M | Apr 2025 |
| MMainspring Energy | Series F | $258M | Apr 2025 |
 GridPoint | Growth | $45M | Mar 2025 |
 Omnidian | Growth | $87M | — |
| GGridpoint | Growth | $45M | — |
| AAmogy | Unknown | $56M | — |
Top Co-Investors
Intel Capital3 shared
SK hynix3 shared
TDK Ventures3 shared
Ericsson Ventures3 shared
Lam Capital3 shared
Masco Ventures3 shared
SE Ventures3 shared
DCVC3 shared
Shell Ventures2 shared
Fortress Investment Group2 shared
The Goldman Sachs Group, Inc.2 shared
Hamilton Lane2 shared
ClearSky2 shared
Lightrock2 shared
General Catalyst2 shared
Gates Frontier2 shared
M&G Investments2 shared
Khosla Ventures2 shared
B Capital2 shared
Last updated: 8 September 2026