MUUS Climate Partners is the climate technology venture capital arm of MUUS & Company, investing at the convergence of decarbonization and technological innovation. Founded in 2022, it backs early-stage climate tech startups across energy, mobility, agriculture, and industry.
55% of their portfolio is in Climate & Energy. Deal activity decreased year-over-year (1 deals in the last 12 months vs 2 prior). Their most common stage is seed (55% of deals). Average disclosed round size is $14.1M (across 9 rounds with reported amounts).
Portfolio
11
Fund Size
$50M
Top Stage
Seed
Last 12 Mo
1
Team
Kathleen Dunleavy
VICE PRESIDENT
Isaac Sonnenfeldt
ASSOCIATE
Chris Wolff
CHIEF INVESTMENT OFFICER
Kavita Patel
PORTFOLIO MANAGER, VENTURE
Dominique Pierro
ADMINISTRATIVE MANAGER
Mary Beth Bruggeman
PHILANTHROPIC ADVISOR
Michael W. Sonnenfeldt
FOUNDER AND CHAIRMAN
Tani Brown
HEAD OF PLATFORM
Wendy Gartenberg
CHIEF FINANCIAL OFFICER
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
Portfolio
| Company | Round | Amount | Date |
|---|---|---|---|
 Stardust Solutions | Unknown | $60M | Oct 2025 |
 InventWood | Series A | $15M | Apr 2025 |
 AmpUp | Series A | $15M | Sep 2024 |
| AAepnus | Seed | $8M | Jun 2024 |
 Aepnus Technology | Seed | $8M | Jun 2024 |
 Harvest Thermal | Unknown | $4M | Jan 2023 |
 Cache Energy | Seed | $8.5M | — |
 Niricson | Series A | — | — |
 RailVision | Seed | $4M | — |
 RailVision Analytics | Seed | $4M | — |
| RRailvision Ca | Seed | — | — |
Top Co-Investors
Last updated: 8 September 2026