Muus Climate Partners
Family officeNew York · Series A–Series B · 16 people tracked
Investment thesis
MUUS Climate Partners channels the entrepreneurial, philanthropic, and cultural endeavors of Michael Sonnenfeldt and his family. Leveraging their network and resources, the firm invests in mission-aligned, sustainability-focused opportunities intended to deliver strong, risk-adjusted returns while contributing to a brighter, more sustainable future.
Source: firm website, verified Aug 7, 2026.
Team · 16 people
from the firm's website & public directories
What they invest in
from 2 of 3 portfolio companiesCircular Economy ×1Cleantech ×1Media & Entertainment ×1New Materials ×1
HQs:United States×1
Investments · 3 tracked
founders shown can be your intro pathAepnus is developing a sulfate recycling process that regenerates chemicals on-site from sodium sulfate waste, with a planned demonstration-scale plant designed to process over 500 tonnes of sodium sulfate annually.
Circular EconomyCleantechNew Materials
Co-investorsClean Energy VenturesISVLOWERCARBONLowercarbon CapitalVoyager PartnersIMPACT SCIENCE VENTURES
Dow Jones Reprints & Licensing provides authorized reprint and licensing options for Dow Jones copyrighted content, handled through its agent Wright's Media.
Media & Entertainment
Critical minerals midstream refining company building modular technology to convert industrial scrap, black mass and primary feeds into refined nickel, cobalt, copper and rare earth products for Western supply chains.
Burlington, US
Megan O'Connor(Executive Officer, Director)Gabi Knesel(Executive Officer)
BoardRaffi Freeman(Executive Officer)inEdward Meir(Director)Joseph Goodman(Director)inBrian Baynes(Director)in
Co-investorsAutodesk FoundationBroadscaleClean Energy VenturesVoLo Earth VenturesClean Energy VenturePillar VC
Portfolio news
latest coverage across their companies
Nth Cycle · miningweekly.com · Jul 22, 2026
Frequently asked questions
- What stage does Muus Climate Partners invest at?
- Muus Climate Partners invests at the Series A, Series B stages.
- What sectors does Muus Climate Partners focus on?
- Muus Climate Partners focuses on Cleantech, Climate Tech, Energy, Impact & Social Good, New Materials.
- Where is Muus Climate Partners located?
- Muus Climate Partners is headquartered in New York, US.
- Who does Muus Climate Partners co-invest with?
- Muus Climate Partners most often shares deals with Autodesk Foundation, Broadscale, Clean Energy Ventures, among 4 tracked co-investors.
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