Muus Climate Partners
Family officeNew York · Series A–Series B · 16 people tracked
Find your way into Muus Climate Partners
1,476 people in our graph share verified history with the Muus Climate Partners team — schools, employers, funds. One of them is your warm intro.
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 directoriesWhat they invest in
from 5 of 6 portfolio companiesCleantech ×3Climate Tech ×3Energy ×3Advanced Manufacturing ×1Circular Economy ×1Consumer ×1Fintech ×1Hardware ×1
HQs:United States×4
Investments · 6 tracked
founders shown can be your intro pathBy year:2024 · 22023 · 13 dated
Aepnus 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
Lukas Hackl(Founder)in
Co-investorsClean Energy VenturesISVLOWERCARBONLowercarbon CapitalNextFab VenturesVoyager Partners+1 more
AmpUp develops electric vehicle charging infrastructure solutions for drivers, businesses, and communities.
Climate TechConsumerEnergyMobility & TransportationSaaSSan Francisco, US
Thomas Sun(Founder)in
Co-investors2.12 AngelsAutotech VenturesConnecticut InnovationsFoothill VenturesFrontier VenturesY Combinator+2 more
Dow Jones Reprints & Licensing provides authorized reprint and licensing options for Dow Jones copyrighted content, handled through its agent Wright's Media.
Media & Entertainment
Co-investorsCapitalG
Energetic Capital provides insurance and credit enhancement products for clean energy projects, using proprietary underwriting software and analytics to price project finance risk for developers, lenders, and other stakeholders.
CleantechClimate TechEnergyFintechInsurTechBoston, US
James Bowen(Executive Officer, Director, Promoter)inJeffrey McAulay(Executive Officer, Director, Promoter)
BoardJoshua Posamentier(Director)inWilliam Thorne(Director)
Co-investorsClocktower VenturesCongruent VenturesGreensoil PropTech VenturesMS&AD VenturesSE Ventures
Harvest Thermal makes an all-in-one home heating, cooling, and hot water system that pairs an air-to-water heat pump with an insulated thermal storage tank and optimization software to shift electricity use to cheaper, cleaner periods.
Advanced ManufacturingCleantechClimate TechEnergyHardwareKensington, US
JanePierreKen Munson(Executive Officer, Director)inElisabeth Jane Melia(Executive Officer, Director)
Co-investors37 AngelsAstiaClimate Impact CapitalCool Climate CollectiveEarth FoundryEnergy Foundry+4 more
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(Co-Founder and CEO)inChad D. Vecitis, PhD(Co-Founder and Chief Scientist)Desirée Plata, PhD(Co-founder & Science Advisor)Gabi Knesel(Executive Officer)
BoardRaffi Freeman(Executive Officer)inEdward Meir(Director)
Co-investorsAutodesk FoundationBroadscaleClean Energy VenturesVoLo Earth VenturesClean Energy VentureEquinor Ventures+1 more
Portfolio news
latest coverage across their companies
Harvest · circlevilleherald.com · Aug 27, 2026

Nth Cycle · wastedive.com · Aug 25, 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, CapitalG, among 5 tracked co-investors.
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