MUUS Asset Management

MUUS Asset Management Co. is a private investment firm, allocating capital across public and private equity, real estate, and private debt. It strategically emphasizes venture capital and early-stage investments, particularly in climate technology, renewable energy, and clean tech. The firm provides financial capital and operational resources to portfolio management teams, adhering to a patient, long-term investment philosophy.

Established in 1998, MUUS Asset Management was founded by Michael W. Sonnenfeldt, also the founder of Tiger 21. Sonnenfeldt conceived the firm as the central platform for his investment, philanthropic, and creative endeavors. His insight leveraged decades of experience in private and public markets to build a disciplined, enduring investment practice.

The firm serves clients seeking sophisticated financial management and direct investment opportunities. It partners with and supports management teams, offering capital and strategic guidance for growth. MUUS Asset Management’s vision focuses on accelerating global decarbonization and cultivating a more sustainable economy through impactful environmental technology investments.