MUUS is the home of the investment, philanthropic, and creative endeavors of Tiger 21 founder Michael Sonnenfeldt. We invest in a bolder, more sustainable future..
Employees: 1-10
Investment Stage: Series A
Portfolio 34
| Date | Name | Website | Total Raised | Location |
| 16.05.2025 | Team Wildf... | teamwildfire.com | - | Colombia, ... |
| 16.05.2025 | NuCurrentT... | nucurrent.com | $3.48M | United Sta... |
| 16.05.2025 | Ivy Energy | ivy-energy.com | - | United Sta... |
| 16.05.2025 | Panthalass... | panthalassa.com | $140M | United Sta... |
| 16.05.2025 | Aepnus Tec... | aepnus.com | $8M | United Sta... |
| 16.05.2025 | Rail Visio... | railvision.io | $10M | Israel, Ce... |
| 16.05.2025 | Rock Rabbi... | rockrabbit.ai | - | - |
| 16.05.2025 | NxLite | nxlite.com | $25.8M | United Sta... |
| 16.05.2025 | Amperon | amperon.co | $29M | United Sta... |
| 16.05.2025 | Harvest Th... | harvest-thermal.com | $14.6M | United Sta... |
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Mentions in press and media 8
| Date | Title | Description |
| 20.07.2026 | NxLite Secures $16.6M to Propel Energy-Efficient Coating Production | NxLite secured $13.1M Series A funding and a $3.5M debt facility. The $16.6M capital infusion fuels manufacturing expansion for energy-efficient, low-emissivity coatings. These air-stable materials reduce energy consumption in buildings, re... |
| 19.07.2026 | NxLite Raises $13.1 Million Series A And Secures $3.5 Million Debt Facility | NxLite has completed a $13.1 million Series A financing and secured a $3.5 million debt facility to expand manufacturing of its energy-efficient coatings for glass and polymer substrates. The Series A exceeded the company’s original $10 mil... |
| 16.07.2026 | NxLite Completes $13.1 Million Series A And $3.5 Million Debt Facility And Adds Erin Sawyer to Board | NxLite, the manufacturer of air-stable, energy-efficient coatings for glass and polymeric substrates, announced the final close of its Series A financing, a $3.5 million debt facility from RSF Social Finance, and the appointment of technolo... |
| 16.07.2026 | NxLite Closes $16.6M in Series A and Debt Facility | NxLite, Canton, MI-based manufacturer of air-stable coatings for glass and polymeric substrates, raised $13.1M in Series A funding, and $3.5M in debt facility from RSF Social Finance. The Series A was led by Crabtree Lane Alt, with new inve... |
| 16.10.2025 | NxLite Secures $9.2M to Revolutionize Energy Efficiency with Advanced Coatings | NxLite secured $9.2M in Series A funding. This accelerates deployment of its innovative, air-stable, low-emissivity coatings. These materials drastically cut heating and cooling costs in buildings. They boost efficiency in refrigeration. Th... |
| 15.10.2025 | NxLite: $9.2 Million Series A Raised To Advance Energy-Control Coatings | NxLite has raised $9.2 million in Series A funding, aimed at accelerating the deployment of its innovative energy-control coatings. This investment will also support the company’s efforts to expand operations at its Advanced Innovation &... |
| 16.03.2021 | Self-driving electric tractor startup Monarch raises $20m Series A funding | Autonomous tractors may seem like a futuristic idea. But if you want to sell one to a farmer, don’t call it a robot, says Monarch Tractor co-founder and CEO Praveen Penmetsa. “Five years ago we came up with a very futuristic-looking machine... |
| 16.03.2021 | BREAKING: Self-driving electric tractor startup Monarch raises $20m Series A funding | Autonomous tractors may seem like a futuristic idea. But if you want to sell one to a farmer, don’t call it a robot, says Monarch Tractor co-founder and CEO Praveen Penmetsa. “Five years ago we came up with a very futuristic-looking machine... |