# Sublime Systems

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/sublime-systems

- Industry: Materials
- Headquarters: Somerville, US
- Website: www.sublime-systems.com
- Total disclosed funding: $40M
- Latest round: Series A (Jan 30, 2023)
- Investors on record: 4

## About

Based in Massachusetts, US, and founded in 2020, Sublime Systems, Inc operates as a sustainable low-carbon cement provider firm. The company was founded by Leah Ellis (CEO) and Yet-Ming Chiang (CSO). In January 2023, Sublime Systems, Inc. raised USD 40 million in series A funding led by Lowercarbon Capital, Energy Impact Partners, Siam Cement Group, and The Engine. In May 2025, Sublime Systems, Inc. raised USD 3 million in venture funding from new investor Suffolk Equity Partners. The company was a spin-out of MIT. The firm offers sustainable cement which is made by a breakthrough process that makes low-carbon cement perform like normal. It uses an electrifying cement production process that forgoes the kiln entirely. The cement will be available in metric tonnes in 2023. The company plans to complete construction of its first commercial factory in Holyoke, Massachusetts, and accelerate development of its full-scale cement production facility.

## Funding rounds

- Series A, Jan 30, 2023, $40M — Energy Impact Partners, Engine Ventures, Siam Cement Group, Lowercarbon Capital

## Investors

- Energy Impact Partners (https://capitalatlas.ai/funds/energy-impact-partners) — Series A
- Engine Ventures (https://capitalatlas.ai/funds/engine-ventures) — Series A
- Siam Cement Group — Series A
- Lowercarbon Capital (https://capitalatlas.ai/funds/lowercarbon-capital) — Series A