Cambridge Heavy Industries
Cambridge Heavy Industries develops compact fusion machines in Cambridge, Massachusetts.
- Industry
- compact fusion
- Location
- Cambridge, MA
About
Cambridge Heavy Industries develops compact fusion machines. The company release, dated October 22, 2026 and datelined Cambridge, Mass., says it raised a $6.2 million seed led by Azolla Ventures, with Overlay, the Mass Clean Energy Center, Neta Foundation, the Rothrock family, and P3A. FinSMEs, dated October 23, 2026, reports the same round and calls the company Cambridge, MA-based. TechCrunch, dated October 13, 2026, calls it a startup in Cambridge, Massachusetts, and reports the same seed. TechCrunch writes MassCEC for the Mass Clean Energy Center. The three accounts agree on Cambridge, so this page stores it.
The release names CEO Dr. Yun Kai and co-founders Raffi Freeman, Professor Keith Nelson, and Dr. Steve Kooi, and says the company spun out of MIT's Nelson Lab. No founded year is stated, so none is stored. Those people do not have investor pages.
TechCrunch's story is timestamped 1:13 PM PDT on October 13, 2026, which is 20:13 UTC. That is the earliest report of the seed read here, so the seed date is 2026-10-13.
An SEC Form D filed on 2026-10-07 reports $7,159,998 sold. The industry on that filing is Other Technology, and the state is Massachusetts. The filing does not name a round type or the purchasers. This page does not combine that amount with the $6.2 million seed. The Form D remains a separate round.
Funding history
| Round | Date | Amount | Lead |
|---|---|---|---|
| Seed 2026 | 2026-10-13 | $6.2M | Azolla Ventures |
| Form D 2026 | 2026-10-07 | $7.16M |
Investors
- Azolla Ventures lead
- Overlay participant
- Mass Clean Energy Center participant
- Neta Foundation participant
- Rothrock family participant
- P3A participant
Sources
Last verified:
- https://techcrunch.com/2026/10/13/cambridge-heavy-industries-has-been-quietly-building-a-desktop-fusion-device/
Type: reputable publication. Accessed 2026-10-26.
TechCrunch, Tim De Chant, 1:13 PM PDT on October 13, 2026 (20:13 UTC). Calls the company a startup in Cambridge, Massachusetts. Says it recently raised a $6.2 million seed led by Azolla Ventures, with Overlay, Neta Foundation, P3A, MassCEC, and the Rothrock family. MassCEC is the same organization as the Mass Clean Energy Center. This is the earliest report of the seed read here. - https://www.globenewswire.com/news-release/2026/10/22/3386302/0/en/cambridge-heavy-industries-raises-6-2-million-seed-round-to-advance-its-modular-benchtop-scale-fusion-system-technology.html
Type: company announcement. Accessed 2026-10-26.
GlobeNewswire release, October 22, 2026, 08:00 ET. Source line: Cambridge Heavy Industries. Dateline CAMBRIDGE, Mass. Reports a $6.2 million seed led by Azolla Ventures, with Overlay, the Mass Clean Energy Center, Neta Foundation, the Rothrock family, and P3A. Describes compact fusion machines. Names CEO Dr. Yun Kai and co-founders Raffi Freeman, Professor Keith Nelson, and Dr. Steve Kooi, and says the company spun out of MIT's Nelson Lab. Does not state a founded year. - https://www.finsmes.com/2026/10/cambridge-heavy-industries-raises-6-2m-in-seed-funding.html
Type: reputable publication. Accessed 2026-10-26.
FinSMEs, October 23, 2026. Calls the company Cambridge, MA-based and reports the same $6.2 million seed, lead, and participants. - https://azollaventures.com/cambridge-heavy-industries-raises-6-2-million-seed-round-to-advance-its-modular-benchtop-scale-fusion-system-technology/
Type: official investor website. Accessed 2026-10-26.
Azolla Ventures post, October 22, 2026. Republishes the GlobeNewswire release. The Cambridge street address in the page footer is Azolla's contact address, not the company's, and is not published here. - https://www.sec.gov/Archives/edgar/data/2158083/000215808326000001/0002158083-26-000001-index.htm
Type: sec filing. Accessed 2026-10-12.
SEC Form D filed 2026-10-07 by Cambridge Heavy Industries Inc. Reports $7,159,998 of securities sold. It does not name investors or a round type. - https://buttondown.com/raisetrack/archive/raise-track-update-2026-10-08/
Type: other verified public source. Accessed 2026-10-12.
Raise Track Update for 2026-10-08, Section 3 (SEC Form D filings). Lists Cambridge Heavy Industries, state MASSACHUSETTS, industry Other Technology, amount raised $7,159,998.