The SPARC tokamak: A critical next step towards commercial fusion (cambridge.org)

There's a commercial entity behind this, called Commonwealth Fusion [1] created by members of the MIT Plasma Science and Fusion Center (PSFC) [2], which looks like it has received $199MM in total funding to date via a Series A [3].

[1] https://cfs.energy/

[2] https://www.psfc.mit.edu/sparc/greenwald

[3] https://www.crunchbase.com/organization/commonwealth-fusion-...