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Madison, WI, USA · Private · realtafusion.com
Compact magnetic mirror for industrial heat and power; UW–Madison spinout
Open roles
—
no public job board
Federal awards
—
none found
Last private raise
$36M
Form D · 2025-05-01
SEC filings
2
latest 2025-05-13
Coming up
PROJECT · HAMMIR MIRROR DEVICEConstruction start (target)
OM Station (former Oscar Mayer site), Madison, WI
ans.org →+ THESISPOLICYDOE adds helium to the Critical Material List
DOE added helium to its Critical Material List, citing semiconductors, natural-gas leak testing and quantum computing. Helium also cools fusion magnets and high-temperature gas reactors. Affects Fusion.
+ THESISFUNDING · HAMMIR MIRROR DEVICEState support: State of Wisconsin and City of Madison$55M
Announced · Up to $55M of investments and incentives for the Madison site
ans.org →+ THESISPROJECT · HAMMIR MIRROR DEVICERealta picks Madison's former Oscar Mayer site for its HQ and Hammir
OM Station (former Oscar Mayer site), Madison, WI
ans.org →+ THESISPublic $55MPrivate $0incl. $55M conditional or pending
Money behind this company's projects. Company-wide raises are listed but not counted in totals.
No public filings, raises or hiring trend to read yet.
Read from SEC 8-Ks (bankruptcy, default, delisting, restatement, impairment, restructuring), cash runway in annual reports, Form D raises and the 30-day hiring trend. A prompt to look closer, not a credit rating.
Sources: company job boards (daily), SEC EDGAR, USAspending.gov, and the reviewed technology spreadsheets. Public records only cover US entities, so foreign companies and private firms that don't file will show gaps.
No public job board on Greenhouse, Lever or Ashby, so hiring isn't tracked for this company yet.
Companies file a Form D within 15 days of selling shares privately. “Sold” is the amount raised so far in that offering; amended notices (D/A) update earlier ones.
| First sale | Notice | Offered | Sold |
|---|---|---|---|
| 2025-05-01 | D · filed 2025-05-13 | $36M | $36M |
| 2023-05-12 | D · filed 2023-05-26 | $9.0M | $9.0M |
No federal grants, contracts or loans found on USAspending.gov under this company's US entity name.
STEP 2/4 · AT RISK REBCO superconducting tapeHigh-temperature superconducting magnets use a rare-earth barium copper oxide layer.
STEP 3/3 · WATCH Copper-intensive technologiesMagnet coils and stabilizers; also every grid and transmission project.
No minerals, policies or partners linked yet. Add them in the review spreadsheet.
Only Form D notices on file (shown at left).