Fast reactor vendor
TerraPower
- Design
- Natrium, 345 MWe sodium fast reactor with salt storage
- Ticker
- Private
- Licensing
- NRC rung 3 · Permit / approval
- Grade
- A A licensing; C/D fuel and deals
Kemmerer Unit 1 holds the first commercial non-LWR construction permit (Mar 9, 2026); no operating-license application yet. First-core HALEU depends on an ASP Isotopes plant in South Africa targeted for 2027.
- Design
- Xe-100, 80 MWe high-temperature gas reactor (TRISO pebble)
- Ticker
- Nasdaq: XE
- Licensing
- NRC rung 2 · Docketed
- Grade
- A A licensing; D IPO
Long Mott four-unit construction-permit application docketed May 12, 2025; mandatory hearing Sep 22, 2026, final safety evaluation targeted Nov 2026, decision pending. Its TRISO-X fuel plant is licensed but not operating.
Salt reactor vendor
Kairos Power
- Design
- KP-FHR, fluoride salt-cooled (TRISO pebble)
- Ticker
- Private
- Licensing
- NRC rung 3 · Permit / approval
- Grade
- A A licensing; C/D deals
Hermes and Hermes 2 hold non-power construction permits; a Hermes completion extension to Apr 30, 2029 has been requested. Hermes 2 output goes to TVA, with Google taking the attributes.
- Design
- Aurora, sodium fast reactor (metal HALEU fuel)
- Ticker
- NYSE: OKLO
- Licensing
- NRC rung 1 · Pre-application + non-NRC track
- Grade
- A A cash; C deals
No NRC application on file: the 2020 combined-license application was denied without prejudice Jan 6, 2022. Aurora-INL is on the DOE pilot track instead (PDSA approved Jun 11, 2026).
LWR SMR vendor
NuScale Power
- Design
- US460, 77 MWe light-water SMR modules
- Ticker
- NYSE: SMR
- Licensing
- NRC rung 3 · Permit / approval
- Grade
- A A licensing; C/D deals
US460 standard design approval issued May 29, 2025. No customer has a construction permit or combined license for a NuScale plant.
LWR SMR vendor
GE Vernova Hitachi
- Design
- BWRX-300, 300 MWe boiling-water SMR
- Ticker
- Parents: NYSE: GEV · TSE: 6501
- Licensing
- NRC rung 3 · Permit / approval + non-NRC track
- Grade
- A
Clinch River Unit 1 construction permit issued Sep 28, 2026 (TVA). Darlington Unit 1 in Ontario is under construction under a CNSC licence.
LWR SMR vendor
Holtec International
- Design
- SMR-300, 300 MWe-class PWR; Palisades restart owner
- Ticker
- Private (IPO withdrawn Sep 25, 2026)
- Licensing
- NRC rung 2 · Docketed
- Grade
- A
Palisades restart: fuel load began Aug 30, 2026, with no new grid date. Pioneer 1–2 (SMR-300): limited-work-authorization part docketed Feb 2026, Part 2 due by mid-2027.
- Design
- n/a
- Ticker
- Federal corporation
- Licensing
- NRC rung 3 · Permit / approval
- Grade
- A
Clinch River BWRX-300 construction permit issued Sep 28, 2026 on its early site permit; commercial operation now Dec 2033. Buys Hermes 2 output.
Owner/utility
Ontario Power Generation
- Design
- n/a
- Ticker
- Ontario Crown corporation
- Licensing
- Non-NRC track
- Grade
- B
Darlington BWRX-300 Unit 1 under a CNSC licence to construct; basemat placed Apr 2026, grid connection targeted for end-2030.
Owner/utility
Constellation
- Design
- n/a
- Ticker
- Nasdaq: CEG
- Licensing
- Existing fleet (no new-build rung)
- Grade
- A A/C
Crane (TMI-1) restart for Microsoft: NRC environmental assessment and FONSI published Sep 2026; restart approvals pending, target 2H 2027.
- Design
- n/a
- Ticker
- NYSE: VST
- Licensing
- Existing fleet (no new-build rung)
- Grade
- A A (8-K)
20-year PPAs with Meta for Perry and Davis-Besse output plus uprates including Beaver Valley (8-K). Also sells Comanche Peak output to Amazon.
- Design
- n/a
- Ticker
- Nasdaq: AMZN
- Licensing
- Buyer (no license of its own here)
- Grade
- C
Buys from operating reactors and holds X-energy equity. Its new-build ties are not binding offtake yet.
- Design
- n/a
- Ticker
- Nasdaq: GOOGL
- Licensing
- Buyer (no license of its own here)
- Grade
- C
Buys from operating, restarted and uprated reactors, and holds a Kairos master agreement whose only binding piece so far is Hermes 2.
- Design
- n/a
- Ticker
- Nasdaq: MSFT
- Licensing
- Buyer (no license of its own here)
- Grade
- C
Anchor buyer for the Crane (TMI-1) restart. Its Helion fusion PPA is tracked only as a comparator.
- Design
- n/a
- Ticker
- Nasdaq: META
- Licensing
- Buyer (no license of its own here)
- Grade
- A A (Vistra 8-K); C others
Binding PPAs with Vistra (8-K) and Constellation (Clinton). Its TerraPower and Oklo arrangements are non-binding.
- Design
- n/a
- Ticker
- NYSE American: LEU
- Licensing
- Fuel cycle (off the reactor ladder)
- Grade
- A A (8-K)
More than 1,900 kg of HALEU (as UF6) delivered under the DOE demonstration at Piketon, OH; new capacity targeted for 2029.
- Design
- n/a
- Ticker
- X-energy subsidiary
- Licensing
- Fuel facility license (off the reactor ladder)
- Grade
- A
NRC fuel-fabrication license SNM-7007 issued Feb 13, 2026; TX-1 vertical construction complete Sep 24, 2026. Not operating.
Data center developer
Fermi America
- Design
- n/a
- Ticker
- FRMI
- Licensing
- NRC rung 2 · Docketed
- Grade
- A A (FR); not deep-researched here
Matador 4×AP1000 combined-license application docketed in parts; the site-specific Part 3 was withdrawn, with resubmission targeted by Dec 31, 2026. Draft EIS issued Oct 9, 2026.