What are nuclear fuel & components?

Fuel assemblies, reactor vessels and heavy components, engineering, and spent-fuel storage. They are one segment of the nuclear & small reactors market.

Who are the leading nuclear fuel & components companies?

BWX Technologies (United States), Cameco (Canada), Westinghouse Electric Company (United States), X-energy (United States).

Which nuclear fuel & components companies are publicly traded?

BWX Technologies (BWXT), Cameco (CCO.TO / CCJ), X-energy (XE).

How big is the nuclear & small reactors market?

For the whole nuclear & small reactors market, not this segment alone: installed capacity (operable reactors, net) (world) 405,667 MWe (443 reactors), 2026 — World Nuclear Association.

Nuclear fuel & components

Fuel assemblies, reactor vessels and heavy components, engineering, and spent-fuel storage.

4 leading companies in nuclear fuel & components, one segment of nuclear & small reactors — SMRs, reactor restarts, new large builds and the uranium/enrichment fuel chain behind them

new market segment · researched 2026-11-14

Small modular reactors (SMRs)Large nuclear reactors Reactor restarts & life extensions Uranium mining Uranium enrichment & HALEUNuclear fuel & components

Leading nuclear fuel & components companies

4 companies, with the scale each source states. Scale is the whole company's unless the row says otherwise.

Company	Where	What they do	Scale
BWX Technologies BWXT ↗	Lynchburg, VA, United States since 1867	Naval and commercial reactor components, heavy nuclear components and nuclear fuel; Canadian operations	revenue: 3.198 USD billions (2025) ↗
Cameco CCO.TO / CCJ ↗	Saskatoon, Canada since 1988	Uranium miner (McArthur River/Key Lake, Cigar Lake), conversion and fuel services; 49% owner of Westinghouse	revenue: 3.482 CAD billions (2025) ↗
Westinghouse Electric Company ↗	Cranberry Township, PA, United States since 1999	AP1000 large reactor and AP300 SMR designer, fuel and services; partner in the US$80B US government deployment deal	employees: 11,000 employees (">11,000") (2026) ↗
X-energy XE ↗	Rockville, MD, United States since 2009	Xe-100 pebble-bed high-temperature gas reactor and TRISO fuel; 4x80 MWe Seadrift, Texas project with Dow	proposed capacity (Seadrift): 320 MWe gross (4x80) (2026) ↗

In Canada

2026-10Canada produced 24% of the world's mined uranium in 2024, second to Kazakhstan. Cameco's McArthur River/Key Lake (7,808 tU) and Cigar Lake (6,501 tU) were the world's two largest mines. ↗

The nuclear & small reactors market

The whole market this segment sits in.

installed capacity (operable reactors, net) · world405,667

MWe (443 reactors) · 2026

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Growth, segments, risks and every company in nuclear & small reactors →

Quick answers

What are nuclear fuel & components?: Fuel assemblies, reactor vessels and heavy components, engineering, and spent-fuel storage. They are one segment of the nuclear & small reactors market.
Who are the leading nuclear fuel & components companies?: BWX Technologies (United States), Cameco (Canada), Westinghouse Electric Company (United States), X-energy (United States).
Which nuclear fuel & components companies are publicly traded?: BWX Technologies (BWXT), Cameco (CCO.TO / CCJ), X-energy (XE).
Which Canadian companies are in nuclear fuel & components?: Cameco, Saskatoon.
How big is the nuclear & small reactors market?: For the whole nuclear & small reactors market, not this segment alone: installed capacity (operable reactors, net) (world) 405,667 MWe (443 reactors), 2026 — World Nuclear Association.