Uranium Corporate Genealogy: What Happened to Uranium One, Cogema, UUS & the Rest

60-second answer: Many well-known uranium companies no longer trade under their old names — they were acquired, taken private, or renamed. Uranium One was taken private and became a subsidiary of Russia's state nuclear group Rosatom in 2013. Uranium Participation Corporation was reorganized into the Sprott Physical Uranium Trust (SPUT) in 2021. Cogema became Areva and is now Orano. Fission Uranium was absorbed by Paladin Energy in late 2024. Below is a factual directory of where each name went, so you can stop chasing a ticker that no longer exists.

If you searched for a uranium stock and hit a dead quote page, you are not alone. Uranium has gone through waves of consolidation, and the sector's roster of names changes faster than most. This guide tracks the biggest reorganizations plainly — old name, what happened, and where the entity lives today.

Quick reference: the dead-ticker directory

Details and sourcing for each row follow below.

Uranium One: taken private, now inside Rosatom

Uranium One was a Toronto- and Johannesburg-listed producer with assets in Kazakhstan, the United States, and elsewhere, best known by the ticker UUU. Between 2009 and 2013, JSC Atomredmetzoloto (ARMZ) — a subsidiary of Russia's state nuclear corporation Rosatom — moved from a minority stake to full ownership. ARMZ acquired majority control in 2010 and bought out the remaining public shares in early 2013. Uranium One was delisted from the Toronto and Johannesburg exchanges later in 2013 and became a wholly owned, indirect subsidiary of Rosatom.

The transaction drew significant political attention in the United States, particularly around the CFIUS review of Uranium One's US assets. We note that context factually only: as a matter of corporate structure, Uranium One is today a private Rosatom subsidiary and is not a stock you can buy on public markets. If you are researching Kazakhstan-linked uranium exposure, the publicly traded national producer is a different company — see our Kazatomprom stock guide.

Uranium Participation Corp → Sprott Physical Uranium Trust (SPUT)

Uranium Participation Corporation (UPC), which traded on the TSX under the symbol U, was for years the main way public investors held physical uranium — it owned uranium oxide (U3O8) and uranium hexafluoride (UF6) rather than mining shares. In April 2021, Sprott Asset Management agreed to reorganize UPC into a new vehicle, and the transaction closed in July 2021.

The result is the Sprott Physical Uranium Trust, commonly called SPUT, which trades on the TSX as U.UN (Canadian dollars) and U.U (US dollars). Former UPC shareholders became SPUT unitholders. If your old UPC quote page is dead, this is why — the underlying pounds of uranium simply moved into a new, larger structure. SPUT's daily buying is now one of the most watched sources of physical demand; we track its holdings and premium/discount on the Sprott page and cover the mechanics in the SPUT deep dive.

Cogema → Areva → Orano

France's nuclear fuel-cycle champion has changed names twice, which is why searches for "Cogema stock" or "Areva stock" lead nowhere useful today.

• Cogema (Compagnie générale des matières nucléaires) was the historic French fuel-cycle company — mining, conversion, enrichment, and reprocessing.
• In 2001, Cogema was folded into a newly created group called Areva, alongside reactor-builder Framatome. Cogema's fuel-cycle operations later carried the name Areva NC.
• After heavy financial losses, Areva was restructured in 2017–2018. The fuel-cycle business was recapitalized with French state support and, in January 2018, renamed Orano. The reactor business was separated out and now trades under the Framatome name.

The practical takeaway: Orano is the modern successor to Cogema's fuel-cycle activities. It is majority French-state owned and not a freely traded stock in the way a Cameco is. For a publicly listed comparison of Western producers, our screener covers the names you can actually buy — see uranium stocks.

Fission Uranium → Paladin Energy (2024)

Fission Uranium Corp (TSX: FCU) was a Saskatchewan developer whose flagship asset is the Patterson Lake South (PLS) project in the Athabasca Basin. In 2024, Australia's Paladin Energy agreed to acquire Fission in an all-stock deal, and the acquisition completed in December 2024 by way of a court-approved plan of arrangement.

Fission shareholders received Paladin shares rather than cash, so the ticker FCU stopped trading and the asset now sits inside Paladin Energy (ASX/TSX: PDN), a producer with the Langer Heinrich mine in Namibia plus the Canadian development pipeline. If you held FCU, you likely hold PDN now.

Other recent consolidations

Uranium's up-cycle has driven a steady stream of mergers. A few worth knowing:

• Consolidated Uranium (TSXV: CUR) merged into IsoEnergy (TSX: ISO) in a share-for-share deal that completed in December 2023, combining IsoEnergy's high-grade Hurricane deposit in the Athabasca Basin with Consolidated Uranium's broader portfolio across the US, Canada, Australia, and Argentina.
• Broadly, the sector's pattern is producers and larger developers rolling up smaller explorers to gain resources, permits, or a foothold in a tier-one jurisdiction. A dead junior ticker often means it was absorbed rather than that it failed outright — always check for a plan-of-arrangement announcement before assuming a company simply vanished.

When a name disappears, the fastest way to find its successor is to look for the last press release on the old ticker: acquisitions and reorganizations are announced formally, and the notice names the acquirer and the share-exchange terms.

How to track what you actually own

If you are holding a legacy uranium position and are unsure what it became, three checks resolve most cases:

• Look up the last filing on the old ticker. A plan of arrangement, merger, or going-private notice names the successor and the exchange ratio.
• Match the underlying asset, not the name. The PLS project points you to Paladin; physical uranium pounds under UPC point you to SPUT.
• Confirm it still trades at all. Uranium One is private; Orano is state-controlled. Some names have no public equity to buy.

For the companies that do still trade, compare them side by side by resources, cost, and valuation on the uranium stocks dashboard, and use the physical uranium page if your interest is in owning the metal rather than the miners. Unfamiliar terms are defined in the glossary.

Frequently asked questions

What happened to Uranium One stock? Uranium One was taken private and delisted in 2013 after Russia's state nuclear group Rosatom, through its subsidiary ARMZ, acquired full ownership. It is now a Rosatom subsidiary and is not publicly traded.

Is Uranium Participation Corporation still around? No. UPC was reorganized into the Sprott Physical Uranium Trust (SPUT) in July 2021. Former UPC shareholders became SPUT unitholders, and the trust trades on the TSX as U.UN and U.U.

Are Cogema and Areva the same as Orano? Effectively, yes, for the fuel-cycle business. Cogema became part of Areva in 2001, and Areva's fuel-cycle operations were renamed Orano in 2018 after a state-backed restructuring. Areva's reactor business is now Framatome.

What happened to Fission Uranium (FCU)? Paladin Energy acquired Fission Uranium in an all-stock deal that completed in December 2024. The FCU ticker no longer trades, and Fission's Patterson Lake South project is now part of Paladin (PDN).

Why do so many uranium tickers disappear? The sector consolidates heavily during up-cycles, with producers and larger developers absorbing smaller companies. A dead ticker usually means an acquisition or merger — check the last filing on the old symbol to find the successor.

This article is for informational purposes only and is not investment advice. Always do your own research.