Paladin Energy (PDN) Stock — and What Happened to Fission Uranium

60-second answer: Paladin Energy (ASX: PDN, OTC: PALAF) is an Australian uranium producer whose flagship is the restarted Langer Heinrich mine in Namibia, one of the few conventional open-pit uranium operations brought back from care-and-maintenance in this cycle. In 2024 Paladin acquired Fission Uranium in an all-share deal, folding Fission's Patterson Lake South (PLS) project in Canada's Athabasca Basin into the company. So if you searched "Fission Uranium stock" and can't find it trading independently, that is why — Fission ceased to exist as a standalone listed company, and former Fission holders became Paladin shareholders. If you want the live Paladin picture, start with our uranium stock screener. US investors note: PDN trades on the ASX, so a direct buy usually needs an international broker (see our ASX uranium stocks guide).

Two very different readers land on this page. One is researching Paladin as a producer. The other typed "what happened to Fission Uranium" and needs a straight answer. This article serves both — Paladin first, then the Fission story — because after 2024 they are the same company.

Part 1 — Paladin Energy, the producer

Paladin is not a developer with a slide deck. It has a mine, it has pounds coming out of the ground, and it has the operational risk that comes with both. That distinction matters: producers carry ramp-up and cost risk that pre-revenue explorers simply don't have yet.

Langer Heinrich: a mine brought back from the dead

Langer Heinrich, in Namibia, is the whole story of Paladin's current cash flow. It's a conventional open-pit and heap/tank-leach operation that Paladin built and ran years ago, then placed on care and maintenance when uranium prices collapsed in the mid-2010s. Mothballing a mine is not the same as closing it — you keep the orebody, the licences, and much of the plant, and you wait for prices that justify a restart.

That restart is exactly what Paladin executed as the uranium price recovered. Bringing a mothballed mine back sounds simple and is not. Restart risk is real and specific:

• Refurbishment. Idle processing plants degrade. Pumps, leach circuits, and instrumentation need rework before a single pound flows.
• Reagents and feed. Early production often runs partly on stockpiled ore while the mining fleet ramps, which affects grade and recovery.
• Ramp-up curve. Nameplate capacity is a target, not a switch. Producers routinely take multiple quarters to hit steady-state throughput, recovery, and unit costs.
• Cost inflation. Labour, reagents, and power all cost more than they did when the mine last ran, so historic economics don't carry over one-for-one.

For a restart like this, the numbers that matter aren't the resource size — it's quarterly production, recovery rate, and all-in cost per pound trending toward guidance. Watch the trend, not any single quarter. If you're new to that last metric, our glossary explains all-in sustaining cost (AISC), the figure that tells you whether a producer actually makes money at a given uranium price.

Langer Heinrich also gives Paladin something most uranium names lack: a real, marked-to-market view of the spot price as revenue rather than theory. A producer's leverage cuts both ways — margins expand fast when prices rise and compress fast when they fall.

Patterson Lake South (PLS): the growth asset

The second pillar of Paladin is Patterson Lake South (PLS) in the southwestern Athabasca Basin of Saskatchewan — the Triple R deposit, which came to Paladin through the Fission acquisition (more on that below). Athabasca is the richest uranium district on Earth, with ore grades many times the global average, and PLS is one of its larger undeveloped high-grade deposits.

PLS is a development project, not a producer. It carries the usual developer timeline: permitting, environmental review, a construction decision, and financing — all still ahead of it. Its value to Paladin is optionality and scale. Langer Heinrich funds and de-risks the company today; PLS is the tier-one growth pipeline that could make Paladin materially larger next decade. Track its milestones on our projects page rather than any single headline. PLS sits inside the broader Canadian development field covered in our Canadian uranium stocks guide.

Paladin at a glance

Part 2 — What happened to Fission Uranium

Here is the plain answer many readers came for.

Fission Uranium Corp. was acquired by Paladin Energy in 2024 in an all-share transaction. After the deal closed, Fission stopped trading as an independent company. Its main asset — the PLS / Triple R project — is now a Paladin asset, and its shareholders were converted into Paladin shareholders.

What that means if you held Fission shares

In an all-share (all-stock) acquisition, you don't get cash for your shares. Instead, each Fission share is exchanged for a set number of the acquirer's shares, according to a fixed exchange ratio agreed in the deal. Practically:

• Your Fission position was converted into Paladin (PDN / PALAF) shares at that ratio.
• Your brokerage would have handled the swap automatically once the deal closed; you didn't need to do anything.
• If you can no longer find "Fission Uranium" or its old ticker in your account, that is expected — the line item became Paladin.
• Fractional shares from the ratio are typically settled in a small cash payment, depending on your broker's rules.

If you want to know the precise exchange ratio, the closing date, or the exact share count you received, check your own brokerage statements from 2024 and the deal documents Paladin and Fission filed at the time — those are authoritative for your specific holding, and they'll be exact where a general guide can't be.

Why the deal made sense

Strategically, the logic was clean: pair a cash-generating producer (Langer Heinrich) with a tier-one development asset (PLS) to build a larger, more diversified uranium company spanning two continents. Paladin got scale and a marquee Athabasca growth project; Fission holders got exposure to actual production and a bigger balance sheet instead of a single pre-revenue deposit. Deals like this are common late in a uranium up-cycle, when producers use strong share prices to acquire the next generation of mines.

So should you think of it as "Fission stock" anymore?

No — there is no Fission stock to buy. If your interest was Fission's PLS asset, the way to get that exposure now is by owning Paladin. Weigh it as a Paladin decision: you're buying a Namibian producer with ramp-up risk plus a Canadian development pipeline, not a pure-play PLS explorer.

How to actually buy PDN as a US investor

Paladin's primary, most liquid listing is on the ASX under PDN. US investors have two common routes:

1. International broker. Many US brokers offer access to the ASX (sometimes on request or via a global account), which lets you buy PDN directly in the deeper home market. Our ASX uranium stocks guide walks through the mechanics and the tax/FX wrinkles.
2. US OTC ticker PALAF. Paladin also trades over-the-counter in the US as PALAF. It's the same underlying company, but OTC lines are usually far less liquid than the home listing — wider spreads, thinner volume — so mind your order type.

For a side-by-side with other listed names, run Paladin through our uranium stock screener and read the broader ASX uranium stocks context before deciding how to hold it.

The bear case, stated fairly

A balanced view has three planks. Restart execution: a brought-back mine has to prove it can hit guided throughput, recovery, and costs consistently — early quarters can disappoint. Single-producer concentration: near-term cash flow leans heavily on one asset in one country, so operational or jurisdictional hiccups at Langer Heinrich hit hard. Development risk on PLS: the growth story is real but years and permits away, and Athabasca timelines are thorough and slow. None of this is disqualifying — it's the profile of a mid-tier producer with a big option attached, and it belongs in position sizing.

Frequently asked questions

What happened to Fission Uranium stock? Fission Uranium was acquired by Paladin Energy in 2024 in an all-share deal and stopped trading as an independent company. Former Fission shareholders had their shares converted into Paladin (PDN / PALAF) shares at the deal's exchange ratio, and Fission's Patterson Lake South project is now owned by Paladin.

Can I still buy Fission Uranium shares? No. There is no standalone Fission Uranium stock to buy. To get exposure to Fission's former PLS / Triple R asset, you would buy Paladin Energy, which now owns it.

What is Paladin Energy's main asset? The restarted Langer Heinrich uranium mine in Namibia, a conventional open-pit operation brought back from care and maintenance. Its main growth asset is the Patterson Lake South project in Canada's Athabasca Basin, acquired via Fission.

How can a US investor buy Paladin (PDN)? Paladin's primary listing is ASX: PDN, usually accessible through an international-capable broker, and it also trades over-the-counter in the US as PALAF, which is typically much less liquid. See our ASX uranium stocks guide for the details.

Is Langer Heinrich fully ramped up? Restarting a mothballed mine is a multi-quarter process, and the figures to watch are quarterly production, recovery, and cost per pound trending toward company guidance. Treat any single quarter as a data point, not a verdict, and check our projects page for updates.

This article is for informational purposes only and is not investment advice.