Rockhopper Exploration Reports Transformational Full Year Results as Sea Lion Phase 1 Sanctioned and Funded

Rockhopper’s 2025 full year results are one of those updates where the headline really does matter. Sea Lion Phase 1 is now sanctioned, funded and moving into development, which is a huge shift for a company that has spent years talking about potential rather than delivery.

In plain English, Rockhopper has gone from owning an interesting offshore oil asset to having a financed development plan with first oil targeted in 2028. That does not remove the risks – far from it – but it materially changes the investment case.

Rockhopper Sea Lion sanctioned and funded – why this is the breakthrough moment

The standout news is the Final Investment Decision, or FID, on Sea Lion Phase 1 in December 2025. FID is the point where a project formally moves from planning into execution. For Rockhopper, that is the biggest milestone it has achieved on Sea Lion since appraisal work finished back in 2012.

The funding package is substantial. Project financing includes US$1.0 billion of senior debt, with US$350 million allocated to Rockhopper, alongside equity raises and support from partner Navitas.

Key number	Reported figure
Sea Lion interest	35%
Senior debt package	US$1.0 billion
Rockhopper share of senior debt	US$350 million
Placing proceeds	US$142 million before expenses
Open Offer proceeds	US$9.2 million before expenses
Year-end cash and term deposits	US$179 million
Net 2P reserves	110 mmbbls
Net 2C resources	211 mmbbls

The placing brought in approximately US$142 million before expenses through 201,102,976 new shares at 53p, with 50,275,732 warrants attached at an 80p strike price. Then the Open Offer in January 2026 added another US$9.2 million and was 7.8x oversubscribed. That level of demand matters because it shows shareholder appetite was strong despite the dilution.

My view: this is clearly positive. Small upstream oil companies often get stuck between discovery and development because the funding hurdle is simply too big. Rockhopper has now cleared that hurdle for Phase 1.

Sea Lion development progress is real, but it is not risk free

Commercial contracts are now in place for key areas including the FPSO charter, drilling rig, and drilling and completion services. An FPSO is a floating production, storage and offloading vessel – basically a ship that processes and stores oil offshore.

There has already been one cost bump. Because of the war with Iran and its knock-on effects, the joint venture moved FPSO upgrade work from the Middle East to Asia, adding approximately US$45 million to the total project budget. Rockhopper says its net extra equity cost is US$5.25 million and that it remains funded for Phase 1.

That is manageable, but it is also an early reminder that mega-projects rarely run in a straight line. Investors should not ignore that signal.

Sea Lion reserves and resources give Rockhopper much more than just a one-phase project

The updated independent report from Netherland Sewell and Associates is another big part of the story. Following FID, some Sea Lion volumes have moved from contingent resources into reserves, which is a major de-risking step.

Rockhopper now reports 110 mmbbls of net 2P reserves and 211 mmbbls of net 2C resources. 2P means proved plus probable reserves – barrels considered commercially recoverable with a reasonable degree of confidence. 2C means best estimate contingent resources – potentially recoverable, but not yet fully matured into reserves.

• Net 2P reserves: 109.8 mmbbls, rounded in the highlights to 110 mmbbls
• Net 2C resources: 211.1 mmbbls, rounded in the highlights to 211 mmbbls
• Net 2P future revenue NPV10: US$965.8 million
• Development pending 2C NPV10: US$1.2 billion

Those are serious numbers for a company of Rockhopper’s size. The important nuance, though, is that reserves and contingent resources are not the same thing. The company itself says 2C volumes should not simply be lumped in with reserves without considering the different technical and commercial risks.

Still, the broad message is clear: Sea Lion is not a one-shot asset. Phase 1 is the opening act, and management is already talking about accelerating later phases, including an MOU for a second larger FPSO with capacity of around 125,000 barrels per day. That MOU is non-binding, so treat it as interesting upside rather than bankable fact.

Rockhopper 2025 financial results – the loss looks ugly, but the balance sheet looks much stronger

At first glance, the profit and loss line is not pretty. Rockhopper reported a loss of US$39.7 million for 2025, compared with a profit of US$47.6 million in 2024.

But this is one of those cases where the accounting headline tells only part of the story. The swing was mainly driven by a reduction in the fair value of the monetisation agreement tied to the Ombrina Mare arbitration, the accounting treatment of insurance proceeds, and sharply higher administrative costs during a year packed with corporate activity.

• Administrative expenses rose to US$9.8 million from US$3.3 million
• Other income was US$35.2 million
• Other expenses were US$69.7 million
• Cash and cash equivalents were US$157.6 million
• Term deposits were US$13.4 million
• Total available liquidity including undrawn senior debt was US$521.0 million

That liquidity figure is the one I would focus on. Rockhopper is still pre-revenue, so cash matters more than reported earnings. On that front, the company looks far stronger than it did a year ago.

Dilution was the price of progress

There is no getting away from it – existing shareholders have been diluted. The company issued more than 201 million new shares in the placing, and a further 13,188,036 shares in the Open Offer after the year end. There are also 50,275,732 underwriting warrants at 80p.

Normally dilution is a red flag. Here, I think it is better seen as the cost of finally unlocking Sea Lion. If the project reaches first oil on schedule, most shareholders will likely consider that trade-off worthwhile.

Ombrina Mare arbitration, Falklands tax settlement and other loose ends still matter

Not everything here is rosy. The Ombrina Mare arbitration award was annulled, which was clearly a setback. The good news is that Rockhopper received €31 million under its insurance policy, and a new request for arbitration was filed in September 2025 with the new funder covering the costs.

That gives shareholders some continued exposure to a potential recovery without Rockhopper footing the bill for the new process. The catch is that any future recovery, after costs, would be used to reimburse the insurers for the €31 million insurance proceeds.

There is also a settled Falkland Islands tax issue to factor in. Rockhopper agreed to pay £30 million on an undiscounted basis in instalments linked to Sea Lion’s development timeline. That removes uncertainty, which is good, but it is still real money going out of the door over time.

Another point worth noting is the Early Project Failure requirement, currently estimated at US$52.5 million net to Rockhopper. The company is exploring ways to cover that through instruments such as a surety bond, guarantees or cash, and says it does not expect the net cost to exceed that amount. Even so, it is a live financing consideration.

What Rockhopper shareholders should watch next after the 2025 results

For me, this RNS changes the tone around Rockhopper. It is no longer mainly a story about patience and optionality. It is now about execution.

The next things that matter most are simple:

1. Whether Sea Lion construction and drilling keep to timetable
2. Whether costs stay under control after the first FPSO budget increase
3. Whether debt drawdown conditions are met smoothly
4. Whether the Italian disposal completes by the extended long-stop date of 30 June 2026

Overall, I’d call these results strongly positive with a few hard-edged caveats. Rockhopper has materially de-risked Sea Lion by getting it sanctioned and funded, and that is the sort of milestone that can redefine a company. But now comes the tough bit: delivering an offshore development in a remote basin, on budget and on time.

That is where the real value will be won or lost.