Rockhopper Exploration

Rockhopper owns 35% of Sea Lion, a discovered field of 917 million barrels gross (2C), about 321 million net. The project reached FID on 10 December 2025 and financial close on 22 December, fully funded at sanction, which almost never happens in this industry. At 69.70p the shares trade well below my current risked NAV of roughly 114p at $70 Brent (134p at $80). If the schedule holds, that NAV grows to about 182p at first oil and toward 340p in the early 2030s. The market is still pricing the stranded explorer of the last fifteen years, and it reads the interest-free Navitas loan as a burden when in present-value terms it subsidises the equity. The de-risking from here happens on a known schedule, milestone by milestone.

For fifteen years Rockhopper was the company with the discovery that could not get financed, and a reputation like that outlives the facts. The facts have changed. Sea Lion is sanctioned, financial close has occurred, the FPSO is under refurbishment, and work on the islands has begun. Most of the risk stack that justified a deep discount (financing above all, but also sanction and political approval) has been removed for Phase 1.

The other part is horizon. There is no production and no earnings yet, so anyone screening on current numbers sees nothing. The de-risking happens on a known schedule over the next two years, and the equity should re-rate as each milestone gets ticked off. Waiting through that is the price of admission.

Rockhopper discovered Sea Lion in 2010 and farmed out to Premier Oil. When Premier was acquired by Harbour Energy in 2021, Harbour sold its Falklands interests to Navitas Petroleum, which now operates the field with 65%. In between came an oil-price collapse, COVID, and a near-decade wait for financing and political certainty. The market has been disappointed before, which goes some way to explaining the price.

After financial close, Rockhopper is debt-free at the corporate level aside from its share of project-level senior debt. Its equity contribution to Phase 1 was fully covered through a share issue admitted in late December 2025. Separately, the company continues its Ombrina Mare arbitration against Italy. The original €190m award was annulled on procedural grounds, not substantive ones, and has been re-filed. Any recovery is a bonus and sits outside my base case.

Sea Lion sits in the North Falkland Basin, about 220 km north of the islands in roughly 450 m of water. The development is a phased subsea tie-back to a redeployed FPSO. Both the engineering and the weather are broadly comparable to the North Sea, so this is well understood territory rather than a frontier project.

The field splits into three areas. The Northern Development Area is the sanctioned core: NDA Phases 1 and 2 are what reached FID, holding 314 mmbbl gross (110 net) of 2P reserves. Phase 1 means 11 wells producing around 50,000 bbl/d gross; Phase 2 adds roughly 12 step-out wells about three years after first oil, tied back to the same FPSO. The Central Development Area plus NDA Phase 3 hold the development-pending 2C resources (323 mmbbl gross, 113 net), which would need a second FPSO. The Southern Development Area is the unplanned upside, mainly the Isobel/Elaine fan complex of 181 mmbbl gross with development on hold, plus mapped prospectivity.

Across the whole field the gross recoverable base is 554 mmbbl (1C), 917 mmbbl (2C) and 1.56 bn bbl (3C), and each appraisal so far has revised the estimates upward. The Falkland Islands Government has approved the Field Development Plan for Phases 1 and 2 and granted a 35-year exploitation licence.

Navitas Petroleum, one of the largest energy companies on the Tel Aviv Stock Exchange, specialises in proven discoveries that got stuck and need one last push into production. Its most recent delivery was the Shenandoah development in the Gulf of Mexico. Navitas turned Sea Lion from a stalled discovery into a sanctioned development, and its Israeli institutional base anchored Rockhopper's capital raise. I see no downside in Rockhopper not being operator: it keeps 35% of a project run by a motivated, well-capitalised partner without carrying the cost and complexity of operatorship.

The financing gets misread a lot. The quoted "$2.1bn" is the gross Phase 1 funding requirement for the whole consortium, including financing costs. It is not Rockhopper's number. Two-thirds of Rockhopper's equity share of Phase 1 is carried by an interest-free loan from Navitas, repaid only after the senior debt, out of Rockhopper's share of project cash flows. An interest-free loan repaid from your own future cash flows costs far less in present-value terms than its face amount. Simple "NPV minus all debt" math treats it like ordinary debt and overstates the burden, which is why I handle the financing explicitly in the valuation.

The starting point is the independent NSAI reserves report, effective 31 December 2025. It gives the 2P reserves an NPV10 of $965.8m net to Rockhopper, and the development-pending 2C resources a separate unrisked NPV10 of $1.20bn, about $2.17bn combined. As NSAI itself cautions, those layers carry different risk and you cannot just add them up. My model risks them properly.

I work unlevered first and add financing explicitly. NSAI's cash flows already include the physical capex, so the naive "NPV minus debt" would deduct the build cost twice: the debt is what pays for capex that already sits inside the NPV. What I add instead are the genuine financing effects in present-value terms, meaning the benefit of the interest-free Navitas loan, less the pre-FID loan interest, less senior-debt interest and fees. The net of those is a modest adjustment.

I then split the value into three layers and risk each one on its own. Phase 1 is sanctioned, funded and in execution. Phase 2 sits in the same approved plan but has no separate investment decision and gets funded out of Phase 1's cash flows. The development-pending 2C is a third, lower-probability layer. Each gets its own chance of development, and that chance rises over time, following the industry's SPE-PRMS maturity ladder from "pending" to "sanctioned" to "on production". Today I put Phase 1 at 0.85, rising to 0.97 at first oil and 1.0 in production; Phase 2 at 0.50; the 2C at 0.20, rising around the assumed second-FPSO timing. These are judgement calls, and higher choices give higher values.

Risk is applied asymmetrically. Future revenue is weighted by the chance of development, and so is capex you have not yet spent (if a phase dies, you stop paying for it), but capex already spent is sunk and does not come back. Close to first oil, when the build cost is largely sunk but production has not started, this makes the downside heavier than a symmetric weight would suggest. I think that is the more honest treatment of where the risk actually sits.

On top of the NSAI-based layers I add a small Isobel/Elaine upside layer at roughly $6/boe, in line with broker practice, worth about 8 to 10p per share. The sum of the layers, plus cash and the financing adjustment, is divided across roughly 912m fully diluted shares. Future-dated values rise both because the chance of development climbs and because the 10% discount unwinds as cash flows draw nearer.

Expected risked NAV per share (pence), net to Rockhopper's 35%, across a $60–100 Brent range. This is the exact table the interactive tool above interpolates:

At $70 Brent my current risked NAV of about 114p compares with Canaccord Genuity's 130p Buy target of 3 June 2026, raised from 113p. Phase 1, the sanctioned and funded part, makes up roughly half of today's project value; Phase 2 and the contingent 2C each add about a quarter. By first oil the mix shifts. Most of Phase 1 is already priced in by then, so the incremental value creation comes from de-risking Phase 2 and the 2C over time.

In May 2026 Navitas signed a non-binding MOU for a second FPSO that could add 125,000 bbl/d gross, 43,750 net to Rockhopper. That vessel is what would unlock the development-pending 2C layer, and combined with Phases 1 and 2 it would take peak production toward 180,000 bbl/d gross. It is also the clearest overhang on the stock, because it is not financed yet, and I suspect that partly explains the current price.

Rockhopper's 35% share of a second vessel could be funded several ways: a new equity issue (dilutive), warrant exercises, Phase 1 first-oil cash flows, a repeat of the interest-free Navitas loan (which would be the friendliest to shareholders), or a third partner buying in. In practice it may be a mix, or something nobody has floated yet. Navitas has been financially creative before. Because the outcome is open, I left the second FPSO out of the valuation numbers entirely; it appears only as the assumed timing around which the 2C layer's chance of development rises.

The valuation leaves out, or barely values, several things that could turn out to matter:

• Ombrina Mare. The annulled €190m award against Italy has been re-filed, and any recovery would be a straight bonus.
• The southern-basin and satellite structures, beyond the small Isobel/Elaine layer I already include.
• Associated gas, which NSAI values at zero absent a gas market.
• M&A. Once Sea Lion produces, a larger company may prefer to own the 35% outright rather than partner with a small AIM company for decades, and that could crystallise value before first oil.
• Any acceleration of the contingent resources via the second FPSO, which I deliberately kept out of the numbers.

Plenty of risk has come off the table, but not all of it. The ones I weigh most:

• Execution. A remote offshore project: FPSO refurbishment, drilling, logistics and weather all carry schedule risk. Many key contracts are signed, which reduces the uncertainty without removing it.
• Dilution. Funding for the second FPSO is not arranged. A new equity issue would dilute, and selling down the working interest would shrink per-share cash flows. To me this is the clearest near-term overhang.
• Oil price. Each $10/bbl is worth roughly 20p of NAV. A sustained move toward $60 narrows the upside materially, although the project stays economic thanks to a low break-even.
• Early takeover. A single-asset vehicle can get acquired before it captures full value. Whether that counts as a risk depends on the price.
• Falklands geopolitics. Argentina continues to dispute sovereignty. This is old news that has not prevented sanction or financing, and in a 2013 referendum 99.8% of islanders voted to remain a UK Overseas Territory, but the dispute is real.
• Financing drag. The post-FID Navitas loan is interest-free but gets repaid from 85% of Rockhopper's share of cash flows, which delays free cash flow to equity in the early producing years.

The main catalyst is first oil, targeted for March 2028, but on a single-asset developer the re-rating tends to come in steps:

• 2026: the AGM of 30 June, which proposes adding a CFO and an Israeli-market non-executive director. The company frames this as opening access to institutional capital for the full development, so I read it as a signal on the second-FPSO financing route as much as governance. Also this year: sail-away and upgrade of the Aoka Mizu FPSO and its mobilisation toward the Falklands, the start of onshore and offshore preparation work, and any firming of the second-FPSO MOU into a binding agreement.
• 2027: start of drilling, targeted for early in the year, and progress through the first Phase 1 wells. Possibly an FID on the 2C resources. Navitas went from MOU to FID in about a year last time, so late 2027 is plausible, and it would be a major de-risking step for a layer that today carries only a 0.20 chance of development in my model. A third partner coming in is another possibility.
• 2028: FPSO arrival on the field, hook-up and commissioning, first oil in March, and the switch to producer status.
• Non-core: the re-filed Ombrina Mare arbitration.

Primary sources: Rockhopper company announcements, annual reports and results presentations; the NSAI reserves report effective 31 December 2025 as disclosed by the company; operator updates from Navitas Petroleum. The valuation model is my own, built on NSAI's annual after-tax net-to-Rockhopper cash flows. Reference share price: 69.70p, close of 24 June 2026. I make mistakes, so verify anything important against the original filings.

I may hold a position in RKH. This is not investment advice.