UK oil and gas: three producers shrink for every one that grows

The 347 UK oil and gas producers that publish a full profit-and-loss book £81.8bn of combined top-line income — of which £21.65bn is a single BP holding company’s dividend income rather than sales, leaving genuine revenue nearer £60bn — and the two clearest facts about them point the same way. First, this is a market in managed decline: among producers with a comparable prior year, 111 shrank turnover by more than 5% while only 43 grew by the same margin — nearly three shrinking for every one growing. Second, a surprising share of that £82bn was never pumped from UK waters. The list is stacked with London-registered companies producing in Azerbaijan, Angola, Pakistan, Ghana, Malaysia, Vietnam and Guyana; the actual North Sea slice sits underneath, being harvested for cash in the windfall-tax era rather than grown. Figures are approximate — verify against a company’s own accounts before relying on any single number.

Four things that change how you read every number below

Oil producers’ accounts mislead more than most, and four distortions matter before any table:

• Most of the big producers keep their books in US dollars. The sterling figures here are conversions, so part of every year-on-year move is the exchange rate, not the barrels.
• Groups fragment into per-field companies. BP alone appears five times in the top twelve; Harbour, NEO, Ithaca and Chrysaor each show up through a fan of single-asset entities. An entity’s margin is the economics of one field net of tax — not evidence of a well-run or badly-run company.
• Some entities double-count. Where a parent and its subsidiary both publish — Afentra and Afentra (Angola) each report the same £136.9M — the same barrels appear twice in any total.
• This is the windfall-tax era. North Sea profits carry a headline tax rate of 78% until at least 2030, which is precisely why the domestic operators behave like harvesters: maximise cash from existing fields, minimise new commitment, and let decommissioning liabilities set the endgame.

The giants: mostly not the North Sea

The top of the market is dominated by the supermajors’ entity structures — and by geography that has nothing to do with UK waters.

*BP Exploration Company is a pure holding vehicle with no employees and no sales: its £21.65bn “turnover” is a dividend received from BP Exploration Operating Company (also in this table), up from roughly £3.2bn-equivalent the year before — hence the +581% — and its £12.16bn profit is that dividend net of a ~£9.5bn write-down of the same subsidiary. It both inflates and double-counts any turnover total it sits in. **BP Exploration Operating’s profit exceeding its turnover is investment income from other group companies flowing through the P&L — a second reminder that entity accounts are not field economics.

Three more names clear £1bn: Tullow Oil (£1.16bn, Africa-focused, one of the few genuine standalone plcs here), BP Exploration (Epsilon) (£1.13bn) and one further BP-scale entity. Two exclusions from any competitive read: Shell Global LNG is a gas-marketing vehicle with no employees, and KCA Deutag is not a producer at all — it’s a drilling contractor (now part of Helmerich & Payne) that happens to sit in the extraction category, and its thin loss on £1.3bn is rig-services economics, not oil economics.

A barbell market: rich giants, marginal middle, a graveyard of explorers

The size distribution is a barbell. At the top, 92% of the £1bn+ names are profitable — big producing fields make money at almost any oil price. At the bottom sit 181 companies below £1M of turnover, only 38% profitable — largely pre-revenue explorers and licence-holding vehicles burning cash on the way to a discovery or a wind-up. The tell is the middle: the £25–100M band is only 52% profitable, the weakest band above the micro tail. That’s marginal-field economics — big enough to carry operating costs and decommissioning provisions, too small to absorb a bad year.

The margin table is geology, not management

Filter the mid-market to profitable operators at a 10%+ margin and the result looks like a list of exceptionally well-run independents. It isn’t. Of the twenty companies that pass, the large majority are ring-fenced subsidiaries of bigger groups holding one field or one country — the margin belongs to the rock and the oil price, not to a management team you could bet on.

…and twelve more, including further NEO, Chrysaor, Shell and TAQA single-purpose entities (one Shell services company posts a 98.4% “margin” — a captive recharging vehicle, excluded from any sensible read). The genuinely standalone operators in this band are the Central Asia specialists — Caspian Sunrise and Equus Petroleum, both running real headcount in Kazakhstan at 30%+ margins — and, on the services side, Exceed Torridon, one of the few names here that is both independent and hiring.

Growth, read with even more care than usual

Almost every big growth number in this market is structure, not sales. The two fastest “growers” are Harbour Energy plumbing: Harbour Energy Services (+5,175%) is the group’s internal staffing company scaling up after the Premier merger, and Harbour Energy Marketing (+1,214%) is a trading arm booking £680M at a 0.7% margin — a pass-through whose margin should never be compared with a producer’s. BP Exploration Company’s +581% is the subsidiary dividend noted above. Ithaca J E&P (+506%) and the NEO entities are assets moving between group companies.

The one genuine growth story is Afentra (+585% to £136.9M, PBT ≈£47.7M, headcount up ~40%): an AIM-listed company built deliberately to buy producing Angolan assets from exiting majors — growth by acquisition, but real barrels, real profit and real hiring. That it stands almost alone makes the wider point: in the 111-shrink / 43-grow market, the expanding names are consolidators absorbing someone else’s fields, not drillers finding new ones.

Structure: two groups behind half the money

Headline concentration is already high — the top 5 entities hold 55% of visible top-line income (a share flattered by BP Exploration Company’s £21.65bn dividend line), the top 20 hold 75% — but entity fragmentation means it understates the real thing. Reassemble the fan of BP and Shell companies and those two groups alone stand behind roughly half of the visible £82bn. This is not a market of hundreds of competitors; it is a handful of majors, a tier of consolidators (Harbour, NEO, Ithaca, EnQuest) rolling up the North Sea’s remaining decades, and a long tail of explorers.

The ownership data says the same thing from another angle: of the 347 companies, 288 are corporate-owned and only 24 individual-owned. This is a market of subsidiaries, not founders — about 6% carry Holdings/Bidco/Topco-style names, the fingerprint of buyout structures.

Entry has effectively stopped

The vintage profile dates the industry’s ambition. The biggest cohort was incorporated in the 2000s (108 companies — the last great licensing-round era), 85 predate 1990 (a few, like Attock Oil, by more than a century), and just 10 companies have been incorporated since 2021. Nobody starts a UK oil company any more; the corporate population, like the basin, is running down its inventory.

What the map shows

1. This is managed decline. 111 producers shrank turnover by more than 5%; 43 grew. The growers are consolidators buying fields, not explorers finding them.
2. Much of the £82bn isn’t North Sea oil — or even sales. Azerbaijan, Angola, Pakistan, Ghana, Malaysia, Vietnam and Guyana barrels flow through UK companies, and the single biggest line on the list is a holding company’s dividend income — the domestic basin is a shrinking slice of what UK oil accounts actually contain.
3. Entity accounts are not field economics. Dollar conversion, per-field fragmentation, intra-group transfers and holding income distort nearly every headline number; the +581% and 50%-margin entries are structure, not performance.
4. The middle is the danger zone. 92% of £1bn+ producers are profitable but only 52% of the £25–100M band — marginal fields carrying full costs and decommissioning provisions under a 78% headline tax.
5. Two groups stand behind roughly half the visible money, and 288 of 347 companies are corporate-owned — this is a market of subsidiaries, with Afentra the rare independent actually growing.
6. The pipeline of new companies is empty — ten incorporations since 2021, against 108 in the 2000s.

Methodology and caveats

This covers only the UK oil and gas extraction companies that publish a full profit-and-loss — 347 of the 446 active companies in the category; the rest publish abridged or dormant accounts with no revenue figures. Many producers account in US dollars, so sterling figures and year-on-year moves partly reflect exchange rates; where a parent and subsidiary both publish, the same revenue can appear twice — most materially, BP Exploration Company’s £21.65bn top line is dividend income from BP Exploration Operating Company rather than sales, and inflates the combined total by roughly a quarter; extreme proportional outliers are excluded from the charts. Business descriptions are directional. One large entity (KCA Deutag) is a drilling contractor rather than a producer and is excluded from producer comparisons. Figures are approximate — verify against a company’s own accounts before relying on any single number. This is analysis, not financial advice; no company named here is known to be for sale or in distress beyond what its accounts state.