BP's Buyback Hopes Meet a $6 Billion Castrol Question

Berenberg has raised its price target on BP to 715 pence from 650, keeping a Buy rating, as analyst Henry Tarr bets that a sturdier balance sheet could pave the way for share repurchases in 2027. The call rests on two pillars: a strong third-quarter trading statement and a favourable commodity price environment. Yet the same week brought a reminder that BP's balance-sheet story is as much about what it sells as what it earns.

The upgrade, reported in the media today, is explicitly an analyst expectation rather than a company commitment. Tarr's case leans on BP's trading update from just over a week ago, in which the oil major guided toward significantly lower net debt, a higher refining indicator margin, and gas marketing and trading results well ahead of the prior quarter. A supportive operating backdrop, the argument goes, can help deleverage the balance sheet — though whether that translates into buybacks remains a separate decision entirely.

A second target, a more cautious verdict

Berenberg is not alone in turning more constructive. TD Cowen's Jason Gabelman lifted his price target on the NYSE-listed shares to $49 from $47 yesterday, according to media reports, while retaining a Hold rating. He pointed to improved trading performance and better conversion of refining margins into earnings, following BP's quarterly outlook and a conversation with the investor relations team. Both analysts credit operational progress but reach different investment conclusions — and because the targets refer to different listings, they cannot be read side by side.

Refining margins nearly double

The operational backdrop is striking. According to Reuters, BP's refining margin climbed from $29.6 to $46.7 per barrel between the second and third quarters, a jump expected to contribute $1.9–2.1 billion to underlying earnings before interest and taxes. That figure is an expectation, not a reported result; confirmation in the upcoming quarterly figures would underpin the case for a strong operating quarter. Reuters also linked the strengthened earnings outlook for the third quarter of 2026 to the Iran war and disruptions in the Strait of Hormuz, with BP among the potential beneficiaries.

BP shares rose 1.2% to €7.40 today, a move that fits the refining narrative but does not settle the deeper question of how durable earnings will be after the planned restructuring.

Castrol: $6 billion now, earnings later

That restructuring is where the debate sharpens. On 26 December 2025, BP agreed to sell 65% of its Castrol lubricants business to Stonepeak for around $6 billion, with completion expected by the end of 2026 and proceeds earmarked for debt reduction. The transaction values Castrol at $10.1 billion and forms part of a $20 billion divestment programme. BP will retain 35% of a joint venture and can sell that stake after a two-year lock-up, so a full exit has not been agreed.

The distinction matters for investors: a signed agreement, an expected closing and the subsequent use of proceeds are three different things, and intended deleveraging is not the same as deleveraging already achieved. The terms also include $800 million for accelerated dividend payments, so the proceeds should not be mistaken for recurring operating income.

RBC's warning on payout quality

RBC analysts have cautioned that the Castrol sale could weigh on the long-term sustainability of the dividend and on earnings quality. A lower debt load, on this view, does not automatically mean a stronger distribution base. The counterargument concerns the quality of what remains rather than the immediate cash inflow — and it gains force if the refining tailwind fades. Today's elevated margins are tied to war and disrupted transport routes; should those conditions ease, the exceptional earnings boost could weaken, and a strong quarter would prove no lasting increase in earning power.

Impairments add another layer of caution. In the same trading update, BP guided toward post-tax write-downs of $3.0–4.5 billion, mainly in the gas business and low-carbon energy activities. A stronger balance sheet does not erase those earnings risks; Berenberg's Buy case rests on operational strength and financial relief carrying the day despite the charges.

What October will settle

BP publishes third-quarter 2026 results on 30 October. That release will show how the guided operational improvements and the impairments land in the quarterly accounts — and, for the buyback thesis, whether the balance-sheet trajectory justifies Berenberg's confidence. Alongside it, the Castrol closing expected by the end of 2026 remains the concrete transaction anchor. The two must be judged together: BP needs to raise proceeds and cut debt while preserving a resilient earnings base. That, rather than a one-off balance-sheet gain, is what decides whether the overhaul convinces.