Britain's BP on Tuesday reported a sharp upswing in second-quarter profit, as energy supermajors reap massive profits from higher fossil fuel prices amid hostilities between the U.S. and Iran.

The oil giant posted underlying replacement cost profit, used as a proxy for net profit, of $5.7 billion for the April to June period. That beat analyst expectations of $5 billion, according to an LSEG-compiled consensus.

BP's net profit came in at $2.35 billion over the same period last year and $3.2 billion for the first three months of 2026.

The results come as oil and gas prices have surged amid the sprawling Middle East conflict. The fighting has severely disrupted shipping through the strategically vital Strait of Hormuz, a narrow maritime choke point that typically handles around a fifth of the world's oil and natural gas.

U.S. President Donald Trump on Monday lashed out at U.S. oil majors Exxon Mobil and Chevron for making "too much money" off higher fuel prices amid the Iran war, reiterating his demand for lower prices at the pump.

"They're making too much money based on a shortage," Trump told reporters at the White House. "I don't like it."

Exxon's second-quarter profits more than doubled to $14.5 billion compared to a year ago, while Chevron's earnings soared by nearly 400% to $12 billion compared to $2.5 billion in the same period last year. CNBC has reached out to Exxon and Chevron for comment.

"Look, I understand the pressure that the ordinary household feels when they pull into the service station to fill up and see the prices. The reality is we produce a global commodity and the prices for the product we sell hangs off that global commodity price," BP CEO Meg O'Neill told CNBC's "Squawk Box Europe" on Tuesday.

"What BP is doing is making sure that we are focused on the things we can do to try to help address the situation. We're driving hard on reliability, both on our upstream assets where we produce those barrels and the refining assets where we refine them."

O'Neill said the company had made adjustments to how the firm's refining runs are set up to maximize the availability of products consumers most need at any point in time, citing jet fuel and diesel as an example.

BP has been pushing ahead with its simplification drive as it doubles down on its core business model of oil and gas and divests non-core assets to reduce debt.

The company said Monday that it had completed the sale of its Gelsenkirchen refinery and related businesses to investment firm Klesch Group, in a deal expected to lower the oil giant's underlying operating expenditure by around $1 billion.

BP is also seeking to stabilize its management team after a turbulent period of executive turnover.

The London-listed firm abruptly removed its chairman Albert Manifold in May after just eight months on the job. The board cited "serious concerns" related to governance standards, oversight and conduct, while Manifold disputed allegations the allegations.

Shares of BP have surged over 27% year-to-date.