Co-op puts £285m revenue cost on 2025 cyber attack

Co-op has said the cyber attack it suffered in April 2025 cost it £285 million in revenue and had a £107 million impact on profitability.

In a trading update issued before it publishes full-year results and its annual report, the supermarket chain described its response to the attack as the hardest part of the financial year. The breach and the shutdown of its systems that followed are estimated to have wiped £285 million from revenue.

Without the attack, Co-op believes its revenue would have been only 0.3% below 2024. Its 2025 revenue was around £250 million lower than the previous year.

The attack also had a direct £86 million impact on profitability, turning a 2024 profit of £45 million into a 2025 loss of £126 million. The company said changes in health-related consumer behaviour and rising regulatory costs also contributed to the loss.

Co-op chair Debbie White said: “2025 was a challenging year, but those challenges have helped us reshape Co-op for the future. Despite a cyber attack and tough market conditions, our colleagues have shown incredible resilience, keeping communities served and essential services running.”

In October the company said the attack had led to a £206 million fall in sales and an £80 million hit to earnings, which included about £20 million of one-off, non-underlying costs.

The attack was carried out by a hacking group called DragonForce, which got into Co-op’s network and took large volumes of data from its systems. Chief executive Shirine Khoury-Haq said all 6.5 million members were affected. The data taken included names, contact information and other personal details of current and former Co-op Group members.

To protect its systems, Co-op shut down parts of its internal network. Its IT team worked to contain the threat, track the hackers’ activity and bring systems back gradually and safely, and the delay weighed heavily on its financial performance.

Co-op was one of several household names targeted by cyber attackers last year, alongside Jaguar Land Rover, Harrods and Marks and Spencer.