Published by Global Banking & Finance Review®
Posted on August 20, 2025
2 min readLast updated: January 22, 2026
Add as preferred source on GoogleM&S food sales rose by 6.7% as the effects of an April cyberattack diminished, according to NielsenIQ. The market share remains steady at 3.7%.
LONDON (Reuters) -British retailer Marks & Spencer recorded a 6.7% year-on-year increase in food sales over the 12 weeks to August 9 as the impact of a cyberattack in April faded from the figures, industry data showed on Wednesday.
Researcher NielsenIQ said M&S' grocery sales growth accelerated from 4.3% in last month's report. Its market share held steady at 3.7%.
As part of its management of the cyberattack, M&S stopped taking online clothing orders and also took other systems offline. That reduced food availability and also resulted in higher waste and logistics costs.
In May, M&S said the attack would cost it about 300 million pounds ($405 million) in lost operating profit.
The group resumed taking online orders for clothing lines on June 10 after a 46-day suspension following the attack, and restarted click and collect services on August 11 after a near four-month hiatus.
Other data on the grocery sector released by NielsenIQ broadly echoed the findings of rival researcher Worldpanel's report on Tuesday, with robust performances from online supermarket Ocado, discounter Lidl GB, industry leader Tesco and number two player Sainsbury's.
M&S was not included in Worldpanel's data set.
($1 = 0.7413 pounds)
(Reporting by James Davey; Editing by Jan Harvey)
M&S recorded a 6.7% year-on-year increase in food sales over the 12 weeks to August 9.
The cyberattack led M&S to stop taking online clothing orders and take other systems offline, which reduced food availability and increased waste.
M&S estimated that the cyberattack would cost it about 300 million pounds ($405 million) in lost operating profit.
M&S resumed taking online orders for clothing lines on June 10 after a 46-day suspension due to the cyberattack.
NielsenIQ reported that M&S's grocery sales growth accelerated from 4.3% in the previous month, maintaining a market share of 3.7%.
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