Finance

M&S food sales growth accelerates as cyber hack impact fades, NielsenIQ data shows

Published by Global Banking & Finance Review

Posted on August 20, 2025

2 min read

· Last updated: January 22, 2026

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M&S food sales growth accelerates as cyber hack impact fades, NielsenIQ data shows
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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,

M&S food sales growth accelerates as cyber hack impact fades, NielsenIQ data ...

M&S Food Sales Performance

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.

Impact of Cyberattack

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%.

Market Share and Competitors

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.

NielsenIQ Findings

In May, M&S said the attack would cost it about 300 million pounds ($405 million) in lost operating profit.

Comparison with Worldpanel

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)

Key Takeaways

  • M&S food sales increased by 6.7% year-on-year.
  • Cyberattack in April initially impacted sales.
  • NielsenIQ reports steady market share at 3.7%.
  • Online clothing orders resumed after 46 days.
  • Robust performances noted in the grocery sector.

Frequently Asked Questions

What was the percentage increase in M&S food sales?
M&S recorded a 6.7% year-on-year increase in food sales over the 12 weeks to August 9.
How did the cyberattack affect M&S's operations?
The cyberattack led M&S to stop taking online clothing orders and take other systems offline, which reduced food availability and increased waste.
What financial impact did the cyberattack have on M&S?
M&S estimated that the cyberattack would cost it about 300 million pounds ($405 million) in lost operating profit.
When did M&S resume online clothing orders?
M&S resumed taking online orders for clothing lines on June 10 after a 46-day suspension due to the cyberattack.
What does NielsenIQ data indicate about M&S's grocery sales?
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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