---
title: Ahold Delhaize puts the cost of its October cyberattack at up to €250 million in Q4 sales and up to €100 million in operating income, and cuts guidance | ctxsec
url: https://ctxsec.com/items/ahold-delhaize-q4-cyberattack-impact-up-to-250m-sales-100m-operating-income
description: "Ahold Delhaize expects the October incident, for which it took some systems offline, mainly affecting online capabilities in the Benelux and the U.S. and its Benelux supply-chain operations (Bol was not affected), to reduce Q4 net sales by \u20ac200-250 million and underlying and IFRS operating income by \u20ac75-100 million, with response and remediation costs on top. It lowered 2026 guidance: underlying operating margin approaching 4.0% (from around 4.0%), low-single-digit diluted underlying EPS growth (from mid to high single digits) and free cash flow around \u20ac2.1 billion (from at least \u20ac2.3 billion). CEO Frans Muller said most disruption was contained within two weeks, with work continuing to fully restore operations."
status: "official (Ahold Delhaize Q3 2026 results, Nov 4)"
published: 2026-11-04
---

> Ahold Delhaize expects the October incident, for which it took some systems offline, mainly affecting online capabilities in the Benelux and the U.S. and its Benelux supply-chain operations (Bol was not affected), to reduce Q4 net sales by €200-250 million and underlying and IFRS operating income by €75-100 million, with response and remediation costs on top. It lowered 2026 guidance: underlying operating margin approaching 4.0% (from around 4.0%), low-single-digit diluted underlying EPS growth (from mid to high single digits) and free cash flow around €2.1 billion (from at least €2.3 billion). CEO Frans Muller said most disruption was contained within two weeks, with work continuing to fully restore operations.

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official (Ahold Delhaize Q3 2026 results, Nov 4)

2026-11-04

### Ahold Delhaize puts the cost of its October cyberattack at up to €250 million in Q4 sales and up to €100 million in operating income, and cuts guidance

A concrete number for boards weighing resilience spending: one incident at a large grocer is worth roughly a quarter-billion euros of sales in a single quarter. See our [October item](/items/ahold-delhaize-incident-2026-10) for the incident.

Sources: [Ahold Delhaize: Q3 2026 results and updated 2026 guidance (Nov 4)](https://newsroom.aholddelhaize.com/ahold-delhaize-reports-resilient-q3-2026-results-and-updates-2026-guidance-to-reflect-business-disruption-caused-by-recent-cybersecurity-incident/)