Ransomware attacks on utilities: 244 confirmed incidents, 2019 to 2026

// CONFIRMED RANSOMWARE ATTACKS · SECTOR

Ransomnews has confirmed 244 ransomware attacks on utilities between April 2019 and August 2026, each one verified against a public source such as a breach notification, regulatory filing, court record or press report. That is 2.6% of the 9,520 confirmed incidents in the dataset. So far in 2026, 11 have been confirmed, against 22 in 2025 and 34 in 2024. The United States accounts for 72 of them (30%), with victims recorded in 54 countries in total. Where the operator is attributed, LockBit leads with 17 confirmed victims. A ransom payment is on the public record in 1 case and a refusal in 27; the outcome is unrecorded in the remaining 216.

Confirmed ransomware attacks on utilities by year

The current year is a partial count. Confirmation lags the attack itself, so recent months keep filling in after the fact; read a low figure for the latest year as incomplete rather than as a decline.

Which ransomware groups attack utilities most

The operator is attributed in 187 of the 244 confirmed incidents. Counts are confirmed victims, not leak-site claims, so they run well below the totals the groups publish about themselves. Group names link to the live Ransomtracker profile where one exists.

Where the confirmed attacks on utilities fall

Country shares carry a reporting bias. United States breach-notification law and SEC disclosure rules push far more incidents onto the public record than most jurisdictions, which makes American attacks easier to confirm and inflates the US share of any confirmed dataset.

Ransom payment outcomes for utilities

Among the 28 confirmed utility incidents where the outcome is on the public record, 1 paid and 27 refused, a disclosed payment rate of 3.6%. The remaining 216 carry no public statement either way. Victims that pay have every incentive to stay quiet and public bodies are the most likely to announce a refusal, so treat this as the disclosed rate, not the true one. The ransomware payment rate analysis explains how the disclosed rate has moved since 2018 and how it compares with incident-response firm samples.

Largest confirmed ransomware attacks on utilities by records exposed

Record counts are recorded only where a named source disclosed them, which is the minority of cases, so this table ranks disclosed impact rather than true impact.

Most recent confirmed ransomware attacks on utilities

The 25 most recently confirmed of 244 incidents, newest first. Every row links to the public source it was verified against.

Frequently asked questions

How to read this page. Every incident counted here was verified by Ransomnews against at least one public source. Leak-site listings alone do not qualify, because operators inflate, duplicate and occasionally fabricate claims, so these totals are a defensible floor rather than a full census. Records exposed and ransom outcomes appear only where a named source disclosed them. The page is regenerated from the live database, which refreshes weekly. Cite as: Ransomnews Confirmed Ransomware Attacks Dataset, ransomnews.com, with a link to this page. Bulk access and methodology questions: [email protected]. See also the monthly ransomware statistics and the Ransomtracker.