Every public data breach

44 disclosed this week · 26,355 on record

Marten Transport

Disclosed Mar 25, 202235,294 affectedConfirmed

Official notice

What is known

People affected35,294 (as reported by the organization)
DisclosedMar 25, 2022
DiscoveredOct 3, 2021
HappenedSep 30, 2021
AttackRansomware
Data exposedNot stated
SectorOther · US
StatusConfirmed

Sources

Notices filed

History of this record
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 35294by backfillSource
attack2026-09-25
unknown to ransomwareby backfillSource
discovered2026-09-25
empty to 2021-10-03by backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

Everything about Marten Transport