secwatch.observer — SEC 8-K summary
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Issuer:     MARTEN TRANSPORT LTD (MRTN)
CIK:        0000799167
Form:       8-K
Filed at:   2021-10-27T23:59:59+00:00
Accession:  0001437749-21-024381
Event type: cyber
Sentiment:  negative
Materiality: 0.60
Item codes: 8.01
LLM model:  deepseek-v4-flash:cloud@v2

Marten Transport reports cyberattack on Oct 3; files encrypted, employee data possibly exposed
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- Detected on Oct 3, 2021; cyberattack accessed and encrypted files on servers; also downloaded certain data files.
- Investigation ongoing with external incident response professionals; law enforcement notified.
- Full system functionality restored quickly with minimal operational disruptions; containment and remediation measures implemented.
- Preliminary assessment indicates incident will not have a material impact on business, operations, or financial results.
- Employee data may have been at risk; company offering two years of credit monitoring and identity restoration services at no cost.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/799167/000143774921024381/0001437749-21-024381-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/799167/000143774921024381/mrtn20211026_8k.htm
  HTML page:      https://secwatch.observer/filing/0001437749-21-024381

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