secwatch.observer — SEC 8-K summary
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Issuer:     Oncology Institute, Inc. (TOI)
CIK:        0001799191
Form:       8-K
Filed at:   2026-05-22T20:30:17+00:00
Accession:  0001079973-26-000721
Event type: cyber
Sentiment:  negative
Materiality: 0.70
Item codes: 1.05, 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Oncology Institute patient data accessed in Vendor cybersecurity incident; operations sustained
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- On May 20, 2026, Kroll notified TOI that its Vendor detected unauthorized access to TOI patient data systems.
- Incident previously disclosed voluntarily in November 2025; now confirmed patient information compromised.
- TOI states operations continued in all material respects since detection; offering credit monitoring to affected patients.
- Company believes incident also affected other healthcare providers; reserving rights against third parties.
- Evaluation ongoing; TOI currently believes no material impact on operations, financial condition, or quality of care.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1799191/000107997326000721/0001079973-26-000721-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1799191/000107997326000721/toi_8k.htm
  HTML page:      https://secwatch.observer/filing/0001079973-26-000721

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer