Market reaction

Issuer share price following the disclosure

Closing prices for UNITEDHEALTH GROUP INC’s common stock (UNH) around the filing date, set against the S&P 500 over the same period. The baseline is the last close preceding the filing date; percentage changes are computed on prices adjusted for splits and dividends.

Filings accepted by EDGAR after 5:30 p.m. Eastern are dated the following business day, so the filing date shown is generally the first session in which the market could respond. Offsets falling on non-trading days resolve to the next session. End-of-day price data provided by Tiingo.

Comparable filings

Structurally comparable filings in the corpus

Ranked by structural similarity over the extracted incident:v2 axes (attack source, data classes, materiality determinations, disclosure basis, records scale). Click any row to read that filing alongside its own extraction registry.

• WYTEC INTERNATIONAL INCWYTC

  8-K/A · Filed 2026-02-03 · Item 1.05 · +8.8% at 14 days · S&P 500 −1.8%

  website defacement
  Own systemsOp not_addressed
• Coupang, Inc.CPNG

  8-K/A · Filed 2025-12-29 · Item 1.05 · 7.01 · 9.01 · −8.7% at 14 days · S&P 500 +0.7%

  cybersecurity incident
  Own systemsOp not_addressed
• WYTEC INTERNATIONAL INCWYTC

  8-K · Filed 2025-08-29 · Item 1.05 · +1.7% at 14 days · S&P 500 +1.3%

  website defacement
  Own systemsOp not_addressed
• KEY TRONIC CORPKTCC

  8-K/A · Filed 2024-08-06 · Item 1.05 · 9.01 · +7.4% at 14 days · S&P 500 +8.0%

  unauthorized third party access to IT systems
  Own systemsOp not_addressed
• Inotiv, Inc.NOTV

  8-K · Filed 2026-05-18 · Item 1.01 · 1.02 · 2.03 · 5.02 · 5.03 · 8.01 · 9.01 · +5.1% at 14 days · S&P 500 +2.6%

  unauthorized access to the Company's systems
  Own systemsOp not_addressed