secwatch.observer — SEC 8-K summary
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Issuer:     Oscar Health, Inc. (OSCR)
CIK:        0001568651
Form:       8-K
Filed at:   2026-04-21T23:59:59+00:00
Accession:  0001568651-26-000028
Event type: leadership
Sentiment:  neutral
Materiality: 0.55
Item codes: 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Oscar Health appoints new Board Chair, Siddhartha Sankaran, effective June 4
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- Siddhartha Sankaran appointed independent Chair of Board, effective June 4, 2026.
- Succeeds Jeffery Boyd, who served as Chair since Feb 2021 and is not standing for reelection.
- Sankaran has over 20 years insurance experience, including executive roles at AIG, SiriusPoint, FWD Group.
- CEO Mark Bertolini expressed confidence in Sankaran leading Board through next phase of growth.
- Boyd's tenure included Oscar's IPO and transformation from startup to individual market leader.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1568651/000156865126000028/0001568651-26-000028-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1568651/000156865126000028/oscr-20260421.htm
  HTML page:      https://secwatch.observer/filing/0001568651-26-000028

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