---
schema_version: "secwatch.filing_event.v1"
accession: "0001568651-26-000028"
form_type: "8-K"
ticker: "OSCR"
cik: "0001568651"
company_name: "Oscar Health, Inc."
filed_at: "2026-04-21T23:59:59+00:00"
generated_at: "2026-05-15T05:06:32.500028+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Oscar Health appoints new Board Chair, Siddhartha Sankaran, effective June 4

## Summary
- 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.

## SEC filing metadata
- accession: 0001568651-26-000028
- form_type: 8-K
- ticker: OSCR
- cik: 0001568651
- company_name: Oscar Health, Inc.
- filed_at: 2026-04-21T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1568651/000156865126000028/0001568651-26-000028-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1568651/000156865126000028/oscr-20260421.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001568651-26-000028
- JSON: https://secwatch.observer/filing/0001568651-26-000028.json
- Plain text: https://secwatch.observer/filing/0001568651-26-000028.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.