---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-236820"
form_type: "8-K"
ticker: "SNSE"
cik: "0001829802"
company_name: "Sensei Biotherapeutics, Inc."
filed_at: "2026-05-22T20:01:45+00:00"
generated_at: "2026-05-22T21:30:14.717989+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Sensei Biotherapeutics delays Karen Vousden board appointment to later 2026; board size set to five

## Summary
- Karen Vousden delays board appointment to later 2026 due to personal reasons; Board to consider appointment in Q3 or Q4 2026.
- If stockholder matters pass at June 10 annual meeting, Bob Holmen to become chair of Nominating and Corporate Governance Committee on June 12.
- Board size approved at five directors effective upon reconstitution.
- Annual meeting scheduled June 10, 2026; definitive proxy filed April 27.

## SEC filing metadata
- accession: 0001193125-26-236820
- form_type: 8-K
- ticker: SNSE
- cik: 0001829802
- company_name: Sensei Biotherapeutics, Inc.
- filed_at: 2026-05-22T20:01:45+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1829802/000119312526236820/0001193125-26-236820-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1829802/000119312526236820/d900837d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-236820
- JSON: https://secwatch.observer/filing/0001193125-26-236820.json
- Plain text: https://secwatch.observer/filing/0001193125-26-236820.txt

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