---
schema_version: "secwatch.filing_event.v1"
accession: "0001534969-23-000003"
form_type: "8-K"
ticker: "SERA"
cik: "0001534969"
company_name: "SERA PROGNOSTICS, INC."
filed_at: "2023-02-22T23:59:59+00:00"
generated_at: "2026-06-19T04:45:02.104164+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Sera Prognostics amends Baker Bros. director nomination right; ownership threshold raised to 9.9%

## Summary
- Amendment to Side Letter with Baker Bros. Advisors LP increases ownership threshold for director nomination from 4.0% to 9.9% of outstanding voting power.
- Nomination right suspended while Baker Bros. designee serves on board; right revives when designee leaves.
- Amendment dated February 16, 2023; filed as exhibit to 10-K for year ended December 31, 2022.

## SEC filing metadata
- accession: 0001534969-23-000003
- form_type: 8-K
- ticker: SERA
- cik: 0001534969
- company_name: SERA PROGNOSTICS, INC.
- filed_at: 2023-02-22T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1534969/000153496923000003/0001534969-23-000003-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1534969/000153496923000003/sera-20230216.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001534969-23-000003
- JSON: https://secwatch.observer/filing/0001534969-23-000003.json
- Plain text: https://secwatch.observer/filing/0001534969-23-000003.txt

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