---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-225119"
form_type: "8-K"
ticker: "SABS"
cik: "0001833214"
company_name: "SAB Biotherapeutics, Inc."
filed_at: "2025-09-30T23:59:59+00:00"
generated_at: "2026-05-17T05:17:42.278022+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Christine Hamilton and Jeffrey Spragens resign from SAB Biotherapeutics board; size cut to nine

## Summary
- Christine Hamilton and Jeffrey Spragens resigned as board members effective September 30, 2025.
- Board size reduced from 11 to 9 directors, per July 2025 letter agreement with RA Capital Healthcare Fund.
- Resignations were not the result of any disagreement with management or company policies.
- The changes follow terms of the company's July 2025 private placement of securities.

## SEC filing metadata
- accession: 0001193125-25-225119
- form_type: 8-K
- ticker: SABS
- cik: 0001833214
- company_name: SAB Biotherapeutics, Inc.
- filed_at: 2025-09-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1833214/000119312525225119/0001193125-25-225119-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1833214/000119312525225119/sabs-20250930.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-225119
- JSON: https://secwatch.observer/filing/0001193125-25-225119.json
- Plain text: https://secwatch.observer/filing/0001193125-25-225119.txt

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