---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-324795"
form_type: "8-K"
ticker: "KRRO"
cik: "0001703647"
company_name: "Korro Bio, Inc."
filed_at: "2025-12-18T23:59:59+00:00"
generated_at: "2026-05-16T12:45:46.724029+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Korro Bio amends employment agreement for General Counsel Jeffrey Cerio; raises base salary, severance, grants RSUs

## Summary
- Amended employment agreement for Jeffrey Cerio effective Dec 15, 2025; base salary increased to $425,000.
- Severance increased: 9 months salary + prorated bonus outside CIC period; 12 months in CIC period.
- Awarded $100,000 cash bonus: 50% paid Dec 31, 2025 and 50% paid June 30, 2026 (subject to continued employment).
- Granted 41,902 RSUs vesting 50% on June 15, 2026 and 50% on Dec 15, 2026.

## SEC filing metadata
- accession: 0001193125-25-324795
- form_type: 8-K
- ticker: KRRO
- cik: 0001703647
- company_name: Korro Bio, Inc.
- filed_at: 2025-12-18T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1703647/000119312525324795/0001193125-25-324795-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1703647/000119312525324795/krro-20251215.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-324795
- JSON: https://secwatch.observer/filing/0001193125-25-324795.json
- Plain text: https://secwatch.observer/filing/0001193125-25-324795.txt

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