---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-088048"
form_type: "8-K"
ticker: "ADGM"
cik: "0002006986"
company_name: "Adagio Medical Holdings, Inc."
filed_at: "2025-09-08T23:59:59+00:00"
generated_at: "2026-05-17T07:45:45.053950+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Adagio Medical appoints Deborah Kaster as CFO, replacing interim CFO Dan George

## Summary
- Deborah Kaster, previously CBO, becomes CFO effective September 5, 2025; Daniel George steps down as interim CFO.
- Kaster's annual base salary is $366,000; eligible for bonus up to 40% of base salary and 4% raise upon equity financing of at least $5 million.
- Kaster holds options to purchase 819,000 shares, with 728,000 time-based vesting over 4 years and 91,000 immediate upon change of control exceeding $250 million.
- Severance: 6 months salary for qualifying termination, or 12 months plus prorated bonus if termination occurs near a change of control.

## SEC filing metadata
- accession: 0001104659-25-088048
- form_type: 8-K
- ticker: ADGM
- cik: 0002006986
- company_name: Adagio Medical Holdings, Inc.
- filed_at: 2025-09-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2006986/000110465925088048/0001104659-25-088048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2006986/000110465925088048/tm2525353d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-088048
- JSON: https://secwatch.observer/filing/0001104659-25-088048.json
- Plain text: https://secwatch.observer/filing/0001104659-25-088048.txt

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