---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-277754"
form_type: "8-K"
ticker: "LNTH"
cik: "0001521036"
company_name: "Lantheus Holdings, Inc."
filed_at: "2025-11-12T23:59:59+00:00"
generated_at: "2026-05-16T21:08:14.988517+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Lantheus CEO Brian Markison to retire Dec 31, 2025; consulting deal through Mar 31, 2026

## Summary
- CEO Brian Markison retiring effective Dec 31, 2025; enters consulting agreement from Jan 1 to Mar 31, 2026.
- Monthly advisory fee of $83,333 during consulting period, subject to restrictive covenants.
- Base salary paid through retirement; 2025 annual bonus paid lump sum within 60 days if earned.
- Outstanding equity awards vest through retirement date, then follow retirement provisions.
- No successor named; consulting period extendable by mutual agreement.

## SEC filing metadata
- accession: 0001193125-25-277754
- form_type: 8-K
- ticker: LNTH
- cik: 0001521036
- company_name: Lantheus Holdings, Inc.
- filed_at: 2025-11-12T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1521036/000119312525277754/0001193125-25-277754-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1521036/000119312525277754/d92727d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-277754
- JSON: https://secwatch.observer/filing/0001193125-25-277754.json
- Plain text: https://secwatch.observer/filing/0001193125-25-277754.txt

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