---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-012605"
form_type: "8-K"
ticker: "LNTH"
cik: "0001521036"
company_name: "Lantheus Holdings, Inc."
filed_at: "2024-01-23T23:59:59+00:00"
generated_at: "2026-06-06T20:00:04.159027+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Lantheus CEO Heino retires March 1; Markison named CEO; FY23 revenue $1.295-1.297B, up 38-39%

## Summary
- Mary Anne Heino to retire as CEO effective March 1, 2024; becomes Chair of the Board.
- Brian Markison, current Board Chair, to become CEO effective March 1, 2024; serves as Executive Chairman until then.
- Julie McHugh appointed Lead Independent Director effective immediately.
- Markison employment agreement: $950k base salary, 100% target bonus, $8.5M equity award (50% RSU, 50% PSU).
- Preliminary FY2023 revenue expected $1.295-1.297B, up 38-39% YoY, exceeding prior guidance of $1.255-1.270B.

## SEC filing metadata
- accession: 0001193125-24-012605
- form_type: 8-K
- ticker: LNTH
- cik: 0001521036
- company_name: Lantheus Holdings, Inc.
- filed_at: 2024-01-23T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/0001193125-24-012605-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/d731182d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-012605
- JSON: https://secwatch.observer/filing/0001193125-24-012605.json
- Plain text: https://secwatch.observer/filing/0001193125-24-012605.txt

## Key facts
- Executive change
  Brian Markison was appointed as Executive Chairman at Lantheus Holdings, Inc..
  - Action: appointed
  - Role: Executive Chairman
  source text: The Company has also announced that Brian Markison, the Chairman of the Board, has been appointed Executive Chairman as of January 23, 2024 to serve in that role until the Effective Date and will become the Company’s Chief Executive Officer effective on the Effective Date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/0001193125-24-012605-index.htm
- Executive change
  Mary Anne Heino was appointed as Chair of the Board at Lantheus Holdings, Inc..
  - Action: appointed
  - Role: Chair of the Board
  source text: Ms. Heino will continue to serve as a member of the Board and has been appointed to serve as Chair of the Board as of the Effective Date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/0001193125-24-012605-index.htm
- Executive change
  Brian Markison was appointed as Chief Executive Officer at Lantheus Holdings, Inc..
  - Action: appointed
  - Role: Chief Executive Officer
  source text: The Company has also announced that Brian Markison, the Chairman of the Board, has been appointed Executive Chairman as of January 23, 2024 to serve in that role until the Effective Date and will become the Company’s Chief Executive Officer effective on the Effective Date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/0001193125-24-012605-index.htm
- Executive change
  Julie McHugh was appointed as Lead Independent Director at Lantheus Holdings, Inc..
  - Action: appointed
  - Role: Lead Independent Director
  source text: the Board has appointed Julie McHugh as Lead Independent Director of the Board, effective January 23, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/0001193125-24-012605-index.htm
- Executive change
  Mary Anne Heino retired as Chief Executive Officer at Lantheus Holdings, Inc..
  - Action: retired
  - Role: Chief Executive Officer
  source text: Mary Anne Heino, the Company’s Chief Executive Officer and a member of the Company’s board of directors (the “Board”), notified the Board on January 18, 2024, of her intention to retire as Chief Executive Officer, effective March 1, 2024
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521036/000119312524012605/0001193125-24-012605-index.htm

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