---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-074198"
form_type: "8-K/A"
ticker: "LNTH"
cik: "0001521036"
company_name: "Lantheus Holdings, Inc."
filed_at: "2023-03-20T23:59:59+00:00"
generated_at: "2026-06-17T22:57:12.755380+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Lantheus promotes Paul Blanchfield to President, Dan Niedzwiecki to CAO

## Summary
- Paul Blanchfield appointed President effective March 20, 2023; CEO Mary Anne Heino remains CEO.
- Blanchfield base salary increased to $650,000; target annual bonus remains 60% of salary.
- Blanchfield granted equity awards valued at $1,006,390 split between PSUs, RSUs, and options.
- Dan Niedzwiecki promoted to Chief Administrative Officer, retains General Counsel role.
- Both promotions effective March 20, 2023; Blanchfield previously COO since June 2022.

## SEC filing metadata
- accession: 0001193125-23-074198
- form_type: 8-K/A
- ticker: LNTH
- cik: 0001521036
- company_name: Lantheus Holdings, Inc.
- filed_at: 2023-03-20T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1521036/000119312523074198/0001193125-23-074198-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1521036/000119312523074198/d405671d8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-074198
- JSON: https://secwatch.observer/filing/0001193125-23-074198.json
- Plain text: https://secwatch.observer/filing/0001193125-23-074198.txt

## Key facts
- Executive change
  Paul Blanchfield was appointed as President at Lantheus Holdings, Inc..
  - Action: appointed
  - Role: President
  source text: On March 4, 2023, the Compensation Committee of the Board of Directors of Lantheus Holdings, Inc. (the “Company”) appointed Paul Blanchfield as the President of the Company and its subsidiaries, effective March 20, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1521036/000119312523074198/0001193125-23-074198-index.htm

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