---
schema_version: "secwatch.filing_event.v1"
accession: "0001356576-24-000020"
form_type: "8-K"
ticker: "SUPN"
cik: "0001356576"
company_name: "SUPERNUS PHARMACEUTICALS, INC."
filed_at: "2024-04-24T23:59:59+00:00"
generated_at: "2026-06-03T09:26:06.669421+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Director John M. Siebert to retire from Supernus Board at June 2024 annual meeting

## Summary
- John M. Siebert, Ph.D., will retire from the Board effective at the Annual Meeting in June 2024.
- Siebert will not stand for re-election; decision not due to any disagreement with the company.
- Siebert served on the Board for over a decade.

## SEC filing metadata
- accession: 0001356576-24-000020
- form_type: 8-K
- ticker: SUPN
- cik: 0001356576
- company_name: SUPERNUS PHARMACEUTICALS, INC.
- filed_at: 2024-04-24T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1356576/000135657624000020/0001356576-24-000020-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1356576/000135657624000020/supn-20240422.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001356576-24-000020
- JSON: https://secwatch.observer/filing/0001356576-24-000020.json
- Plain text: https://secwatch.observer/filing/0001356576-24-000020.txt

## Key facts
- Executive change
  John M. Siebert retired as Director at SUPERNUS PHARMACEUTICALS, INC..
  - Action: retired
  - Role: Director
  source text: On April 22, 2024, John M. Siebert, Ph.D. informed Supernus Pharmaceuticals, Inc. (the “Company”) that he has decided to retire from the Company's Board of Directors (the "Board"), effective at the Company's Annual Meeting of Stockholders in June 2024
  evidence_url: https://www.sec.gov/Archives/edgar/data/1356576/000135657624000020/0001356576-24-000020-index.htm

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