---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-104439"
form_type: "8-K"
ticker: "ASRT"
cik: "0001808665"
company_name: "Assertio Holdings, Inc."
filed_at: "2025-10-30T23:59:59+00:00"
generated_at: "2026-05-17T01:24:09.038665+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Assertio appoints Mark Reisenauer as CEO, replacing Brendan O'Grady

## Summary
- CEO Brendan O'Grady separated effective Oct 27, 2025; entitled to severance under his existing agreement.
- Board appoints director Mark Reisenauer as CEO; receives $800k base salary, 85% target bonus (no 2025 bonus), and initial equity grants (1M options + 500k RSUs).
- Reisenauer has 30+ years experience, previously President of U.S. Commercial at Astellas (~$5B sales).
- Company to report Q3 2025 results on Nov 10, 2025; expects to update guidance within current range at that time.

## SEC filing metadata
- accession: 0001104659-25-104439
- form_type: 8-K
- ticker: ASRT
- cik: 0001808665
- company_name: Assertio Holdings, Inc.
- filed_at: 2025-10-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1808665/000110465925104439/0001104659-25-104439-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1808665/000110465925104439/tm2529606d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-104439
- JSON: https://secwatch.observer/filing/0001104659-25-104439.json
- Plain text: https://secwatch.observer/filing/0001104659-25-104439.txt

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