---
schema_version: "secwatch.filing_event.v1"
accession: "0001193805-22-001719"
form_type: "8-K"
ticker: "ARCT"
cik: "0001768224"
company_name: "Arcturus Therapeutics Holdings Inc."
filed_at: "2022-12-13T23:59:59+00:00"
generated_at: "2026-06-21T05:34:58.370030+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Arcturus appoints former Merck Global Vaccines President John Markels to board

## Summary
- John Markels, Ph.D., appointed to Board of Directors effective December 8, 2022.
- Markels most recently President of Global Vaccines at Merck; retired March 2022 after 35 years.
- He will provide strategic oversight to Arcturus' vaccine franchise and manufacturing processes.
- Markels also serves on the board of Sangamo Therapeutics.

## SEC filing metadata
- accession: 0001193805-22-001719
- form_type: 8-K
- ticker: ARCT
- cik: 0001768224
- company_name: Arcturus Therapeutics Holdings Inc.
- filed_at: 2022-12-13T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1768224/000119380522001719/0001193805-22-001719-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1768224/000119380522001719/e618121_8k-arct.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193805-22-001719
- JSON: https://secwatch.observer/filing/0001193805-22-001719.json
- Plain text: https://secwatch.observer/filing/0001193805-22-001719.txt

## Key facts
- Executive change
  John Markels was appointed as Director at Arcturus Therapeutics Holdings Inc..
  - Action: appointed
  - Role: Director
  source text: On December 8, 2022, Dr. John Markels agreed to serve as a member of the Board of Directors of Arcturus Therapeutics Holdings Inc.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1768224/000119380522001719/0001193805-22-001719-index.htm

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