---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-156741"
form_type: "8-K"
ticker: "ADTN"
cik: "0000926282"
company_name: "ADTRAN Holdings, Inc."
filed_at: "2023-05-30T23:59:59+00:00"
generated_at: "2026-06-14T12:23:27.847227+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# ADVA CEO Christoph Glingener to step down; Thomas Stanton to assume role July 1, 2023

## Summary
- Christoph Glingener steps down as CEO of ADVA effective June 30, 2023; returns to CTO of ADVA and remains CTO of ADTRAN Holdings.
- Thomas Stanton, President and CEO of ADTRAN Holdings, becomes CEO of ADVA effective July 1, 2023.
- Transition is a planned leadership change at the majority-owned subsidiary.

## SEC filing metadata
- accession: 0001193125-23-156741
- form_type: 8-K
- ticker: ADTN
- cik: 0000926282
- company_name: ADTRAN Holdings, Inc.
- filed_at: 2023-05-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/0001193125-23-156741-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/d462466d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-156741
- JSON: https://secwatch.observer/filing/0001193125-23-156741.json
- Plain text: https://secwatch.observer/filing/0001193125-23-156741.txt

## Key facts
- Executive change
  Thomas Stanton was appointed as Chief Executive Officer of ADVA at ADTRAN Holdings, Inc..
  - Action: assume
  - Role: Chief Executive Officer of ADVA
  source text: Thomas Stanton, President and CEO of the Company, will assume the position of CEO of ADVA effective July 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/0001193125-23-156741-index.htm
- Executive change
  Christoph Glingener changed role as Chief Technology Officer of ADVA at ADTRAN Holdings, Inc..
  - Action: transition
  - Role: Chief Technology Officer of ADVA
  source text: Christoph Glingener, Chief Technology Officer of the Company, will step down as Chief Executive Officer (“CEO”) of ADVA effective June 30, 2023, at which time he will transition to his previous role of Chief Technology Officer (“CTO”) of ADVA.
  evidence_url: https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/0001193125-23-156741-index.htm

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