---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-21-004926"
form_type: "8-K"
ticker: "ADTN"
cik: "0000926282"
company_name: "ADTRAN Holdings, Inc."
filed_at: "2021-11-29T23:59:59+00:00"
generated_at: "2026-06-28T05:15:01.841007+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# ADTRAN SVP of R&D Scheiterer to retire Nov 30; Termination Agreement signed Nov 26

## Summary
- Eduard Scheiterer's retirement effective Nov 30, 2021; entered Termination Agreement on Nov 26.
- Receives prorated annual salary (EUR 275,200.84), car/commuting allowances, and 2021 variable pay.
- Unvested RSUs accelerate; all unvested PSUs forfeited upon departure.
- Mutual release of claims; potential future consulting arrangement mentioned.
- Scheiterer resigns all roles including MD of ADTRAN GmbH; ADTRAN to update SEC designation.

## SEC filing metadata
- accession: 0000950170-21-004926
- form_type: 8-K
- ticker: ADTN
- cik: 0000926282
- company_name: ADTRAN Holdings, Inc.
- filed_at: 2021-11-29T23:59:59+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/926282/000095017021004926/0000950170-21-004926-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/926282/000095017021004926/adtn-20211126.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-21-004926
- JSON: https://secwatch.observer/filing/0000950170-21-004926.json
- Plain text: https://secwatch.observer/filing/0000950170-21-004926.txt

## Key facts
- Executive change
  Eduard Scheiterer retired as Senior Vice President of Research and Development of the Company and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH at ADTRAN Holdings, Inc..
  - Action: retired
  - Role: Senior Vice President of Research and Development of the Company and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH
  source text: Eduard Scheiterer, Senior Vice President of Research and Development of the Company and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH (the “Subsidiary”), had notified the Company of his intent to retire from his positions with the Company and the Subsidiary, effective November 30, 2021
  evidence_url: https://www.sec.gov/Archives/edgar/data/926282/000095017021004926/0000950170-21-004926-index.htm

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