---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-315910"
form_type: "8-K"
ticker: "ADTN"
cik: "0000926282"
company_name: "ADTRAN Holdings, Inc."
filed_at: "2025-12-11T23:59:59+00:00"
generated_at: "2026-05-16T13:36:42.995248+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# ADTRAN extends CTO Glingener contract to Dec 2026; base salary raised to €400k

## Summary
- Term extended to Dec 31, 2026; base salary increased to €400,000 effective Oct 1, 2025.
- Annual target cash bonus set at 60% of base salary, tied to Adtran revenue and adjusted EBIT.
- Annual RSU and market-based PSU grants targeted at 40% of base salary each (€160,000 target for 2026).
- Total annual remuneration capped at €2,800,000; prior 3-year performance PSU (target €934,579) continues.

## SEC filing metadata
- accession: 0001193125-25-315910
- form_type: 8-K
- ticker: ADTN
- cik: 0000926282
- company_name: ADTRAN Holdings, Inc.
- filed_at: 2025-12-11T23:59:59+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/926282/000119312525315910/0001193125-25-315910-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/926282/000119312525315910/adtn-20251209.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-315910
- JSON: https://secwatch.observer/filing/0001193125-25-315910.json
- Plain text: https://secwatch.observer/filing/0001193125-25-315910.txt

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