---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-081800"
form_type: "8-K"
ticker: "ADTN"
cik: "0000926282"
company_name: "ADTRAN Holdings, Inc."
filed_at: "2025-04-16T23:59:59+00:00"
generated_at: "2026-05-23T14:08:53.740464+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Adtran Networks SE revises 2024 loss to EUR 10.2M from previously reported EUR 4.5M loss

## Summary
- Inventory adjustment increased cost of goods sold, widening EBIT loss by EUR 5.7M.
- Revenues and cash position unchanged; full 2024 financials due April 30, 2025.
- Parent ADTRAN Holdings assessing impact on its consolidated historical statements.

## SEC filing metadata
- accession: 0001193125-25-081800
- form_type: 8-K
- ticker: ADTN
- cik: 0000926282
- company_name: ADTRAN Holdings, Inc.
- filed_at: 2025-04-16T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/926282/000119312525081800/0001193125-25-081800-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/926282/000119312525081800/d832749d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-081800
- JSON: https://secwatch.observer/filing/0001193125-25-081800.json
- Plain text: https://secwatch.observer/filing/0001193125-25-081800.txt

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