---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-053920"
form_type: "8-K"
ticker: "ADTN"
cik: "0000926282"
company_name: "ADTRAN Holdings, Inc."
filed_at: "2024-05-07T23:59:59+00:00"
generated_at: "2026-06-02T21:33:56.491718+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# ADTRAN Q1 GAAP net loss $324.6M on goodwill impairment; revenue above guidance midpoint

## Summary
- GAAP net loss $324.6M ($4.12 diluted EPS); includes non-cash goodwill impairment.
- Revenue above Q1 guidance midpoint; non-GAAP operating margin -3.9% within guidance of -7% to 0%.
- GAAP gross margin 31.9% (improved 484 bps YoY); non-GAAP gross margin 41.6% (improved 429 bps YoY).
- Sequential GAAP operating cash flow improved $53M; inventory reduction from Business Efficiency Program.
- CEO cites continued customer win rate momentum and Mosaic One platform expansion; expects margins to expand as markets normalize.

## SEC filing metadata
- accession: 0000950170-24-053920
- form_type: 8-K
- ticker: ADTN
- cik: 0000926282
- company_name: ADTRAN Holdings, Inc.
- filed_at: 2024-05-07T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/926282/000095017024053920/0000950170-24-053920-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/926282/000095017024053920/adtn-20240506.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-053920
- JSON: https://secwatch.observer/filing/0000950170-24-053920.json
- Plain text: https://secwatch.observer/filing/0000950170-24-053920.txt

## Key facts
- Earnings Releases
  ADTRAN Holdings, Inc. reported first quarter of 2024 results: net income GAAP net loss attributable to the Company for the first quarter of 2024, including the above mentioned impairment charge, EPS Diluted loss per share attributable to the Company for the first quarter was $4.12. Guidance reaffirmed.
  - Period: first quarter of 2024
  - Net income: GAAP net loss attributable to the Company for the first quarter of 2024, including the above mentioned impairment charge
  - EPS: Diluted loss per share attributable to the Company for the first quarter was $4.12
  - Guidance: reaffirmed
  - Result: reported results
  source text: GAAP net loss attributable to the Company for the first quarter of 2024, including the above mentioned impairment charge, was $324.6 million. Diluted loss per share attributable to the Company for the first quarter was $4.12.
  evidence_url: https://www.sec.gov/Archives/edgar/data/926282/000095017024053920/0000950170-24-053920-index.htm

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