---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-25-017228"
form_type: "8-K"
ticker: "ON"
cik: "0001097864"
company_name: "ON SEMICONDUCTOR CORP"
filed_at: "2025-05-05T23:59:59+00:00"
generated_at: "2026-05-22T16:27:48.560395+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# onsemi Q1 revenue $1.45B, GAAP loss $1.15/share, non-GAAP EPS $0.55, Q2 guide $1.4-1.5B

## Summary
- Revenue $1,445.7M, down 22% YoY and 16% sequentially; PSG fell 26%, AMG 19%, ISG 20%.
- GAAP net loss $486.1M ($1.15 diluted loss); non-GAAP net income $231.6M ($0.55 diluted EPS).
- GAAP gross margin collapsed to 20.3% from 45.8% YoY; non-GAAP gross margin 40.0%.
- Free cash flow $455M, up 72% YoY, representing 31% of revenue; returned 66% via buybacks.
- Q2 guidance: revenue $1.4-1.5B, GAAP EPS $0.45-$0.55, non-GAAP $0.48-$0.58.

## SEC filing metadata
- accession: 0001140361-25-017228
- form_type: 8-K
- ticker: ON
- cik: 0001097864
- company_name: ON SEMICONDUCTOR CORP
- filed_at: 2025-05-05T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1097864/000114036125017228/0001140361-25-017228-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1097864/000114036125017228/ef20048379_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-25-017228
- JSON: https://secwatch.observer/filing/0001140361-25-017228.json
- Plain text: https://secwatch.observer/filing/0001140361-25-017228.txt

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