---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-047728"
form_type: "8-K"
ticker: "ON"
cik: "0001097864"
company_name: "ON SEMICONDUCTOR CORP"
filed_at: "2025-03-06T23:59:59+00:00"
generated_at: "2026-05-25T04:52:07.532885+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# onsemi proposes to acquire Allegro MicroSystems for $35.10 per share cash, $6.9B EV

## Summary
- All-cash proposal at $35.10/share represents 57% premium to Allegro's close on Feb 28, 2025.
- Implied enterprise value of $6.9 billion; initial $34.50/share offer made Sept 2, 2024.
- onsemi has attempted engagement for six months; urges Allegro board to negotiate in good faith.
- No financing contingency; deal would be funded by committed financing, cash, and revolving credit.
- Combination aims to create a diversified leader in automotive, industrial, and AI data center applications.

## SEC filing metadata
- accession: 0001193125-25-047728
- form_type: 8-K
- ticker: ON
- cik: 0001097864
- company_name: ON SEMICONDUCTOR CORP
- filed_at: 2025-03-06T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1097864/000119312525047728/0001193125-25-047728-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1097864/000119312525047728/d891589d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-047728
- JSON: https://secwatch.observer/filing/0001193125-25-047728.json
- Plain text: https://secwatch.observer/filing/0001193125-25-047728.txt

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