---
schema_version: "secwatch.filing_event.v1"
accession: "0001387467-22-000099"
form_type: "8-K"
ticker: "AOSL"
cik: "0001387467"
company_name: "ALPHA & OMEGA SEMICONDUCTOR Ltd"
filed_at: "2022-12-08T23:59:59+00:00"
generated_at: "2026-06-21T07:24:37.777349+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# AOS CEO transition: Dr. Mike Chang to Executive Chairman, Stephen Chang becomes CEO

## Summary
- Dr. Mike Chang, founder and current CEO, becomes Executive Chairman effective March 1, 2023.
- Stephen Chang, current President and son of Dr. Chang, appointed CEO on same date.
- Stephen Chang has been President since Jan 2021; Dr. Chang remains Chairman of the Board.
- Transition approved by Board after comprehensive succession review; Dr. Chang to focus on strategy and key relationships.

## SEC filing metadata
- accession: 0001387467-22-000099
- form_type: 8-K
- ticker: AOSL
- cik: 0001387467
- company_name: ALPHA & OMEGA SEMICONDUCTOR Ltd
- filed_at: 2022-12-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1387467/000138746722000099/0001387467-22-000099-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1387467/000138746722000099/aosl-20221206.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001387467-22-000099
- JSON: https://secwatch.observer/filing/0001387467-22-000099.json
- Plain text: https://secwatch.observer/filing/0001387467-22-000099.txt

## Key facts
- Executive change
  Dr. Mike F. Chang was appointed as Executive Chairman at ALPHA & OMEGA SEMICONDUCTOR Ltd.
  - Action: appointed
  - Role: Executive Chairman
  source text: Dr. Mike F. Chang, currently Chief Executive Officer and Chairman of the Board, will be appointed Executive Chairman of the Company and Mr. Stephen Chang, currently President, will be appointed as Chief Executive Officer (“CEO”), both effective as of March 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1387467/000138746722000099/0001387467-22-000099-index.htm
- Executive change
  Stephen Chang was appointed as Chief Executive Officer at ALPHA & OMEGA SEMICONDUCTOR Ltd.
  - Action: appointed
  - Role: Chief Executive Officer
  source text: Mr. Stephen Chang, currently President, will be appointed as Chief Executive Officer (“CEO”), both effective as of March 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1387467/000138746722000099/0001387467-22-000099-index.htm

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