Stephen Chunping Chang - 21 May 2026 Form 4 Insider Report for ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: AOSL
Reported as of: 21 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 May 2026, 16:02:11 UTC
Prior SEC filing: 20 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Yanbing Hong, attorney-in-fact for Stephen Chang

Key filing fact

Stephen Chunping Chang filed Form 4 for ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL) on 26 May 2026.

Key facts

This page summarizes Stephen Chunping Chang's Form 4 filing for ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 26 May 2026, 16:02.

Change

Previous filing in this sequence was filed on 20 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001722000 Primary reporting owner

Chang Stephen Chunping

Relationship: Chief Executive Officer, Director
Address: 475 OAKMEAD PKWY, SUNNYVALE
Signature: /s/ Yanbing Hong, attorney-in-fact for Stephen Chang
Signature date: 26 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AOSL transaction

Common Share

Gift

Transaction value
Shares: -2,000
Change %: -0.31%
Price: $0.000000^*
Shares after: 634,070
Date: 21 May 2026
Ownership: Direct
Footnotes: F1, F2, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Includes 22,500 unvested shares subject to the Market-Based Performance Share Unit (MSU) granted on July 1, 2018 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.

Footnote F2

Includes 79,375 unvested shares subject to the Performance Share Unit (PSU) granted on March 15, 2024 and March 17, 2025 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.

Footnote F3

Includes an aggregate of 161,250 shares subject to Restricted Share Unit awards (RSU) granted on March 15, 2023, March 15, 2024, March 17, 2025, and March 16, 2026 which will be issued as such units vest in accordance with their terms, and excludes 67,500 unvested common shares subject to the PSU granted on March 16, 2026, which may become vested upon achievement of certain corporate performance goals in the future.

Footnote F4

Reflects 169 shares acquired under the Issuer's Employee Stock Purchase Plan on May 14, 2026.