Mike F. Chang - SEC Form 4 Insider Trading Activity

Summary

Updated Aug 3, 2026

Mike F. Chang has filed 4 SEC Form 4 filings across 1 company in the last 90 days - buying. Lifetime open-market purchases: $641K.

Profile

Mike F. Chang is Executive Chairman at ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL). Chang has reported 9 insider filings with the SEC since 2024. The most recent filing was in July 2026.

RoleDirector, 10% Owner
Notability50/100

Board memberships

Reported roles

Trading Pattern

InsiderAlpha's records for Mike F. Chang go back to 2024: 9 primary Form 4 filings, an average of 3.0 per year. The typical open-market purchase is $641K (1 buy totaling $641K). The largest single buy on record is $641K of AOSL in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.

Career & Filing History

Every role Mike F. Chang has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-07-16AOSLALPHA & OMEGA SEMICONDUCTOR LtdG - Bona-fide gift23.8K$0.00
2026-06-03AOSLALPHA & OMEGA SEMICONDUCTOR LtdG - Bona-fide gift30.0K$0.00
2026-05-28AOSLALPHA & OMEGA SEMICONDUCTOR LtdG - Bona-fide gift39.8K$0.00
2026-05-27AOSLALPHA & OMEGA SEMICONDUCTOR LtdG - Bona-fide gift736.3K$0.00
2026-03-26AOSLALPHA & OMEGA SEMICONDUCTOR LtdA - Grant or award22.5K$0.00
2026-03-26AOSLALPHA & OMEGA SEMICONDUCTOR LtdF - Tax withholding / forfeiture14.4K$21.43$309K
2026-03-18AOSLALPHA & OMEGA SEMICONDUCTOR LtdA - Grant or award22.5K$0.00
2026-03-18AOSLALPHA & OMEGA SEMICONDUCTOR LtdF - Tax withholding / forfeiture9.8K$21.43$211K
2026-03-18AOSLALPHA & OMEGA SEMICONDUCTOR LtdF - Tax withholding / forfeiture18.0K$21.43$385K
2026-03-18AOSLALPHA & OMEGA SEMICONDUCTOR LtdA - Grant or award22.5K$0.00
2026-03-10AOSLALPHA & OMEGA SEMICONDUCTOR LtdP - Open-market purchase33.7K$19.00$641K
2025-10-21AOSLALPHA & OMEGA SEMICONDUCTOR LtdG - Bona-fide gift40.0K$0.00
2024-12-04AOSLALPHA & OMEGA SEMICONDUCTOR LtdG - Bona-fide gift30.0K$0.00

Companies - Last 90 Days

Other Insiders Active in the Same Stocks

Insiders who reported open-market trades at the companies Mike F. Chang has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.

More Notable Insiders

Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:

Frequently Asked Questions

Who is Mike F. Chang?

Mike F. Chang is Executive Chairman at ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL). Chang has reported 9 insider filings with the SEC since 2024. The most recent filing was in July 2026.…

How many SEC Form 4 filings has Mike F. Chang submitted recently?

4 primary Form 4 filings in the last 90 days, covering 1 company.

Has Mike F. Chang been buying or selling stock?

Recorded transactions: 1 open-market purchase ($641K) and 0 open-market sales across all tracked filings.

Where can I see all of Mike F. Chang's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

Open the live Mike F. Chang profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.