Chang Stephen Chunping 4

What Happened

• Stephen (Chunping) Chang, CEO of Alpha & Omega Semiconductor (AOSL), sold a total of 14,884 shares in open-market transactions on April 17, 2026. The sales were in three tranches: 1,492 shares at $32.90 ($49,087), 3,481 shares at $33.90 ($118,006), and 9,911 shares at $34.90 ($345,894), for aggregate proceeds of $512,987. These were disposals (sales), often routine for insiders, and were executed under a prearranged Rule 10b5-1 trading plan.

Key Details

• Transaction dates and prices:
  • 2026-04-17: 1,492 shares @ $32.90 = $49,087
  • 2026-04-17: 3,481 shares @ $33.90 = $118,006
  • 2026-04-17: 9,911 shares @ $34.90 = $345,894
• Total shares sold: 14,884; total proceeds: $512,987 (~$513K).
• Sales were effected pursuant to a Rule 10b5-1 trading plan adopted Sept 8, 2025 (footnote F1).
• Footnote on prices: reported prices are exact sale prices (F2).
• Ownership notes disclosed in the filing (unvested awards included):
  • 22,500 unvested Market-Based PSUs (granted July 1, 2018) (F3)
  • 79,375 unvested PSUs (granted Mar 15, 2024 & Mar 17, 2025) (F4)
  • 161,250 RSU shares (granted Mar 15, 2023; Mar 15, 2024; Mar 17, 2025; Mar 16, 2026) and 67,500 unvested PSUs from Mar 16, 2026 excluded from that RSU count (F5)
• Filing timeliness: Report covers trades on Apr 17, 2026 and was filed Apr 20, 2026 — within the standard Form 4 reporting window (not indicated as late).

Context

• These sales were made under a 10b5-1 plan, meaning they were prearranged and scheduled in advance of the trades; such plans often indicate routine disposition rather than real-time trading based on nonpublic information. For retail investors, purchases generally signal stronger insider conviction than sales; sales can be for many personal or diversification reasons and are not by themselves a directional signal.