Wang David H 4

What Happened

• David H. Wang, Chief Executive Officer, President, Director and a 10% owner of ACM Research (ACMR), exercised 110,000 options (60,000 on Mar 11, 2026 and 50,000 on Mar 12, 2026) at $1.00 per share (total exercise cost $110,000) and sold 110,000 common shares in open-market transactions for aggregate gross proceeds of $5,154,404. The sales were executed in multiple trades on Mar 11–12, 2026 at weighted-average prices reported between $44.92 and $48.34.

Key Details

• Transaction dates: March 11–12, 2026; Form 4 filed Mar 13, 2026 (appears timely).
• Options exercised: 60,000 (3/11) and 50,000 (3/12) at $1.00 each (total $110,000 paid).
• Market sales: 60,000 shares sold on 3/11 (55,373 @ $47.89 and 4,627 @ $48.34); 50,000 shares sold on 3/12 (10,561 @ $44.92; 38,737 @ $45.74; 702 @ $46.57). Total proceeds ≈ $5,154,404.
• Footnotes: Sales were made pursuant to a Rule 10b5-1 trading plan adopted Nov 29, 2024 (F1). Reported prices are weighted averages across multiple trades (F2–F6). The option was fully vested and exercisable (F7).
• Shares owned after transaction: Not specified in the provided extract; filing identifies Wang as a 10% owner.
• Filing timeliness: Period of report Mar 11, 2026; Form 4 filed Mar 13, 2026 — no late-filing indication in provided data.

Context

• This was an exercise of vested options followed by open-market sales of the resulting shares (i.e., a cashing-out of exercised options rather than a simple buy-and-hold purchase). The sales were executed under a pre-arranged 10b5-1 plan, which typically schedules trades in advance and may limit inference about immediate insider sentiment.