McKechnie Mark 4

What Happened
Mark McKechnie, Chief Financial Officer and Treasurer of ACM Research (ACMR), exercised a total of 98,551 option-derived shares (two exercises) and concurrently sold 98,551 shares in open-market transactions on March 12, 2026. He paid $1,584,759 to exercise the options (60,000 shares @ $13.89 = $833,400; 38,551 shares @ $19.49 = $751,359) and received aggregate gross proceeds of about $4.49 million from multiple weighted-average sales (total sales proceeds ≈ $4,491,952). The exercises are reported as fully vested and exercisable.

Key Details

• Transaction date: March 12, 2026 (Form 4 filed March 13, 2026). Filing appears timely.
• Option exercises (code M): 60,000 shares exercised @ $13.89 (cost $833,400); 38,551 shares exercised @ $19.49 (cost $751,359). Footnote F8: options fully vested and exercisable.
• Open-market sales (code S): total 98,551 shares sold for combined proceeds ≈ $4,491,952 across multiple trades with weighted-average prices reported; individual sale blocks and weighted prices:
  • 11,910 shares @ $44.89 (≈ $534,640) — prices ranged $44.37–$45.35 (F2/F5)
  • 47,108 shares @ $45.74 (≈ $2,154,720) — ranges $45.37–$46.36 (F3) / $45.40–$46.39 (F6)
  • 982 shares @ $46.55 (≈ $45,712) — range $46.39–$46.59 (F4)
  • 8,639 shares @ $44.94 (≈ $388,237) — range $44.40–$45.39 (F5)
  • 29,348 shares @ $45.74 (≈ $1,342,378) — ranges noted above (F3/F6)
  • 564 shares @ $46.57 (≈ $26,265) — range $46.45–$46.59 (F7)
• The filing includes derivative disposition entries at $0 for the same 60,000 and 38,551-share blocks, reflecting conversion/exercise of derivatives into shares prior to sale.
• Trading plan: sales were made pursuant to a Rule 10b5‑1 trading plan adopted August 27, 2025 (F1).
• Shares owned after the transactions: not specified in the data you provided (noted as “not reported” here).

Context
These entries show an exercise of vested options followed by immediate or near-immediate open-market sales under a pre-established 10b5‑1 plan (effectively a cashless exercise/sale pattern). Such transactions often reflect option-exercise and liquidity management rather than an independent investment view; they are factual disclosures of insider activity, not commentary on company prospects.