Hanson Scott McLean 4

What Happened
Hanson Scott McLean, Ambiq Micro’s CTO and a company director, exercised stock options and sold a portion of the shares. On May 14–15, 2026 he exercised a total of 18,300 option shares (10,200 on 5/14 and 8,100 on 5/15) at a strike price of $8.12 ($148,596 total cost). On May 14 he sold 10,200 of those shares in open-market transactions for total proceeds of $706,252 (weighted-average sale prices reported). The filing also reports the corresponding derivative items at $0.00, which reflect conversion/disposition of the option instruments upon exercise.

Key Details

• Insider: Hanson Scott McLean — Chief Technology Officer and Director.
• Transactions:
  • May 14, 2026: Exercised 10,200 options @ $8.12 (acquired; $82,824) and sold 10,200 shares in separate sales: 3,900 @ $68.62 ($267,631), 6,100 @ $69.59 ($424,521), 200 @ $70.50 ($14,100). Total May 14 sale proceeds ≈ $706,252.
  • May 15, 2026: Exercised 8,100 options @ $8.12 (acquired; $65,772). No sale reported for these 8,100 shares in this filing.
  • Two lines show the derivative instrument disposed at $0.00 (these reflect exercise/conversion of the option itself).
• Sale price ranges (per footnotes): May 14 sales ranged $68.22–$69.01; other May 14 sales ranged $69.295–$70.24. The filing gives weighted-average prices and the reporting person will provide a per-price breakdown on request (F1, F2).
• Vesting note: The option grant had a vesting schedule (1/4 vested Aug 16, 2019, then 1/48 monthly thereafter), so exercised options were vested (F3).
• Shares owned after the transaction: Not reported in the excerpt provided.
• Filing: Report filed May 18, 2026 for transactions on May 14–15, 2026 — filed within the usual Form 4 reporting window (timely).

Context
This was an option exercise followed by same-day open-market sales of the shares acquired on May 14 (a common pattern when executives exercise options and sell some or all of the resulting shares). McLean paid $148,596 to exercise 18,300 shares and realized about $706k from the 10,200 shares sold on May 14; net proceeds attributable to the May 14 exercise-and-sale (sales minus exercise cost for the 10,200 exercised that day) are roughly $623k. The May 15 exercised shares (8,100) were acquired and not sold according to this filing.