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Ambiq Micro, Inc.·4

May 18, 5:44 PM ET

Esaka Fumihide 4

Research Summary

AI-generated summary

Updated

Ambiq Micro (AMBQ) CEO Esaka Exercises Options, Sells 60K Shares

What Happened

  • Fumihide Esaka, CEO of Ambiq Micro, exercised stock options and sold shares. On May 14 and 15, 2026 he exercised options to acquire a total of 120,000 shares (60,000 on 5/14 at $8.12; 45,463 on 5/15 at $8.12; 14,537 on 5/15 at $12.60) for aggregate exercise cost of about $1,039,526. Separately, on May 14 he sold 60,000 shares in an open-market transaction at a weighted average price of $70.02 for gross proceeds of $4,201,122. Several related derivative dispositions were reported at $0, reflecting conversion/exercise of derivative instruments (reported under code M).

Key Details

  • Transaction dates/prices:
    • 2026-05-14: Exercised 60,000 shares @ $8.12 — cost $487,200.
    • 2026-05-14: Sold 60,000 shares (open market) @ weighted avg $70.02 — proceeds $4,201,122 (sales ranged $70.00–$70.45; weighted average noted in filing).
    • 2026-05-15: Exercised 45,463 shares @ $8.12 — cost $369,160.
    • 2026-05-15: Exercised 14,537 shares @ $12.60 — cost $183,166.
    • Several derivative dispositions reported at $0 (conversion/exercise of derivatives) on 5/14–5/15.
  • Shares owned after the transactions: not stated in the provided filing excerpt.
  • Notable footnotes:
    • F1: The $70.02 sale price is a weighted average; individual sale prices ranged $70.00–$70.45.
    • F2–F4: Vesting schedules for the underlying options are described (initial 1/4 vesting dates and monthly vesting thereafter).
  • Filing: Form 4 was filed May 18, 2026 reporting transactions on May 14–15, 2026. No late-filing indicator was provided in the supplied data.

Context

  • These entries are coded as exercise/conversion of derivatives (M) plus an open-market sale (S). Because Esaka exercised options and shares were sold the same days (at least for the May 14 activity), this appears to be an exercise with immediate sale of shares rather than a pure open-market buy—common for option-holders converting vested options into cash. The $0 derivative disposals reflect the conversion/cancellation of option instruments as part of these transactions. This report is factual and does not indicate the insider’s motivation.