Follow the people · Insider
Fumihide Esaka
Fumihide Esaka files insider transactions with the SEC as a chief executive officer of Ambiq Micro (AMBQ). We hold 5 disclosed purchases and sales filed since 6 October 2025, 4 of them in the last 90 days.
- Files forAMBQ
- Disclosed buys and sells5 in all, 4 in the last 90 days
- Last disclosure2 September 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 2 October 2025 — 2 September 2026Chief Executive Officer · Ambiq Micro (AMBQ)39 Form 4 lines · source: SEC Form 4
Everything they disclosed
39 entries, newest first — one per disclosure report, one per Form 4 line- exercised options over 13,500 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- ▼ sold on the open market 48,973 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 1 September 2026 · filed 2 September 2026
- exercised options over 11,027 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 2 September 2026 · filed 2 September 2026
- ▼ sold on the open market 1,452 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 2 September 2026 · filed 2 September 2026
- ▼ sold on the open market 9,575 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 2 September 2026 · filed 2 September 2026
- exercised options over 13,500 shares of Ambiq Micro (a derivative holding)SEC Form 42 September 2026Stock Option (Right to Buy) · traded 31 August 2026 · filed 2 September 2026
- exercised options over 35,000 shares of Ambiq Micro (a derivative holding)SEC Form 42 September 2026Stock Option (Right to Buy) · traded 31 August 2026 · filed 2 September 2026
- exercised options over 9,271 shares of Ambiq Micro (a derivative holding)SEC Form 42 September 2026Stock Option (Right to Buy) · traded 31 August 2026 · filed 2 September 2026
- exercised options over 48,973 shares of Ambiq Micro (a derivative holding)SEC Form 42 September 2026Stock Option (Right to Buy) · traded 1 September 2026 · filed 2 September 2026
- exercised options over 11,027 shares of Ambiq Micro (a derivative holding)SEC Form 42 September 2026Stock Option (Right to Buy) · traded 2 September 2026 · filed 2 September 2026
- ▼ sold on the open market 5,899 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- ▼ sold on the open market 5,501 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- ▼ sold on the open market 2,100 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- exercised options over 44,271 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- ▼ sold on the open market 15,600 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- ▼ sold on the open market 13,800 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- ▼ sold on the open market 5,600 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 31 August 2026 · filed 2 September 2026
- exercised options over 48,973 shares of Ambiq MicroSEC Form 42 September 2026Common Stock · traded 1 September 2026 · filed 2 September 2026
- exercised options over 13,500 shares of Ambiq MicroSEC Form 418 August 2026Common Stock · traded 14 August 2026 · filed 18 August 2026
- ▼ sold on the open market 1,282 shares of Ambiq MicroSEC Form 418 August 2026Common Stock · traded 14 August 2026 · filed 18 August 2026
- ▼ sold on the open market 10,718 shares of Ambiq MicroSEC Form 418 August 2026Common Stock · traded 14 August 2026 · filed 18 August 2026
- ▼ sold on the open market 1,500 shares of Ambiq MicroSEC Form 418 August 2026Common Stock · traded 14 August 2026 · filed 18 August 2026
- exercised options over 13,500 shares of Ambiq Micro (a derivative holding)SEC Form 418 August 2026Stock Option (Right to Buy) · traded 14 August 2026 · filed 18 August 2026
- exercised options over 60,000 shares of Ambiq MicroSEC Form 418 May 2026Common Stock · traded 14 May 2026 · filed 18 May 2026
- ▼ sold on the open market 60,000 shares of Ambiq MicroSEC Form 418 May 2026Common Stock · traded 14 May 2026 · filed 18 May 2026
- exercised options over 45,463 shares of Ambiq MicroSEC Form 418 May 2026Common Stock · traded 15 May 2026 · filed 18 May 2026
- exercised options over 14,537 shares of Ambiq MicroSEC Form 418 May 2026Common Stock · traded 15 May 2026 · filed 18 May 2026
- exercised options over 60,000 shares of Ambiq Micro (a derivative holding)SEC Form 418 May 2026Stock Option (Right to Buy) · traded 14 May 2026 · filed 18 May 2026
- exercised options over 45,463 shares of Ambiq Micro (a derivative holding)SEC Form 418 May 2026Stock Option (Right to Buy) · traded 15 May 2026 · filed 18 May 2026
- exercised options over 7,936 shares of Ambiq Micro (a derivative holding)SEC Form 418 May 2026Stock Option (Right to Buy) · traded 15 May 2026 · filed 18 May 2026
- exercised options over 6,601 shares of Ambiq Micro (a derivative holding)SEC Form 418 May 2026Stock Option (Right to Buy) · traded 15 May 2026 · filed 18 May 2026
- was granted 160,616 shares of Ambiq MicroSEC Form 42 April 2026Common Stock · traded 6 March 2026 · filed 2 April 2026
- was granted 160,616 shares of Ambiq MicroSEC Form 410 March 2026Common Stock · traded 6 March 2026 · filed 10 March 2026
- was granted 160,616 shares of Ambiq MicroSEC Form 410 March 2026Common Stock · traded 6 March 2026 · filed 10 March 2026
- exercised options over 53,660 shares of Ambiq MicroSEC Form 410 February 2026Common Stock · traded 7 October 2025 · filed 10 February 2026
- exercised options over 53,660 shares of Ambiq Micro (a derivative holding)SEC Form 410 February 2026Stock Option (Right to Buy) · traded 7 October 2025 · filed 10 February 2026
- exercised options over 53,660 shares of Ambiq Micro (a derivative holding)SEC Form 410 February 2026Stock Option (Right to Buy) · traded 7 October 2025 · filed 10 February 2026
- exercised options over 53,660 shares of Ambiq MicroSEC Form 410 February 2026Common Stock · traded 7 October 2025 · filed 10 February 2026
- was granted 159,907 shares of Ambiq MicroSEC Form 46 October 2025Common Stock · traded 2 October 2025 · filed 6 October 2025
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.