NYSE · CIK 0001500412
AMBQ Ambiq Micro, Inc.
Insider trading from SEC Form 4. Last filing 6 d ago. Close $58.56 on Oct 9, 2026, +157% from the 52-week low and -35% from the high.
Last 90 days
Net insider value
-$16M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
11
$16M by 5 insiders
Insiders on file
9
with a Form 4 at this company
Price and insider trades, last year
AMBQOct 9, 2026 · close 58.56
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Ambiq Micro, Inc., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 53Moderate | Jeffrey G Winzeler Chief Financial Officer sell | $380k 5,455 shares | -5% | +200% from low-25% from high | |
| 49Moderate | Scott McLean Hanson Chief Technology Officer sell | $604k 8,680 shares | -4% | +200% from low-25% from high | |
| 65Notable | Fumihide Esaka Chief Executive Officer sell | $1.2M 16,560 shares | -4% | +200% from low-25% from high | |
| 44Moderate | Sean Chihhsiang Chen President and COO sell | $952k 14,007 shares | -12% | +200% from low-25% from high | |
| 11Weak | Scott McLean Hanson Chief Technology Officer sell | $422k 7,000 shares | -3% | - | |
| 60Notable | Ker Zhang director sell | $634k 10,000 shares | -33% | - | |
| 35Weak | Fumihide Esaka Chief Executive Officer sell | $4.0M 63,500 shares | -12% | - | |
| 29Weak | Sean Chihhsiang Chen President and COO sell | $902k 15,000 shares | -11% | - | |
| 15Weak | Ker Zhang director sell | $11k 185 shares | -1% | - | |
| 28Weak | Sean Chihhsiang Chen President and COO sell | $858k 15,000 shares | -11% | - | |
| 35Weak | Fumihide Esaka Chief Executive Officer sell | $6.2M 108,500 shares | -23% | - |
Transactions
The last 80 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -2,492 | $69.11 | $172k | 117,783 | 6 d ago |
| Oct 2, 2026 | Jeffrey G Winzeler Chief Financial Officer | SOpen-market sale Common Stock | -2,343 | $69.11 | $162k | 103,956 | 6 d ago |
| Oct 2, 2026 | Scott McLean Hanson Chief Technology Officer | SOpen-market sale Common Stock | -3,728 | $69.11 | $258k | 217,498 | 6 d ago |
| Oct 2, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock | -7,113 | $69.11 | $492k | 453,347 | 6 d ago |
| Oct 2, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -3,008 | $69.77 | $210k | 114,775 | 6 d ago |
| Oct 2, 2026 | Jeffrey G Winzeler Chief Financial Officer | SOpen-market sale Common Stock | -2,828 | $69.77 | $197k | 101,128 | 6 d ago |
| Oct 2, 2026 | Scott McLean Hanson Chief Technology Officer | SOpen-market sale Common Stock | -4,500 | $69.77 | $314k | 212,998 | 6 d ago |
| Oct 2, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock | -8,585 | $69.77 | $599k | 444,762 | 6 d ago |
| Oct 2, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -302 | $71.86 | $22k | 114,473 | 6 d ago |
| Oct 2, 2026 | Jeffrey G Winzeler Chief Financial Officer | SOpen-market sale Common Stock | -284 | $71.86 | $20k | 100,844 | 6 d ago |
| Oct 2, 2026 | Scott McLean Hanson Chief Technology Officer | SOpen-market sale Common Stock | -452 | $71.86 | $32k | 212,546 | 6 d ago |
| Oct 2, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock | -862 | $71.86 | $62k | 443,900 | 6 d ago |
| Oct 5, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -5,508 | $66.38 | $366k | 108,965 | 6 d ago |
| Oct 5, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -1,797 | $67.29 | $121k | 107,168 | 6 d ago |
| Oct 5, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -800 | $68.08 | $54k | 106,368 | 6 d ago |
| Oct 5, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -100 | $69.51 | $6,951 | 106,268 | 6 d ago |
| Sep 15, 2026 | Scott McLean Hanson Chief Technology Officer | MOption exercise Common Stock10b5-1 | +7,000 | $8.12 | $57k | 228,226 | 25 d ago |
| Sep 15, 2026 | Scott McLean Hanson Chief Technology Officer | SOpen-market sale Common Stock10b5-1 | -1,953 | $59.53 | $116k | 226,273 | 25 d ago |
| Sep 15, 2026 | Scott McLean Hanson Chief Technology Officer | SOpen-market sale Common Stock10b5-1 | -4,947 | $60.56 | $300k | 221,326 | 25 d ago |
| Sep 15, 2026 | Scott McLean Hanson Chief Technology Officer | SOpen-market sale Common Stock10b5-1 | -100 | $61.00 | $6,100 | 221,226 | 25 d ago |
| Sep 15, 2026 | Scott McLean Hanson Chief Technology Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -7,000 | $0.00 | $0 | 45,279 | 25 d ago |
| Sep 11, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Common Stock10b5-1 | +50,000 | $12.60 | $630k | 510,460 | 27 d ago |
| Sep 11, 2026 | Ker Zhang director | SOpen-market sale Common Stock | -9,100 | $63.39 | $577k | 21,266 | 27 d ago |
| Sep 14, 2026 | Sean Chihhsiang Chen President and COO | MOption exercise Common Stock10b5-1 | +15,000 | $8.12 | $122k | 135,275 | 27 d ago |
| Sep 11, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -42,083 | $63.27 | $2.7M | 468,377 | 27 d ago |
| Sep 14, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -2,600 | $59.36 | $154k | 132,675 | 27 d ago |
| Sep 11, 2026 | Ker Zhang director | SOpen-market sale Common Stock | -900 | $63.95 | $58k | 20,366 | 27 d ago |
| Sep 11, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -7,917 | $63.86 | $506k | 460,460 | 27 d ago |
| Sep 14, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -11,000 | $60.24 | $663k | 121,675 | 27 d ago |
| Sep 15, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Common Stock10b5-1 | +13,500 | $8.12 | $110k | 473,960 | 27 d ago |
| Sep 14, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -1,400 | $60.83 | $85k | 120,275 | 27 d ago |
| Sep 14, 2026 | Sean Chihhsiang Chen President and COO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -15,000 | $0.00 | $0 | 134,423 | 27 d ago |
| Sep 15, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -3,785 | $59.56 | $225k | 470,175 | 27 d ago |
| Sep 15, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -9,615 | $60.55 | $582k | 460,560 | 27 d ago |
| Sep 15, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -100 | $61.00 | $6,100 | 460,460 | 27 d ago |
| Sep 11, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -19,007 | $0.00 | $0 | 0 | 27 d ago |
| Sep 11, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -30,993 | $0.00 | $0 | 144,279 | 27 d ago |
| Sep 15, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -13,500 | $0.00 | $0 | 58,507 | 27 d ago |
| Sep 4, 2026 | Ker Zhang director | MOption exercise Common Stock | +1,785 | $5.88 | $10k | 30,551 | 33 d ago |
| Sep 4, 2026 | Sean Chihhsiang Chen President and COO | MOption exercise Common Stock10b5-1 | +15,000 | $8.12 | $122k | 135,275 | 33 d ago |
| Sep 4, 2026 | Ker Zhang director | SOpen-market sale Common Stock | -185 | $56.92 | $11k | 30,366 | 33 d ago |
| Sep 4, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -12,874 | $57.09 | $735k | 122,401 | 33 d ago |
| Sep 4, 2026 | Ker Zhang director | MOption exercise Stock Option (Right to Buy)derivative | -1,785 | $0.00 | $0 | 0 | 33 d ago |
| Sep 4, 2026 | Sean Chihhsiang Chen President and COO | SOpen-market sale Common Stock10b5-1 | -2,126 | $57.68 | $123k | 120,275 | 33 d ago |
| Sep 4, 2026 | Sean Chihhsiang Chen President and COO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -15,000 | $0.00 | $0 | 149,423 | 33 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Common Stock10b5-1 | +13,500 | $8.12 | $110k | 464,689 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -5,899 | $56.87 | $335k | 458,790 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -5,501 | $57.75 | $318k | 453,289 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -2,100 | $58.52 | $123k | 451,189 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Common Stock10b5-1 | +44,271 | $12.60 | $558k | 495,460 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -15,600 | $56.81 | $886k | 479,860 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -13,800 | $57.70 | $796k | 466,060 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -5,600 | $58.46 | $327k | 460,460 | 40 d ago |
| Sep 1, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Common Stock10b5-1 | +48,973 | $12.60 | $617k | 509,433 | 40 d ago |
| Sep 1, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -48,973 | $56.39 | $2.8M | 460,460 | 40 d ago |
| Sep 2, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Common Stock10b5-1 | +11,027 | $12.60 | $139k | 471,487 | 40 d ago |
| Sep 2, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -1,452 | $56.15 | $82k | 470,035 | 40 d ago |
| Sep 2, 2026 | Fumihide Esaka Chief Executive Officer | SOpen-market sale Common Stock10b5-1 | -9,575 | $56.77 | $544k | 460,460 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -13,500 | $0.00 | $0 | 72,007 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -35,000 | $0.00 | $0 | 79,007 | 40 d ago |
| Aug 31, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -9,271 | $0.00 | $0 | 175,272 | 40 d ago |
| Sep 1, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -48,973 | $0.00 | $0 | 30,034 | 40 d ago |
| Sep 2, 2026 | Fumihide Esaka Chief Executive Officer | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -11,027 | $0.00 | $0 | 19,007 | 40 d ago |
| Oct 2, 2025 | Jeffrey G Winzeler Chief Financial Officer | AGrant or award Common Stock | +52,667 | $0.00 | $0 | 52,667 | Oct 6, 2025 |
| Oct 2, 2025 | Scott McLean Hanson Chief Financial Officer | AGrant or award Common Stock | +83,819 | $0.00 | $0 | 132,818 | Oct 6, 2025 |
| Oct 2, 2025 | Fumihide Esaka Chief Executive Officer | AGrant or award Common Stock | +159,907 | $0.00 | $0 | 176,913 | Oct 6, 2025 |
| Oct 2, 2025 | Sean Chihhsiang Chen President and COO | AGrant or award Common Stock | +56,029 | $0.00 | $0 | 56,029 | Oct 6, 2025 |
| Jul 29, 2025 | Timothy Chen director | AGrant or award Common Stock | +47,618 | $0.00 | $0 | 47,618 | Jul 31, 2025 |
| Jul 29, 2025 | Ker Zhang director | AGrant or award Common Stock | +23,809 | $0.00 | $0 | 23,809 | Jul 31, 2025 |
| Jul 29, 2025 | Joseph A Tautges director | AGrant or award Common Stock | +56,546 | $0.00 | $0 | 56,546 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Common Stockindirect: By: KPCB Holdings, Inc., as nominee | +748,046 | - | - | 1,172,079 | Jul 31, 2025 |
| Jul 31, 2025 | Wen Hsuan HSIEH director | CConversion Common Stockindirect: By: Matter Venture Partners Fund I, L.P. | +394,989 | - | - | 394,989 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Common Stockindirect: By KPCB Holdings, Inc., as nominee | +98,958 | - | - | 1,271,037 | Jul 31, 2025 |
| Jul 31, 2025 | Wen Hsuan HSIEH director | CConversion Series G Convertible Preferred Stockderivativeindirect: By: Matter Venture Partners Fund I, L.P. | -394,989 | $0.00 | $0 | 0 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Common Stockindirect: By KPCB Holdings, Inc., as nominee | +23,294 | - | - | 1,294,331 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Common Stockindirect: By KPCB Holdings, Inc., as nominee | +194,618 | - | - | 1,488,949 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Series C Convertible Preferred Stockderivativeindirect: By: KPCB Holdings, Inc., as nominee | -748,046 | $0.00 | $0 | 0 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Series D Convertible Preferred Stockderivativeindirect: By: KPCB Holdings, Inc., as nominee | -98,958 | $0.00 | $0 | 0 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Series E Convertible Preferred Stockderivativeindirect: By: KPCB Holdings, Inc., as nominee | -22,594 | $0.00 | $0 | 0 | Jul 31, 2025 |
| Jul 31, 2025 | KPCB XVI Associates, LLC owner | CConversion Series F Convertible Preferred Stockderivativeindirect: By: KPCB Holdings, Inc., as nominee | -171,064 | $0.00 | $0 | 0 | Jul 31, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Sean Chihhsiang ChenPresident and COO
- Timothy Chendirector
- Fumihide EsakaChief Executive Officer
- Wen Hsuan HSIEHdirector
- Scott McLean HansonChief Financial Officer
- KPCB XVI Associates, LLCowner
- Joseph A Tautgesdirector
- Jeffrey G WinzelerChief Financial Officer
- Ker Zhangdirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.