United States Semiconductors & Semiconductor Equipment

Ambiq Micro Inc (AMBQ)

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Track

Ambiq Micro experienced 28 insider trading transactions over the past 90 days, totaling approximately $27.1 million in sales. No purchases occurred during this period. These divestments follow an August earnings report where the firm beat expectations. The stock price has declined 27.4% recently, reflecting broader market volatility.
Ticker: AMBQ Exchange: NYS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Ambiq Micro Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
SEAN CHEN Officer Officer
Transaction date
Proposed sale
Price
383.96
Quantity 49,079
Value US$2,414,912
KER ZHANG Director Non-Executive Director
Transaction date
Proposed sale
Price
236.76
Quantity 94,136
Value US$3,249,313
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
326.61
Quantity 37,247 -43.3%
Value US$1,339,906
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
56.15
Quantity 1,000 -0.3%
Value US$100,000
FUMIHIDE (HUMI) ESAKA Officer; Director Executive Director
Transaction date
Proposed sale
Price
56.69
Quantity 1,000
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
56.39
Quantity 1,000 -9.6%
Value US$100,000
FUMIHIDE (HUMI) ESAKA Officer; Director Executive Director
Transaction date
Proposed sale
Price
56.39
Quantity 1,000
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
58.46
Quantity 1,000 -1.2%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
57.70
Quantity 1,000 -2.9%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
56.81
Quantity 1,000 -3.1%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
58.52
Quantity 1,000 -0.5%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
57.75
Quantity 1,000 -1.2%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
56.87
Quantity 1,000 -1.3%
Value US$100,000
FUMIHIDE (HUMI) ESAKA Officer; Director Executive Director
Transaction date
Proposed sale
Price
57.42
Quantity 1,000
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
60.32
Quantity 1,000 -2.2%
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
59.69
Quantity 1,000 -9.1%
Value US$100,000
1.3
SCOTT HANSON Officer Officer
Transaction date
Proposed sale
Price
59.80
Quantity 1,000
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
59.58
Quantity 1,000 -11.1%
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
59.58
Quantity 1,000 -11.1%
Value US$100,000
1.3
SCOTT HANSON Officer Officer
Transaction date
Proposed sale
Price
59.58
Quantity 1,000
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Planned sale
Price
65.30
Quantity 1,000 -0.4%
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Planned sale
Price
64.41
Quantity 1,000 -2.5%
Value US$100,000
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Planned sale
Price
63.26
Quantity 1,000 -0.4%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
65.26
Quantity 1,000 -0.3%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
64.40
Quantity 1,000 -2.3%
Value US$100,000
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
63.29
Quantity 1,000 -0.3%
Value US$100,000
FUMIHIDE ESAKA Director; Officer Executive Director
Transaction date
Proposed sale
Price
64.34
Quantity 45,500
Value US$2,927,470
1.3
SCOTT HANSON Director; Officer Executive Director
Transaction date
Proposed sale
Price
64.34
Quantity 21,000
Value US$1,351,140
Chen Timothy Non-Executive Director
Transaction date
Sale
Price
81.57
Quantity 3,264 -100.0%
Value US$266,244
Chen Timothy Non-Executive Director
Transaction date
Sale
Price
80.61
Quantity 20,666 -86.4%
Value US$1,665,886
Chen Timothy Non-Executive Director
Transaction date
Sale
Price
79.72
Quantity 24,248 -50.3%
Value US$1,933,051
Chen Timothy Non-Executive Director
Transaction date
Sale
Price
78.85
Quantity 22,414 -31.8%
Value US$1,767,344
Triumph Way Investment Inc Director Non-Executive Director
Transaction date
Proposed sale
Price
79.99
Quantity 70,592
Value US$5,646,654
Chen Sean Chihhsiang President and COO Officer
Transaction date
Sale
Price
71.37
Quantity 23,334 -16.2%
Value US$1,665,455
Chen Sean Chihhsiang President and COO Officer
Transaction date
Sale
Price
70.53
Quantity 32,351 -18.4%
Value US$2,281,826
SEAN CHEN Officer Officer
Transaction date
Proposed sale
Price
70.89
Quantity 55,685
Value US$3,947,281
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
70.50
Quantity 200 -0.1%
Value US$14,100
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
69.59
Quantity 6,100 -2.9%
Value US$424,521
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
68.62
Quantity 3,900 -1.8%
Value US$267,631
2.6
Winzeler Jeffrey G Chief Financial Officer Officer
Transaction date
Sale
Price
70.65
Quantity 82 -0.1%
Value US$5,793
2.6
Winzeler Jeffrey G Chief Financial Officer Officer
Transaction date
Sale
Price
69.90
Quantity 25,918 -21.5%
Value US$1,811,619
Esaka Fumihide Chief Executive Officer Executive Director
Transaction date
Sale
Price
70.02
Quantity 60,000 -13.3%
Value US$4,201,122
2.6
JEFF G WINZELER Officer Officer
Transaction date
Proposed sale
Price
69.90
Quantity 26,000
Value US$1,817,410
1.3
SCOTT HANSON Officer Officer
Transaction date
Proposed sale
Price
69.24
Quantity 10,200
Value US$706,252
FUMIHIDE ESAKA Officer Officer
Transaction date
Proposed sale
Price
70.02
Quantity 60,000
Value US$4,201,122
0.5
Connors Michele Kim General Counsel Officer
Transaction date
Sale
Price
26.65
Quantity 151 -0.2%
Value US$4,024
0.5
Connors Michele Kim General Counsel Officer
Transaction date
Sale
Price
26.04
Quantity 660 -1.1%
Value US$17,185
1.3
Hanson Scott McLean Chief Technology Officer Executive Director
Transaction date
Sale
Price
31.00
Quantity 10,000 -7.5%
Value US$310,000
0.7
TAUTGES JOSEPH A Non-Executive Director
Transaction date
Sale
Price
31.00
Quantity 7,800 -13.8%
Value US$241,800
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-09-04 2026-09-04 PrS Proposed sale
SEAN CHEN

Officer

Officer
49,079
383.96
US$2,414,912 		49,079 383.96 US$2,414,912
2026-09-04 2026-09-04 PrS Proposed sale
KER ZHANG

Director

Non-Executive Director
94,136
236.76
US$3,249,313 		94,136 236.76 US$3,249,313
2026-09-02 2026-09-02 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
37,247 -43.3%
326.61
US$1,339,906 		37,247 -43.3% 326.61 US$1,339,906
2026-09-02 2026-09-02 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -0.3%
56.15
US$100,000 		1,000 -0.3% 56.15 US$100,000
2026-09-02 2026-09-02 PrS Proposed sale
FUMIHIDE (HUMI) ESAKA

Officer; Director

Executive Director
1,000
56.69
US$100,000 		1,000 56.69 US$100,000
2026-09-02 2026-09-01 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -9.6%
56.39
US$100,000 		1,000 -9.6% 56.39 US$100,000
2026-09-01 2026-09-01 PrS Proposed sale
FUMIHIDE (HUMI) ESAKA

Officer; Director

Executive Director
1,000
56.39
US$100,000 		1,000 56.39 US$100,000
2026-09-02 2026-08-31 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -1.2%
58.46
US$100,000 		1,000 -1.2% 58.46 US$100,000
2026-09-02 2026-08-31 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -2.9%
57.70
US$100,000 		1,000 -2.9% 57.70 US$100,000
2026-09-02 2026-08-31 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -3.1%
56.81
US$100,000 		1,000 -3.1% 56.81 US$100,000
2026-09-02 2026-08-31 PlS Planned sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -0.5%
58.52
US$100,000 		1,000 -0.5% 58.52 US$100,000
2026-09-02 2026-08-31 PlS Planned sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -1.2%
57.75
US$100,000 		1,000 -1.2% 57.75 US$100,000
2026-09-02 2026-08-31 PlS Planned sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -1.3%
56.87
US$100,000 		1,000 -1.3% 56.87 US$100,000
2026-08-31 2026-08-31 PrS Proposed sale
FUMIHIDE (HUMI) ESAKA

Officer; Director

Executive Director
1,000
57.42
US$100,000 		1,000 57.42 US$100,000
2026-08-28 2026-08-27 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -2.2%
60.32
US$100,000 		1,000 -2.2% 60.32 US$100,000
2026-08-28 2026-08-27 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -9.1%
59.69
US$100,000 		1,000 -9.1% 59.69 US$100,000
2026-08-27 2026-08-27 PrS Proposed sale
1.3
SCOTT HANSON

Officer

Officer
1,000
59.80
US$100,000 		1,000 59.80 US$100,000
2026-08-28 2026-08-26 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -11.1%
59.58
US$100,000 		1,000 -11.1% 59.58 US$100,000
2026-08-28 2026-08-26 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -11.1%
59.58
US$100,000 		1,000 -11.1% 59.58 US$100,000
2026-08-26 2026-08-26 PrS Proposed sale
1.3
SCOTT HANSON

Officer

Officer
1,000
59.58
US$100,000 		1,000 59.58 US$100,000
2026-08-18 2026-08-14 PlS Planned sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -0.4%
65.30
US$100,000 		1,000 -0.4% 65.30 US$100,000
2026-08-18 2026-08-14 PlS Planned sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -2.5%
64.41
US$100,000 		1,000 -2.5% 64.41 US$100,000
2026-08-18 2026-08-14 PlS Planned sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
1,000 -0.4%
63.26
US$100,000 		1,000 -0.4% 63.26 US$100,000
2026-08-18 2026-08-14 PlS Planned sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -0.3%
65.26
US$100,000 		1,000 -0.3% 65.26 US$100,000
2026-08-18 2026-08-14 PlS Planned sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -2.3%
64.40
US$100,000 		1,000 -2.3% 64.40 US$100,000
2026-08-18 2026-08-14 PlS Planned sale
Esaka Fumihide

Chief Executive Officer

Executive Director
1,000 -0.3%
63.29
US$100,000 		1,000 -0.3% 63.29 US$100,000
2026-08-14 2026-08-14 PrS Proposed sale
FUMIHIDE ESAKA

Director; Officer

Executive Director
45,500
64.34
US$2,927,470 		45,500 64.34 US$2,927,470
2026-08-14 2026-08-14 PrS Proposed sale
1.3
SCOTT HANSON

Director; Officer

Executive Director
21,000
64.34
US$1,351,140 		21,000 64.34 US$1,351,140
2026-05-29 2026-05-27 S Sale
Chen Timothy
Non-Executive Director
3,264 -100.0%
81.57
US$266,244 		3,264 -100.0% 81.57 US$266,244
2026-05-29 2026-05-27 S Sale
Chen Timothy
Non-Executive Director
20,666 -86.4%
80.61
US$1,665,886 		20,666 -86.4% 80.61 US$1,665,886
2026-05-29 2026-05-27 S Sale
Chen Timothy
Non-Executive Director
24,248 -50.3%
79.72
US$1,933,051 		24,248 -50.3% 79.72 US$1,933,051
2026-05-29 2026-05-27 S Sale
Chen Timothy
Non-Executive Director
22,414 -31.8%
78.85
US$1,767,344 		22,414 -31.8% 78.85 US$1,767,344
2026-05-27 2026-05-27 PrS Proposed sale
Triumph Way Investment Inc

Director

Non-Executive Director
70,592
79.99
US$5,646,654 		70,592 79.99 US$5,646,654
2026-05-18 2026-05-15 S Sale
Chen Sean Chihhsiang

President and COO

Officer
23,334 -16.2%
71.37
US$1,665,455 		23,334 -16.2% 71.37 US$1,665,455
2026-05-18 2026-05-15 S Sale
Chen Sean Chihhsiang

President and COO

Officer
32,351 -18.4%
70.53
US$2,281,826 		32,351 -18.4% 70.53 US$2,281,826
2026-05-15 2026-05-15 PrS Proposed sale
SEAN CHEN

Officer

Officer
55,685
70.89
US$3,947,281 		55,685 70.89 US$3,947,281
2026-05-18 2026-05-14 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
200 -0.1%
70.50
US$14,100 		200 -0.1% 70.50 US$14,100
2026-05-18 2026-05-14 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
6,100 -2.9%
69.59
US$424,521 		6,100 -2.9% 69.59 US$424,521
2026-05-18 2026-05-14 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
3,900 -1.8%
68.62
US$267,631 		3,900 -1.8% 68.62 US$267,631
2026-05-18 2026-05-14 S Sale
2.6
Winzeler Jeffrey G

Chief Financial Officer

Officer
82 -0.1%
70.65
US$5,793 		82 -0.1% 70.65 US$5,793
2026-05-18 2026-05-14 S Sale
2.6
Winzeler Jeffrey G

Chief Financial Officer

Officer
25,918 -21.5%
69.90
US$1,811,619 		25,918 -21.5% 69.90 US$1,811,619
2026-05-18 2026-05-14 S Sale
Esaka Fumihide

Chief Executive Officer

Executive Director
60,000 -13.3%
70.02
US$4,201,122 		60,000 -13.3% 70.02 US$4,201,122
2026-05-14 2026-05-14 PrS Proposed sale
2.6
JEFF G WINZELER

Officer

Officer
26,000
69.90
US$1,817,410 		26,000 69.90 US$1,817,410
2026-05-14 2026-05-14 PrS Proposed sale
1.3
SCOTT HANSON

Officer

Officer
10,200
69.24
US$706,252 		10,200 69.24 US$706,252
2026-05-14 2026-05-14 PrS Proposed sale
FUMIHIDE ESAKA

Officer

Officer
60,000
70.02
US$4,201,122 		60,000 70.02 US$4,201,122
2026-04-06 2026-04-02 S Sale
0.5
Connors Michele Kim

General Counsel

Officer
151 -0.2%
26.65
US$4,024 		151 -0.2% 26.65 US$4,024
2026-04-06 2026-04-02 S Sale
0.5
Connors Michele Kim

General Counsel

Officer
660 -1.1%
26.04
US$17,185 		660 -1.1% 26.04 US$17,185
2026-01-28 2026-01-26 S Sale
1.3
Hanson Scott McLean

Chief Technology Officer

Executive Director
10,000 -7.5%
31.00
US$310,000 		10,000 -7.5% 31.00 US$310,000
2026-01-28 2026-01-26 S Sale
0.7
TAUTGES JOSEPH A
Non-Executive Director
7,800 -13.8%
31.00
US$241,800 		7,800 -13.8% 31.00 US$241,800
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