Ambiq Micro, Inc. Insider Trading

AMBQ

Last 12 months

Insiders sold $38.9M and bought nothing on the open market.

41% of the selling was scheduled in advance under 10b5-1 plans. Director Timothy Chen sold $5.63M on May 27, 60% of their stake, outside a plan. No executive or director has bought shares on the open market in the last two years.

Net open-market

−$38.9M

0 buys · 25 sales

Under a 10b5-1 plan

41%

of the value sold

Insiders who bought / sold

0 / 8

executives and directors

Last open-market buy

None

in the last two years

Get an email when AMBQ's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 15	Scott McLean Hanson Chief Technology Officer	Sold10b5-1 plan 4 parts	7,000	$51.00 average	357K	3.2%	Form 4
Oct 15	Fumihide Esaka Chief Executive Officer	Sold10b5-1 plan 4 parts	5,000	$51.00 average	255K	1.1%	Form 4
Oct 14	Sean Chihhsiang Chen President and COO	Sold10b5-1 plan 5 parts	15,000	$51.50 average	772K	12%	Form 4
Oct 2 – 5	Sean Chihhsiang Chen President and COO	Sold10b5-1 plan 7 parts	14,007	$67.95 average	952K	12%	Form 4
Oct 2	Jeffrey G Winzeler Chief Financial Officer	SoldNo plan 3 parts	5,455	$69.60 average	380K	5.1%	Form 4
Oct 2	Fumihide Esaka Chief Executive Officer	SoldNo plan 3 parts	16,560	$69.60 average	$1.15M	3.6%	Form 4
Oct 2	Scott McLean Hanson Chief Technology Officer	SoldNo plan 3 parts	8,680	$69.60 average	604K	3.9%	Form 4
Sep 15	Scott McLean Hanson Chief Technology Officer	Sold10b5-1 plan 3 parts	7,000	$60.28 average	422K	3.1%	Form 4
Sep 11 – 15	Fumihide Esaka Chief Executive Officer	Sold10b5-1 plan 5 parts	63,500	$62.71 average	$3.98M	12%	Form 4
Sep 14	Sean Chihhsiang Chen President and COO	Sold10b5-1 plan 3 parts	15,000	$60.14 average	902K	11%	Form 4
Sep 11	Ker Zhang Director	SoldNo plan 2 parts	10,000	$63.44 average	634K	33%	Form 4
Sep 4	Sean Chihhsiang Chen President and COO	Sold10b5-1 plan 2 parts	15,000	$57.17 average	858K	11%	Form 4
Sep 4	Ker Zhang Director	SoldNo plan	185	$56.92	11K	0.6%	Form 4
Aug 31 – Sep 2	Fumihide Esaka Chief Executive Officer	Sold10b5-1 plan 9 parts	108,500	$56.89 average	$6.17M	19%	Form 4
Aug 26 – 27	Scott McLean Hanson Chief Technology Officer	SoldNo plan 3 parts	55,000	$59.69 average	$3.28M	20%	Form 4
Aug 14	Fumihide Esaka Chief Executive Officer	Sold10b5-1 plan 3 parts	13,500	$64.39 average	869K	2.9%	Form 4
Aug 14	Scott McLean Hanson Chief Technology Officer	Sold10b5-1 plan 3 parts	7,000	$64.38 average	451K	3.2%	Form 4
May 27	Timothy Chen Director	SoldNo plan 4 parts	70,592	$79.79 average	$5.63M	60%	Form 4
May 15	Sean Chihhsiang Chen President and COO	SoldNo plan 2 parts	55,685	$70.88 average	$3.95M	32%	Form 4
May 14	Fumihide Esaka Chief Executive Officer	SoldNo plan	60,000	$70.02	$4.2M	12%	Form 4
May 14	Scott McLean Hanson Chief Technology Officer	SoldNo plan 3 parts	10,200	$69.24 average	706K	4.6%	Form 4
May 14	Jeffrey G Winzeler Chief Financial Officer	SoldNo plan 2 parts	26,000	$69.90 average	$1.82M	21%	Form 4
Apr 2	Michele Kim Connors General Counsel	SoldNo plan 2 parts	811	$26.15 average	21K	1.3%	Form 4
Jan 26	Scott McLean Hanson Chief Technology Officer	SoldNo plan	10,000	$31.00	310K	7.5%	Form 4
Jan 26	Joseph A Tautges Director	SoldNo plan	7,800	$31.00	242K	14%	Form 4

Oct 1510b5-1 plan
Scott McLean Hanson
Chief Technology Officer · sold 7,000 at avg $51.00
357K
3.2% of stake
Oct 1510b5-1 plan
Fumihide Esaka
Chief Executive Officer · sold 5,000 at avg $51.00
255K
1.1% of stake
Oct 1410b5-1 plan
Sean Chihhsiang Chen
President and COO · sold 15,000 at avg $51.50
772K
12% of stake
Oct 2 – 510b5-1 plan
Sean Chihhsiang Chen
President and COO · sold 14,007 at avg $67.95
952K
12% of stake
Oct 2No plan
Jeffrey G Winzeler
Chief Financial Officer · sold 5,455 at avg $69.60
380K
5.1% of stake
Oct 2No plan
Fumihide Esaka
Chief Executive Officer · sold 16,560 at avg $69.60
$1.15M
3.6% of stake
Oct 2No plan
Scott McLean Hanson
Chief Technology Officer · sold 8,680 at avg $69.60
604K
3.9% of stake
Sep 1510b5-1 plan
Scott McLean Hanson
Chief Technology Officer · sold 7,000 at avg $60.28
422K
3.1% of stake
Sep 11 – 1510b5-1 plan
Fumihide Esaka
Chief Executive Officer · sold 63,500 at avg $62.71
$3.98M
12% of stake
Sep 1410b5-1 plan
Sean Chihhsiang Chen
President and COO · sold 15,000 at avg $60.14
902K
11% of stake
Sep 11No plan
Ker Zhang
Director · sold 10,000 at avg $63.44
634K
33% of stake
Sep 410b5-1 plan
Sean Chihhsiang Chen
President and COO · sold 15,000 at avg $57.17
858K
11% of stake
Sep 4No plan
Ker Zhang
Director · sold 185 at $56.92
11K
0.6% of stake
Aug 31 – Sep 210b5-1 plan
Fumihide Esaka
Chief Executive Officer · sold 108,500 at avg $56.89
$6.17M
19% of stake
Aug 26 – 27No plan
Scott McLean Hanson
Chief Technology Officer · sold 55,000 at avg $59.69
$3.28M
20% of stake
Aug 1410b5-1 plan
Fumihide Esaka
Chief Executive Officer · sold 13,500 at avg $64.39
869K
2.9% of stake
Aug 1410b5-1 plan
Scott McLean Hanson
Chief Technology Officer · sold 7,000 at avg $64.38
451K
3.2% of stake
May 27No plan
Timothy Chen
Director · sold 70,592 at avg $79.79
$5.63M
60% of stake
May 15No plan
Sean Chihhsiang Chen
President and COO · sold 55,685 at avg $70.88
$3.95M
32% of stake
May 14No plan
Fumihide Esaka
Chief Executive Officer · sold 60,000 at $70.02
$4.2M
12% of stake
May 14No plan
Scott McLean Hanson
Chief Technology Officer · sold 10,200 at avg $69.24
706K
4.6% of stake
May 14No plan
Jeffrey G Winzeler
Chief Financial Officer · sold 26,000 at avg $69.90
$1.82M
21% of stake
Apr 2No plan
Michele Kim Connors
General Counsel · sold 811 at avg $26.15
21K
1.3% of stake
Jan 26No plan
Scott McLean Hanson
Chief Technology Officer · sold 10,000 at $31.00
310K
7.5% of stake
Jan 26No plan
Joseph A Tautges
Director · sold 7,800 at $31.00
242K
14% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch AMBQ, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

AMBQ is in 30 US ETFs. The largest of them, with AMBQ's weight in each:

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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