InsiderSource
AMBQ

Ambiq Micro, Inc.

SEC CIK 1500412
$84.72 +187.2% · 90 days
90-day buys
$0
0 open-market
90-day sells
$16.33M
14 open-market
Net insider flow
−$16.33M
Net selling
Filings shown
41
Most recent
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At a glance

Over the last 90 days, insiders at AMBQ have sold a net $16.33M of stock (0 open-market buys vs 14 sells).

Largest recent trade: Esaka Fumihide sold $4.2M of AMBQ, trimming their stake 13%.

Most active filer: Hanson Scott Mclean, with 8 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for AMBQ, newest first
View on SEC EDGAR ↗
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AMBQ
Ambiq Micro, Inc.
Sell Chen Timothy · Director · Open-market sale · filed 2w ago ΔOwn −32%

Chen Timothy sold $1.77M of AMBQ, trimming their stake 32%.

−$1.77M
22,414 sh @ $79
AMBQ
Ambiq Micro, Inc.
Sell Chen Timothy · Director · Open-market sale · filed 2w ago ΔOwn −50%

Chen Timothy sold $1.93M of AMBQ, trimming their stake 50%.

−$1.93M
24,248 sh @ $80
AMBQ
Ambiq Micro, Inc.
Sell Chen Timothy · Director · Open-market sale · filed 2w ago ΔOwn −86%

Chen Timothy sold $1.67M of AMBQ, trimming their stake 86%.

−$1.67M
20,666 sh @ $81
AMBQ
Ambiq Micro, Inc.
Sell Chen Timothy · Director · Open-market sale · filed 2w ago ΔOwn −100%

Chen Timothy sold $266.2K of AMBQ, trimming their stake 100%.

−$266.2K
3,264 sh @ $82
AMBQ
Ambiq Micro, Inc.
Sell Chen Sean Chihhsiang · President and COO · Open-market sale · filed 3w ago ΔOwn −18%

Chen Sean Chihhsiang sold $2.28M of AMBQ, trimming their stake 18%.

−$2.28M
32,351 sh @ $71
AMBQ
Ambiq Micro, Inc.
Sell Chen Sean Chihhsiang · President and COO · Open-market sale · filed 3w ago ΔOwn −16%

Chen Sean Chihhsiang sold $1.67M of AMBQ, trimming their stake 16%.

−$1.67M
23,334 sh @ $71
AMBQ
Ambiq Micro, Inc.
Option exercise Esaka Fumihide · Director, Chief Executive Officer · Option exercise · filed 3w ago ΔOwn +12%
+$369.2K
45,463 sh @ $8
AMBQ
Ambiq Micro, Inc.
Option exercise Esaka Fumihide · Director, Chief Executive Officer · Option exercise · filed 3w ago ΔOwn +3.3%
+$183.2K
14,537 sh @ $13
AMBQ
Ambiq Micro, Inc.
Sell Winzeler Jeffrey G · Chief Financial Officer · Open-market sale · filed 3w ago ΔOwn −22%

Winzeler Jeffrey G sold $1.81M of AMBQ, trimming their stake 22%.

−$1.81M
25,918 sh @ $70
AMBQ
Ambiq Micro, Inc.
Sell Winzeler Jeffrey G · Chief Financial Officer · Open-market sale · filed 3w ago ΔOwn −0.1%

Winzeler Jeffrey G sold $5.8K of AMBQ.

−$5.8K
82 sh @ $71
AMBQ
Ambiq Micro, Inc.
Sell Hanson Scott McLean · Director, Chief Technology Officer · Open-market sale · filed 3w ago ΔOwn −1.8%

Hanson Scott Mclean sold $267.6K of AMBQ, trimming their stake 2%.

−$267.6K
3,900 sh @ $69
AMBQ
Ambiq Micro, Inc.
Sell Hanson Scott McLean · Director, Chief Technology Officer · Open-market sale · filed 3w ago ΔOwn −2.9%

Hanson Scott Mclean sold $424.5K of AMBQ, trimming their stake 3%.

−$424.5K
6,100 sh @ $70
AMBQ
Ambiq Micro, Inc.
Sell Hanson Scott McLean · Director, Chief Technology Officer · Open-market sale · filed 3w ago ΔOwn −0.1%

Hanson Scott Mclean sold $14.1K of AMBQ.

−$14.1K
200 sh @ $71
AMBQ
Ambiq Micro, Inc.
Option exercise Esaka Fumihide · Director, Chief Executive Officer · Option exercise · filed 3w ago ΔOwn +15%
+$487.2K
60,000 sh @ $8
AMBQ
Ambiq Micro, Inc.
Sell Esaka Fumihide · Director, Chief Executive Officer · Open-market sale · filed 3w ago ΔOwn −13%

Esaka Fumihide sold $4.2M of AMBQ, trimming their stake 13%.

−$4.2M
60,000 sh @ $70
AMBQ
Ambiq Micro, Inc.
Sell Connors Michele Kim · General Counsel · Open-market sale · filed Apr 6, 2026 ΔOwn −1.1%

Connors Michele Kim sold $17.2K of AMBQ, trimming their stake 1%.

−$17.2K
660 sh @ $26
AMBQ
Ambiq Micro, Inc.
Sell Connors Michele Kim · General Counsel · Open-market sale · filed Apr 6, 2026 ΔOwn −0.2%

Connors Michele Kim sold $4K of AMBQ.

−$4K
151 sh @ $27
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About AMBQ insider activity

This page tracks every recent Form 4 filed for Ambiq Micro, Inc. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is AMBQ insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for Ambiq Micro, Inc. usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.