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SEC Form 4 research

Ambiq Micro, Inc. insider transactions

Inspect Ambiq Micro, Inc.'s public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-15T08:02:39.132Z

Issuer CIK
0001500412
Reporting owners
12
Officers and directors
7
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Read one actual disclosure before using it

Show the table · 1 row, 7 columns

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2026-10-072026-10-02Winzeler Jeffrey GS284$71.86Not reported

First displayed source row from Recent insider disclosures. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-02 and its public availability date is 2026-10-07. Subtracting those calendar dates gives 5 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC accession 0001312143-26-000013 ↗SEC accession 0001312143-26-000013 ↗SEC accession 0001312143-26-000013 ↗

Recent insider disclosures

Inspect all 50 displayed rows: Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Scroll sideways to compare all columns. Select a heading to sort.

2026-10-072026-10-02Winzeler Jeffrey GS284$71.86Not reported
2026-10-072026-10-02Winzeler Jeffrey GS2,828$69.77Not reported
2026-10-072026-10-02Winzeler Jeffrey GS2,343$69.11Not reported
2026-10-062026-10-02Esaka FumihideS862$71.86Not reported
2026-10-062026-10-02Esaka FumihideS8,585$69.77Not reported
2026-10-062026-10-02Esaka FumihideS7,113$69.11Not reported
2026-10-062026-10-02Hanson Scott McLeanS452$71.86Not reported
2026-10-062026-10-02Hanson Scott McLeanS4,500$69.77Not reported
2026-10-062026-10-02Hanson Scott McLeanS3,728$69.11Not reported
2026-10-062026-10-05Chen Sean ChihhsiangS100$69.51Not reported
2026-10-062026-10-05Chen Sean ChihhsiangS800$68.08Not reported
2026-10-062026-10-05Chen Sean ChihhsiangS1,797$67.29Not reported
2026-10-062026-10-05Chen Sean ChihhsiangS5,508$66.38Not reported
2026-10-062026-10-02Chen Sean ChihhsiangS302$71.86Not reported
2026-10-062026-10-02Chen Sean ChihhsiangS3,008$69.77Not reported
2026-10-062026-10-02Chen Sean ChihhsiangS2,492$69.11Not reported
2026-09-172026-09-15Hanson Scott McLeanS100$61Not reported
2026-09-172026-09-15Hanson Scott McLeanS4,947$60.56Not reported
2026-09-172026-09-15Hanson Scott McLeanS1,953$59.53Not reported
2026-09-152026-09-11ZHANG KERS900$63.95Not reported
2026-09-152026-09-11ZHANG KERS9,100$63.39Not reported
2026-09-152026-09-14Chen Sean ChihhsiangS1,400$60.83Not reported
2026-09-152026-09-14Chen Sean ChihhsiangS11,000$60.24Not reported
2026-09-152026-09-14Chen Sean ChihhsiangS2,600$59.36Not reported
2026-09-152026-09-15Esaka FumihideS100$61Not reported
2026-09-152026-09-15Esaka FumihideS9,615$60.55Not reported
2026-09-152026-09-15Esaka FumihideS3,785$59.56Not reported
2026-09-152026-09-11Esaka FumihideS7,917$63.86Not reported
2026-09-152026-09-11Esaka FumihideS42,083$63.27Not reported
2026-09-092026-09-04Chen Sean ChihhsiangS2,126$57.68Not reported
2026-09-092026-09-04Chen Sean ChihhsiangS12,874$57.09Not reported
2026-09-092026-09-04ZHANG KERS185$56.92Not reported
2026-09-032026-09-02Esaka FumihideS9,575$56.77Not reported
2026-09-032026-09-02Esaka FumihideS1,452$56.15Not reported
2026-09-032026-09-01Esaka FumihideS48,973$56.39Not reported
2026-09-032026-08-31Esaka FumihideS5,600$58.46Not reported
2026-09-032026-08-31Esaka FumihideS13,800$57.7Not reported
2026-09-032026-08-31Esaka FumihideS15,600$56.81Not reported
2026-09-032026-08-31Esaka FumihideS2,100$58.52Not reported
2026-09-032026-08-31Esaka FumihideS5,501$57.75Not reported
2026-09-032026-08-31Esaka FumihideS5,899$56.87Not reported
2026-08-292026-08-27Hanson Scott McLeanS4,910$60.32Not reported
2026-08-292026-08-27Hanson Scott McLeanS22,590$59.69Not reported
2026-08-292026-08-26Hanson Scott McLeanS27,500$59.58Not reported
2026-08-192026-08-14Esaka FumihideS1,500$65.26Not reported
2026-08-192026-08-14Esaka FumihideS10,718$64.4Not reported
2026-08-192026-08-14Esaka FumihideS1,282$63.29Not reported
2026-08-192026-08-14Hanson Scott McLeanS800$65.3Not reported
2026-08-192026-08-14Hanson Scott McLeanS5,400$64.41Not reported
2026-08-192026-08-14Hanson Scott McLeanS800$63.26Not reported

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Show the table · 8 rows, 3 columns

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TAUTGES JOSEPH A00014822492
Chen Sean Chihhsiang000207855914
Chen Timothy00018180994
Connors Michele Kim00021041932
Esaka Fumihide000207845421
Hanson Scott McLean000207833916
Winzeler Jeffrey G000131214310
ZHANG KER00012668703
TAUTGES JOSEPH A ↗Chen Sean Chihhsiang ↗Chen Timothy ↗Connors Michele Kim ↗Esaka Fumihide ↗Hanson Scott McLean ↗Winzeler Jeffrey G ↗ZHANG KER ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

Strategy eligibility is held while filing coverage is unresolved.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.