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Who

Jeffrey G. Winzeler

Chief Financial Officer

Company insider

Files Form 4 as: Chief Financial Officer, Ambiq Micro; Chief Financial Officer, Everspin Technologies; Chief financial Officer, Solar Power; Chief Operating Officer, International Displayworks.

In numbers

Trades disclosed
48
Buys
0
Sells
7
Bought
$0
Sold
$4.4M
Companies
4
Companies where not an officer
0
First trade
27 Jan 2006
Last trade
2 Oct 2026
Last filed
6 Oct 2026

Companies traded

Where they are an officer
AMBQ Ambiq MicroOfficer · Semiconductors · last 2 Oct 20260 buys · 2 sells
MRAM Everspin TechnologiesOfficer · Semiconductors · last 13 Mar 20190 buys · 1 sell
Solar PowerOfficer, 10% owner · last 1 Apr 20110 buys · 1 sell
International DisplayworksOfficer · last 30 Nov 20060 buys · 3 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
10Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
2 Oct 2026filed 6 Oct 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$162K2,343 at $69.11filing
2 Oct 2026filed 6 Oct 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$197K2,828 at $69.77filing
2 Oct 2026filed 6 Oct 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$20K284 at $71.86filing
2 Jun 2026filed 4 Jun 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code M$100K5,952 at $16.80filing
2 Jun 2026filed 4 Jun 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code M—5,952 at $0.00filing
2 Jun 2026filed 4 Jun 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code M—5,952 at $0.00filing
2 Jun 2026filed 4 Jun 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code M$100K5,952 at $16.80filing
15 May 2026filed 18 May 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code M—5,952 at $0.00filing
15 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code M$100K5,952 at $16.80filing
15 May 2026filed 18 May 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code M—5,952 at $0.00filing
15 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code M$100K5,952 at $16.80filing
14 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code M$437K26,000 at $16.80filing
14 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.8M25,918 at $69.90filing
14 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$5,79382 at $70.65filing
14 May 2026filed 18 May 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code M—26,000 at $0.00filing
14 May 2026filed 18 May 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code M—26,000 at $0.00filing
14 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code M$437K26,000 at $16.80filing
14 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.8M25,918 at $69.90filing
14 May 2026filed 18 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$5,79382 at $70.65filing
6 Mar 2026filed 2 Apr 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code A—41,728 at $0.00filing

Sectors

Technology3
Not placed4

Buys in green, sells in red, by the company’s sector.

Related people

Fumihide EsakaChief Executive Officer · Chief Executive Officer at Ambiq Micro, filing Form 4 there in the last year
Sean Chihhsiang ChenPresident and COO · President and COO at Ambiq Micro, filing Form 4 there in the last year
Scott McLean HansonChief Technology Officer · Chief Technology Officer at Ambiq Micro, filing Form 4 there in the last year
Sanjeev AggarwalPresident and CEO · President and CEO at Everspin Technologies, filing Form 4 there in the last year
Sean Michael DoughertyVice President, Sales · Vice President, Sales at Everspin Technologies, filing Form 4 there in the last year
William Earl CooperChief Financial Officer · Also traded MRAM in the last 90 days
Ker ZhangDirector · Also traded AMBQ in the last 90 days