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Who

Timothy Chen

Director

Company insider

Files Form 4 as: Director, Ambiq Micro.

Every Form 4 they filed

In numbers

Trades disclosed
15
Buys
0
Sells
1
Bought
$0
Sold
$11.3M
Companies
1
Companies where not an officer
1
First trade
29 Jul 2025
Last trade
8 Jun 2026
Last filed
10 Jun 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
AMBQ Ambiq MicroDirector · Semiconductors · last 8 Jun 20260 buys · 1 sell

Activity over time

1 May – 1 Oct
10May 26Jun 26Aug 26Sep 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
8 Jun 2026filed 10 Jun 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code A—4,957 at $0.00filing
8 Jun 2026filed 10 Jun 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code A—4,957 at $0.00filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.8M22,414 at $78.85filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.9M24,248 at $79.72filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.7M20,666 at $80.61filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$266K3,264 at $81.57filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.8M22,414 at $78.85filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.9M24,248 at $79.72filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$1.7M20,666 at $80.61filing
27 May 2026filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Sold$266K3,264 at $81.57filing
31 Jul 2025filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code C—70,592filing
31 Jul 2025filed 29 May 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code C—1,707,853 at $0.00filing
31 Jul 2025filed 29 May 2026AMBQ Ambiq Microoption or derivative · SemiconductorsSEC FORM 4 Code C—1,707,853 at $0.00filing
31 Jul 2025filed 29 May 2026AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code C—70,592filing
29 Jul 2025filed 31 Jul 2025AMBQ Ambiq MicroSemiconductorsSEC FORM 4 Code A—47,618 at $0.00filing

News

Onto Innovation (NYSE:ONTO) & Ambiq Micro (NYSE:AMBQ) Critical ReviewAMBQ · dailypolitical.com · 13 Oct 2026Insider Selling: Ambiq Micro (NYSE:AMBQ) CTO Sells $604,128.00 in StockAMBQ · themarketsdaily.com · 9 Oct 2026

0 headlines in the last 90 days name Timothy Chen; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Technology1

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

Related people

Scott McLean HansonChief Technology Officer · Chief Technology Officer at Ambiq Micro, filing Form 4 there in the last year
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
Jeffrey G. WinzelerChief Financial Officer · Chief Financial Officer at Ambiq Micro, filing Form 4 there in the last year
Ker ZhangDirector · Director at Ambiq Micro, filing Form 4 there in the last year