Who
Sean Chihhsiang Chen
President and COO
Company insider
Files Form 4 as: President and COO, Ambiq Micro.
In numbers
- Trades disclosed
- 45
- Buys
- 0
- Sells
- 6
- Bought
- $0
- Sold
- $13.1M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 2 Oct 2025
- Last trade
- 14 Oct 2026
- Last filed
- 16 Oct 2026
Companies traded
Activity over time
1 May – 1 Oct
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Code M | $122K15,000 at $8.12 | filing |
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $378K7,539 at $50.13 | filing |
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $65K1,261 at $51.53 | filing |
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $105K2,000 at $52.47 | filing |
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $214K4,000 at $53.44 | filing |
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $11K200 at $54.27 | filing |
| 14 Oct 2026filed 16 Oct 2026 | AMBQ Ambiq Microoption or derivative · Semiconductors | SEC FORM 4 Code M | —15,000 at $0.00 | filing |
| 5 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $366K5,508 at $66.38 | filing |
| 5 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $121K1,797 at $67.29 | filing |
| 5 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $54K800 at $68.08 | filing |
| 5 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $6,951100 at $69.51 | filing |
| 2 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $172K2,492 at $69.11 | filing |
| 2 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $210K3,008 at $69.77 | filing |
| 2 Oct 2026filed 6 Oct 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $22K302 at $71.86 | filing |
| 14 Sep 2026filed 15 Sep 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Code M | $122K15,000 at $8.12 | filing |
| 14 Sep 2026filed 15 Sep 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $154K2,600 at $59.36 | filing |
| 14 Sep 2026filed 15 Sep 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $663K11,000 at $60.24 | filing |
| 14 Sep 2026filed 15 Sep 2026 | AMBQ Ambiq Microoption or derivative · Semiconductors | SEC FORM 4 Code M | —15,000 at $0.00 | filing |
| 14 Sep 2026filed 15 Sep 2026 | AMBQ Ambiq MicroSemiconductors | SEC FORM 4 Sold | $85K1,400 at $60.83 | filing |
| 14 Sep 2026filed 15 Sep 2026 | AMBQ Ambiq Microoption or derivative · Semiconductors | SEC FORM 4 Code M | —15,000 at $0.00 | filing |
News
Sean Chihhsiang Chen Sells 15,000 Shares of Ambiq Micro (NYSE:AMBQ) Stocktickerreport.com · 10 Sep 2026Ambiq Micro (NYSE:AMBQ) & Mobix Labs (NASDAQ:MOBX) Head-To-Head SurveyAMBQ · dailypolitical.com · 25 Oct 2026Ambiq Micro (NYSE:AMBQ) versus Enphase Energy (NASDAQ:ENPH) Critical ContrastAMBQ · themarketsdaily.com · 22 Oct 2026Onto Innovation (NYSE:ONTO) & Ambiq Micro (NYSE:AMBQ) Critical ReviewAMBQ · dailypolitical.com · 13 Oct 2026
1 headline in the last 90 days name Sean Chihhsiang Chen; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.