Chen Sean Chihhsiang insider trades
Chen Sean Chihhsiang has filed 6 Form 4s with the SEC that we hold, all for Ambiq Micro, Inc. (AMBQ), as President and COO. Across all of them we count 0 purchases worth $0 and 14 sales worth $6.7M reported on Form 4. In the last 12 months: 0 purchases ($0) and 14 sales ($6.7M). The largest single trade was a sale of 32,351 shares of Ambiq Micro, Inc. worth $2.3M, dated 2026-05-15. Of 12 sales filed since we began reading the 10b5-1 checkbox, 12 (100%) were marked as made under a 10b5-1 trading plan. The first filing on our record is dated 2025-10-06 and the latest 2026-10-06.
Ambiq Micro, Inc. (AMBQ)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2026-05-15 | S, sale reported on Form 4 | 32,351 | $2.3M | 2026-05-18 |
| 2026-05-15 | S, sale reported on Form 4 | 23,334 | $1.7M | 2026-05-18 |
| 2026-09-04 | S, sale reported on Form 4 | 12,874 | $734.9K | 2026-09-09 |
| 2026-09-04 | S, sale reported on Form 4 | 2,126 | $122.6K | 2026-09-09 |
| 2026-09-14 | S, sale reported on Form 4 | 2,600 | $154.3K | 2026-09-15 |
| 2026-09-14 | S, sale reported on Form 4 | 11,000 | $662.6K | 2026-09-15 |
| 2026-09-14 | S, sale reported on Form 4 | 1,400 | $85.2K | 2026-09-15 |
| 2026-10-02 | S, sale reported on Form 4 | 2,492 | $172.2K | 2026-10-06 |
| 2026-10-02 | S, sale reported on Form 4 | 3,008 | $209.9K | 2026-10-06 |
| 2026-10-02 | S, sale reported on Form 4 | 302 | $21.7K | 2026-10-06 |
| 2026-10-05 | S, sale reported on Form 4 | 5,508 | $365.6K | 2026-10-06 |
| 2026-10-05 | S, sale reported on Form 4 | 1,797 | $120.9K | 2026-10-06 |
| 2026-10-05 | S, sale reported on Form 4 | 800 | $54.5K | 2026-10-06 |
| 2026-10-05 | S, sale reported on Form 4 | 100 | $7.0K | 2026-10-06 |
Counted from the Form 4 filings this reporting owner (SEC CIK 2078559) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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