CHEN SEAN CHIHHSIANG (President and COO) sold 11.1% of their position (15K shares) of AMBIQ MICRO, INC. on the open market
Open‑market sale worth $857.6K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 2 sales
Filed: 9/9/2026ACC: 0002078559-26-000008
Officer· President and COO
Since Mar 2026
-15K
Net shares
Net seller
$857.6K
Total sold
2
Open market trades
0B · 2S
4
Total transactions
15K acquired · 30K disposed
Non-Derivative Transactions3
Common Stock
Direct
Shares
+15K
Price / share
$8.12
Trade value
$121.80K
% of position
12.5%
9/4/2026
120.28K→135.28K
Common Stock
Direct
Shares
−12.87K
Price / share
$57.09
Trade value
$734.93K
% of position
9.5%
9/4/2026
135.28K→122.40K
Common Stock
Direct
Shares
−2.13K
Price / share
$57.68
Trade value
$122.62K
% of position
1.7%
9/4/2026
122.40K→120.28K
Total
Net shares
+0.00
Net value
-$735.76K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 9/4/2026 | M · Option Exercise | +15K | $8.12 | $121.80K | 12.5% | 120.28K | 135.28K |
| Common Stock Direct | 9/4/2026 | S · Sale | −12.87K | $57.09 | $734.93K | 9.5% | 135.28K | 122.40K |
| Common Stock Direct | 9/4/2026 | S · Sale | −2.13K | $57.68 | $122.62K | 1.7% | 122.40K | 120.28K |
| Total | +0.00 | -$735.76K | ||||||
Derivative Transactions1
Stock Option (Right to Buy)
Direct
Converts to
Common Stock
15K shares
Shares
−15K
Strike price
8.12
Held after
149.42K
Exercisable
—
9/4/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy) Direct | Common Stock15K shares | 9/4/2026 | M · Option Exercise | −15K | 8.12 | — | 149.42K |