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 $902.1K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 9/15/2026ACC: 0002078559-26-000010
Officer· President and COO
Since Mar 2026
-15K
Net shares
Net seller
$902.1K
Total sold
3
Open market trades
0B · 3S
5
Total transactions
15K acquired · 30K disposed
Non-Derivative Transactions4
Common Stock
Direct
Shares
+15K
Price / share
$8.12
Trade value
$121.80K
% of position
12.5%
9/14/2026
120.28K→135.28K
Common Stock
Direct
Shares
−2.60K
Price / share
$59.36
Trade value
$154.35K
% of position
1.9%
9/14/2026
135.28K→132.68K
Common Stock
Direct
Shares
−11K
Price / share
$60.24
Trade value
$662.62K
% of position
8.3%
9/14/2026
132.68K→121.67K
Common Stock
Direct
Shares
−1.40K
Price / share
$60.83
Trade value
$85.17K
% of position
1.2%
9/14/2026
121.67K→120.28K
Total
Net shares
+0.00
Net value
-$780.33K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 9/14/2026 | M · Option Exercise | +15K | $8.12 | $121.80K | 12.5% | 120.28K | 135.28K |
| Common Stock Direct | 9/14/2026 | S · Sale | −2.60K | $59.36 | $154.35K | 1.9% | 135.28K | 132.68K |
| Common Stock Direct | 9/14/2026 | S · Sale | −11K | $60.24 | $662.62K | 8.3% | 132.68K | 121.67K |
| Common Stock Direct | 9/14/2026 | S · Sale | −1.40K | $60.83 | $85.17K | 1.2% | 121.67K | 120.28K |
| Total | +0.00 | -$780.33K | ||||||
Derivative Transactions1
Stock Option (Right to Buy)
Direct
Converts to
Common Stock
15K shares
Shares
−15K
Strike price
8.12
Held after
134.42K
Exercisable
—
9/14/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy) Direct | Common Stock15K shares | 9/14/2026 | M · Option Exercise | −15K | 8.12 | — | 134.42K |