CHEN SEAN CHIHHSIANG (President and COO) sold 31.6% of their position (55.69K shares) of AMBIQ MICRO, INC. on the open market
Open‑market sale worth $3.95M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 2 sales
Filed: 5/18/2026ACC: 0002078559-26-000006
Officer· President and COO
Since Mar 2026
-55.69K
Net shares
Net seller
$3.95M
Total sold
2
Open market trades
0B · 2S
4
Total transactions
55.69K acquired · 111.37K disposed
Non-Derivative Transactions3
Common Stock
Direct
Shares
+55.69K
Price / share
$5.88
Trade value
$327.43K
% of position
46.3%
5/15/2026
120.28K→175.96K
Common Stock
Direct
Shares
−32.35K
Price / share
$70.53
Trade value
$2.28M
% of position
18.4%
5/15/2026
175.96K→143.61K
Common Stock
Direct
Shares
−23.33K
Price / share
$71.37
Trade value
$1.67M
% of position
16.2%
5/15/2026
143.61K→120.28K
Total
Net shares
+0.00
Net value
-$3.62M
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 5/15/2026 | M · Option Exercise | +55.69K | $5.88 | $327.43K | 46.3% | 120.28K | 175.96K |
| Common Stock Direct | 5/15/2026 | S · Sale | −32.35K | $70.53 | $2.28M | 18.4% | 175.96K | 143.61K |
| Common Stock Direct | 5/15/2026 | S · Sale | −23.33K | $71.37 | $1.67M | 16.2% | 143.61K | 120.28K |
| Total | +0.00 | -$3.62M | ||||||
Derivative Transactions1
Stock Option (Right to Buy)
Direct
Converts to
Common Stock
55.69K shares
Shares
−55.69K
Strike price
5.88
Held after
1.00
Exercisable
—
5/15/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy) Direct | Common Stock55.69K shares | 5/15/2026 | M · Option Exercise | −55.69K | 5.88 | — | 1.00 |