PRINS RICHARD K sold 10.6% of their position (4.18K shares) of AMPHASTAR PHARMACEUTICALS, INC. on the open market
Open‑market sale worth $113.3K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 11/25/2025ACC: 0001047579-25-000006
Director
Since Aug 2018
-4.18K
Net shares
Net seller
$113.3K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
4.18K acquired · 8.36K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+4.18K
Price / share
$16.69
Trade value
$69.75K
% of position
11.9%
11/25/2025
35.18K→39.36K
Common Stock
Direct
Shares
−4.18K
Price / share
$27.10
Trade value
$113.25K
% of position
10.6%
11/25/2025
39.36K→35.18K
Total
Net shares
+0.00
Net value
-$43.51K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 11/25/2025 | M · Option Exercise | +4.18K | $16.69 | $69.75K | 11.9% | 35.18K | 39.36K |
| Common Stock Direct | 11/25/2025 | S · Sale | −4.18K | $27.10 | $113.25K | 10.6% | 39.36K | 35.18K |
| Total | +0.00 | -$43.51K | ||||||
Derivative Transactions1
Stock Option (right to buy)
Direct
Converts to
Common Stock
4.18K shares
Shares
−4.18K
Strike price
16.69
Held after
0.00
Exercisable
—
11/25/2025
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option (right to buy) Direct | Common Stock4.18K shares | 11/25/2025 | M · Option Exercise | −4.18K | 16.69 | — | 0.00 |