PETERS WILLIAM J (CFO, EVP & TREASURER) sold 4.5% of their position (8.18K shares) of AMPHASTAR PHARMACEUTICALS, INC. on the open market
Open‑market sale worth $183.9K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 8/11/2026ACC: 0001263136-26-000012
DirectorOfficer· CFO, EVP & TREASURER
Since Mar 2026
-8.18K
Net shares
Net seller
$183.9K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
5.05K acquired · 13.23K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+5.05K
Price / share
$19.79
Trade value
$100K
% of position
2.9%
8/7/2026
175.97K→181.03K
Common Stock
Direct
Shares
−8.18K
Price / share
$22.48
Trade value
$183.89K
% of position
4.5%
8/7/2026
181.03K→172.85K
Total
Net shares
−3.13K
Net value
-$83.89K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 8/7/2026 | M · Option Exercise | +5.05K | $19.79 | $100K | 2.9% | 175.97K | 181.03K |
| Common Stock Direct | 8/7/2026 | S · Sale | −8.18K | $22.48 | $183.89K | 4.5% | 181.03K | 172.85K |
| Total | −3.13K | -$83.89K | ||||||
Derivative Transactions1
Employee Stock Option (right to buy)
Direct
Converts to
Common Stock
5.05K shares
Shares
−5.05K
Strike price
19.79
Held after
0.00
Exercisable
—
8/7/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Employee Stock Option (right to buy) Direct | Common Stock5.05K shares | 8/7/2026 | M · Option Exercise | −5.05K | 19.79 | — | 0.00 |