ZHOU RONG (SENIOR EVP, PRODUCTION CENTER) sold 6.6% of their position (9.79K shares) of AMPHASTAR PHARMACEUTICALS, INC. on the open market
Open‑market sale worth $256.4K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 12/18/2025ACC: 0001645326-25-000004
Officer· SENIOR EVP, PRODUCTION CENTER
Since Mar 2026
-9.79K
Net shares
Net seller
$256.4K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
9.79K acquired · 19.57K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+9.79K
Price / share
$11.33
Trade value
$110.89K
% of position
7.1%
12/17/2025
138.04K→147.83K
Common Stock
Direct
Shares
−9.79K
Price / share
$26.20
Trade value
$256.38K
% of position
6.6%
12/17/2025
147.83K→138.04K
Total
Net shares
+0.00
Net value
-$145.49K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 12/17/2025 | M · Option Exercise | +9.79K | $11.33 | $110.89K | 7.1% | 138.04K | 147.83K |
| Common Stock Direct | 12/17/2025 | S · Sale | −9.79K | $26.20 | $256.38K | 6.6% | 147.83K | 138.04K |
| Total | +0.00 | -$145.49K | ||||||
Derivative Transactions1
Employee Stock Option (right to buy)
Direct
Converts to
Common Stock
9.79K shares
Shares
−9.79K
Strike price
11.33
Held after
0.00
Exercisable
—
12/17/2025
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Employee Stock Option (right to buy) Direct | Common Stock9.79K shares | 12/17/2025 | M · Option Exercise | −9.79K | 11.33 | — | 0.00 |
Non-Derivative Holdings (Post-Transaction)2
Common Stock
IndirectShares owned5K
Common Stock
IndirectShares owned99.67K
Total
104.67K indirect104.67K
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Common Stock | 5K | Indirect |
| Common Stock | 99.67K | Indirect |
| Total | 104.67K | 104.67K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported