ZHOU RONG (SENIOR EVP, PRODUCTION CENTER) sold 5.6% of their position (10K shares) of AMPHASTAR PHARMACEUTICALS, INC. on the open market
Open‑market sale worth $239.4K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 9/17/2026ACC: 0001645326-26-000014
Officer· SENIOR EVP, PRODUCTION CENTER
Since Mar 2026
-10K
Net shares
Net seller
$239.4K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
10K acquired · 20K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+10K
Price / share
$13.35
Trade value
$133.50K
% of position
5.9%
9/16/2026
169.20K→179.20K
Common Stock
Direct
Shares
−10K
Price / share
$23.94
Trade value
$239.40K
% of position
5.6%
9/16/2026
179.20K→169.20K
Total
Net shares
+0.00
Net value
-$105.90K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 9/16/2026 | M · Option Exercise | +10K | $13.35 | $133.50K | 5.9% | 169.20K | 179.20K |
| Common Stock Direct | 9/16/2026 | S · Sale | −10K | $23.94 | $239.40K | 5.6% | 179.20K | 169.20K |
| Total | +0.00 | -$105.90K | ||||||
Derivative Transactions1
Employee Stock Option (right to buy)
Direct
Converts to
Common Stock
10K shares
Shares
−10K
Strike price
13.35
Held after
19.42K
Exercisable
—
9/16/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Employee Stock Option (right to buy) Direct | Common Stock10K shares | 9/16/2026 | M · Option Exercise | −10K | 13.35 | — | 19.42K |
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