Insider Transactions in Q4 2025 at Amphastar Pharmaceuticals, Inc. (AMPH)
Insider Transaction List (Q4 2025)
| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Dec 17
2025
|
Rong Zhou SENIOR EVP, PRODUCTION CENTER |
SELL
Open market or private sale
|
Direct |
9,787
-6.62%
|
$254,462
$26.2 P/Share
|
|
Dec 17
2025
|
Rong Zhou SENIOR EVP, PRODUCTION CENTER |
BUY
Exercise of conversion of derivative security
|
Direct |
9,787
+6.21%
|
$107,657
$11.33 P/Share
|
|
Dec 12
2025
|
Floyd F. Petersen |
SELL
Open market or private sale
|
Direct |
2,426
-3.29%
|
$60,650
$25.92 P/Share
|
|
Dec 11
2025
|
Floyd F. Petersen |
SELL
Open market or private sale
|
Direct |
1,737
-2.3%
|
$43,425
$25.69 P/Share
|
|
Nov 25
2025
|
Richard K Prins |
SELL
Open market or private sale
|
Direct |
4,179
-10.62%
|
$112,833
$27.1 P/Share
|
|
Nov 25
2025
|
Richard K Prins |
BUY
Exercise of conversion of derivative security
|
Direct |
4,179
+9.6%
|
$66,864
$16.69 P/Share
|
|
Nov 13
2025
|
Floyd F. Petersen |
SELL
Open market or private sale
|
Direct |
16,679
-18.09%
|
$433,654
$26.49 P/Share
|
|
Nov 13
2025
|
Floyd F. Petersen |
BUY
Exercise of conversion of derivative security
|
Direct |
16,679
+15.32%
|
$266,864
$16.69 P/Share
|
|
Nov 03
2025
|
Floyd F. Petersen |
SELL
Open market or private sale
|
Direct |
500
-0.66%
|
$12,500
$25.27 P/Share
|
|
Oct 01
2025
|
Floyd F. Petersen |
SELL
Open market or private sale
|
Direct |
500
-0.65%
|
$13,500
$27.2 P/Share
|