AMPH
insider transactionsAmphastar Pharmaceuticals, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
No open-market buys or sells this period. The trades below are grants, option exercises and gifts, which carry no market price.
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Other·F
Director
$14.2K
769 sh · $18.45
Own -0%
-
Grant·A
Director
$0
17.4K sh
Own New
-
Grant·A
Director
$0
8.1K sh
Own +129%
-
Grant·A
Director
$0
17.4K sh
Own New
-
Grant·A
Director
$0
8.1K sh
Own +75%
-
Grant·A
Director
$0
17.4K sh
Own New
-
Grant·A
Director
$0
8.1K sh
Own +34%
-
Grant·A
Director
$0
17.4K sh
Own New
-
Grant·A
Director
$0
8.1K sh
Own +5%
-
Grant·A
Director
$0
17.4K sh
Own New
-
Grant·A
Director
$0
8.1K sh
Own +28%
-
Grant·A
Director
$0
17.4K sh
Own New
-
Grant·A
Director
$0
8.1K sh
Own +28%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 2, 2026 | Howard Lee | Other F | 769 | $14.2K |
| Jun 1, 2026 | David Russell Gaugh | Grant A | 17.4K | $0 |
| Jun 1, 2026 | David Russell Gaugh | Grant A | 8.1K | $0 |
| Jun 1, 2026 | Gayle Deflin | Grant A | 17.4K | $0 |
| Jun 1, 2026 | Gayle Deflin | Grant A | 8.1K | $0 |
| Jun 1, 2026 | Diane G. Gerst | Grant A | 17.4K | $0 |
| Jun 1, 2026 | Diane G. Gerst | Grant A | 8.1K | $0 |
| Jun 1, 2026 | Howard Lee | Grant A | 17.4K | $0 |
| Jun 1, 2026 | Howard Lee | Grant A | 8.1K | $0 |
| Jun 1, 2026 | Richard K Prins | Grant A | 17.4K | $0 |
| Jun 1, 2026 | Richard K Prins | Grant A | 8.1K | $0 |
| Jun 1, 2026 | ZASLOFF MICHAEL A | Grant A | 17.4K | $0 |
| Jun 1, 2026 | ZASLOFF MICHAEL A | Grant A | 8.1K | $0 |
About AMPH insider trading
This page tracks insider transactions for Amphastar Pharmaceuticals, Inc. (AMPH) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.