Zhou Rong
SEC insider (Form 3/4/5 filer). CIK 0001645326. SENIOR EVP, PRODUCTION CENTER at Amphastar Pharmaceuticals, Inc. (AMPH). 23 reported Form 4/5 transactions since Sep 2024; latest on Sep 16, 2026. Located in RANCHO CUCAMONGA, CA.
Companies Zhou Rong has filed insider reports for
- Amphastar Pharmaceuticals, Inc. (AMPH): Officer, SENIOR EVP, PRODUCTION CENTER
Zhou Rong
CIK: 0001645326
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Amphastar Pharmaceuticals, Inc.
Discretionary Trading P&L
Holdings
Transaction History (23 total)
- Sep 16, 2026AMPH
Amphastar Pharmaceuticals, Inc.
ExerciseDirect10K shares at avg. $13.35$134K - Sep 16, 2026AMPH
Amphastar Pharmaceuticals, Inc.
SaleDirect10K shares at avg. $23.94$239K - Sep 2, 2026AMPH
Amphastar Pharmaceuticals, Inc.
SaleDirect3.2K shares at avg. $23.63$75K - Mar 15, 2026AMPH
Amphastar Pharmaceuticals, Inc.
Tax PaymentDirect1.2K shares at avg. $18.18$22K - Mar 10, 2026AMPH
Amphastar Pharmaceuticals, Inc.
Tax PaymentDirect2.2K shares at avg. $18.91$42K - Mar 9, 2026AMPH
Amphastar Pharmaceuticals, Inc.
AwardDirect39.4K shares- - Mar 6, 2026AMPH
Amphastar Pharmaceuticals, Inc.
Tax PaymentDirect1.4K shares at avg. $19.34$26K - Mar 4, 2026AMPH
Amphastar Pharmaceuticals, Inc.
Tax PaymentDirect1.1K shares at avg. $19.96$22K - Dec 17, 2025AMPH
Amphastar Pharmaceuticals, Inc.
ExerciseDirect9.8K shares at avg. $11.33$111K - Dec 17, 2025AMPH
Amphastar Pharmaceuticals, Inc.
SaleDirect9.8K shares at avg. $26.20$256K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 16, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Exercise | 10,000 | $13.35 | $133,500 | Direct |
| Sep 16, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Sale | 10,000 | $23.94 | $239,404 | Direct |
| Sep 2, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Sale | 3,187 | $23.63 | $75,306 | Direct |
| Mar 15, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Tax Payment | 1,225 | $18.18 | $22,271 | Direct |
| Mar 10, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Tax Payment | 2,215 | $18.91 | $41,886 | Direct |
| Mar 9, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Award | 39,432 | - | $0 | Direct |
| Mar 6, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Tax Payment | 1,357 | $19.34 | $26,244 | Direct |
| Mar 4, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Tax Payment | 1,124 | $19.96 | $22,435 | Direct |
| Dec 17, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | Exercise | 9,787 | $11.33 | $110,887 | Direct |
| Dec 17, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | Sale | 9,787 | $26.20 | $256,379 | Direct |
1-10 of 23 transactions