Who
Jack Y. Zhang
CEO & Chief Scientific Officer
Company insider
Files Form 4 as: CEO & Chief Scientific Officer, Amphastar Pharmaceuticals.
In numbers
- Trades disclosed
- 204
- Buys
- 2
- Sells
- 30
- Bought
- $643K
- Sold
- $29.1M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 5 Jun 2015
- Last trade
- 15 Mar 2026
- Last filed
- 17 Mar 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $178K9,784 at $18.18 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $53K2,908 at $18.18 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $178K9,784 at $18.18 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $53K2,908 at $18.18 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $280K14,785 at $18.91 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $83K4,395 at $18.91 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $280K14,785 at $18.91 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $83K4,395 at $18.91 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —180,504 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —72,462 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —372,338 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —149,472 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —372,338 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —149,472 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —180,504 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —72,462 at $0.00 | filing |
| 6 Mar 2026filed 10 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $150K7,773 at $19.34 | filing |
| 6 Mar 2026filed 10 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $60K3,077 at $19.34 | filing |
| 4 Mar 2026filed 6 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $115K5,769 at $19.96 | filing |
| 4 Mar 2026filed 6 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $49K2,432 at $19.96 | filing |
News
Comparing Amphastar Pharmaceuticals (NASDAQ:AMPH) & Enanta Pharmaceuticals (NASDAQ:ENTA)AMPH · tickerreport.com · 13 Oct 2026
0 headlines in the last 90 days name Jack Y. Zhang; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.