Who
Rong Zhou
Senior EVP, Production Center
Company insider
Files Form 4 as: Senior EVP, Production Center, Amphastar Pharmaceuticals.
In numbers
- Trades disclosed
- 169
- Buys
- 0
- Sells
- 36
- Bought
- $0
- Sold
- $6.9M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 15 Jun 2015
- Last trade
- 16 Sep 2026
- Last filed
- 17 Sep 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 | |
|---|---|---|---|---|
| 16 Sep 2026filed 17 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code M | $134K10,000 at $13.35 | filing |
| 16 Sep 2026filed 17 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $239K10,000 at $23.94 | filing |
| 16 Sep 2026filed 17 Sep 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code M | —10,000 at $0.00 | filing |
| 16 Sep 2026filed 17 Sep 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code M | —10,000 at $0.00 | filing |
| 16 Sep 2026filed 17 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code M | $134K10,000 at $13.35 | filing |
| 16 Sep 2026filed 17 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $239K10,000 at $23.94 | filing |
| 2 Sep 2026filed 3 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $75K3,187 at $23.63 | filing |
| 2 Sep 2026filed 3 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $75K3,187 at $23.63 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $22K1,225 at $18.18 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $22K1,225 at $18.18 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $42K2,215 at $18.91 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $42K2,215 at $18.91 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —39,432 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —81,341 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —81,341 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —39,432 at $0.00 | filing |
| 6 Mar 2026filed 10 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $26K1,357 at $19.34 | filing |
| 6 Mar 2026filed 10 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $26K1,357 at $19.34 | filing |
| 4 Mar 2026filed 6 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $22K1,124 at $19.96 | filing |
| 4 Mar 2026filed 6 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $22K1,124 at $19.96 | filing |
News
Amphastar Pharmaceuticals (NASDAQ:AMPH) Stock Rating Cut to Buy at Wall Street ZenAMPH · dailypolitical.com · 25 Oct 2026Analyzing Amphastar Pharmaceuticals (NASDAQ:AMPH) and ImmuCell (NASDAQ:ICCC)AMPH · dailypolitical.com · 24 Oct 2026Comparing Amphastar Pharmaceuticals (NASDAQ:AMPH) & Enanta Pharmaceuticals (NASDAQ:ENTA)AMPH · tickerreport.com · 13 Oct 2026
0 headlines in the last 90 days name Rong Zhou; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.