Who
William J. Peters
CFO, EVP & Treasurer
Company insider
Files Form 4 as: CFO, EVP & Treasurer, Amphastar Pharmaceuticals; EVP & Chief Financial Officer, Hi Tech Pharmacal Co.
In numbers
- Trades disclosed
- 293
- Buys
- 0
- Sells
- 72
- Bought
- $0
- Sold
- $28.3M
- Companies
- 2
- Companies where not an officer
- 0
- First trade
- 10 Jan 2006
- Last trade
- 21 Sep 2026
- Last filed
- 23 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 | |
|---|---|---|---|---|
| 21 Sep 2026filed 23 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $103K4,139 at $25.00 | filing |
| 21 Sep 2026filed 23 Sep 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $103K4,139 at $25.00 | filing |
| 7 Aug 2026filed 11 Aug 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code M | $100K5,053 at $19.79 | filing |
| 7 Aug 2026filed 11 Aug 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $184K8,180 at $22.48 | filing |
| 7 Aug 2026filed 11 Aug 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code M | —5,053 at $0.00 | filing |
| 7 Aug 2026filed 11 Aug 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code M | —5,053 at $0.00 | filing |
| 7 Aug 2026filed 11 Aug 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code M | $100K5,053 at $19.79 | filing |
| 7 Aug 2026filed 11 Aug 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Sold | $184K8,180 at $22.48 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $36K1,973 at $18.18 | filing |
| 15 Mar 2026filed 17 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $36K1,973 at $18.18 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $62K3,297 at $18.91 | filing |
| 10 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $62K3,297 at $18.91 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —58,693 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —121,071 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar Pharmaceuticalsoption or derivative · Pharmaceuticals | SEC FORM 4 Code A | —121,071 at $0.00 | filing |
| 9 Mar 2026filed 11 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code A | —58,693 at $0.00 | filing |
| 6 Mar 2026filed 10 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $42K2,146 at $19.34 | filing |
| 6 Mar 2026filed 10 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $42K2,146 at $19.34 | filing |
| 4 Mar 2026filed 6 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $35K1,744 at $19.96 | filing |
| 4 Mar 2026filed 6 Mar 2026 | AMPH Amphastar PharmaceuticalsPharmaceuticals | SEC FORM 4 Code F | $35K1,744 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 William J. Peters; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.