PETERS WILLIAM J — SEC Form 4 filings
SEC reporting owner CIK 1263136. 17 Form 4 filings on record with FilingPulse; latest filed 2026-08-11.
Transaction summary — filings shown
Covers all 17 filings on record, filed 2024-03-06 to 2026-08-11. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 9 legs across 6 filings — 51,851 shares, $2,131,750 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 30.
- Largest priced transaction: sale of 13,404 shares @ $46.30 ($620,540) in Amphastar Pharmaceuticals, Inc., filed 2024-03-08.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER, Director | 17 | — | 9 legs · 51,851 sh · $2,131,750 | 30 |
Form 4 filings — PETERS WILLIAM J
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-11 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Option exercise (M): 5,053 @ $19.79 · Sale (S): 8,180 @ $22.48 · Option exercise (M): 5,053 (derivative) @ $0 | EDGAR |
| 2026-03-17 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 1,973 @ $18.18 | EDGAR |
| 2026-03-11 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Grant/award (A): 58,693 @ $0 · Tax withholding (F): 3,297 @ $18.91 · Grant/award (A): 121,071 (derivative) @ $0 | EDGAR |
| 2026-03-10 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 2,146 @ $19.34 | EDGAR |
| 2026-03-06 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 1,744 @ $19.96 | EDGAR |
| 2025-05-20 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 273 @ $24.79 | EDGAR |
| 2025-03-18 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 1,968 @ $26.66 · Tax withholding (F): 3,004 @ $27.69 | EDGAR |
| 2025-03-12 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Grant/award (A): 36,747 @ $0 · Grant/award (A): 78,039 (derivative) @ $0 | EDGAR |
| 2025-03-10 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 2,141 @ $28.32 | EDGAR |
| 2025-03-06 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Option exercise (M): 7,490 @ $13.35 · Sale (S): 4,231 @ $27.54 · Tax withholding (F): 1,739 @ $27.62 · Option exercise (M): 7,490 (derivative) @ $0 | EDGAR |
| 2024-11-08 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Option exercise (M): 7,426 @ $13.03 · Sale (S): 7,426 @ $52.05 · Option exercise (M): 7,426 (derivative) @ $0 | EDGAR |
| 2024-08-02 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Option exercise (M): 10,282 @ $20.23 · Sale (S): 10,282 @ $44.23 · Option exercise (M): 10,282 (derivative) @ $0 | EDGAR |
| 2024-06-28 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Sale (S): 2,961 @ $40.85 · Sale (S): 635 @ $41.29 | EDGAR |
| 2024-05-21 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 387 @ $43.48 | EDGAR |
| 2024-03-19 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Tax withholding (F): 2,285 @ $43.05 · Tax withholding (F): 5,105 @ $43.05 · Tax withholding (F): 4,255 @ $43.05 | EDGAR |
| 2024-03-08 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Option exercise (M): 8,826 @ $11.33 · Sale (S): 13,404 @ $46.30 · Sale (S): 4,681 @ $46.98 · Sale (S): 51 @ $48 · Tax withholding (F): 2,190 @ $46.31 · Option exercise (M): 8,826 (derivative) @ $0 | EDGAR |
| 2024-03-06 | 4 | Amphastar Pharmaceuticals, Inc. (AMPH) | Grant/award (A): 19,440 @ $0 · Grant/award (A): 40,955 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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