AMPH Insider Transactions
576 retained open-market purchase and sale rows from SEC Forms 3, 4 and 5, newest first. This page shows rows 1–100; provenance stays internal.
AMPH insiders transaction timeline
PurchaseSale
| Insider profile | Role | Date | Transaction | Shares | Price |
|---|---|---|---|---|---|
| PRINS RICHARD K | Director | 2026-08-11 | Sale | 7,973 | $20.30 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2026-08-07 | Sale | 8,180 | $22.48 |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | 2025-12-17 | Sale | 9,787.0 | $26.2 |
| Petersen Floyd F. | Director | 2025-12-12 | Sale | 2,426.0 | $25.92 |
| Petersen Floyd F. | Director | 2025-12-11 | Sale | 1,737.0 | $25.69 |
| PRINS RICHARD K | Director | 2025-11-25 | Sale | 4,179.0 | $27.1 |
| Petersen Floyd F. | Director | 2025-11-13 | Sale | 16,679.0 | $26.49 |
| Petersen Floyd F. | Director | 2025-11-03 | Sale | 500.0 | $25.27 |
| Petersen Floyd F. | Director | 2025-10-01 | Sale | 500.0 | $27.2 |
| Petersen Floyd F. | Director | 2025-09-02 | Sale | 500.0 | $30.98 |
| Petersen Floyd F. | Director | 2025-08-01 | Sale | 500.0 | $20.83 |
| Petersen Floyd F. | Director | 2025-07-02 | Sale | 500.0 | $23.47 |
| Petersen Floyd F. | Director | 2025-06-02 | Sale | 500.0 | $25.67 |
| Petersen Floyd F. | Director | 2025-05-01 | Sale | 500.0 | $24.08 |
| Petersen Floyd F. | Director | 2025-04-01 | Sale | 500.0 | $28.38 |
| Petersen Floyd F. | Director | 2025-03-06 | Sale | 1,000.0 | $27.99 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2025-03-04 | Sale | 4,231.0 | $27.54 |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | 2024-12-13 | Sale | 8,000.0 | $45.23 |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | 2024-12-12 | Sale | 7,000.0 | $44.43 |
| PRINS RICHARD K | Director | 2024-12-09 | Sale | 10,000.0 | $43.77 |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | 2024-11-12 | Sale | 6,893.0 | $48.88 |
| PRINS RICHARD K | Director | 2024-11-12 | Sale | 5,000.0 | $48.8 |
| Liawatidewi Yakob | EVP CORP ADMIN CENTER | 2024-11-06 | Sale | 5,214.0 | $52.05 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-11-06 | Sale | 7,426.0 | $52.05 |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | 2024-09-13 | Sale | 3,000.0 | $48.26 |
| Petersen Floyd F. | Director | 2024-09-05 | Sale | 3,000.0 | $46.47 |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | 2024-08-26 | Sale | 4,000.0 | $48.35 |
| PRINS RICHARD K | Director | 2024-08-12 | Sale | 17,101.0 | $43.07 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-07-31 | Sale | 10,282.0 | $44.23 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-06-27 | Sale | 635.0 | $41.29 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-06-27 | Sale | 2,961.0 | $40.85 |
| Petersen Floyd F. | Director | 2024-06-10 | Sale | 3,000.0 | $41.4 |
| Petersen Floyd F. | Director | 2024-06-03 | Sale | 500.0 | $42.65 |
| Petersen Floyd F. | Director | 2024-05-01 | Sale | 500.0 | $41.67 |
| Petersen Floyd F. | Director | 2024-04-01 | Sale | 500.0 | $43.43 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-03-06 | Sale | 51.0 | $48.0 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-03-06 | Sale | 4,681.0 | $46.98 |
| PETERS WILLIAM J | CFO, EVP & TREASURER | 2024-03-06 | Sale | 13,404.0 | $46.3 |
| ZASLOFF MICHAEL A | Director | 2024-03-05 | Sale | 3,111.0 | $47.53 |
| ZASLOFF MICHAEL A | Director | 2024-03-05 | Sale | 9,389.0 | $47.06 |
| Petersen Floyd F. | Director | 2024-03-01 | Sale | 49.0 | $46.53 |
| Petersen Floyd F. | Director | 2024-03-01 | Sale | 451.0 | $45.6 |
| Petersen Floyd F. | Director | 2024-02-01 | Sale | 26.0 | $53.64 |
| Petersen Floyd F. | Director | 2024-02-01 | Sale | 474.0 | $53.07 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-10 | Sale | 1,716.0 | $57.0 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-10 | Sale | 1,716.0 | $57.0 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-10 | Sale | 920.0 | $55.95 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-10 | Sale | 920.0 | $55.95 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-10 | Sale | 50,514.0 | $54.89 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-10 | Sale | 50,514.0 | $54.89 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-10 | Sale | 78,236.0 | $54.32 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-10 | Sale | 78,236.0 | $54.32 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-09 | Sale | 3,714.0 | $58.35 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-09 | Sale | 3,714.0 | $58.35 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-09 | Sale | 31,764.0 | $57.7 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-09 | Sale | 31,764.0 | $57.7 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-09 | Sale | 50,678.0 | $56.7 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-09 | Sale | 50,678.0 | $56.7 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 2,152.0 | $63.27 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 2,152.0 | $63.27 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 1,663.0 | $61.81 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 1,663.0 | $61.81 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 4,261.0 | $61.19 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 4,261.0 | $61.19 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 27,563.0 | $59.99 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 27,563.0 | $59.99 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 37,865.0 | $59.24 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 37,865.0 | $59.24 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 41,282.0 | $58.25 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 41,282.0 | $58.25 |
| Luo Mary Z. | COO,Chief Scientist & Chairman | 2024-01-08 | Sale | 18,858.0 | $56.98 |
| Zhang Jack Y. | CEO & Chief Scientific Officer | 2024-01-08 | Sale | 18,858.0 | $56.98 |
| Petersen Floyd F. | Director | 2024-01-02 | Sale | 353.0 | $61.7 |
| Petersen Floyd F. | Director | 2024-01-02 | Sale | 147.0 | $60.56 |
| Zhou Rong | Senior EVP, Production Center | 2023-12-04 | Sale | 3,514.0 | $59.58 |
| Zhou Rong | Senior EVP, Production Center | 2023-12-01 | Sale | 4,316.0 | $58.58 |
| Petersen Floyd F. | Director | 2023-12-01 | Sale | 365.0 | $58.15 |
| Petersen Floyd F. | Director | 2023-12-01 | Sale | 135.0 | $57.24 |
| PRINS RICHARD K | Director | 2023-11-17 | Sale | 4,000.0 | $55.86 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-11-14 | Sale | 14,868.0 | $56.53 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-11-14 | Sale | 30,162.0 | $55.67 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-11-14 | Sale | 14,220.0 | $54.76 |
| Deflin Gayle | Director | 2023-11-14 | Sale | 4,163.0 | $55.45 |
| PRINS RICHARD K | Director | 2023-11-13 | Sale | 5,000.0 | $52.5 |
| Petersen Floyd F. | Director | 2023-11-01 | Sale | 500.0 | $45.3 |
| Petersen Floyd F. | Director | 2023-10-02 | Sale | 500.0 | $45.78 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-09-06 | Sale | 59.0 | $52.26 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-09-06 | Sale | 60,684.0 | $51.75 |
| Liawatidewi Yakob | EVP Corp Admin Center | 2023-08-28 | Sale | 28,816.0 | $53.13 |
| PRINS RICHARD K | Director | 2023-08-18 | Sale | 2,000.0 | $52.5 |
| ZASLOFF MICHAEL A | Director | 2023-08-15 | Sale | 12,759.0 | $57.22 |
| PRINS RICHARD K | Director | 2023-08-15 | Sale | 4,163.0 | $57.39 |
| Zhou Rong | EVP, Production Center | 2023-06-15 | Sale | 5,000.0 | $51.79 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-06-15 | Sale | 13,000.0 | $52.79 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-06-15 | Sale | 12,000.0 | $50.79 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-06-15 | Sale | 11,868.0 | $48.79 |
| Zhou Rong | EVP, Production Center | 2023-06-13 | Sale | 5,000.0 | $48.24 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-06-02 | Sale | 11,000.0 | $46.35 |
| Lee Howard | Director | 2023-06-01 | Sale | 16,679.0 | $45.02 |
| PETERS WILLIAM J | CFO, EVP & Treasurer | 2023-05-18 | Sale | 10,500.0 | $44.35 |