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AMPH • CIK 0001297184
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People and entities that have reported ownership via Form 3, 3/A, 4, 4/A, 5, 5/A
Parsed transactions from Form 4 (and 3/5) filings (past year)
0 transactions · 0 shares
— total value
10 transactions · 64.61K shares
$1.58M total value
5 transactions · 51.52K shares
| Filing Date | Insiders | Transactions | Filing |
|---|---|---|---|
| Sep 23, 2026 | PETERS WILLIAM J | Sold 4.14K @ $25.00/share ($103.47K) | View |
| Sep 17, 2026 | Zhou Rong | Exercised 20.00K options @ $6.675/share; sold 10.00K @ $23.9404/share ($239.40K) | View |
| Sep 3, 2026 | Zhou Rong | Sold 3.19K @ $23.6291/share ($75.31K) | View |
| Aug 12, 2026 | PRINS RICHARD K | Sold 7.97K @ $20.30/share ($161.85K) | View |
| Aug 11, 2026 | PETERS WILLIAM J | Exercised 5.05K options @ $19.79/share; sold 8.18K @ $22.48/share ($183.89K) | View |
| Jun 3, 2026 | PRINS RICHARD K | Grant/Award: 8.14K shares Gift: 1.50K | View |
| Jun 3, 2026 | ZASLOFF MICHAEL A | Grant/Award: 8.14K shares | View |
| Mar 17, 2026 | PETERS WILLIAM J | Tax Withholding: 1.97K @ $18.18 ($35.87K) | View |
| Mar 11, 2026 | PETERS WILLIAM J | Grant/Award: 58.69K shares Tax Withholding: 3.30K @ $18.91 ($62.35K) | View |
| Mar 10, 2026 | Zhou Rong | Tax Withholding: 1.36K @ $19.34 ($26.24K) | View |
| Mar 10, 2026 | PETERS WILLIAM J | Tax Withholding: 2.15K @ $19.34 ($41.50K) | View |
| Mar 6, 2026 | PETERS WILLIAM J | Tax Withholding: 1.74K @ $19.96 ($34.81K) | View |
| Dec 18, 2025 | Zhou Rong | Exercised 9.79K options @ $11.33/share; sold 9.79K @ $26.1959/share ($256.38K) | View |
| Dec 15, 2025 | Petersen Floyd F. | Sold 4.16K @ $25.8247/share ($107.51K) | View |
| Nov 17, 2025 | Petersen Floyd F. | Exercised 16.68K options @ $16.69/share; sold 16.68K @ $26.4906/share ($441.84K) | View |
| Nov 5, 2025 | Petersen Floyd F. | Sold 500 @ $25.2662/share ($12.63K) | View |