Stefan Constantin Ionel
Insider transactions at 1 company
This page shows all SEC Form 4 filings attributed to Stefan Constantin Ionel. Form 4 disclosures are required whenever a corporate insider — director, officer, or 10%+ shareholder — buys, sells, or receives company stock. Each row represents a separate reported transaction. All data is sourced directly from the SEC EDGAR public database.
| Company | Title | Type | Shares | Price | Value | Date |
|---|---|---|---|---|---|---|
| AMPX-WT | Chief Technology Officer | Sale | 198,255 | $10.51 | $2,083,660 | Dec 11, 2025 |
| AMPX-WT | Chief Technology Officer | Sale | 25,024 | $10.08 | $252,242 | Nov 21, 2025 |
| AMPX-WT | Chief Technology Officer | Sale | 19,159 | $6.82 | $130,664 | Aug 21, 2025 |
| AMPX-WT | Chief Technology Officer | Sale | 20,366 | $2.43 | $49,489 | May 21, 2025 |
| AMPX-WT | Chief Technology Officer | Award / Grant | 461,540 | — | — | Mar 19, 2025 |
| AMPX-WT | Chief Technology Officer | Option Exercise | 3,471 | $0.98 | $3,402 | Mar 14, 2025 |
| AMPX-WT | Chief Technology Officer | Sale | 9,066 | $3.13 | $28,377 | Feb 21, 2025 |
| AMPX-WT | Chief Technology Officer | Sale | 8,575 | $1.96 | $16,807 | Nov 21, 2024 |
| AMPX-WT | Chief Technology Officer | Sale | 8,800 | $1.04 | $9,152 | Aug 21, 2024 |
| AMPX-WT | Chief Technology Officer | Sale | 5,272 | $1.33 | $7,012 | May 22, 2024 |
| AMPX-WT | Chief Technology Officer | Award / Grant | 374,570 | — | — | Mar 19, 2024 |
| AMPX-WT | Chief Technology Officer | Sale | 33,630 | $3.89 | $130,821 | Sep 14, 2023 |
| AMPX-WT | Chief Technology Officer | Option Exercise | 80,000 | $0.05 | $4,000 | Sep 9, 2023 |
| AMPX-WT | Chief Technology Officer | Tax Withholding | 209 | $7.20 | $1,505 | Dec 14, 2022 |
| AMPX-WT | Chief Technology Officer | Option Exercise | 30,000 | $0.05 | $1,500 | Dec 14, 2022 |