Liu David Y
Insider transactions at 1 company
This page shows all SEC Form 4 filings attributed to Liu David Y. 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 |
|---|---|---|---|---|---|---|
| PTGX | Chief R&D Strategy Officer | Option Exercise | 13,767 | $0.87 | $11,977 | Nov 16, 2022 |
| PTGX | Chief Scientific Officer | Tax Withholding | 2,119 | $24.28 | $51,449 | Feb 28, 2022 |
| PTGX | Chief Scientific Officer | Award / Grant | 10,000 | — | — | Feb 15, 2022 |
| PTGX | Chief Scientific Officer | Option Exercise | 10,000 | $0.87 | $8,700 | Aug 17, 2021 |
| PTGX | Chief Scientific Officer | Award / Grant | 10,000 | — | — | Feb 26, 2021 |
| PTGX | Chief Scientific Officer | Sale | 3,395 | $8.85 | $30,046 | Aug 6, 2019 |
| PTGX | Chief Scientific Officer | Sale | 810 | $8.03 | $6,504 | Feb 28, 2019 |
| PTGX | Chief Scientific Officer | Sale | 3,821 | $7.74 | $29,575 | Feb 6, 2019 |
| PTGX | Chief Scientific Officer | Award / Grant | 25,800 | — | — | Aug 15, 2018 |
| PTGX | Chief Scientific Officer | Option Exercise | 3,500 | $4.21 | $14,735 | Mar 12, 2018 |
| PTGX | Chief Scientific Officer | Sale | 875 | $20.00 | $17,500 | Mar 2, 2018 |
| PTGX | Chief Scientific Officer | Sale | 875 | $20.00 | $17,500 | Jan 16, 2018 |
| PTGX | Chief Scientific Officer | Option Exercise | 875 | $1.89 | $1,654 | Dec 18, 2017 |
| PTGX | Chief Scientific Officer | Sale | 875 | $20.00 | $17,500 | Nov 30, 2017 |
| PTGX | Chief Scientific Officer | Sale | 3,500 | $16.97 | $59,395 | Nov 13, 2017 |
| PTGX | Chief Scientific Officer | Sale | 3,500 | $15.00 | $52,500 | Aug 28, 2017 |
| PTGX | Chief Scientific Officer | Option Exercise | 3,500 | $1.89 | $6,615 | Jul 10, 2017 |