HEIDEN WILLIAM K
Insider transactions at 2 companies
This page shows all SEC Form 4 filings attributed to HEIDEN WILLIAM K. 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 |
|---|---|---|---|---|---|---|
| MGNX | Purchase | 50,500 | $1.52 | $76,760 | Aug 20, 2025 | |
| ATRA | Award / Grant | 7,828 | — | — | Jun 10, 2025 | |
| MGNX | Option Exercise | 6,500 | — | — | May 20, 2025 | |
| MGNX | Option Exercise | 4,500 | — | — | May 20, 2024 | |
| ATRA | Award / Grant | 150,000 | — | — | Mar 31, 2024 | |
| ATRA | Purchase | 100,000 | $0.25 | $25,000 | Nov 10, 2023 | |
| ATRA | Award / Grant | 57,000 | — | — | May 31, 2023 | |
| ATRA | Award / Grant | 20,500 | — | — | Jun 23, 2022 | |
| ATRA | Award / Grant | 11,000 | — | — | Jun 8, 2021 | |
| ATRA | Award / Grant | 8,000 | — | — | Jun 16, 2020 | |
| 0000792977 | President & CEO | Tax Withholding | 4,451 | $7.75 | $34,495 | Mar 2, 2020 |
| 0000792977 | President & CEO | Tax Withholding | 3,033 | $8.84 | $26,812 | Feb 23, 2020 |
| ATRA | Award / Grant | 4,000 | — | — | Jun 27, 2019 | |
| 0000792977 | President & CEO | Purchase | 10,000 | $10.70 | $107,000 | May 9, 2019 |
| 0000792977 | President & CEO | Tax Withholding | 4,467 | $14.76 | $65,933 | Mar 1, 2019 |
| 0000792977 | President & CEO | Award / Grant | 132,000 | — | — | Feb 25, 2019 |
| 0000792977 | President & CEO | Tax Withholding | 2,957 | $15.51 | $45,863 | Feb 23, 2019 |
| 0000792977 | President & CEO | Sale | 5,000 | $25.00 | $125,000 | Aug 7, 2018 |
| ATRA | Award / Grant | 1,500 | — | — | Jun 14, 2018 | |
| 0000792977 | President & CEO | Sale | 20,000 | $25.00 | $500,000 | Jun 4, 2018 |
| 0000792977 | President & CEO | Tax Withholding | 10,546 | $21.00 | $221,466 | Mar 2, 2018 |
| ATRA | Award / Grant | 5,000 | — | — | Jun 8, 2017 | |
| 0000792977 | President & CEO | Tax Withholding | 19,085 | $18.55 | $354,027 | May 8, 2017 |
| 0000792977 | CEO | Award / Grant | 55,000 | — | — | Feb 23, 2017 |
| ATRA | Award / Grant | 2,000 | — | — | Jan 3, 2017 | |
| 0000792977 | CEO | Tax Withholding | 11,812 | $18.27 | $215,805 | May 16, 2016 |
| 0000792977 | CEO | Tax Withholding | 4,070 | $27.01 | $109,931 | Mar 1, 2016 |
| 0000792977 | CEO | Sale | 2,000 | $39.69 | $79,380 | Oct 1, 2015 |
| 0000792977 | CEO | Sale | 2,000 | $61.19 | $122,380 | Sep 1, 2015 |
| 0000792977 | CEO | Sale | 2,000 | $64.53 | $129,060 | Aug 3, 2015 |
| 0000792977 | CEO | Sale | 20,000 | $75.00 | $1,500,000 | Jul 15, 2015 |
| 0000792977 | CEO | Sale | 2,000 | $69.41 | $138,820 | Jul 1, 2015 |
| 0000792977 | CEO | Sale | 6,642 | $68.90 | $457,634 | Jun 5, 2015 |
| 0000792977 | CEO | Tax Withholding | 11,378 | $67.77 | $771,087 | Jun 2, 2015 |
| 0000792977 | President and CEO | Tax Withholding | 2,474 | $49.70 | $122,958 | Mar 3, 2015 |
| 0000792977 | President and CEO | Award / Grant | 30,000 | — | — | Feb 26, 2015 |
| 0000792977 | President and CEO | Tax Withholding | 9,890 | $40.49 | $400,446 | Dec 17, 2014 |
| 0000792977 | President and CEO | Award / Grant | 30,000 | — | — | Aug 19, 2014 |
| 0000792977 | President and CEO | Award / Grant | 15,600 | — | — | Feb 27, 2014 |
| 0000792977 | President and CEO | Option Exercise | 10,000 | $12.99 | $129,900 | May 24, 2013 |
| 0000792977 | President and CEO | Tax Withholding | 8,162 | $25.03 | $204,295 | May 14, 2013 |
| 0000792977 | President and CEO | Award / Grant | 14,400 | — | — | Feb 28, 2013 |
| 0000792977 | President and CEO | Purchase | 5,000 | — | — | May 24, 2012 |