Cox John
Insider transactions at 3 companies
This page shows all SEC Form 4 filings attributed to Cox John. 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 |
|---|---|---|---|---|---|---|
| DYN | CEO & President | Sale | 2,662 | $20.72 | $55,157 | Dec 5, 2025 |
| DYN | CEO & President | Sale | 2,640 | $13.41 | $35,402 | Sep 5, 2025 |
| DYN | CEO & President | Gift | 10,000 | — | — | Jul 14, 2025 |
| DYN | CEO & President | Sale | 4,060 | $13.35 | $54,201 | Jun 5, 2025 |
| DYN | CEO & President | Sale | 4,061 | $11.83 | $48,042 | Mar 5, 2025 |
| DYN | CEO & President | Award / Grant | 145,300 | — | — | Dec 4, 2024 |
| DYN | CEO & President | Purchase | 800 | $32.57 | $26,056 | Sep 4, 2024 |
| 0001821323 | Disposition | 341 | — | — | Aug 11, 2023 | |
| 0001821323 | C | 4,444 | — | — | Dec 8, 2020 | |
| RGEN | Sale | 1,858 | $96.72 | $179,706 | Mar 24, 2020 | |
| RGEN | Option Exercise | 3,304 | $42.07 | $138,999 | Mar 18, 2020 | |
| RGEN | Option Exercise | 10,000 | $12.91 | $129,100 | Mar 4, 2020 | |
| RGEN | Sale | 4,355 | $92.76 | $403,970 | Feb 24, 2020 | |
| RGEN | Award / Grant | 923 | — | — | May 15, 2019 | |
| RGEN | Award / Grant | 1,486 | — | — | May 16, 2018 | |
| 0001681689 | Chief Executive Officer | Disposition | 185,094 | — | — | Mar 8, 2018 |
| 0001681689 | Chief Executive Officer | Tax Withholding | 13,973 | $104.30 | $1,457,384 | Feb 23, 2018 |
| 0001681689 | Chief Executive Officer | Tax Withholding | 10,819 | $103.52 | $1,119,983 | Feb 14, 2018 |
| 0001681689 | Chief Executive Officer | Tax Withholding | 7,672 | $103.05 | $790,600 | Feb 11, 2018 |
| RGEN | Award / Grant | 1,206 | — | — | May 18, 2017 | |
| 0001681689 | Chief Executive Officer | Tax Withholding | 8,416 | $54.46 | $458,335 | Mar 31, 2017 |
| 0001681689 | Chief Executive Officer | Tax Withholding | 2,641 | $49.56 | $130,888 | Feb 28, 2017 |
| RGEN | Award / Grant | 1,763 | — | — | May 11, 2016 | |
| BIIB | EVP Pharmaceutical Oper & Tech | Award / Grant | 8,444 | — | — | Apr 1, 2016 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 810 | — | — | Feb 23, 2016 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 495 | $247.22 | $122,374 | Feb 12, 2016 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 1,324 | $250.77 | $332,019 | Feb 8, 2016 |
| RGEN | Award / Grant | 1,858 | — | — | May 21, 2015 | |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 2,891 | $60.56 | $175,079 | Mar 25, 2015 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 2,246 | — | — | Feb 12, 2015 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 1,537 | $402.00 | $617,874 | Feb 9, 2015 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 1,228 | $347.11 | $426,251 | Feb 23, 2014 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 2,246 | — | — | Feb 12, 2014 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 1,441 | $315.54 | $454,693 | Feb 9, 2014 |
| BIIB | EVP Pharmaceutical Oper & Tech | Gift | 200 | — | — | Nov 25, 2013 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 866 | $218.85 | $189,524 | May 3, 2013 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 2,598 | — | — | Feb 23, 2013 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 1,836 | $164.44 | $301,912 | Feb 8, 2013 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 765 | $134.26 | $102,709 | May 3, 2012 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 785 | $116.39 | $91,366 | Feb 24, 2012 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 1,504 | $117.78 | $177,141 | Feb 9, 2012 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 2,175 | $72.87 | $158,492 | Nov 1, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 765 | $97.99 | $74,962 | May 3, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 4,350 | $72.87 | $316,985 | Apr 21, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 3,900 | $67.57 | $263,523 | Apr 13, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 6,900 | $47.92 | $330,648 | Apr 11, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 2,840 | $43.50 | $123,540 | Mar 31, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Sale | 100 | $70.45 | $7,045 | Mar 2, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Tax Withholding | 604 | $67.26 | $40,625 | Feb 24, 2011 |
| BIIB | EVP Pharmaceutical Oper & Tech | Option Exercise | 405 | — | — | Feb 23, 2011 |