| Type | Name | Date |
| Employment agreement | Amendment No. 1 to Employment Agreement between Theriva Biologics, Inc. and Steven A. Shallcross | 12/20/2022 |
| Employment agreement | AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT | 12/20/2022 |
| Employment agreement | Amendment to Employment Agreement with Steven A. Shallcross | 12/05/2019 |
| Employment agreement | Employment Agreement with Steven A. Shallcross | 12/06/2018 |
| Employment agreement | Amendment to Employment Agreement, by and between Steven A. Shallcross and Synthetic Biologics, Inc | 12/21/2017 |
| Employment agreement | Amendment to Employment Agreement, by and between Steven A. Shallcross and Synthetic Biologics, Inc | 06/02/2017 |
| Employment agreement | Employment Agreement, by and between Dr. Joseph Sliman and Synthetic Biologics, Inc | 01/19/2017 |
| Employment agreement | Amendment to Employment Agreement between the Company and Steven A. Shallcross | 12/02/2016 |
| Employment agreement | Amendment to Employment Agreement by and between Synthetic Biologics, Inc. and Jeffrey Riley | 12/10/2015 |
| Employment agreement | Employment Agreement, by and between Steven A. Shallcross and the Company | 05/04/2015 |
| Employment agreement | Employment Agreement, by and between Jeffrey Riley and the Company | 03/19/2015 |
| Employment agreement | Employment Agreement, by and between C. Evan Ballantyne and the Company | 03/19/2015 |
| Employment agreement | Amendment to Employment Agreement between the Company and Jeffrey Riley | 04/21/2014 |
| Employment agreement | Amendment to Employment Agreement between the Company and C. Evan Ballantyne | 04/21/2014 |
| Employment agreement | Employment Agreement, by and between C. Evan Ballantyne and the Company | 02/07/2012 |
| Employment agreement | Employment Agreement, by and between Jeff Riley and the Company | 02/06/2012 |
| Employment agreement | Employment Agreement with Dr. James S. Kuo | 02/09/2010 |