| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 04/02/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Payment of Exercise | Common Stock | 2.4k | $0.00 | $0 | | 04/02/2018 |
| 04/02/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Exercise | Restricted Stock Unit | 7k | $0.00 | $0 | | 04/02/2018 |
| 02/21/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Grant | Option to Purchase Common Stock | 195k | $2.04 | $397.8k | | 02/21/2018 |
| 01/16/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 41.9k | $0.92 | $38.5k | | 01/08/2018 |
| 01/12/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 11.2k | $0.96 | $10.8k | | 01/08/2018 |
| 01/11/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 38.7k | $0.98 | $37.9k | | 01/08/2018 |
| 01/10/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 66.6k | $0.96 | $63.9k | | 01/08/2018 |
| 01/08/2018 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Exercise | Restricted Stock Unit | 449.2k | $0.00 | $0 | | 01/08/2018 |
| 04/12/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 3.9k | $2.00 | $7.8k | | 04/12/2017 |
| 04/11/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 200 | $2.00 | $400 | | 04/07/2017 |
| 04/10/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 400 | $2.00 | $800 | | 04/07/2017 |
| 04/07/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 450 | $2.01 | $902.2 | | 04/07/2017 |
| 04/06/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 867 | $2.15 | $1.9k | | 04/04/2017 |
| 04/05/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 1.8k | $2.15 | $3.9k | | 04/04/2017 |
| 04/04/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Sale | Common Stock | 1000 | $2.25 | $2.2k | | 04/04/2017 |
| 04/02/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Exercise | Restricted Stock Unit | 21.1k | $0.00 | $0 | | 04/02/2017 |
| 02/06/2017 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Grant | Option to Purchase Common Stock | 75k | $2.99 | $224.2k | | 02/06/2017 |
| 08/17/2016 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Purchase | Class B Warrant | 3.1k | $6.29 | $19.6k | | 08/17/2016 |
| 08/17/2016 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Purchase | Class A Warrant | 3.1k | $5.55 | $17.3k | | 08/17/2016 |
| 08/17/2016 | MABVAX THERAPEUTICS HOLDINGS, INC. | MBVX | Purchase | Common Stock | 3.1k | $0.00 | $0 | | 08/17/2016 |