Exhibit 99.1
| 22C Capital I, L.P. | |||
| By: | 22C Capital GP I, L.L.C., its general partner | ||
| By: | 22C Capital GP I MM LLC, its managing member | ||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Member | Date: 07/02/2021 | |
| 22C DiscoverOrg Advisors, LLC | |||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Managing Member | Date: 07/02/2021 | |
| 22C DiscoverOrg Investors, LLC | |||
| By: | 22C DiscoverOrg MM, LLC, its managing member | ||
| By: | 22C DiscoverOrg Advisors, LLC, its managing member | ||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Managing Member | Date: 07/02/2021 | |
| 22C Magellan Holdings LLC | |||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Officer with Title of Authorized Signatory | Date: 07/02/2021 | |
| 22C Capital GP I MM LLC | |||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Member | Date: 07/02/2021 | |
| 22C Capital GP I, L.L.C. | |||
| By: | 22C Capital GP I MM LLC, its managing member | ||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Member | Date: 07/02/2021 | |
| 22C DiscoverOrg MM, LLC | |||
| By: | 22C DiscoverOrg Advisors, LLC, its managing member | ||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Managing Member | Date: 07/02/2021 | |
| 22C Capital I-A, L.P | |||
| By: | 22C Capital GP I, L.L.C., its general partner | ||
| By: | 22C Capital GP I MM LLC, its managing member | ||
| By: | /s/ Eric J. Edell | ||
| Name: | Eric J. Edell | ||
| Title: | Managing Member | Date: 07/02/2021 | |