Exhibit 99.1 Joint Filer Information Each of the following joint filers has designated Greenhill Capital Partners III, L.P. as the "Designated Filer" for purposes of the attached Form 4: Date of Event Requiring Statement: August 3, 2022 Issuer Name and Ticker or Trading Symbol: Zeta Global Holdings Corp. [ZETA] 1. Greenhill Capital Partners III, L.P. 600 Lexington Ave. 31st Floor New York, NY 10022 2. Greenhill Capital Partners (Employees) III, L.P. 600 Lexington Ave. 31st Floor New York, NY 10022 3. Greenhill Capital Partners (GHL) III, L.P. 600 Lexington Ave. 31st Floor New York, NY 10022 4. Greenhill Capital Partners (Cayman Islands) III, L.P. 600 Lexington Ave. 31st Floor New York, NY 10022 5. GCP Capital Partners (Cayman) IV, L.P. 600 Lexington Ave. 31st Floor New York, NY 10022 6. GCP Capital Partners IV, L.P. 600 Lexington Ave. 31st Floor New York, NY 10022 Greenhill Capital Partners III, L.P By: /s/ Boris Gutin ----------------------------- Name: Boris Gutin Title: Managing Director Greenhill Capital Partners (Employees) III, L.P. By: /s/ Boris Gutin ----------------------------- Name: Boris Gutin Title: Managing Director Greenhill Capital Partners (GHL) III, L.P. By: /s/ Boris Gutin ----------------------------- Name: Boris Gutin Title: Managing Director Greenhill Capital Partners (Cayman Islands) III, L.P. By: /s/ Boris Gutin ----------------------------- Name: Boris Gutin Title: Managing Director GCP Capital Partners (Cayman) IV, L.P. By: /s/ Boris Gutin ----------------------------- Name: Boris Gutin Title: Managing Director GCP Capital Partners IV, L.P. By: /s/ Boris Gutin ----------------------------- Name: Boris Gutin Title: Managing Director