Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G dated February 14, 2025 relating to the Class A Common Stock, par value $0.0001 per share, of Reddit, Inc. shall be filed on behalf of the undersigned.

COATUE MANAGEMENT, L.L.C.

By: /s/ Philippe Laffont

Name: Philippe Laffont

Title:   Authorized Signatory

PHILIPPE LAFFONT

By: /s/ Philippe Laffont