144 0001723920 XXXXXXXX LIVE 0001795250 Sphere Entertainment Co. 001-39245 Two Penn Plaza New York NY 10121 725-258-0001 Charles F. Dolan 2009 Revocable Trust Director Affiliate Class A Common J.P. Morgan Securities LLC

270 Park Avenue - 10th Floor New York NY 10017

24389 2824733.98 28635366 03/26/2026 NYSE Class A Common 03/19/2026 Conversion of RSU Charles Dolan who acquired shares on 12/11/2024 N 24389 03/19/2026 Transfer Y 03/26/2026 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Charles F. Dolan 2009 Revocable Trust