Exhibit D.4
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Class A Common Stock, $0.01 par value, of Sphere Entertainment Co. This Joint Filing Agreement shall be filed as an Exhibit to such Statement.
Date: October 22, 2026
| /s/ James L. Dolan | |
| James L. Dolan | |
| /s/ Thomas C. Dolan | |
| Thomas C. Dolan | |
| * | |
| Kathleen M. Dolan | |
| * | |
| Marianne Dolan Weber | |
| * | |
| Deborah A. Dolan-Sweeney | |
| ** | |
| Patrick F. Dolan | |
| * | |
| Corby Dolan Leinauer | |
| * | |
| Mary S. Dolan | |
| /s/ Paul J. Dolan | |
| Paul J. Dolan |
| Charles F. Dolan Children Trust FBO Kathleen M. Dolan | ||
| Charles F. Dolan Children Trust FBO James L. Dolan | ||
| * | ||
| By: | Kathleen M. Dolan, Trustee | |
| /s/ Paul J. Dolan | ||
| By: | Paul J. Dolan, Trustee | |
| Charles F. Dolan Children Trust FBO Marianne Dolan Weber | ||
| Charles F. Dolan Children Trust FBO Thomas C. Dolan | ||
| * | ||
| By: | Kathleen M. Dolan, Trustee | |
| * | ||
| By: | Matthew J. Dolan, Trustee | |
| Charles F. Dolan Children Trust FBO Deborah Dolan-Sweeney | ||
| * | ||
| By: | Kathleen M. Dolan, Trustee | |
| * | ||
| By: | Mary S. Dolan, Trustee | |
| CHARLES F. DoLAN 2009 Family Trust FBO Kathleen M. Dolan | ||
| CHARLES F. DoLAN 2009 Family Trust FBO Deborah A. Dolan-Sweeney | ||
| CHARLES F. DoLAN 2009 Family Trust FBO Marianne E. Dolan Weber | ||
| CHARLES F. DoLAN 2009 Family Trust FBO Thomas C. Dolan | ||
| CHARLES F. DoLAN 2009 Family Trust FBO James L. Dolan | ||
| CHARLES F. DOLAN 2009 FAMILY TRUST FBO pATRICK F. DOLAN | ||
| * | ||
| By: | Mary S. Dolan, Trustee | |
| * | ||
| By: | Corby Dolan Leinauer, Trustee | |
| Ryan Dolan 1989 Trust | ||
| Tara Dolan 1989 Trust | ||
| * | ||
| By: | Kathleen M. Dolan, Trustee | |
| MARIANNE E. DOLAN WEBER 2012 DESCENDANTS TRUST | ||
| * | ||
| By: | Richard Baccari, Trustee | |
| KATHLEEN M. DOLAN 2012 DESCENDANTS TRUST | ||
| /s/ Paul J. Dolan | ||
| By: | Paul J. Dolan, Trustee | |
| * | ||
| By: | Mary S. Dolan, Trustee | |
| *By: | /s/ Brian G. Sweeney | |
| Brian G. Sweeney | ||
| as Attorney-in-Fact |
| **By: | /s/ Dennis H. Javer | |
| Dennis H. Javer | ||
| as Attorney-in-Fact |