James L. Dolan - 25 Feb 2026 SCHEDULE 13D/A Report for Sphere Entertainment Co. Class A Common Stock, par value $.01 per share (SPHR)

Filing manager
James L. Dolan
Reporting owner
Mary S. Dolan, as Trustee of certain trusts described herein
Security
Sphere Entertainment Co. Class A Common Stock, par value $.01 per share
Beneficially owned shares
4,280,651 shares
Ownership signal CIK-linked ownership evidence from parsed SEC filings. 2 signals
Large-stake signal

Form

SCHEDULE 13D/A

Active or control-oriented beneficial ownership filing.

Ownership

13%

Beneficial ownership of this reported class.

Shares

4,280,651 shares

Shares beneficially owned as disclosed.

Event date

25 Feb 2026

Date tied to the ownership event or amendment.

Accepted by SEC

09 Mar 2026

EDGAR acceptance date.

How to read this large-stake filing
  • Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
  • Compare this filing with the holder history and issuer page before treating the percentage as a current position.
  • Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership
13%
Subject security Names, identifiers, and filing context for this profile. 2 source fields
Symbol
SPHR
Shares outstanding
32,928,085 shares
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
SCHEDULE 13D/A
Accepted by SEC
09 Mar 2026, 20:14:20 UTC
Event date
25 Feb 2026
Prior SEC filing
10 Sep 2025
Source filing
View source filing

Key filing fact

James L. Dolan disclosed 13% ownership in Sphere Entertainment Co. Class A Common Stock, par value $.01 per share (SPHR) on 25 Feb 2026.

Key facts

  • James L. Dolan filed SCHEDULE 13D/A for Sphere Entertainment Co. Class A Common Stock, par value $.01 per share (SPHR).
  • Disclosed ownership: 13%.
  • Date of event: 25 Feb 2026.

Change

  • Previous schedule filing date: 10 Sep 2025.
  • Current filing was accepted on 09 Mar 2026, 20:14.

Research use

  • This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
  • Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

View source filing

Reporting persons

Disclosed reporting parties (24)

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name Ownership Shares owned Sole voting power Shared voting power Signature Title CIK
James L. Dolan 11% 3,479,807 1,451,276 2,028,531 /s/ James L. Dolan James L. Dolan 0000933028
Thomas C. Dolan 4.1% 1,234,090 29,355 1,204,735 /s/ Thomas C. Dolan Thomas C. Dolan 0000933029
Kathleen M. Dolan, individually and as Trustee of certain trusts described herein 12% 3,693,479 18,632 3,674,847 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact 0000933026
Marianne Dolan Weber 4.2% 1,245,357 11,606 1,233,751 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact 0001098901
Deborah A. Dolan-Sweeney 4.1% 1,224,555 10,419 1,214,136 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact 0000933025
Patrick F. Dolan 0.2% 58,022 1,075 56,947 /s/ Dennis H. Haver Dennis H. Javer as Attorney-in-Fact 0000932963
Corby Dolan Leinauer, as Trustee of certain trusts described herein 11% 3,682,059 192 3,681,867 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact 0001788337
Mary S. Dolan, as Trustee of certain trusts described herein 13% 4,280,651 3,453 4,277,198 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact 0000933022
Paul J. Dolan, as a Trustee of certain trusts described herein 5.2% 1,552,631 46,607 1,506,024 /s/ Paul J. Dolan Paul J. Dolan 0001025983
Charles F. Dolan Children Trust FBO Kathleen M. Dolan 1.7% 488,579 488,579 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505843
Charles F. Dolan Children Trust FBO Deborah Dolan-Sweeney 1.8% 535,276 535,276 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505845
Charles F. Dolan Children Trust FBO Marianne Dolan Weber 1.6% 474,339 474,339 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505849
Charles F. Dolan Children Trust FBO Thomas C. Dolan 1.7% 488,579 488,579 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505848
Charles F. Dolan Children Trust FBO James L. Dolan 3.3% 960,498 960,498 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505850
Charles F. Dolan 2009 Family Trust FBO James L. Dolan 3.5% 1,053,283 1,053,283 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Mary S. Dolan, Trustee 0001505853
Charles F. Dolan 2009 Family Trust FBO Thomas C. Dolan 2.4% 716,156 716,156 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Mary S. Dolan, Trustee 0001505856
Charles F. Dolan 2009 Family Trust FBO Kathleen M. Dolan 2.1% 621,308 621,308 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Mary S. Dolan, Trustee 0001505858
Charles F. Dolan 2009 Family Trust FBO Marianne E. Dolan Weber 2.2% 653,144 653,144 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Mary S. Dolan, Trustee 0001505857
Charles F. Dolan 2009 Family Trust FBO Deborah A. Dolan-Sweeney 2% 578,498 578,498 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Mary S. Dolan, Trustee 0001505854
Charles F. Dolan 2009 Family Trust FBO Patrick F. Dolan 0.2% 56,947 56,947 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Mary S. Dolan, Trustee 0001505855
Ryan Dolan 1989 Trust 0.1% 7,659 7,659 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505841
Tara Dolan 1989 Trust 0.1% 7,659 7,659 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Kathleen M. Dolan, Trustee 0001505842
Marianne E. Dolan Weber 2012 Descendants Trust 0.2% 56,948 56,948 0 /s/ Brian G. Sweeney Brian G. Sweeney as Attorney-in-Fact for Richard Baccari, Trustee 0001564760
Kathleen M. Dolan 2012 Descendants Trust 0.2% 56,947 56,947 0 /s/ Paul J. Dolan Paul J. Dolan, Trustee 0001564761
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