UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 22, 2025

SPHERE ENTERTAINMENT CO.

(Exact Name of Registrant as Specified in Charter)

Nevada

001-39245

84-3755666

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)


Two Pennsylvania Plaza, New York, NY		10121
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (725) 258-0001

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading
Symbol(s)

Name of Each Exchange

on Which Registered

Class A Common Stock

SPHR

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On September 22, 2025, Gregory Brunner, Senior Vice President, Controller and Principal Accounting Officer of Sphere Entertainment Co. (the “Company”), resigned effective as of October 17, 2025. Mr. Brunner’s resignation from the Company is not a result of any disagreement with the Company’s independent auditors or any member of management on any matter of accounting principles or practices, financial statement disclosure or internal controls.

Effective as of October 17, 2025, and until such time as a replacement is named, Robert Langer, the Company’s Executive Vice President, Chief Financial Officer and Treasurer, will serve as the Company’s interim principal accounting officer.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: September 26, 2025


SPHERE ENTERTAINMENT CO. (Registrant)

By:		/s/ Mark C. Cresitello
Name:		Mark C. Cresitello
Title:		Senior Vice President, Deputy General Counsel and Secretary

Sphere Entertainment Co. 8-K