Results of Operations and Financial Condition. On July 30, 2026, Sphere Entertainment Co. (the “Company”) announced its financial results for its second quarter ended June 30, 2026. A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exch…

Results of Operations and Financial Condition. On May 5, 2026 , Sphere Entertainment Co. (the “Company”) announced its financial results for its first quarter ended March 31, 2026 . A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exch…

Results of Operations and Financial Condition. On February 12, 2026 , Sphere Entertainment Co. (the “Company”) announced its financial results for its fourth quarter and year ended December 31, 2025. A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of t…

Entry into a Material Definitive Agreement. On January 29, 2026, MSG Las Vegas, LLC (“MSG LV”), an indirect, wholly-owned subsidiary of Sphere Entertainment Co. (the “Company”), entered into a credit agreement with JPMorgan Chase Bank, N.A., as Administrative Agent and L/C Issuer, and the lenders party thereto, providing for (i) a $275 million senior secured term loan facility (the “Term Loan Facility”) to refinance the existing term loan and (ii) a senior secured revolving credit facility in…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information contained in

Principal Accounting Officer — Christopher Winters: The filing discloses the appointment of a new Senior Vice President, Controller, and Principal Accounting Officer, which is a significant executive addition but not a departure.

Results of Operations and Financial Condition. On November 4, 2025 , Sphere Entertainment Co. (the “Company”) announced its financial results for its third quarter ended September 30, 2025 . A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securi…

Principal Accounting Officer — Gregory Brunner: The resignation of the Senior Vice President, Controller, and Principal Accounting Officer is a genuine departure of a senior financial officer, though mitigated by the immediate appointment of an interim successor.

CEO — Andrea Greenberg: The CEO of a major subsidiary departed following the expiration of her employment agreement, which is a significant management change but not necessarily a negative shock given the contractual nature of the exit.

Results of Operations and Financial Condition. On August 11, 2025 , Sphere Entertainment Co. (the “Company”) announced its financial results for its second quarter ended June 30, 2025 . A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities…

Entry into a Material Definitive Agreement. On the Effective Date, the Borrower, MSG Networks, MSGN Eden, Regional MSGN, Rainbow Garden Corp., a wholly-owned subsidiary of MSG Networks (“Rainbow Garden Corp.” and, collectively with MSG Networks, MSGN Eden and Regional MSGN, the “Holdings Entities”), and certain subsidiaries of the Borrower entered into a second amended and restated credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent, and the lende…

Other Events. In connection with the Transactions, as of the Effective Date, certain parties to the Transaction Support Agreement have entered into certain other agreements, as described herein. Investor Agreement On the Effective Date, MSG Networks, the Borrower, MSGN Eden, Regional MSGN, Rainbow Garden Corp. and the Company entered into an Investor Agreement (the “Investor Agreement”), pursuant to which (i) the Company made a capital contribution to MSG Networks in an amount equal to $15 mi…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information contained in

Material Modification to Rights of Shareholders. On June 4, 2025, at the annual meeting of stockholders (the “Annual Meeting”) of Sphere Entertainment Co. (the “Company”), the stockholders of the Company approved a proposal to redomesticate the Company (the “Redomestication”) from a corporation organized under the laws of the State of Delaware (the “Delaware Corporation”) to a corporation organized under the laws of the State of Nevada (the “Nevada Corporation”) by means of a plan of conversi…

Results of Operations and Financial Condition. On May 8, 2025 , Sphere Entertainment Co. (the “Company”) announced its financial results for its first quarter ended March 31, 2025 . A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exch…

Entry into a Material Definitive Agreement. On April 24, 2025, Sphere Entertainment Co. (the “Company”), its wholly-owned subsidiary, MSG Networks Inc. (“MSG Networks”), and certain subsidiaries of MSG Networks entered into a Transaction Support Agreement (the “Transaction Support Agreement”) with respect to the restructuring of the debt of subsidiaries of MSG Networks and amendments to the media rights agreements between subsidiaries of MSG Networks and New York Knicks, LLC and New York Rang…

Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

Entry into a Material Definitive Agreement. As previously reported, on October 11, 2024, MSGN Holdings L.P. (“MSGN L.P.”), an indirect wholly owned subsidiary of Sphere Entertainment Co. (the “Company”), the guarantors identified therein (the “Guarantors”), JPMorgan Chase Bank, N.A., as administrative agent, and the lenders party thereto (the “Supporting Lenders”) entered into a Forbearance Agreement (as amended from time to time, the “Forbearance Agreement”) pursuant to which the Supporting…

Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

Entry into a Material Definitive Agreement. As previously reported, on October 11, 2024, MSGN Holdings L.P. (“MSGN L.P.”), an indirect wholly owned subsidiary of Sphere Entertainment Co. (the “Company”), the guarantors identified therein (the “Guarantors”), JPMorgan Chase Bank, N.A., as administrative agent, and the lenders party thereto (the “Supporting Lenders”) entered into a Forbearance Agreement (as amended from time to time, the “Forbearance Agreement”) pursuant to which the Supporting…

Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

Entry into a Material Definitive Agreement. As previously reported, on October 11, 2024, MSGN Holdings L.P. (“MSGN L.P.”), an indirect wholly owned subsidiary of Sphere Entertainment Co. (the “Company”), the guarantors identified therein (the “Guarantors”), JPMorgan Chase Bank, N.A., as administrative agent, and the lenders party thereto (the “Supporting Lenders”) entered into a Forbearance Agreement (as amended from time to time, the “Forbearance Agreement”) pursuant to which the Supporting…

Director — Carl E. Vogel: A director announced he will not stand for re-election at the upcoming annual meeting, which is a routine board turnover event with no stated disagreement.

Entry into a Material Definitive Agreement. As previously reported, on October 11, 2024, MSGN Holdings L.P. (“MSGN L.P.”), an indirect wholly owned subsidiary of Sphere Entertainment Co. (the “Company”), the guarantors identified therein (the “Guarantors” and, together with MSGN L.P., collectively, the “Loan Parties”), JPMorgan Chase Bank, N.A., as administrative agent (the “Agent”), and the lenders party thereto (the “Supporting Lenders”) entered into a Forbearance Agreement (the “Forbearanc…

Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in