David Granville-Smith - 15 Sep 2025 Form 4 Insider Report for Sphere Entertainment Co. (SPHR)

Role: Executive Vice President
Signature: /s/ Mark C. Cresitello, Attorney-in-Fact for David Granville-Smith
Issuer symbol: SPHR
Transactions as of: 15 Sep 2025
Net transactions value: -$1,874,115
Form type: 4
Filing time: 17 Sep 2025, 16:05:13 UTC
Previous filing: 25 Aug 2025
Next filing: 13 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Granville-Smith David	Executive Vice President	TWO PENNSYLVANIA PLAZA, NEW YORK	/s/ Mark C. Cresitello, Attorney-in-Fact for David Granville-Smith	17 Sep 2025	0001980544

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SPHR	Class A Common Stock	Options Exercise	$0	+46,742	+183%	$0.000000	72,354	15 Sep 2025	Direct	F1
transaction	SPHR	Class A Common Stock	Options Exercise	$0	+8,966	+12%	$0.000000	81,320	15 Sep 2025	Direct	F2
transaction	SPHR	Class A Common Stock	Options Exercise	$0	+3,213	+4%	$0.000000	84,533	15 Sep 2025	Direct	F3
transaction	SPHR	Class A Common Stock	Tax liability	$1,874,115	-31,085	-37%	$60.29	53,448	15 Sep 2025	Direct	F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SPHR	Restricted Stock Units	Options Exercise	$0	-46,742	-50%	$0.000000	46,742	15 Sep 2025	Class A Common Stock	46,742		Direct	F1
transaction	SPHR	Restricted Stock Units	Options Exercise	$0	-8,966	-50%	$0.000000	8,966	15 Sep 2025	Class A Common Stock	8,966		Direct	F2
transaction	SPHR	Restricted Stock Units	Options Exercise	$0	-3,213	-33%	$0.000000	6,427	15 Sep 2025	Class A Common Stock	3,213		Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") was granted on June 15, 2023 under the Sphere Entertainment Co. ("SPHR") 2020 Employee Stock Plan, as amended (the "2020 Employee Stock Plan"), and represents a right to receive one share of Class A Common Stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on September 13, 2024. One-third of the RSUs vested and were settled on September 15, 2025. The remaining one-third of the RSUs are scheduled to vest and settle on September 15, 2026.
F2	Each RSU was granted on September 1, 2023 under the 2020 Employee Stock Plan and represents a right to receive one share of Class A Common Stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on September 13, 2024. One-third of the RSUs vested and were settled on September 15, 2025. The remaining one-third of the RSUs are scheduled to vest and settle on September 15, 2026.
F3	Each RSU was granted on August 27, 2024 under the 2020 Employee Stock Plan and represents a right to receive one share of Class A Common Stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on September 15, 2025. One-third of the RSUs are scheduled to vest and settle on September 15, 2026. The remaining one-third of the RSUs are scheduled to vest and settle on September 15, 2027.
F4	Represents RSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs described in footnotes 1, 2 and 3, exempt under Rule 16b-3.