David Granville-Smith - 13 Mar 2026 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: 13 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 17 Mar 2026, 16:05:04 UTC
Previous 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 Mar 2026	0001980544

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SPHR	Class A Common Stock	Options Exercise		+6,704	+13%	$0.000000^*	60,152	13 Mar 2026	Direct	F1
transaction	SPHR	Class A Common Stock	Tax liability		-3,688	-6.1%	$105.70^*	56,464	13 Mar 2026	Direct	F2

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		-6,704	-33%	$0.000000^*	13,410	13 Mar 2026	Class A Common Stock	6,704		Direct	F1

* 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 March 12, 2025 under the Sphere Entertainment Co. ("SPHR") 2020 Employee Stock Plan, as amended 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 March 13, 2026. One-third of the RSUs are scheduled to vest and settle on March 15, 2027. The remaining one-third of the RSUs are scheduled to vest and settle on March 15, 2028.
F2	Represents RSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs described in footnote 1, exempt under Rule 16b-3.

Content

Each restricted stock unit ("RSU") was granted on March 12, 2025 under the Sphere Entertainment Co. ("SPHR") 2020 Employee Stock Plan, as amended 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 March 13, 2026. One-third of the RSUs are scheduled to vest and settle on March 15, 2027. The remaining one-third of the RSUs are scheduled to vest and settle on March 15, 2028.

Represents RSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs described in footnote 1, exempt under Rule 16b-3.