GRANVILLE-SMITH DAVID (Executive Vice President) exercised options at SPHERE ENTERTAINMENT CO.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 4 exercises

GRANVILLE-SMITH DAVID

Filed: 9/17/2026ACC: 0001193125-26-394327

InsiderGRANVILLE-SMITH DAVIDCIK 1980544

→

IssuerSPHERE ENTERTAINMENT CO.CIK 1795250

Officer· Executive Vice President

Since Mar 2026

-47.46K

Net shares

Net seller

$6.84M

Total sold

Open market trades

0B · 0S

Total transactions

85.82K acquired · 133.27K disposed

Non-Derivative Transactions6

Class A Common Stock

Direct

M · Option Exercise

+46.74K

Price / share

—

Trade value

—

% of position

82.8%

9/15/2026

56.46K→103.21K

Class A Common Stock

Direct

M · Option Exercise

+8.97K

Price / share

—

Trade value

—

% of position

8.7%

9/15/2026

103.21K→112.17K

Class A Common Stock

Direct

M · Option Exercise

+3.21K

Price / share

—

Trade value

—

% of position

2.9%

9/15/2026

112.17K→115.39K

Class A Common Stock

Direct

F · Tax Withholding

−32.58K

Price / share

$144.12

Trade value

$4.70M

% of position

28.2%

9/15/2026

115.39K→82.80K

Class A Common Stock

Direct

M · Option Exercise

+26.90K

Price / share

—

Trade value

—

% of position

32.5%

9/15/2026

82.80K→109.70K

Class A Common Stock

Direct

F · Tax Withholding

−14.87K

Price / share

$144.12

Trade value

$2.14M

% of position

13.6%

9/15/2026

109.70K→94.83K

Total

Net shares

+38.36K

Net value

-$6.84M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	9/15/2026	M · Option Exercise	+46.74K	—	—	82.8%	56.46K	103.21K
Class A Common Stock Direct	9/15/2026	M · Option Exercise	+8.97K	—	—	8.7%	103.21K	112.17K
Class A Common Stock Direct	9/15/2026	M · Option Exercise	+3.21K	—	—	2.9%	112.17K	115.39K
Class A Common Stock Direct	9/15/2026	F · Tax Withholding	−32.58K	$144.12	$4.70M	28.2%	115.39K	82.80K
Class A Common Stock Direct	9/15/2026	M · Option Exercise	+26.90K	—	—	32.5%	82.80K	109.70K
Class A Common Stock Direct	9/15/2026	F · Tax Withholding	−14.87K	$144.12	$2.14M	13.6%	109.70K	94.83K
Total			+38.36K		-$6.84M

Derivative Transactions4

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

46.74K shares

−46.74K

Strike price

Held after

0.00

Exercisable

—

9/15/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

8.97K shares

−8.97K

Strike price

Held after

0.00

Exercisable

—

9/15/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

3.21K shares

−3.21K

Strike price

Held after

3.21K

Exercisable

—

9/15/2026

Performance Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

26.90K shares

−26.90K

Strike price

Held after

0.00

Exercisable

—

9/15/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Class A Common Stock46.74K shares	9/15/2026	M · Option Exercise	−46.74K	—	0.00
Restricted Stock Units Direct	Class A Common Stock8.97K shares	9/15/2026	M · Option Exercise	−8.97K	—	0.00
Restricted Stock Units Direct	Class A Common Stock3.21K shares	9/15/2026	M · Option Exercise	−3.21K	—	3.21K
Performance Restricted Stock Units Direct	Class A Common Stock26.90K shares	9/15/2026	M · Option Exercise	−26.90K	—	0.00