[Form 3] Sphere Entertainment Co. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

The Marianne E. Dolan Weber 2012 Descendants Trust filed a Form 3 for Sphere Entertainment Co. (SPHR) reporting that, as of the event date 09/08/2025, no securities are beneficially owned. The filing is an initial statement under Section 16 and was signed by Brian G. Sweeney as attorney‑in‑fact on 09/10/2025. The form lists the trust's address in Yorktown Heights, NY 10598 and indicates the filing was made by one reporting person.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Marianne E. Dolan Weber 2012 Descendants Trust

(Last) (First) (Middle)

C/O RICHARD BACCARI

MLC VENTURES LLC, PO BOX 1014

(Street)

YORKTOWN HEIGHTS NY 10598

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/08/2025

3. Issuer Name and Ticker or Trading Symbol
Sphere Entertainment Co. [ SPHR ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Member of 13(d) Group

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	MARIANNE E. DOLAN WEBER 2012 DESCENDANTS TRUST By: /s/ Brian G. Sweeney, Attorney-in-fact	09/10/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did the Form 3 for Sphere Entertainment (SPHR) report?

The Form 3 states that the Marianne E. Dolan Weber 2012 Descendants Trust beneficially owns no securities of Sphere Entertainment as of 09/08/2025.

Who filed the Form 3 for SPHR and when was it signed?

The filing lists the reporting person as the Marianne E. Dolan Weber 2012 Descendants Trust and was signed by Brian G. Sweeney as attorney‑in‑fact on 09/10/2025.

Does the Form 3 show any derivative or direct holdings for SPHR?

No. The Form 3 explicitly states "No securities are beneficially owned." There are no direct or derivative holdings listed.

What address is shown for the reporting person on the SPHR Form 3?

The reporting person address is shown as MLC Ventures LLC, PO Box 1014, Yorktown Heights, NY 10598 (c/o Richard Baccari).

Was the Form 3 filed by an individual or jointly for SPHR?

The form indicates it was filed by one reporting person (not a joint/group filing).