[144] Sphere Entertainment Co. SEC Filing

Rhea-AI Filing Summary

Sphere Entertainment Co. (SPHR) filed a Form 144 reporting a proposed sale of 8,500 Class A shares through Fidelity Brokerage Services LLC on the NYSE, with an aggregate market value of $531,250 and an approximate sale date of 09/18/2025. The shares were acquired on 09/15/2024 from the issuer as restricted stock vesting and were paid as compensation.

The filing also discloses a sale by the same account holder of 17,620 Class A shares on 09/11/2025 for gross proceeds of $1,019,317. The filer certifies they have no undisclosed material adverse information about the issuer.

Insights

Securities Compliance Analyst

TL;DR: Routine insider sale filing for vested restricted shares; disclosure aligns with Rule 144 requirements.

The Form 144 documents a standard notice of proposed sale under Rule 144 for 8,500 vested restricted Class A shares acquired as compensation. The filing identifies the broker, approximate sale date, acquisition date and nature (restricted stock vesting), and includes recent sale activity. From a compliance perspective, the form provides the required elements for public notice and the signer attests to absence of undisclosed material information. There is no indication in the filing of any exceptional trading arrangements or nonstandard consideration.

Equity Research Associate

TL;DR: Insider liquidity event disclosed; size appears modest based on reported counts.

The notice shows a proposed sale worth $531,250 and a recent sale of $1,019,317. The filing lists total outstanding Class A shares as 29,132,663, which suggests the reported transactions are small in relation to total shares outstanding. The disclosure is factual and limited to transaction mechanics; it does not provide operational or financial performance data. As such, the filing itself is unlikely to be material to SPHR's valuation absent additional context.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	8500	531250.00	29132663	09/18/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	09/15/2024	Restricted Stock Vesting	Issuer			8500	09/15/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Andrea M. Greenberg Two Penn Plaza New York NY 10121	Class A	09/11/2025	17620	1019317.00

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does SPHR's Form 144 disclose about the proposed sale?

Answer: The filing reports a proposed sale of 8,500 Class A shares via Fidelity Brokerage Services on the NYSE, valued at $531,250, with an approximate sale date of 09/18/2025.

How and when were the shares being sold on SPHR acquired?

Answer: The 8,500 shares were acquired on 09/15/2024 as restricted stock vesting from the issuer and were paid as compensation.

Did the filer sell any SPHR shares recently?

Answer: Yes, the filing discloses a sale of 17,620 Class A shares on 09/11/2025 with gross proceeds of $1,019,317.

Who is the broker handling the proposed SPHR sale?

Answer: The broker listed is Fidelity Brokerage Services LLC, located at 900 Salem Street, Smithfield, RI, and the securities exchange is the NYSE.

What does the filer certify in the remarks section of the Form 144?

Answer: The filer represents by signing the notice that they do not know any material adverse information about the issuer that has not been publicly disclosed.