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Sphere COO Koester vests 47,573 stock units

Sphere Entertainment’s president and COO received vested equity in SPHR, with a substantial portion of shares withheld to cover tax obligations.

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Sphere Entertainment Co. (SPHR) reported that President & COO, Sphere, Jennifer Koester had restricted stock units and performance restricted stock units vest and settle into 47,573 shares of Class A Common Stock on September 15, 2026. In connection with these vestings, 24,284 shares were withheld to satisfy tax withholding obligations, and the reported performance units were deemed earned at 100% of target. No Rule 10b5-1 trading plan is reported.

Positive

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Negative

  • None.
Insider Koester Jennifer
Role President & COO, Sphere
Type Security Shares Price Value
Exercise Restricted Stock Units F1 11,988 $0.00 $0.00
Exercise Restricted Stock Units F1 6,829 $0.00 $0.00
Exercise Restricted Stock Units F2 8,269 $0.00 $0.00
Exercise Performance Restricted Stock Units F4 20,487 $0.00 $0.00
Exercise Class A Common Stock F1 11,988 $0.00 $0.00
Exercise Class A Common Stock F1 6,829 $0.00 $0.00
Exercise Class A Common Stock F2 8,269 $0.00 $0.00
Tax Withholding Class A Common Stock F3 13,826 $144.12 $1.99M
Exercise Class A Common Stock F4 20,487 $0.00 $0.00
Tax Withholding Class A Common Stock F5 10,458 $144.12 $1.51M
Holdings After Transaction: Restricted Stock Units — 8,270 contracts (Direct); Performance Restricted Stock Units — 0 contracts (Direct); Class A Common Stock — 54,207 shares (Direct)
Footnotes (5)
  1. F1. Each restricted stock unit ("RSU") was granted on April 22, 2024 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 vested and were settled on September 15, 2026.
  2. F2. 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 vested and were settled on September 15, 2026. The remaining one-third of the RSUs are scheduled to vest and settle on September 15, 2027.
  3. F3. Represents RSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs described in footnotes 1 and 2, exempt under Rule 16b-3.
  4. F4. Each performance restricted stock unit ("PSU") was granted on April 22, 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. The Compensation Committee of the Board of Directors of SPHR deemed such PSUs earned at 100% of target. The PSUs vested and were settled on September 15, 2026.
  5. F5. Represents PSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of PSUs described in footnote 4, exempt under Rule 16b-3.
Shares issued from RSU and PSU vesting 47,573 shares Class A Common Stock delivered upon vesting and settlement on September 15, 2026
Shares withheld for tax obligations 24,284 shares Shares withheld to satisfy tax withholding obligations related to RSUs and PSUs
RSU shares withheld for taxes 13,826 shares Class A Common Stock withheld in connection with RSU vesting, at $144.12 per share
PSU shares withheld for taxes 10,458 shares Class A Common Stock withheld in connection with PSU vesting, at $144.12 per share
Tax withholding price per share $144.12 per share Applied to RSU and PSU shares withheld for tax liabilities on September 15, 2026
PSU achievement level 100% Performance restricted stock units deemed earned at 100% of target by the Compensation Committee
Derivative exercises 47,573 shares Total underlying shares from derivative exercises (RSUs and PSUs) reported in the transaction summary
Restricted Stock Units financial
"Each restricted stock unit ("RSU") was granted on April 22, 2024"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
Performance Restricted Stock Units financial
"Each performance restricted stock unit ("PSU") was granted on April 22, 2024"
Performance restricted stock units (PRSUs) are promises to deliver company shares to employees or executives only if the business meets specific performance targets and any time-based holding rules. Think of them as a bonus that converts into stock only after set goals are reached, so investors watch PRSUs for two reasons: they can dilute existing shares if paid out, and they signal how closely management’s pay is tied to company performance.
2020 Employee Stock Plan financial
"under the Sphere Entertainment Co. ("SPHR") 2020 Employee Stock Plan"
Rule 16b-3 regulatory
"withheld to satisfy tax withholding obligations ... exempt under Rule 16b-3"
Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity awards vested for SPHR executive Jennifer Koester on September 15, 2026?

On September 15, 2026, 47,573 shares of Sphere Entertainment Co. Class A Common Stock were issued to Jennifer Koester upon vesting and settlement of RSUs and PSUs granted under the 2020 Employee Stock Plan.

How many SPHR shares were withheld for taxes in this Form 4?

A total of 24,284 shares of Sphere Entertainment Co. Class A Common Stock were withheld to satisfy tax withholding obligations related to the vesting of RSUs and PSUs, consisting of 13,826 RSU shares and 10,458 PSU shares.

Were the SPHR performance stock units earned at, above, or below target?

The Compensation Committee deemed the performance restricted stock units earned at 100% of target. These PSUs, granted on April 22, 2024, then vested and were settled into shares of Class A Common Stock on September 15, 2026.

Did this SPHR Form 4 report any open-market purchases or sales by the executive?

No. The filing reports exercises and settlements of RSUs and PSUs and the withholding of shares for tax liabilities. It does not report any open-market purchases or sales of Sphere Entertainment Co. stock.

Was a Rule 10b5-1 trading plan used for these SPHR transactions?

No. The Form 4 indicates that the Rule 10b5-1 checkbox is not marked, so no Rule 10b5-1 trading plan is reported in connection with these RSU and PSU vesting transactions.

Under which plan were Jennifer Koester’s SPHR RSUs and PSUs granted?

The RSUs and PSUs reported for Jennifer Koester were granted under the Sphere Entertainment Co. 2020 Employee Stock Plan, as described in the footnotes to the Form 4.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Koester Jennifer

(Last)(First)(Middle)
TWO PENNSYLVANIA PLAZA

(Street)
NEW YORK NEW YORK 10121

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Sphere Entertainment Co. [ SPHR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
President & COO, Sphere
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock09/15/2026M11,988A$0(1)42,906D
Class A Common Stock09/15/2026M6,829A$0(1)49,735D
Class A Common Stock09/15/2026M8,269A$0(2)58,004D
Class A Common Stock09/15/2026F(3)13,826D$144.1244,178D
Class A Common Stock09/15/2026M20,487A$0(4)64,665D
Class A Common Stock09/15/2026F(5)10,458D$144.1254,207D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)09/15/2026M11,988 (1)09/15/2026Class A Common Stock11,988$0.000D
Restricted Stock Units(1)09/15/2026M6,829 (1)09/15/2026Class A Common Stock6,829$0.000D
Restricted Stock Units(2)09/15/2026M8,269 (2)09/15/2027Class A Common Stock8,269$0.008,270D
Performance Restricted Stock Units(4)09/15/2026M20,487 (4)09/15/2026Class A Common Stock20,487$0.000D
Explanation of Responses:
1. Each restricted stock unit ("RSU") was granted on April 22, 2024 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 vested and were settled on September 15, 2026.
2. 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 vested and were settled on September 15, 2026. The remaining one-third of the RSUs are scheduled to vest and settle on September 15, 2027.
3. Represents RSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs described in footnotes 1 and 2, exempt under Rule 16b-3.
4. Each performance restricted stock unit ("PSU") was granted on April 22, 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. The Compensation Committee of the Board of Directors of SPHR deemed such PSUs earned at 100% of target. The PSUs vested and were settled on September 15, 2026.
5. Represents PSUs of SPHR withheld to satisfy tax withholding obligations in connection with the vesting and settlement of PSUs described in footnote 4, exempt under Rule 16b-3.
/s/ Mark C. Cresitello, Attorney-in-Fact for Jennifer Koester09/17/2026
** Signature of Reporting PersonDate
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 4 (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.
* Form 4: SEC 1474 (03-26)

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