Six Flags (FUN) President & CEO John Reilly Files Form 3 With No Owned Shares

Rhea-AI Filing Summary

Six Flags Entertainment Corporation reported an initial insider ownership filing for John Reilly, who serves as both a Director and the company’s President & CEO. The event date for this status is December 8, 2025. According to the disclosure, no securities are beneficially owned by John Reilly, so both the non-derivative and derivative ownership tables show no holdings.

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^*

Reilly John T

(Last) (First) (Middle)

C/O SIX FLAGS ENTERTAINMENT CORPORATION

8701 RED OAK BLVD

(Street)

CHARLOTTE NC 28217

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
12/08/2025

3. Issuer Name and Ticker or Trading Symbol
Six Flags Entertainment Corporation/NEW [ FUN ]

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

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:

Remarks:

No securities are beneficially owned.

	/s/ John Reilly	12/09/2025
	** 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 does this Form 3 filing reveal about Six Flags (FUN) leadership?

The filing identifies John Reilly as a Director and the President & CEO of Six Flags Entertainment Corporation as of December 8, 2025.

How many Six Flags (FUN) shares does John Reilly own according to this filing?

The filing states that no securities are beneficially owned by John Reilly, so it reports no share ownership.

What is the significance of the December 8, 2025 date in the Six Flags (FUN) Form 3?

December 8, 2025 is the date of the event requiring the statement, marking when John Reilly’s reportable status as an insider is recorded.

Is the Six Flags (FUN) Form 3 filed by one reporting person or a group?

The document indicates that it is a Form filed by one reporting person, covering only John Reilly.

Does the Form 3 for Six Flags (FUN) show any derivative securities for John Reilly?

No. The derivative securities section is present, but the remarks clarify that no securities are beneficially owned, so no derivative positions are listed.

What roles does John Reilly hold at Six Flags (FUN) according to this filing?

John Reilly is reported as both a Director and an Officer, specifically the company’s President & CEO.