Six Flags CCO reports tax-related share disposition

Six Flags Entertainment Corporation/NEW Chief Commercial Officer Christian Dieckmann reported a tax-related share disposition.

Accepted by SEC EDGAR 02/25/2026 - 04:19 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Six Flags Entertainment Corporation/NEW Chief Commercial Officer Christian Dieckmann reported a tax-related share disposition. On February 23, 2026, 3,887 shares of common stock were withheld at $18.24 per share to cover tax liabilities tied to vesting restricted stock and restricted stock units, leaving 37,404 shares owned directly.

Insider Trade Summary

Exercise Price or Tax Liability: 3,887 shares

Exercise Price or Tax Liability 1 txn

Insider Dieckmann Christian

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock, par value $0.01 per share	3,887	$18.24	$71K

Holdings After Transaction: Common Stock, par value $0.01 per share — 37,404 shares (Direct)

Holdings Before and After: Common Stock, par value $0.01 per share, 41,291 to 37,404 shares (Direct)

Footnotes (1)

1. F1. Shares withheld in payment of tax liability in connection with the vesting of a previously reported awards of restricted stock and restricted stock units, which vested February 23, 2026.

FAQ

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

What insider transaction did Six Flags (FUN) report for Christian Dieckmann?

Christian Dieckmann reported a tax-withholding disposition of 3,887 Six Flags shares. The shares were withheld to satisfy tax liabilities when previously granted restricted stock and restricted stock units vested on February 23, 2026, rather than being sold in an open-market transaction.

Was the Six Flags (FUN) insider transaction an open-market sale?

No, the transaction was not an open-market sale. The 3,887 Six Flags shares were withheld to pay tax liabilities related to vesting restricted stock and restricted stock units, as indicated by transaction code F and the accompanying footnote in the Form 4 filing.

How many Six Flags (FUN) shares were involved in Christian Dieckmann’s Form 4 filing?

The Form 4 shows 3,887 Six Flags common shares withheld at $18.24 per share. These shares covered tax liabilities on vesting equity awards, and after the transaction Dieckmann directly owned 37,404 shares of Six Flags common stock, according to the reported ownership line.

What does transaction code F mean in the Six Flags (FUN) Form 4?

Transaction code F indicates shares used to pay an exercise price or tax liability. In this Six Flags filing, 3,887 shares were withheld specifically to cover tax obligations when previously reported restricted stock and restricted stock units vested on February 23, 2026.

What is Christian Dieckmann’s role at Six Flags (FUN) in this Form 4 filing?

Christian Dieckmann is identified as an officer of Six Flags, serving as Chief Commercial Officer. The Form 4 reports his direct ownership of common stock and a tax-withholding disposition related to vesting restricted stock and restricted stock unit awards on February 23, 2026.

How many Six Flags (FUN) shares does Christian Dieckmann own after the reported transaction?

After the tax-withholding disposition, Christian Dieckmann directly owns 37,404 Six Flags common shares. This post-transaction ownership figure comes from the Form 4 and reflects his holdings following the 3,887-share withholding to satisfy tax liabilities on vesting equity awards.

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

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SEC Form 4

FORM 4

UNITED 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^*

Dieckmann Christian

(Last) (First) (Middle)

8701 RED OAK BLVD.

(Street)

CHARLOTTE NC 28217

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Commercial Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

4. 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 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01 per share	02/23/2026		F		3,887(1)	D	$18.24	37,404	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares withheld in payment of tax liability in connection with the vesting of a previously reported awards of restricted stock and restricted stock units, which vested February 23, 2026.

Remarks:

	/s/ Christian Dieckmann	02/24/2026
	** 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 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).
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