Six Flags executive chair buys 10,000 shares

Six Flags Entertainment Corporation/NEW executive chair Richard M. Haddrill bought additional shares of the company.

Rhea-AI Filing Summary

Six Flags Entertainment Corporation/NEW executive chair Richard M. Haddrill bought additional shares of the company. On May 12, 2026, he made an open-market purchase of 10,000 shares of common stock at $19.08 per share. Following this transaction, he directly owns 230,117 shares.

Insights

Insider trading analyst

Executive chair made a modest open-market share purchase.

Richard M. Haddrill, executive chair of Six Flags Entertainment Corporation/NEW, purchased 10,000 common shares in the open market at $19.08 per share. This is a straightforward, discretionary buy rather than a derivative exercise or tax-related transaction.

After the trade, he holds 230,117 shares directly, so the purchase increases but does not transform his equity exposure. With no derivatives reported in this filing and no 10b5-1 language in the footnotes, the transaction appears as a routine incremental ownership increase.

Insider Trade Summary

Net Buyer: 10,000 shares

Net Buy 1 txn

Insider HADDRILL RICHARD M

Role Executive Chair

Bought 10,000 shs ($191K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 per share	10,000	$19.08	$191K

Holdings After Transaction: Common Stock, par value $0.01 per share — 230,117 shares (Direct)

Key Figures

Shares purchased: 10,000 shares Purchase price: $19.08 per share Shares owned after: 230,117 shares +1 more

4 metrics

Shares purchased 10,000 shares Open-market purchase on May 12, 2026

Purchase price $19.08 per share Common Stock, par value $0.01 per share

Shares owned after 230,117 shares Direct holdings following transaction

Net buy shares 10,000 shares Net buy direction in transaction summary

Key Terms

open-market purchase, Common Stock, par value $0.01 per share, Form 4, transaction code "P"

4 terms

open-market purchase financial

"transaction_action": "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Common Stock, par value $0.01 per share financial

"security_title": "Common Stock, par value $0.01 per share""

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

transaction code "P" regulatory

"transaction_code": "P""

FAQ

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

What insider transaction did Six Flags (FUN) report for Richard M. Haddrill?

Six Flags reported that executive chair Richard M. Haddrill completed an open-market purchase of company stock. On May 12, 2026, he bought 10,000 shares of common stock, as disclosed in the Form 4 insider trading report filed with regulators.

How many Six Flags (FUN) shares did Richard M. Haddrill buy and at what price?

Richard M. Haddrill purchased 10,000 shares of Six Flags common stock. The open-market transaction was executed at a price of $19.08 per share, according to the Form 4 disclosure detailing his non-derivative common stock transaction on May 12, 2026.

What are Richard M. Haddrill’s Six Flags (FUN) holdings after this Form 4 transaction?

After the reported transaction, Richard M. Haddrill directly owns 230,117 shares of Six Flags common stock. This total reflects his position following the 10,000-share open-market purchase disclosed in the Form 4, which describes only direct, non-derivative holdings in this filing.

Was the latest Six Flags (FUN) insider trade by Richard M. Haddrill a purchase or sale?

The latest insider trade by Richard M. Haddrill was a purchase. The Form 4 classifies it as an open-market buy of 10,000 Six Flags common shares, using transaction code “P,” which denotes a purchase in the open market or a private transaction.

Did Richard M. Haddrill use derivatives in his recent Six Flags (FUN) transaction?

No, the recent transaction did not involve derivatives. The Form 4 shows a non-derivative acquisition of common stock, and the derivative summary section is empty, indicating no option exercises, warrant conversions, or other derivative-related trades in this particular filing.

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

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Accepted by SEC EDGAR 05/14/2026 - 05:09 PM EDT Learn about SEC filing dates

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^*

HADDRILL RICHARD M

(Last) (First) (Middle)

C/O SIX FLAGS ENTERTAINMENT CORPORATION

8701 RED OAK BLVD

(Street)

CHARLOTTE NORTH CAROLINA 28217

(City) (State) (Zip)

UNITED STATES

(Country)

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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive Chair

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

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

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01 per share	05/12/2026		P		10,000	A	$19.08	230,117	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:

Remarks:

	/s/ Richard M. Haddrill	05/14/2026
	** 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).
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)