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Six Flags Entertainment Corporation/NEW (FUN) SEC Filings, Oct-Dec 2025

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Welcome to our dedicated page for Six Flags Entertainment Corporation/NEW SEC filings (Ticker: FUN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.

Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on Six Flags Entertainment Corporation/NEW's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.

Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time SEC filing updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into Six Flags Entertainment Corporation/NEW's regulatory disclosures and financial reporting.

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Six Flags Entertainment Corporation reported an equity award to its President & CEO and Director, John Reilly. On 12/08/2025, he received 159,847 shares of common stock in the form of restricted stock units (RSUs) at a price of $0 per share, bringing his directly held beneficial ownership reported here to 159,847 shares.

The RSUs were granted under the company’s 2024 Omnibus Incentive Plan. Each RSU represents a contingent right to receive one share of common stock and will vest in three equal annual installments on each of the first three anniversaries of the grant date, conditioned on Mr. Reilly’s continued service.

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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.

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Six Flags Entertainment Corporation reported an insider equity transaction by its President & CEO and director following his departure from the company. On December 5, 2025, the executive had 114,531 shares of common stock withheld to cover taxes tied to accelerated vesting of previously reported restricted stock awards, and later in the day held 602,697 shares directly. He also received 298,190 shares at no cost upon accelerated vesting and settlement of previously unreported performance stock units, increasing his direct holdings to 900,887 shares. A further 130,310 shares were then withheld for tax on that PSU vesting, leaving the executive with 770,577 directly owned shares of Six Flags common stock.

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Six Flags Entertainment Corporation (FUN) announced that John Reilly will become President and Chief Executive Officer and join the Board as a Class III director effective December 8, 2025, succeeding Richard Zimmerman, who will leave his roles the same day. Reilly’s three-year employment agreement includes an initial annual base salary of $1,100,000, an annual bonus target of 150% of salary with a maximum of 300%, an annual equity grant starting in 2026 targeted at $5,625,000, and a day-one equity grant of $7,500,000 in restricted stock units and performance stock units vesting on the third anniversary, subject to continued service and performance goals.

If he is terminated without Cause or resigns for Good Reason, Reilly is eligible for cash severance equal to two times salary plus target bonus, certain bonus payments, medical coverage support for 18 months, and accelerated vesting of equity scheduled to vest within 18 months, with broader vesting if such a termination occurs within 12 months after a Change in Control. The company also approved retention bonuses payable on July 1, 2026 for six senior executives ranging from $450,000 to $750,000, and temporarily increased their cash severance to two times salary and target incentives for specified terminations between July 1, 2026 and June 30, 2027.

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Six Flags Entertainment Corporation (FUN) reported a challenging quarter while integrating its merger with Cedar Fair. Cedar Fair is the accounting acquirer, and the combined company now trades under “FUN.”

For the three months ended September 28, 2025, net revenues were $1,317.8 million versus $1,348.4 million a year ago. The quarter included $1,518.1 million of non-cash impairments across several Six Flags parks and trade names, driving an operating loss of $1,103.6 million and a net loss of $1,187.3 million (diluted EPS $(11.77)). For the nine months, operating cash flow was $365.1 million and capital expenditures were $408.1 million.

Balance sheet highlights show total notes and loans of $5,050.7 million (gross). The company added a $500 million term loan on June 27, 2025, redeemed the remaining $200 million of 2025 Six Notes, and ended the quarter with $112.0 million drawn on its revolver and $692.2 million of revolver availability. Current deferred revenue was $333.1 million. The company plans to close Six Flags America after the 2025 season. A $40.0 million securities class action settlement was approved in January 2025 and fully funded by insurance. Shares outstanding were 101,474,349 as of October 31, 2025.

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Morgan Stanley filed a Schedule 13G disclosing a passive stake in Six Flags Entertainment Corporation. The firm reported beneficial ownership of 5,695,414 shares, representing 5.6% of the company’s common stock as of the event date 09/30/2025. It reported shared voting power over 5,630,442 shares and shared dispositive power over 5,695,414 shares.

Separately, Morgan Stanley Capital Services LLC reported beneficial ownership of 5,489,443 shares, or 5.4%, with shared voting and shared dispositive power over the same 5,489,443 shares. The filing states the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control.

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Six Flags Entertainment Corporation (FUN) furnished materials related to its fiscal third-quarter 2025 results. The company issued a news release disclosing Q3 2025 performance and posted a slide presentation on its investor relations website. Both items are provided as exhibits and are designated as furnished, not deemed “filed” under Section 18 of the Exchange Act.

The news release is included as Exhibit 99.1 and the earnings call presentation as Exhibit 99.2. The materials may be used, in whole or in part, or with modifications, in presentations to investors, analysts and others. The report is signed by Chief Financial Officer Brian C. Witherow on November 7, 2025.

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Sachem Head–affiliated reporting persons filed a joint Form 3 for Six Flags Entertainment Corporation (FUN). The filing lists indirect beneficial ownership of 5,030,000 shares of common stock. It also discloses three cash‑settled total return swaps referencing an aggregate 4,995,000 shares, each with an expiration date of 06/03/2027 and reference prices of $28.6892, $28.6115, and $29.0555.

Jonathan Brudnick is identified as a director of the issuer. The joint filers include Sachem Head Capital Management LP, Uncas GP LLC, Sachem Head GP LLC, and Scott D. Ferguson, who may be deemed directors by deputization. The reporting persons disclaim beneficial ownership of the subject securities except to the extent of any pecuniary interest, and state the swaps do not confer voting, investment, or dispositive power over Six Flags securities.

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Rhea-AI Summary

Six Flags Entertainment Corporation (FUN) entered into a Cooperation Agreement with Sachem Head Capital Management, expanding its Board from 12 to 13 directors and appointing Jonathan Brudnick as a Class III director with a term expiring at the 2027 Annual Meeting. He also joins the Nominating and Governance Committee.

Mr. Brudnick delivered an irrevocable resignation letter effective upon the earliest of Sachem Head falling below a 3% beneficial ownership/economic exposure threshold or a final non‑appealable judgment finding an uncured material breach of the agreement. Until the standstill termination date, Sachem Head agreed to vote in line with the Board’s recommendations, with a carve‑out allowing proportional voting if ISS or Glass Lewis recommend otherwise on Company proposals (excluding director elections) and full discretion on extraordinary transactions. The agreement includes customary standstill and mutual non‑disparagement provisions and remains in place until 20 days after Mr. Brudnick ceases to serve.

The Company noted the Board will expand to 13 and, following previously announced departures, decrease to 11. A related press release was furnished as an exhibit.

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Six Flags Entertainment Corporation reported a governance update: the board designated a non-executive Chair position to take effect on January 1, 2026. The notice references a press release dated October 10, 2025 and identifies Brian C. Witherow as Chief Financial Officer. The filing is brief and does not disclose executive compensation changes, reasons for the governance move, or other operational or financial impacts. This appears to be a board leadership change announcement without accompanying financial metrics or major transactions.

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FAQ

How many Six Flags Entertainment Corporation/NEW (FUN) SEC filings are available on StockTitan?

StockTitan tracks 99 SEC filings for Six Flags Entertainment Corporation/NEW (FUN), including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, and Form 4 insider trading disclosures. Each filing includes AI-generated summaries, impact scoring, and sentiment analysis.

When was the most recent SEC filing for Six Flags Entertainment Corporation/NEW (FUN)?

The most recent SEC filing for Six Flags Entertainment Corporation/NEW (FUN) was filed on December 9, 2025.