Rush Island Decided It Had Enough Fun With Six Flags Stock

Rush Island Management disclosed in an SEC filing that it sold 3,306,963 shares of Six Flags Entertainment (FUN) during Q3 — roughly $104 million based on the quarter’s average price — trimming its holding to 487,121 shares valued at $11.07 million as of Sept. 30 and reducing FUN’s weighting in its 13F-reportable AUM from 7.5% to 0.76% (the sale represented about 6% of reportable AUM). Six Flags trades at $14.60 (market cap $1.48 billion), is down about 69% year-to-date with TTM revenue of $3.14 billion and a TTM net loss of $1.75 billion, and the divestment coincided with board/executive changes (executive chairman Selim Bassoul and lead director departures announced Oct. 10 and John Reilly named CEO Nov. 24). The move signals a loss of conviction by a previously concentrated holder and is a position to watch for potential repurchases or further liquidation in upcoming filings given the management shakeup and the stock’s steep drawdown.

Analysis

Rush Island Management disclosed in an SEC filing dated Nov. 14, 2025 that it sold 3,306,963 shares of Six Flags Entertainment (FUN) during Q3, reducing its holding to 487,121 shares valued at $11.07 million as of Sept. 30 and shrinking FUN’s weight in the fund’s 13F-reportable AUM from 7.5% to 0.76%; the sale represented roughly $104 million based on the quarter’s average share price and about 6% of reportable AUM. Six Flags’ market data in the article show a market close price of $14.60, market capitalization of $1.48 billion, TTM revenue of $3.14 billion and a TTM net loss of $1.75 billion, and the stock is reported down ~69% year-to-date.

The timing of the liquidation precedes material governance moves: the company announced Oct. 10 that Executive Chairman Selim Bassoul and lead independent director would step down at year-end, and on Nov. 24 named John Reilly as CEO. The transaction and a moderately negative sentiment score (-0.45 overall, -0.6 for FUN) signal a loss of conviction by a previously concentrated holder and increase the probability of further position adjustments or opportunistic repurchases depending on new management actions.

For investors, the key implications are that material operational and governance risk remain unresolved and that the combination of severe YTD price decline and a large TTM net loss elevates downside risk; the next filings and early actions by the new CEO will be the most informative near-term catalysts. Monitor liquidity, potential follow-on selling from institutional holders, and require demonstrable financial improvement before increasing exposure.

Key Decisions for Investors

• Monitor Rush Island's next 13F and any 13D/insider filings to detect whether the fund repurchases shares or continues to liquidate, because the Q3 sale dramatically reduced its FUN weighting
• Require visible operational or governance catalysts under new CEO John Reilly—improving quarterly results or a credible path to profitability—before initiating or increasing a meaningful long position given the 69% YTD decline and $1.75 billion TTM net loss
• If maintaining exposure, size positions conservatively and use downside protection or strict stop-losses to manage risk from potential continued selling and weak fundamentals
• Consider reallocating capital to higher-conviction names or hold cash until post-management-change execution and balance-sheet signals are clearer