Investors may want to consider joining Travis Kelce and Jana Partners in buying shares of Six Flags Entertainment following its 76% decline from its 2024 high.JANA Partners Management disclosed a new position in Six Flags Entertainment Corporation (FUN +0.29%), adding 4,049,940 shares, an estimated $92.01 million, in its Nov. 14, 2025, SEC filing.What happenedAccording to a filing with the Securities and Exchange Commission dated Nov. 14, 2025, JANA Partners initiated a new equity stake in Six Flags Enterta ...