Marvelの資本関係・沿革について、Marvel公式のプレスリリース（https://thewaltdisneycompany.com/disney-to-acquire-marvel-entertainment/）で確認できます。None of the three existing References (what Marvel is, MCU differentiator, where to watch) mention the Disney acquisition, its date, or its price, so this is a genuinely new fact.具体的には「August 31, 2009 —Building on its strategy of delivering quality branded content to people around the world, The Walt Disney Company (NYSE:DIS) has agreed to acquire Marvel Entertainment, Inc. (NYSE:MVL) in a stock and cash transaction, the companies announced today. ... Based on the closing price of Disney stock on Friday, August 28, the transaction value is $50 per Marvel share or approximately $4 billion.」といった記載が確認できます。限界として、この記述は当該Sourceの時点のものであり、その後の変更が反映されているとは限りません。 This is Disney's own announcement press release stating the deal terms at signing; the final completed deal terms (which closed December 31, 2009) could differ slightly from the initially announced $50/share estimate depending on Disney's stock price movement between announcement and closing.Current Statusとして、2026年08月27日に当該Sourceを取得し、上記の内容を確認しました。Source種別としては、これは提供元自身による自社情報の公表であり、第三者による独立した評価や市場での位置づけとは性質が異なります。