Disney Buys Fox

In late 2017, Disney agreed to buy most of 21st Century Fox for about $52 billion. Rupert Murdoch wanted scale, a streaming future, and a clean outcome for his family, and Disney fit. Then Comcast's Brian Roberts saw the same rare assets and crashed the party with a competing bid. Disney raised, Comcast raised, and Disney ultimately won at roughly $71 billion, closer to $85 billion once Fox's debt was counted. The price had climbed nearly 40 percent from where it started, and whether Disney overpaid is still argued today.

For founders and operators, this is a case about what happens to your judgment inside a contested auction, when "what is this worth to us" quietly becomes "how do we beat them." It sharpens the discipline of setting a true ceiling before the bidding starts and treating the heat of competition as exactly what it is rather than as new information.