In 1911 the US broke Standard Oil into 34 companies. Rockefeller got richer, and the pieces became Exxon, Mobil and Chevron

I made this one. It goes through the 5 moves Standard Oil used (railroad rebates, buying 22 of 26 Cleveland rivals in six weeks, vertical integration, etc.) and compares each with a modern case: Google paying Apple ~$20B for default search, Facebook buying Instagram and WhatsApp, Amazon vs. Diapers.com. All sources are in the description. Happy to hear where you think the comparison breaks down.