In 1995 Nvidia failed to deliver the chip Sega paid for.
Jensen Huang flew to Tokyo, admitted he picked the wrong architecture, and asked Sega to convert the $5M owed into equity.
He told them the money would probably be lost. Sega said yes anyway.
That $5M funded the RIVA 128. Yesterday Huang went back to the same Akihabara arcade to thank Irimajiri in person, 30 years later.
Nvidia survives, goes public. Sega sells early.
Held to today, that stake would be worth about $1 trillion.