Company 1929 Revenues
Standard Oil (New Jersey) $1,523 (SO NJ > Exxon > merged with Mobil Oil to form ExxonMobil)
General Motors $1,504 (Reorganized in 2008, Still in Business)
Ford Motor $1,143 (Privately held until 50's Still in Business)
US Steel $1,097 (Still in Business)
Great Atlantic & Pacific Tea $1,054 (Out of Business 2015)
Swift & Co. $1,000 (Still in Business, Acquired by JBS SA in 2017 to form JBS USA)
Armour & Co. $1,000 (Bought by Greyhound in 1970, divested many ways, impractical to explain without a diagram - probably counts as out of business)
Standard Oil (Indiana) $495 (Amoco > Acquired by BP)
Sears, Roebuck $444 (Alive? maybe a zombie business)
General Electric $415
[0] https://en.wikipedia.org/wiki/Factoid