list of the five largest American companies by market cap at 25-year intervals since the year 1900…
1900
1. U.S. Steel
2. Standard Oil
3. American Tobacco Company
4. Pennsylvania Railroad
5. Union Pacific Railroad
1925
1. Standard Oil (now divided into smaller companies)
2. AT&T
3. General Motors
4. U.S. Steel
5. DuPont
1950
1. AT&T
2. General Motors
3. Exxon (formerly part of Standard Oil)
4. U.S. Steel
5. Sears, Roebuck & Co.
1975
1. IBM
2. Exxon
3. AT&T
4. General Motors
5. Standard Oil of Indiana (Amoco)
2000
1. Microsoft
2. General Electric
3. Cisco Systems
4. ExxonMobil
5. Intel
2023
1. Apple
2. Microsoft
3. Alphabet (Google)
4. Amazon
5. NVIDIA
And none manufacturer here in the usa all moved overseas