The top 10 technology companies in the USA were:
[Note that rankings and company status might have changed since then. I recommend checking the latest sources for the most up-to-date information.]
1. Apple

About Apple company full details click here
2. Microsoft

About Microsoft company full details click here
3. Amazon

About Amazon company full details click here
4. Alphabet Inc. (Google)

About Google Inc company full details click here
5. Facebook (now Meta Platforms, Inc.)

About (now Meta Platforms, Inc.) company full details click here
6. Intel

About Intel company full details click here
7. Cisco Systems

About Cisco Systems company full details click here
8. Oracle

About OracleSystems company full details click here
9. IBM

About IBM company full details click here
10. Qualcomm

About Qualcomm company full details click here