From a review of Company SEC filings and the Google Finance website, I found 60 Houston, Texas Area Companies with stock market caps of above $1 bil in early June 2020. Of these 60 Houston, Texas Area Companies, 34 were Oil & Gas Companies and 26 were Non-Oil & Gas Companies.
The table below shows the Gold-Standard US GAAP Pretax Income (Loss) From Continuing Operations for the second and first quarters of both 2020 and 2019 for each of these 60 excellent Houston, Texas Area Companies.