From a review of companiesmarketcap.com, of valuetoday.com and of Google Finance websites and of SEC filings, there were 25 Companies headquartered in Illinois with recent stock markets caps above $20 Bil.
From Company financial Statements contained in the SEC website, the table below shows the Audited Gold-Standard US GAAP Consolidated Net Income (Loss) from Continuing Operations for each of these 25 largest Illinois Companies for annual year 2021, Biden's first year in office, for 2020, Trump's last year in office, for 2016, Obama's last year in office and for 2008, Bush's last year in office.
There are 2 of these 25 Companies that had very significant separations which made their reported 2008 earnings amounts not meaningful in comparison to their more recent years' earnings amounts and thus their reported 2008 earnings are excluded from the below table.
