The 10 Largest Iowa Companies 1Q 2020 Total Pretax Earnings Declined Precipitously By 163% From the 1Q 2019. Total Pretax Earnings of $1.477 Bil in the 1Q 2019 Reversed Course to Total Pretax Losses of $935 Mil in the 1Q 2020. However, In the Tough Covid-19 Environment For Customers, Casey's General Stores Elected To Rip Off Its Customers and Thereby Earned Gas Margins of 40.8 cents per gallon in the April 2020 Quarter as compared to earning only 18.6 cents per gallon in the April 2019 Quarter.

From a review of Company SEC filings and the Google Finance website, I found 10 Iowa Companies with stock market caps above $1 bil recently.  

The table below shows the US GAAP Pretax Income (Loss) From Continuing Operations for the first quarter of both 2020 and 2019 for each of these 10 Iowa Companies.

		US	US
		GAAP	GAAP
		Pretax	Pretax
		Income	Income
		(Loss)	(Loss)	Better
		First	First	(Worse)
		Quarter	Quarter	%
Iowa Largest Companies		2020	2019	Change
Market Caps Above $1 Bil	City HQs	mils $	mils $
Principal Financial	Des Moines	328	526
American Equity Investment Life	West Des Moines	270	(39)
Casey's General Stores	Ankeny	79	30
Renewable Energy Group	Ames	78	(42)
Heartland Financial USA	Dubuque	26	40
Winnebago Industries	Forest City	21	25
Heartland Express	North Liberty	18	22
Workiva	Ames	(10)	(7)
HNI Corp	Muscatine	(26)	2
FGL Holdings	Des Moines	(337)	180
Athene Holding Ltd	West Des Moines	(1,382)	740
Total all 10 Iowa Companiess		(935)	1,477	-163%