Largest companies by operating income

Companies ranked by operating income, in USD

Company	Op. income (TTM)	Sector	Industry	Country	Exchange
1DALDELTA AIR LINES, INC.	$5.52B	Industrials	Airlines	United States	NYSE
2FDXFEDEX CORP	$5.46B	Industrials	Airlines	United States	NYSE
3UALUnited Airlines Holdings, Inc.	$4.87B	Industrials	Airlines	United States	Nasdaq

U.S.-exchange common stocks; ADRs and funds excluded. 3 companies. Reported USD values. TTM means trailing twelve months; companies without a comparable value are excluded.