59. AECOM Technology
AECOM is an engineering firm that has over 87,000 employees. They design and build infrastructure in over 150 countries like skyscrapers, stadiums, bridges, tunnels, energy plants, and more. In 2019, they scored the 157th spot in the Fortune 500.
According to their records, the company reported $18 billion in revenue in 2017 and did just as well in 2018. Despite being such a worldwide powerhouse, it was still able to report the following on their taxes.
Federal Tax: $-122
Effective Tax Rate: -51%