The sweeping tax bill passed in 2017 by a Republican Congress and signed into law by President Donald J. Trump reduced the corporate tax rate to 21 percent from 35 percent. But dozens of Fortune 500 companies were able to further shrink their tax bill — sometimes to zero — thanks to a range of legal deductions and exemptions that have become staples of the tax code, according to the analysis.

Salesforce, Archer-Daniels-Midland and Consolidated Edison were among those named in the report, which was done by the Institute on Taxation and Economic Policy, a left-leaning research group in Washington.

Twenty-six of the companies listed, including FedEx, Duke Energy and Nike, were able to avoid paying any federal income tax for the last three years even though they reported a combined income of $77 billion. Many also received millions of dollars in tax rebates.