Chicago’s biggest companies are raking it in. Here’s what’s driving the profit boom.

Corporate America's bottom line is booming on the back of a resurgent economy and the prospect that the good times are just getting started. In Chicago, industry leaders Abbvie, Boeing, CME and Exelon led the pack of highest profit earners.

As of May 23, some 3,193 publicly traded U.S. companies had closed the books on 2018's first fiscal quarter, reporting combined net income of $358.3 billion during the three-month span. The total marked a 26 percent year-over-year surge over the group's tally…

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