Over the past decade, most construction markets tracked by ENR have seen growth, or at least, relative stability for Top 400 firms. The notable exception is the petroleum market, which has shrunk from a high of $59 billion in 2013 overall firm revenue to just over $23 billion for reporting year 2020—a 59% drop over that time period.
The 2021 Top 400 list does not include McDermott International, last year’s top sector contractor with $6.8 billion in revenue. The return of Fluor Corp. and Worley to the list after their absence last year provides $4.6 billion in missing revenue. But even if McDermott's revenue from last year’s ranking was added to the 2021 results, petroleum revenue still would have fallen by almost $3 billion between 2019 and 2020.