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ComEd Plans Electrical Substation at Former Home of CME Trading Floor

Commonwealth Edison has paid $39.5 million for the 288,000-square-foot 333 S. LaSalle St., which formerly housed CME Group’s historic trading floor, Crain’s Chicago Business reported. ComEd plans to turn it into a new electrical substation slated to open in 2026. 

The sale marked a formal end to an era of open-outcry trading pits, in keeping with CME Group’s announcement last May. Its in-person trading floors were shuttered at the beginning of the pandemic, and the exchange later said almost all of those floors would be permanently closed. 

For ComEd, the trading-floor building will help it address a need to meet growing demand for power. 

“This new space in the former trading pits of the Chicago Board of Trade will allow for the expansion of our electric facilities so we can continue to reliably power downtown Chicago and provide resiliency to extreme weather,” the company said in a statement. 

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About Paul Bubny

Paul Bubny serves as Senior Content Director for Connect Commercial Real Estate, a role to which he brings 16-plus years’ experience covering the commercial real estate industry and 30-plus years in business-to-business journalism. In this capacity, he oversees daily operations while also reporting on both local/regional markets and national trends, covering individual transactions across all property types, as well as delving into broader subject matter. He produces 7-10 daily news stories per day and works with the Connect team and clients to develop longer-form content, ranging from Q&As to thought-leadership pieces. Prior to joining Connect, Paul was Managing Editor for both Real Estate Forum and GlobeSt.com at American Lawyer Media, where he oversaw operations at both publications while also producing daily news and feature-length articles. His tenure in B2B publishing stretches back into the print era, and he has served as Editor in Chief on four national trade publications. Since 1999, Paul has volunteered as the newsletter editor of passenger rail advocacy groups (one national, one local).

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  • ◦Development