[1] at the time of its construction. It was for a short time, the tallest building west of the mississippi river. When shorenstein bought the exxon building, houston’s office market was soaring because fracking created a renewed surge in the oil business But oil prices took a nosedive in 2015 and houston office vacancy escalated at a frightening pace as energy firms shed excess office space. Exxon mobil has officially relocated its corporate headquarters to its campus outside houston, according to a recent filing with the u.s
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