Simple past tense and past participle of headquarter.(verb)
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Use "headquartered" in a sentence
"He led the group past three major record labels headquartered in New York City."
"While there, they picked up a copy of the company's financial statement, required to be filed by all companies "headquartered" in Belgium."
"I resumed practicing law at Dorsey and Whitney, a large international firm headquartered in Minneapolis, organized a public affairs fellowship program at the University of Minnesota, and took a renewed interest in the DFL politics of my home state."