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AI software company steps up to fill slice of former Twitter headquarters

Elon Musk's X lands first sublease more than a year after offloading San Francisco hub
X Corp., formerly Twitter, closed its longtime headquarters at 1355 Market St. in San Francisco's Mid-Market neighborhood in 2024. (Getty Images)
X Corp., formerly Twitter, closed its longtime headquarters at 1355 Market St. in San Francisco's Mid-Market neighborhood in 2024. (Getty Images)
CoStar News
September 22, 2025 | 7:52 P.M.

A company has stepped up to fill some of X Corp.'s former San Francisco headquarters space more than a year after the social media platform decamped for Texas.

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News | AI software company steps up to fill slice of former Twitter headquarters