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Fast-growing AI firm trades up for spacious San Francisco offices

LangChain takes over former Sony space at Kilroy-owned building
The view from a downtown freeway off-ramp of 303 Second St., an office building in San Francisco’s SoMa District. Its newest tenant is set to be AI darling LangChain. (CoStar)
The view from a downtown freeway off-ramp of 303 Second St., an office building in San Francisco’s SoMa District. Its newest tenant is set to be AI darling LangChain. (CoStar)
CoStar News
June 16, 2026 | 10:17 P.M.

An artificial intelligence startup that scored $125 million in funding late last year has graduated from a starter office in downtown San Francisco to much more spacious digs a few blocks away.

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