What changed

Dropbox left 1800 Owens St

The DataSF 1800 Owens row has no end date as of 2026-10-07; valid_to is the start of the 50 Hawthorne registration. Source

Anthropic: lease at 300 Howard St

Full-building, 13-year lease announced January 2026 (DivcoWest gives 466,000 sq ft and 25 storeys, SFist 27 storeys, plus 342 Howard); move-in date not stated in sources. Source

OpenAI left 3180 18th St

DataSF registry rows for 3180 18th St end 2024-12-31; xAI registered there from 2025-01-01. Source

X (formerly Twitter) left 1355 Market St

Registered 2012-06-11; DataSF location_end_date 2024-09-13. Source