Anthropic, OpenAI Splurge on London Offices in Leasing Wave

Artificial intelligence-linked companies, including Anthropic PBC and OpenAI, have been rushing into London for office space in a surge that’s surprised local landlords.

Such tech firms have leased more than 1 million square feet (92,903 square meters) — roughly the size of 18 American football fields — since the start of 2025, according to data from real estate broker Knight Frank, which uses a broad definition for AI companies. That is equivalent to about 7% of all the lettings during that period.