Jane Street plans to double its London office space.

According to the Financial Times, Jane Street is planning to sign a pre-let agreement for a 465,000-square-foot office space at One Spitalfields, committing to a lease before the building is completed. The property is currently occupied by law firm A&O Shearman, which plans to move out in 2027. Jane Street will move in after 2029, once JPMorgan Asset Management completes the building's conversion work. A person familiar with the matter said Jane Street is not expected to actually use the new office space until four years from now. Michael Ramm, head of real estate for Europe at JPMorgan Asset Management, said Jane Street's move represents "the largest off-plan pre-let transaction in the City in more than a decade."