One Canada Square midnight Sunday, One Canada Square left more lights on than any other building in London. However, Canary Wharf Group said that some tenants have staff working around the clock, and 100% of the energy comes from renewable resources. One Canada Square regularly holds charity abseiling events during weekends. Various charities are given permission to use the building for their abseil challenges to raise money. Participants abseil down from the pyramid roof to street level. Abseilers normally use only 2 ropes and have to put up with windy conditions at 800 feet, whilst enjoying the views of London as they abseil
Asia Square wealth fund, has agreed to purchase the building for S$3.4 billion. Citi is the anchor tenant for Asia Square Tower 1, giving Citi the right to external signage on the building. Tower 1 houses Citi Asia Pacific, Citi Singapore headquarters and Citi Private Bank. Other Tower 1 tenants include the global investment bank New State Corporation, the Taipei-based Global Financial Services Group CTBC Bank at #33-02, China Citic Bank International, Julius Baer, China Fortune Land Development's international HQ, the Swiss National Bank, Bank Sarasin, Lloyd's of London, Marsh & McLennan, White & Case, Booz Allen Hamilton, Royal Bank of Canada,