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The Main Media Inc. 2026

✦ Built By Field Office
    1. Articles
    2. History Lesson

    Operation Fish: When Montreal hid Britain's fortune during WWII

    Billions in gold and securities sat three storeys beneath Sun Life while 5,000 employees worked overhead, completely oblivious.

    By J.P. KarwackiJanuary 9, 2026 - Read time: 5 min
    Operation Fish: When Montreal hid Britain's fortune during WWIIBritain secretly shipped its entire fortune to a vault beneath Montreal's Sun Life Building during WWII to keep it out of Nazi hands. | Photograph: Library and Archives Canada / LAC e010956367-v8

    Places featured in this article

    Sun Life Building

    In the early hours of July 2nd, 1940, trucks rolled through empty Montreal streets toward the Sun Life Building. The RCMP had shut down traffic around Dominion Square. While the crates were marked 'fish', they contained Britain's entire fortune, and if the Nazis had known, the war might have ended right there.

    Operation Fish remains one of the most audacious financial gambits in history: the secret transfer of Britain's gold reserves and securities to Canada during the Second World War. The story involves storm-battered warships crossing U-boat-infested waters and a hastily constructed vault three storeys beneath Montreal's Sun Life Building that would guard more negotiable securities than almost anywhere on earth. Somehow, despite more than 600 people being involved, the Axis powers never found out.

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