Nearly 40 sanctioned individuals and entities hold British property through offshore vehicles.
Analysis of the new official ownership register shows three Russian tycoons among those listed as beneficial owners.
Ministers set a deadline of Tuesday night for owners of 32,440 registered overseas organisations to declare their beneficial ownership status or face fines. Fewer than 20,000 have complied so far.
The register has also unearthed prime real estate owned by property tycoon and Conservative donor Nick Candy.
Candy owns a £160m Knightsbridge flat via a Guernsey-based vehicle called PHB London, as well as four other properties held via offshore vehicles.
David and Simon Reuben are listed as the beneficiaries of 106 companies that own property in the UK, mostly incorporated in the British Virgin Isles, the analysis showed.
