The scheme has listed Matumbato Primix Enterprises Limited, which houses Mr Sonko's private offices, as owing it Sh453,860,000.
Another debtor being pursued by trustees of the Kenya Railways Staff Retirement Benefits Scheme is Muthurwa Development which built the Muthurwa Market in Nairobi.
This property was acquired when President Uhuru Kenyatta was Finance minister.
The Retirement Benefits Authority (RBA) has ordered trustees of the Kenya Railways Pension Scheme to explain, within 14 days, measures it has taken to recover Sh453.9 million owed to it by a company associated with Nairobi Governor Mike Sonko.
The scheme has listed Matumbato Primix Enterprises Limited, which houses Mr Sonko's private offices, as owing it Sh453,860,000.
