German fund manager Deka has made an £85m (€98m) offer for 95 Gresham Street in the City of London, reflecting a net initial yield of 5.5%.
Standard Life instructed Strutt & Parker to sell the 13,935 m2 office building last month.
The offer is part of a major investment spree for Deka, which has picked up several London trophy assets in recent months, including 1 Southampton Row, 5 Aldermanbury Square, and the Palestra building.
Savills and CBRE advise Deka; Strutt & Parker is acting for Standard Life.