M&G has appointed Knight Frank to sell The Forum at Solent Business Park in Southampton, seeking offers in excess of £42m – a 7.5% yield.
The 250,000 sq ft cluster of five buildings is partially let to a variety of tenants.
HSBC secured 70,000 sq ft, the entirety of Forum One, in 2014, after lack of supply in the city centre pushed the bank out of town.
SpecSavers has let Forum Six, while other tenants in the complex include serviced office provider Regus, mortgage lender Interbay and recruitment firm Randstad.
The ground and first floor of Forum Four, and all 48,592 sq ft of Forum Five are vacant.
Interest in the portfolio is expected to come from investors seeking secure income from existing covenants, while agents expect interest from occupiers owing to the limited grade-A stock in Southampton city centre.
Levels of grade-A new and refurbished space in the city core are around 60,000 sq ft.
Andrew Hodgkinson of Lambert Smith Hampton said: “The opportunity is interesting as it represents one of the few remaining examples of vacant grade-A space in larger buildings for our location.
“There are some strong covenants and good potential for rental growth, supported by lack of supply and strong occupier demand from large corporates.”