The biotech-focused industrial park, which also counts GSK, Healthineers and CSL Behring as tenants, has been offered for sale by its owner Infrareal, they said.

Insurer Swiss Life and infrastructure investor Ancala are expected to submit binding bids in coming days, the people added.

Infrareal and Ancala were not immediately available for comment, while Swiss Life declined to comment.

Pharma-Park Marburg has annual earnings before interest, tax, depreciation and amortisation of about 25 million euros and could be valued at 400-450 million euros, the people said.

The industrial park covers an area of 67.4 hectares, and approximately 6,000 employees work there.

($1 = 0.8481 euros)

(Reporting by Arno Schuetze; Editing by Kirsten Donovan)