PHILADELPHIA-Marburg, Germany-based Aventis Behring has renewed the lease for its US corporate headquarters at the Maschellmac Office Complex in King of Prussia, PA and expands to 143,025 sf. Plymouth Meeting, PA-based Brandywine Realty Trust owns and manages the property.

Terms of the lease are undisclosed. However, brokers familiar with the King of Prussia office market tell the average asking rental rate is approximately $24.50 per sf. The overall vacancy rate in the area, including sublease space, is hovering just above 22%, but absorption is reportedly inching up during the last half of this year, fueled by pharmaceutical and biotechnology companies.

Bill Wilson and David Niles were Brandywine’s in-house leasing representatives under the direction of Tony Nichols Jr., senior vice president of leasing. Jeff Barker of the local office of Cushman & Wakefield represented the tenant.

Aventis Behring, a division of France-based Aventis, is a biotech giant in its own right and a leading global manufacturer and supplier of plasma and recombinant products.

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