Tritower Financial Group has sold 3200 Walnut, a four-building office/R&D complex totaling 151,384 square feet in Boulder, Colo. According to public records, the campus traded for $99 million. Invesco Real Estate acquired the property, which is occupied by Pfizer. The asset previously changed hands in August 2018, when BioMed Realty sold it for $52.3 million, according to CommercialEdge data.

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