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In its latest major suburban acquisition, life science developer Alexandria Real Estate Equities paid $124.7 million for a Woburn office complex leased to Raytheon Corp.

The 225 and 235 Presidential Way office buildings span 440,000 square feet. The seller, Piedmont Office Realty Trust, announced in 2017 that Raytheon had renewed its lease through 2024. Atlanta-based Piedmont bought the properties, which were completed in 2000, for $85.3 million in September 2011.

In a press release announcing its fourth-quarter earnings, the nation’s largest life science landlord listed the Presidential Way properties among its recent acquisitions that have development or redevelopment opportunities.

Alexandria has been scouting the ranks of Greater Boston office parks suitable for lab conversions and biomanufacturing facilities.

In January, the firm completed the acquisition of eight buildings totaling 1.3 million square feet at Andover’s Minuteman Park for $341 million.

The acquisition is the second in five months of a Raytheon-occupied property in Greater Boston by a life science developer.

In September, Healthpeak Properties paid $180 million for the 229,000-square-foot Cambridge Highlands campus that is the headquarters of Raytheon BBN Technologies. Raytheon BBN’s lease runs through June 2027.

And in Waltham, a former Raytheon R&D facility is being converted into life science space by an affiliate of TPG Group.

Raytheon did not immediately respond to a request for comment.