Newmark arranges 47,500 s/f lease for Fourth Power at 44 Middlesex

Bedford, MA Newmark has arranged a new 47,500 s/f lease for energy sustainability and grid resilience company Fourth Power at 44 Middlesex, a newly delivered, 147,000 s/f, advanced manufacturing campus located at 44 Middlesex Tpke. The transaction underscores continued tenant demand for purpose-built, advanced manufacturing and cGMP-capable facilities within Greater Boston’s established innovation and technology ecosystem.

Executive managing directors Torin Taylor, Rich Ruggiero, Matt Adams and Tyler McGrail and senior managing director Rory Walsh represented landlords Camber Development and Wheelock Street Capital. Rob Glor and Michael Goodwin of Rise73 represented the tenant.

“Fourth Power is exactly the type of innovative, advanced manufacturing user 44 Middlesex was built to attract,” said Taylor. “With robust power capacity, flexible floorplates and proximity to Greater Boston’s talent base, the campus is well-suited for companies operating at the intersection of energy technology, manufacturing and life sciences.”

Fourth Power anticipates moving into the new space in summer 2026. The technology Fourth Power is commercializing – a long duration thermal energy storage system – spun out of MIT, where its founder is a professor, and is backed by Munich Re Ventures, DCVC, and Bill Gates’ Breakthrough Energy Ventures.

44 Middlesex features a 147,000 s/f innovative industrial building with heavy infrastructure designed specifically for advanced manufacturing, biomanufacturing and R&D uses, with an adjacent site where a similar building can be constructed as a build-to-suit for 147,000 s/f. Core and shell construction on Building 1 is complete, offering immediate availability of 100,000 s/f for occupiers seeking scale, power and infrastructure in a supply-constrained market.

Located directly off Middlesex Tpke. with access to Rte. 3 and I-95, 44 Middlesex sits at the center of one of Greater Boston’s most active life science manufacturing and R&D clusters. The property is within minutes of Burlington, Lexington and Hanscom Airfield, and 20 miles from downtown Boston. 

The surrounding Crosby/Middlesex corridor has experienced significant recent life science leasing momentum, with more than 1 million s/f of major life science leases signed nearby. The town has been designated a Platinum BioReady community by MassBio, reinforcing the area’s long-term commitment to life science development.