As part of the deal, Forest Labs will give back 22,785 sf at the nearby Harborside Financial Center Center Plaza 3, which would have expired in approximately 18 months. The company's most recent deal at Harborside 5 came in 2005 when it boosted its then-presence to 180,000 sf with a 36,452-sf lease for 12 years. The research division's presence at Harborside dates to early 2002 when in two separate leases it took a total of 143,000 sf in a headquarters move across the river from Manhattan. The multiple leases at Plaza 5 are now all set to run concurrently.

"We're delighted that Forest Research Institute has expanded its presence while consolidating at this waterfront office tower," says Mitchell Hersh, president and CEO of the Edison, NJ-based Mack-Cali, in a statement. "Harborside Financial Center continues to attract and retain leading businesses from a diversity of industries."

The latest signing was orchestrated for Forest Research Institute by Arthur Rosenbloom of Newmark Knight Frank, while Mack-Cali was represented in-house by senior director of leasing Thomas Savoca. Further details were not released; availabilities at Harborside Financial Center generally command $35 per sf for direct space and $30 per sf for sublet space.