"We are pleased to welcome Arch," says Mitchell Hersh, presidentand CEO of the Edison, NJ-based Mack-Cali, in a statement."Harborside continues to be an attractive office location forleading businesses due to its amenities, transportation access andsignificant financial benefits."

Arch was represented by Mark Ravesloot, Paul Jacobs, ColinReilly, Scott Sloves, David Opper and Michael Monahan of CB RichardEllis, while Mack-Cali was represented in-house. The lease runs for15 years, but further terms were not released. The space had beenlisted with an asking rate as "negotiable," and comparable space inthe market generally commands $35 to $40 per sf.

For Arch, the signing completes a multi-phase deal orchestratedby CBRE, which represents the specialty insurer nationally. "In acost-savings move, Arch has consolidated its space, keeping itsheadquarters in Manhattan and moving its operations groups toJersey City," a CBRE spokesman tells GlobeSt.com.