JERSEY CITY- Frenkel & Co. Inc. has signed a new 11-year lease for 23,516 square feet at Mack-Cali Realty Corp.’s Harborside Financial Center Plaza 3 on the waterfront here. Robert M. Romano of Jones Lang LaSalle, and Richard Mirliss and Daniel B. Harrison, both of Newmark Knight Frank, represented the tenant.

Frenkel & Co. began its term in Jersey City as a subtenant at Mack-Cali’s 101 Hudson St. in 2003 and signed a direct lease in 2009. Relocating its operations to Harborside Financial Center, Frenkel will now be located in a mixed-use complex with five class A office buildings totaling 3.1 million square feet. The complex is 98% leased.

Mitchell E. Hersh, president and CEO of Mack-Cali, tells GlobeSt.com, “The relationship we’ve built with Frenkel over the past several years is a demonstration of our success at tenant retention, and our ability to fulfill our tenants’ changing space requirements within our inventory of office space.”