Helix Partners has signed a five-year lease at a Madison Avenue office building.The Investment advisory firm is moving its office from 399 Park Ave. to 545 Madison Ave. Helix Partners new 7,000-square-foot space will be on the eighth floor of the office building. Asking rent was $98 per square foot. Asking rents range from $88 to $130 at the building.CBRE’s Greg Maurer-Hollaender represented Helix Partners in the deal. Cushman & Wakefield’s Tara Stacom and her team represented the landlord, Marx Realty.

“Helix Partners was particularly attracted to the well-appointed pre-built suites at 545 Madison as well as the elegant and elevated environment that the property offers to their employees and guests,” Marx Realty’s CEO Craig Deitelzweig.

The 18-story office tower recently unveiled a 7,000-square-foot “Leonard Lounge,” which includes a cafe, a 2000-square-foot landscaped terrace, and a 40-seat boardroom. Notable tenants include financial software and applications developer Strike Technologies, private equity firm Snow Phipps, and Qurate Retail Group.