The Graybar Building at 420 Lexington Ave. has been the site of more than 100,000 square feet of renewals.

Litigation firm Barton, Barton & Plotkin, a tenant for 50 years, will remain on most of the 18th floor until 2020, and New York Life Insurance Company has renewed its 87,944-square-foot lease on part of the 14th and entire 15th floors.