1930’s – Henri and Sidney Benjamin and David Small create a firm.
1962-1963 – Murray Lipman and Morton Ptack create their own firm.
1973 – Benjamin and Small’s firm merges with Lipman and Ptack.
1985 – Lipman and Ptack split, giving rise to the foundation of Ptack Schnarch Basevitz.
2000 – The firm adopts the name “PSB.”
2008 – PSB merges with Boisjoli Sabbag