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About Grassi & Co.

Founded in 1980 by Lou Grassi, Grassi & Co. is now one of the 100 largest tax, accounting, and business advisory firms in the U.S., as measured by annual revenues. The firm has also been ranked among the 20 largest accounting firms in New York and among the five largest on Long Island. Based in Jericho, N.Y., the firm has New York offices on Long Island, in Manhattan, and in Westchester County. It also one two offices in Italy, one in Milan, and one in Rome. Grassi & Co. is an independent member firm of Moore Stephens North America, the North American arm of Moore Stephens International Limited, an international association with over 300 independent accounting and consulting firms with approximately 650 offices in over 100 countries.

Grassi & Co.

50 Jericho Quadrangle
Suite 200
Jericho, NY 11753
Phone: (516) 256-3500

Firm Stats

Employer Type: Private
CEO/Managing Partner: Louis C. Grassi
2019 Employees (All Locations): 200