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The Hartz Group, Inc.
Ownership
Owner Occupied and Managed
667 Madison Ave is owned, occupied, and managed by its original developer Leonard Stern, who keeps his office in the building and manages The Hartz Group, a large real estate, renewable energy, and investment company, along with his son Edward.
The Hartz Group is nearly 100 years old. Still closely held, the Sterns run the company with a focus on flexibility, adaptability, and an exceptionally strong balance sheet.

Contact

Samia Bali
212.308.3336
samia.bali@hartzmountain.com
Glenn Frankel
Vice-President
201.272.5307
glenn.frankel@hartzmountain.com
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