About Us

The 601w Companies is located at the Starrett Lehigh Building, shown here.

The local properties of 601w are centrally managed from its main offices in New York City, located at the Starrett Lehigh Building. Out-of-town properties are managed by national real estate firms which handle the day-to-day operations of the properties, under the supervision of the principals of 601w, and communicate with asset managers of 601w on a daily basis. 601w issues complete reports on a quarterly basis. All major management, leasing, financing and sale decisions are made by the principals of 601w.

Managing Members

Mark Karasick

Has been a principal in RE management and development for more than two decades. At 601w, Mark has assembled and leads a team of highly experienced professionals to conduct the acquisition, development, leading and management of the properties that comprise 601w. Mark is a graduate of Yeshiva University and the Revel graduate program with a masters in history. Mark directs all major aspects affecting the properties and has overseen the extraordinary growth and success of 601w from its inception.

Victor Gerstein

A graduate of New York University and Yale Law School. Mr. Gerstein has been practicing real-estate law for over 33 years in Manhattan and has worked together with Mark Karasick since 1995. He is a founding member and partner of Gerstein Strauss & Rinaldi, a New York City law firm specializing in real estate law. Mr. Gerstein has acted as both sole managing member and as a co-managing member with Mr. Karasick in a significant number of the transactions set forth on the annexed schedules.