Jonathan Mayblum

Key Executives


Jonathan Mayblum

Co-founder of Arcturus.


Mr. Mayblum’s expertise includes managing a team of senior real estate professionals applying a hands-on approach to analyzing and resolving clients’ issues. Working with companies burdened by underperforming assets and portfolios, Mr. Mayblum collaborates with management to maximize asset performance and value. He applies his business and legal background to provide strategic advice to all stakeholders, including debtors and creditors, in complex and distressed situations. He has substantial expertise in management, operations, negotiations and structuring complex real estate projects.


Prior to forming Arcturus, Mr. Mayblum spent 18 years with the Ruben Companies (formerly Lawrence Ruben Co.) the last 10 years of which he served as President. As President, Mr. Mayblum oversaw more than 7 million square feet of prime commercial and residential properties in New York, Washington, D.C. and Boston. Mr. Mayblum was responsible for the day-to-day operations of the business which included managing a team of over 50 professionals including leasing, construction, operations and financial professionals. He structured numerous joint ventures and investments with leading institutions, including Goldman Sachs, Cerberus Capital Management, Soros Fund Management, Vornado Realty Trust and Related Companies.


While at Ruben Companies, Mr. Mayblum held several additional leadership roles including acting as senior advisor to Oaktree Capital’s Real Estate opportunity funds. The real estate funds had approximately $1 billion of equity invested in 80+ transactions in the United States, Europe and Asia. Under Mr. Mayblum’s leadership a strategic portfolio plan was executed and a portion of the assets valued at approximately $1 billion were successfully sold.


Additionally, Mr. Mayblum served as Chairman of Granite Partners, LLC, a leading real estate investment sales company based in New York City. In 2005-2006, under Mr. Mayblum’s guidance, the company executed over $5 billion in sales and $2.5 billion in financing transactions. Mr. Mayblum served in this capacity from its inception through August 2007, when he orchestrated the sale of Granite to London based Savills plc.


Mr. Mayblum, an innovative leader, co-founded Workspeed Holdings, LLC, the leading provider of web-based workflow solutions for commercial real estate. The company’s applications are in use in over 200 million square feet of commercial real estate throughout the United States; customers include CB Richard Ellis, SL Green, Maguire Properties and Macklowe Properties.


Mr. Mayblum graduated summa cum laude, from Goizueta Business School – Emory University and Cornell Law School.

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