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Ziff Brothers Investments (ZBI) is a prominent American private investment firm, operating as a family office for the Ziff family, heirs to the Ziff Davis publishing fortune. Founded in 1992 by Dirk, Robert, and Daniel Ziff after the sale of their family's publishing company, ZBI is known for its sophisticated and diversified investment approach across a wide range of asset classes globally. These include public equities, fixed income, private equity, real estate, commodities, and hedge funds. The firm is recognized for its rigorous research, analytical depth, and long-term investment horizon, managing the substantial wealth generated by one of America's notable business families. ZBI maintains a reputation for privacy and discretion in its operations.
Serves as the global headquarters, overseeing investment strategy development, portfolio management, risk assessment, research, and core operational functions for the family office.
Located in a prestigious skyscraper in Midtown Manhattan, offering state-of-the-art facilities, high security, and proximity to global financial markets. The office space is designed to be modern and functional.
Characterized by a highly analytical, intellectually rigorous, and discreet environment. Emphasis is placed on deep research, collaborative decision-making, and achieving long-term investment objectives. The culture fosters meritocracy and confidentiality.
The New York headquarters is the nerve center for the Ziff family's extensive global investment portfolio, making critical decisions that shape its financial legacy and growth.
Ziff Brothers Investments operates with a global investment mandate. While its primary offices are in the United States, its investment activities span across international markets and diverse asset classes. The firm supports functions such as global market research, international portfolio management, and direct investments in various regions worldwide, adapting its strategies to different economic environments and opportunities.
Park Avenue Tower, 65 East 55th Street
New York
NY
USA
Address: 55 Railroad Ave, Greenwich, CT 06830, USA (Widely reported)
Provides strategic access to the robust financial ecosystem in the Connecticut and New York suburban area, potentially offering geographical diversification for operations and convenience for principals or key personnel residing in the vicinity.
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As of April 2025, Ziff Brothers Investments' leadership includes:
Ziff Brothers Investments has been backed by several prominent investors over the years, including:
Ziff Brothers Investments is a private family office and maintains a high degree of confidentiality regarding its internal operations, including executive team changes. Publicly available information on executive hires or exits is typically very limited.
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While specific email formats for Ziff Brothers Investments are not publicly confirmed due to the private nature of the firm, companies of similar structure often use common patterns. A likely format could involve the first initial followed by the last name, or first name separated by a period from the last name.
[first_initial][last]@ziffbrothers.com or [first].[last]@ziffbrothers.com (hypothetical)
Format
jdoe@ziffbrothers.com
Example
70%
Success rate
Institutional Investor • October 26, 2023
A discussion on family offices evolving highlighted how firms like Ziff Brothers, known for their sophisticated investment strategies, navigate changes in the investment landscape. While not specific news about ZBI, it contextualizes their position among elite family offices....more
Bloomberg • March 1, 2023
Bloomberg article discussing major private art collections, mentioning the Ziff family's significant collection alongside other prominent collectors. This reflects the family's broader interests and wealth management....more
Reuters • August 14, 2015
Historical news indicating Ziff Brothers Investments planned to close its London office that managed external hedge fund capital, to focus solely on managing the Ziff family's assets. This marked a strategic shift for the firm....more
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