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A multi-family office dedicated to making your dreams a reality

New York based, globally oriented

SINCE 2009


One & Only Holdings has been providing a select group of clients and
their families with unparalleled service since 2009.

Through our international strategic alliances, we have helped more
than 100 high-net-worth families prosper by building, managing and preserving their wealth.


We are an international business with offices and associates around the world. Help is never more than a phone call or flight away, no matter where your home office is located. We provide expert advice with an international perspective and have a global network of contacts and investment opportunities.

We have expanded across borders to better serve our international clients and our expertise has grown accordingly. Whether you require complex answers, investment advice, or tax/legal guidance, we can assist you with our knowledge of international issues at any hour of the day.

We leverage our knowledge, experience and operational capabilities to support the requirements of the family across its entire range of affairs, from long-term planning to routine transactions and administrative support.

We advise wealthy international families on long-term tax planning and structuring solutions, and ensure that day-to-day transactions are properly scrutinized for their tax and regulatory implications.

We offer integrated planning and investment advice focused on the needs of resident and domiciled/deemed-domiciled family members. Our clients benefit from advice across a full range of tax-efficient structures and investments that support their financial and intergenerational interests.

Drawing on our resources and expertise, we invest on a discretionary or advisory basis across the full range of asset classes. We adapt our investment approach to meet specific family and market circumstances.

We advise families on their approach to philanthropy, usually as an integral part of the wider family strategy. We also provide technical advice, structures, investment services and full operational support where required.

Our network of contacts and partners gives us access to attractive private equity and venture capital opportunities, both through funds and direct investments. Our offering is global and flexible, and can be fully tailored to each client’s specific requirements.

We advise and act on behalf of our clients in all matters related to residential and commercial properties, particularly in the United States. We support clients with acquisitions and dispositions, manage existing properties, and offer private property search services.



Gennady is a licensed real estate broker, international investment consultant, and the co-founder and President of One & Only Realty, a real estate brokerage firm headquartered in New York City. Over the past 25 years, he’s built a reputation as someone who goes above and beyond for both local and international clients to deliver a service and experience like no other.

Beyond the expertise he brings in high-end luxury residential properties, Gennady is also well versed in commercial real estate and property management services. He has been involved in numerous high-profile real estate transactions all around the globe and his deep understanding of foreign clients makes him the perfect fit for international clientele. Gennady’s great attention to detail, together with his ability to understand and anticipate needs, ensures that each of his clients receives only the very best that New York City has to offer.



Ms. Aiya Tulemaganbetova is an internationally acclaimed strategic business advisor, owner and Chief Executive Officer (CEO) of ALFA CONSULTING GROUP INC. – a premier U.S. based independent family office that has overseen more than $100 million dollars in U.S. transactions for families, multinational corporations and endowments.

Victor K.


Victor K. Dekanidze is an accomplished serial entrepreneur and investor with multiple successful ventures. At the age of 26, Victor had already built a successful hedge fund with $60M in AUM and an impressive 30% return in its first year. He has participated in a number of substantial real estate exits and has helped his clients raise significant funds for their respective projects.

Victor has built a strong network of ultra high-net-worth clients in the FSU region. His clients appreciate his ability to deliver results in a professional and discreet manner. Victor is also actively involved in New York’s Jewish community, has served as a board member of COJECO, and is currently a member of the Wexner Heritage Foundation.

Contact Us

One & Only Holdings
18 East 48th Street, 7th FL
New York, NY 10017
(212) 505-0200

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