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Individuals profile
High Net Worth 2025
Individuals profile | High Net Worth 2025: Private Wealth Law, Private Wealth Law: Eastern Region
Basil P Zirinis
Ranked in 3 Practice Areas

Star Individuals

Private Wealth Law

London (Firms)

10 Years Ranked

1

Band 1

Private Wealth Law

New York

4 Years Ranked

1

Band 1

Private Wealth Law: Eastern Region

USA - Nationwide

3 Years Ranked

Chambers Review

Provided by Chambers

Chambers High Net Worth

Private Wealth Law - London (Firms)

Star Individuals
Individual Editorial

Basil Zirinis of Sullivan & Cromwell is highly regarded for his work in international private wealth. He advises ultra high net worth clients on trusts, estate planning and wealth structuring.

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Private Wealth Law: Eastern Region - USA - Nationwide

1
Band 1
Individual Editorial
Basil Zirinis advises on complex cross-border wealth planning matters. Zirinis has a significant reputation as a leading international succession planning expert.
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Private Wealth Law - New York

1
Band 1
Individual Editorial

Basil Zirinis earns praise across the market for his in-depth experience advising high net worth clients on private wealth matters. He often advises individuals, fiduciaries and family-controlled businesses throughout the world on domestic and international estate and trust planning, as well as estate and trust administration and litigation.

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Contributions

Latest contributions provided by Basil P Zirinis

Global Practice Guide
Private Wealth 2025
Introduction
Basil Zirinis
Elizabeth Kubanik
Authored by
Basil Zirinis, Elizabeth Kubanik
Article • Jul 2025

Strengths

Provided by Chambers

Basil is a consummate professional. I respect his knowledge, expertise and delivery. He is also kind and generous, which is important.

Private Wealth Law respondent
Chambers High Net Worth

Basil Zirinis is a fountain of knowledge and is very responsive.

Private Wealth Law respondent
Chambers High Net Worth

Basil is a truly amazing lawyer, he can advice on everything and anything to do with private clients.

Private Wealth Law respondent
Chambers High Net Worth

Basil is a senior lawyer, who is very experienced and has worked with a lot of extremely wealthy families, so knows how they think and that is helpful to us.

Private Wealth Law respondent
Chambers High Net Worth

Basil is extremely effective in his work; he has great knowledge and the ability to communicate complex issues with ease. He is just a masterclass in how to manage clients.

Private Wealth Law respondent
Chambers High Net Worth

Basil Zirinis has a great background in cross-border work. He is one of the best for that kind of work.

Private Wealth Law: Eastern Region respondent
Chambers High Net Worth

Basil is extremely good at identifying strengths and weaknesses in large international trust structures.

Private Wealth Law: Eastern Region respondent
Chambers High Net Worth

Basil is extremely good at identifying strengths and weaknesses in large international trust structures.

Private Wealth Law respondent
Chambers High Net Worth

Basil Zirinis has a great background in cross-border work. He is one of the best for that kind of work.

Private Wealth Law respondent
Chambers High Net Worth

Basil Zirinis is very good.

Private Wealth Law respondent
Chambers High Net Worth

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Sullivan & Cromwell LLP

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