• Registered Investment Advisers
    Walnut Investment Services
    Because it's Your Money.
    Your Investments. Your Life.
  • Because it's Your Money. Your Investments. Your Life.
    Independent, Unbiased
    Financial & Investment Advise
  • For Individuals, Families and Small Businesses
    Providing the highest level of personal financial & investment advice

With tax season in full swing, it's time to review your investments and retirement plans

All about us!

About Walnut Investments

Who we are

Walnut Investment Services LLC. is an independent, registered investment adviser. Established in 2000 and based in Park Slope, Brooklyn, we specialize in providing the highest level of personal financial & investment advice to individuals, families and small businesses. Our team offers over 50 years years of combined experience, matched with the focused attention and personal service of an independent, locally-owned company. Providing solutions for the financial success of each and everyone of our clients is of paramount importance to us. Walnut Investment Services LLC was founded on the premise that the best financial advice should be independent, unbiased and customized for each client's needs.

For more information about us, please see our firm's CRS form by clicking here.

Mark Blinderman (Investment Advisor Representative, Managing Partner)

Mark was born in 1963. Graduate of Bernard M. Baruch College, he holds a Bachelor’s degree in International Economics. He is a Registered Investment Adviser and a Notary Public.

Harvey Kraus (Investment Advisor Representative, Managing Partner)

Harvey was born in 1951, graduated from Brooklyn College in 1975 with a Bachelor’s degree in accounting and for the past 35 years has been running his own accounting practice. He is a Registered Investment Adviser and an Enrolled Agent with the IRS.

Let us help you

Our Services


Walnut Team

Mark Blinderman

Managing Partner
Investment Advisor Representative, Notary Public

Mark Blinderman

Financial Planning & Investment Management

Harvey Kraus

Managing Partner
Accountant, Investment Advisor Representative, Enrolled Agent

Harvey Kraus

Taxation & Investment Management

News, tips & more!

In the Press

Walnut Investments - New York 5-star Wealth Managers
  • January, 2016

New York Magazine

Walnut Investment Services, LLC made the list of New York's Five Star Wealth Managers - highest in service and overall satisfaction.

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Mark Blinderman in The Wall Street Journal
  • Feb 22, 2016

In the news: this week’s top money stories

"An increase in regulation over the past 10 years, especially after the Dodd-Frank bill passed in 2008, has made it increasingly difficult to keep our business small."...

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"This Site may provide links to other websites that we believe might be of interest and convenience to you. Please note that when you click on a Linked Site, you will be transferred to another provider’s website and will be leaving Walnut Investment Services, LLC. We do not control these Linked Sites and their providers, and we are not responsible for the contents or the operation of any of these Linked Sites.

The inclusion of any Linked Site does not imply endorsement of the Linked Site by Walnut Investment Services, LLC. We encourage you to read the terms of use and privacy statements of these Linked Sites as their policies may differ from Walnut Investment Services, LLC.

Mark Blinderman Rings Opening Bell on Wall Street
  • Jul 31, 2018

Memorable day for Walnut Investment Services

Mark Blinderman was invited to participate in the ringing of the opening bell at the New York Stock Exchange on July 31, 2018.

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