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Ryan E. Dunn

Senior Counsel

rdunn@harrisbeachmurtha.com
D: (203) 772-7737  
- New Haven, CT Office
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Ryan E. Dunn
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Ryan advises businesses and individuals on all aspects of U.S. taxation, focusing on cross-border activities and transactional matters. He also provides domestic tax advice to partnerships, corporations, S corporations and their respective owners on various business transactions, including formations, mergers, acquisitions, internal restructurings and divestitures. Ryan’s experience spans a myriad of sectors, including technology, finance, cannabis, real estate and advertising.

In his international tax practice, Ryan provides U.S. tax advice to both U.S. businesses with foreign operations and foreign businesses with U.S. operations. Ryan helps these businesses navigate tax treaties and complicated structuring decisions driven by U.S. tax considerations. He has extensive experience with foreign tax credits and applying the U.S. anti-deferral regimes including subpart F and GILTI.

Ryan offers comprehensive pre-immigration tax planning for foreign individuals seeking U.S. residency, as well as advising current U.S. residents on the tax implications of relinquishing citizenship or terminating their lawful permanent residency. 

Ryan also has substantial experience with planning for Section 1202 (qualified small business stock) gain exclusions and advising investors and funds on opportunity zone investments.

Ryan has been quoted on international tax issues in The Wall Street Journal, The Washington Post, Tax Notes Today and other media outlets. Prior to joining Harris Beach Murtha, Ryan was a partner at an international law firm.

Insights
September 12, 2025

Mitigating the Impact of Section 280E for Cannabis Businesses

Employee Stock Ownership Plan and utilizing Section 471(c) can help cannabis businesses with taxes.
July 10, 2025

Summary of Key Tax Provisions in the One Big Beautiful Bill

President Trump signed the One Big Beautiful Bill (OBBB) into law on July 4. We are highlighting several key tax provisions in this alert.
May 19, 2025

Tax Highlights from the One, Big, Beautiful Bill

The bill includes a SALT cap increase, new international taxes, and cuts to green tax credits, among other things.
News
October 20, 2025

MJBiz Daily Publishes Cannabis Attorneys’ Article

The article provides perspective about how cannabis businesses can mitigate the impact of Section 280E and lower their effective tax rate.
October 8, 2025

Attorneys’ Article Among JD Supra’s Most Read in September 2025

The advisory detailed ways cannabis businesses can mitigate high effective tax rates caused by Section 280E of the Internal Revenue Code.
April 9, 2024

Murtha Cullina Represents Rawson Materials in Purchase of Sterling Concrete Corp.

Recently, Murtha Cullina completed a transaction for Strategic Commercial Realty, Inc. d/b/a Rawson Materials which includes the purchase of
August 31, 2023

Get to Know New Tax Counsel Ryan E. Dunn

Murtha Cullina recently welcomed Ryan E. Dunn to our Tax practice based in New Haven. Ryan advises on U.S. taxation, with an emphasis on
August 22, 2023

Murtha Cullina Strengthens Tax Practice with Addition of Ryan E. Dunn as Counsel in New Haven Office

Murtha Cullina recently welcomed Ryan E. Dunn to its New Haven office, marking a notable addition to its Tax practice. Ryan advises
Events

Three Harris Beach Murtha Attorneys to Present at TANGO’s Building Bridges Nonprofit Conference

October 15, 2025
Julia Boisvert, Jeremy Speich and Ryan Dunn will speak at TANGO’s annual nonprofit conference.
External Publications
Admissions
ConnecticutKentucky
Education

University of Connecticut Law School

JD 
  • JD, Certificate in Tax Studies
  • Dean’s Scholar Recipient

Sacred Heart University

BS 
summa cum laude

Capabilities

Legal Practices

Member of:

Corporate
International Trade
Tax

Industry Teams

Member of:

Cannabis
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Ryan E. Dunn

Ryan E. Dunn

Senior Counsel

rdunn@harrisbeachmurtha.com
Capabilities
People
Harris Beach Murtha Attorneys at Law
Ryan E. Dunn

Ryan E. Dunn

rdunn@harrisbeachmurtha.com
D: (203) 772-7737
New Haven, CT Office

Profile

Ryan advises businesses and individuals on all aspects of U.S. taxation, focusing on cross-border activities and transactional matters. He also provides domestic tax advice to partnerships, corporations, S corporations and their respective owners on various business transactions, including formations, mergers, acquisitions, internal restructurings and divestitures. Ryan's experience spans a myriad of sectors, including technology, finance, cannabis, real estate and advertising.

In his international tax practice, Ryan provides U.S. tax advice to both U.S. businesses with foreign operations and foreign businesses with U.S. operations. Ryan helps these businesses navigate tax treaties and complicated structuring decisions driven by U.S. tax considerations. He has extensive experience with foreign tax credits and applying the U.S. anti-deferral regimes including subpart F and GILTI.

Ryan offers comprehensive pre-immigration tax planning for foreign individuals seeking U.S. residency, as well as advising current U.S. residents on the tax implications of relinquishing citizenship or terminating their lawful permanent residency. 

Ryan also has substantial experience with planning for Section 1202 (qualified small business stock) gain exclusions and advising investors and funds on opportunity zone investments.

Ryan has been quoted on international tax issues in The Wall Street Journal, The Washington Post, Tax Notes Today and other media outlets. Prior to joining Harris Beach Murtha, Ryan was a partner at an international law firm.

Areas of Expertise

Legal Practices

Member of:

Corporate
International Trade
Tax

Industry Teams

Member of:

Cannabis
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ConnecticutKentucky
Attorney Advertising. Prior results do not guarantee a similar outcome. © 2026 Harris Beach Murtha Cullina PLLC
Content current as of October 13, 2026 3:36 am