James Sellon

Co-Founder, Managing Partner, Senior Wealth Manager,  MASECO Private Wealth
Location: London, England,
Expertise: Family Wealth Advisory,

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Latest Article

Adrian Edwards promoted to partner at MASECO Private Wealth

MASECO Private Wealth is delighted to announce the promotion of Adrian Edwards to Partner.

Read more

Latest Review

Private Client review:
We recently switched firms to work with James, and we couldn't be happier. He and his team are extremely detail-oriented.
Drew Hess - N/A
27 Aug 2025

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Reviews

Private Client review:
We recently switched firms to work with James, and we couldn't be happier. He and his team are extremely detail-oriented.
Drew Hess - N/A
27 Aug 2025
Private Client review:
James and his team are a pleasure to work with. Always there when we need them.
Emily Quesada - N/A
25 Aug 2025
Private Client review:
We found James and Maseco when they were just starting out and they have consistently given us sound financial information for us to maximise our US/UK scenario. Having someone who totally understands the financial implications has saved us good money over the years. We just moved long term family funds to Maseco, because James works hard to our benefit, and we feel the funds will do better for us in their hands. We always feel like James is solely focussed on our portfolio, which cannot be true - but the personal level of care is everything.
22 Aug 2025
Private Client review:
I have worked with James since Maseco's early days, and he and the firm now manage my entire portfolio. As a family with UK/US assets and investments, we appreciate James has the ability to look after our interests from an appropriate perspective while maintaining a personal touch. His breadth of understanding of financial markets and client-based investment planning have provided the proverbial peace of mind for our situation. His team also works with our tax accountants seemlessly, providing solutions to potentially complex issues with logic and efficiency.
Geoffrey R. vH. Chapman - Private Investor
22 Aug 2025
Private Client review:
I have benefited hugely from James's advice over the years and appreciate the broad perspective and sensible approach to risk-taking that he brings to asset management. His humour and calmness make him a pleasure to work with.
21 Aug 2025
Peer review:
I have worked with James for many years. He has an eye for the detail that others would often miss and is an incredibly proactive advisor. I have no hesitation in introducing clients to James and his team
adam rose - Blickrothenberg
10 Oct 2022
Private Client review:
James and his team have provided my wife and me with excellent service. This is reflected in a number of ways:

- Their listening skills are among the best I have seen from service providers. They worked with us through a number of sessions to understand our goals, risk-tolerances, preferences, and the like, before even coming close to making a recommendation on an investment strategy,

- Their analytic work brought joy to the soul of this finance anorak! Emma James, from James's team, did [and continues to do] a marvellous job of exchanging ideas across spreadsheets and related analytics, such that we make fully-informed decisions, which allow for client offline analyses, and then the sharing thereof with the team. I feel that I have found a kindred partner in finance with them!

- More generally, their thoroughness is laudable. Meetings are well-structured; minutes are carefully composed and provided; and follow-up is excellent. Periodic reporting is also of a very high level, including information that works very well with our tax accountants - an essential for us as dual nationals.

- Both James and Emma have a very pleasant and effective communication style. Both are clearly knowledgeable to a very high degree, yet can explain their thinking with model clarity, and at a level that makes us very comfortable.

In sum, James and Emma do a splendid job from inception, to investment, and onward to regular discussion and review - they are a great team, and we enjoy working with them very much.
Rick Martin - Private Investor
11 Mar 2022
Peer review:
Citywealth recommended
James Sellon - MASECO Private Wealth
06 Dec 2021
Peer review:
James is a skilful communicator with a broad knowledge of the industry. He is a wonderful sounding board for both peers and clients. James always puts his clients first and operates with the highest integrity.
Michael Parsons - Wren Investment Office
29 Apr 2021
Peer review:
James is an outstanding financial planner and wealth adviser. We refer many clients to him and have been delighted with the feedback received.
Alan Smith - www.capital.co.uk
22 Apr 2021
Peer review:
A committed leader in the private wealth space, particularly in respect of U.K./US clients
Alex Jones - Frank Hirth
21 Apr 2021
Peer review:
I have known James professionally for over 15 years. He has consistently maintained his focus on providing the best possible outcomes for his clients and acting with kindness and integrity in his dealings with colleagues and his employees. The success of Maseco is a direct reflection of the values he and Josh embody and have instilled in their business.
Suzanne M Reisman - Law Offices of Suzanne M Reisman
21 Apr 2021
Peer review:
James brings together two very difficult skills; the ability to manage complex financial situations, and the ability to communicate in effective and meaningful ways, always holding investor outcomes as the central goal.
Steven Greenfield - DFA
20 Apr 2021
Peer review:
James and his team have always provided excellent advice and asset management to my clients over the years. They take the time to get to know their clients and understand what is important to them to ensure they offer the best investment strategy.
Suzanne Willis - Block Rothenberg
20 Apr 2021
Peer review:
James leads in his niche in the market. Excellent client service and very good communication skills.
Ross Elder - Lincoln Private Investment Office
20 Apr 2021
Private Client review:
Very knowledgable, a good listener, and excellent people skills.
Edward Ocampo - Quantile Technologies
18 May 2020
Private Client review:
James is professional, very personable, pro-active, patient and actually listens to the details of your experiences and goals. The Maseco team take their behavioural cue from James, their leader, so that the whole company is aligned in its values and willingness to assist. The financial advice from Maseco has been excellent.
Jayne Chace - Chace Consulting
13 May 2020
Private Client review:
A very long term relationship with positive impact. James and Maseco have provided reassuring management of my savings and investments as well as peace if mind which is very important.
Sam Theodore - Scope Insights
13 May 2020
Private Client review:
James Sellon has served us with excellence since 2002, and we could not be happier with his and his team's quality of service.
Rod MacAlistet - MGA
13 May 2020
Private Client review:
James gives a great deal of time and personal attention to his clients and has a very carefully thought through and responsible approach to investing and wealth management. He offers an excellent combination of technical and interpersonal skills.
Robin Hardie - n/a
13 May 2020
Peer review:
James is best of breed. Personable, effective and tax literate, it has been a pleasure to work on a large number of clients together over many years.
Daniel Hyde - Mr
01 Aug 2019
Private Client review:
James has an superb manner in combining great advice along with an engaging personality. He encourages the people around him to enjoy the experience and at the same time deliver terrific customer service. Whether it is his colleagues or other clients, James creates a team spirit and a sense of fun and adventure. I have recommended him
to numerous individuals who would all agree. On top of it all, he runs a very successful business which clearly reflects his skills as a leader.
Liz ellerton - N/a
23 Jul 2019
Peer review:
I have known James Sellon for many years, and have worked most closely over the past three years, both on common clients and my personal investments. As a tax practitioner serving individuals with US and UK tax considerations, it is a challenge finding investment professionals with the skills and platform to service my clients. I never hesitate to recommend James to my clients, as I know that he has both.

Moreover, I trust James to provide a very personal service to my clients. He takes the time to get to know them and their objectives in great detail, applying technology and his broad knowledge, and arrives at a financial plan that considers all of their needs and not just an asset allocation.

James also has a strong grounding in US and UK planning and compliance, so he asks the right questions and serves as a capable sounding board for the tax advisor. His platform makes filing the US and UK tax returns much easier, and he ensures that his clients stay in compliance with both jurisdictions.

Most importantly, James is an empathetic person who puts his clients' interests first and operates with the highest integrity.
April Furnell - Citywealth
07 May 2019
Peer review:
I first met James in 2009 shortly after he co-founded MASECO Private Wealth. Since that time, I have referred many clients to him and have always been impressed with the skill in which he manages his relationships with them. James consistently manages to secure the 'trusted advisor' status that all advisors strive towards but few successfully deliver. James is driven by sensible long term financial planning, an intellectual view of the markets and tax literacy.
April Furnell - Citywealth
07 May 2019

Case Studies

Restructure of affairs for UHNW US/UK family who have lived in the UK for many years

James works with a UHNW US/UK family who have lived in the UK for many years. Over time the family has built up several US Trusts, company structures, and foundations with assets spanning global real estate, land, and commercial property. Many of these structures were set up a number of years ago, and as the trust tax and non-domicile rules have changed over the last decade, James and his team have worked with the family to restructure their affairs to ensure optimal tax treatment and avoid double taxation.

James works with another UHNW US/UK family with significant charitable ambitions. James and his team have worked closely to advise the family to structure their assets in a manner to meet their philanthropic aspirations while at the same time ensuring that their global assets are structured appropriately while they are on the Remittance Basis of taxation.

James has worked with a UHNW US citizen who, over the last 12 years, has moved from being on the Remittance Basis to Arising Basis of taxation in the UK before returning to the US a few years ago. James worked closely with the client in changing the ownership structures of asset pools as the client changed tax status and residency to ensure estate optimisation and avoid double taxation.

The Legal Stuff

This document is for the use of the recipient only and may not be forwarded, copied or distributed without our prior written consent. This document has been prepared by MASECO LLP for educational purposes only and does not constitute investment, tax or any other type of advice and should not be construed as such. The information contained herein is subject to copyright with all rights reserved.

The views expressed herein do not necessarily reflect the views of MASECO as a whole or any part thereof. All investments involve risk and may lose value. The value of your investment can go down depending upon market conditions and you may not get back the original amount invested. Your capital is always at risk. Information about potential tax benefits is based on our understanding of current tax law and practice and may be subject to change. The levels and bases of, and reliefs from, taxation is subject to change. The tax treatment depends on the individual circumstances of each person and may be subject to change in the future. MASECO Private Wealth is not a tax specialist. We recommend that anyone considering investing seeks their own tax advice.

MASECO LLP (trading as MASECO Private Wealth and MASECO Institutional) is established as a limited liability partnership under the laws of England and Wales (Companies House No. OC337650) and has its registered office at Burleigh House, 357 Strand, London WC2R 0HS. The individual partners are Mr J E Matthews, Mr J R D Sellon, Mr A Benson, Mr D R B Dorman, Mr H Q A Findlater, Mr T Flonaes, Mr E A Howison and Ms A L Solana. For your protection and for training and monitoring purposes, calls are usually recorded.

MASECO LLP is authorised and regulated by the Financial Conduct Authority for the conduct of investment business in the UK and is registered with the US Securities and Exchange Commission as a Registered Investment Advisor.

Articles

Adrian Edwards promoted to partner at MASECO Private Wealth

MASECO Private Wealth is delighted to announce the promotion of Adrian Edwards to Partner.

Read more
Magic Circle Awards Special: James Sellon, Managing Partner at MASECO Private Wealth

James Sellon is shortlisted for the Entrepreneurial Individual of the Year award

Read more

Awards

2016 Future Leaders Awards
Entrepreneurial Individual of the Year

Commendations

Top 100 Wealth Management Advisors 2022