Company
Position
Managing partner
Founder
Index
HNW Wealth Managers
Location
London
Advice type
Financial planning
Investment management
Relationship management
Wealth planning
Client type
Families
HNW
Non-domiciles
UHNW
Sector Focus
Financial Services
Wealth Management & Private Banking
James Sellon
Spear’s Review
MASECO co-founder and managing partner James Sellon manages the wealth and investments of international and UK-based HNW families. ‘Today I spend my time advising larger families, coupled with helping drive the strategic direction of the firm,’ he says.
Built ‘from the ground up’ and proudly independent, MASECO tailors its advice by identifying family members’ emotional, environmental and intellectual needs. ‘Each family is different,’ notes Sellon, who won the Spear’s Award for HNW Asset Manager of the Year in 2016. He provides every client with a personalised plan, emphasising the importance of ‘coordinating the approach between tax and cash flows’.
The firm consistently posts ‘very high’ net promoter scores, Sellon notes, and most of the firm’s advisers have trained at MASECO, resulting in a ‘strong, cohesive culture’.
Rank: Top Recommended

Top Recommended 2025, HNW Wealth Managers