Investment Approach
Sonnet LP is a single-purpose custom infrastructure investment vehicle created to invest in Thames Water. An integral part of Fiera Infrastructure’s strategy involves partnering with investors and providing direct access to infrastructure opportunities via co-investments.
Management Style
In April 2013, the team led a consortium of six investors in the purchase of a substantial stake in the business, and now manages the co-investment vehicle while providing asset management services to those investors.
Core Principles
- Single-purpose custom infrastructure investment vehicle
- Co-investment opportunities

Thames Water
Thames Water is the largest water and wastewater utility in the United Kingdom, supplying services to 14 million customers.