The company already works with Quilter, Abrdn, Aviva and Vanguard but has now received investment to help it grow further.
Its latest investment comes from the Canada Pension Plan Investment Board and private equity firm Motive Partners and values FNZ at $20bn (£14.7bn).
The capital raise will help FNZ accelerate its growth through increased research and development, as well as driving growth in markets the company has recently entered, in particular North America.
Adrian Durham, founder and chief executive of FNZ, said: “Today’s announcement represents a resounding endorsement of FNZ’s track record and future strategy.
"The company has successfully demonstrated exponential growth in the scale and depth of customer relationships and geographic expansion with platform revenues more than quadrupling in the past three years to over $1bn per annum, whilst also growing profitably and sustainably.
“Our growth trajectory shows no signs of slowing down, and we are delighted to welcome CPP Investments and Motive Partners to FNZ and look forward to working with them as we further invest in and enhance our core platform, delivering substantial incremental benefits to our customers and their clients.”
In 2020 FNZ's growth plans took a hit when the UK's Competition & Markets Authority ordered it to sell the recently acquired GBST due to the loss of competition in the platform technology market.
The CMS concluded the move would see customers using investment platforms face “higher costs and lower quality services”.
Rob Heyvaert, founder and managing partner at Motive Partners, who will join the FNZ board as a non-executive director, said: "Since FNZ’s inception, its growth trajectory has been extraordinary, and as we combine our strength of expertise, knowledge and access to the global financial services ecosystem, we have the opportunity to deliver an exceptional value-proposition to wealth and asset management customers all over the world to meet growing demand."
FNZ was advised by Lazard during the transaction.