ARKK secures £4.5m from Gresham House Ventures to scale tax platform

January 14, 2026

Gresham House Ventures, a growth equity investor backing software and technology-enabled businesses, has made a £4.5m follow-on investment into ARKK, a financial automation and regulatory reporting platform focused on supporting the Office of the CFO.

The latest funding sees Gresham House Ventures doubling down on ARKK, having already made two previous investments in the business since 2019.

The investment is intended to support ARKK’s continued commercial momentum, expand its product roadmap to meet new regulatory reporting requirements, enhance the customer experience, and scale its sales and marketing capabilities.

ARKK’s platform is designed to help businesses make highly accurate regulatory submissions up to 80% faster and at a significantly lower cost than traditional consultancy-based approaches. By replacing repetitive and error-prone manual processes with AI-powered workflow technology, the platform enables organisations to better manage increasingly complex tax and regulatory obligations.

Operating in a global environment where regulatory requirements continue to evolve, ARKK has achieved strong international traction. The company has attracted more than 1,000 customers worldwide, including 65% of FTSE-listed businesses.

Commenting on the investment, Gresham House Ventures portfolio director Marieke Christmann said, “ARKK is addressing a growing and increasingly complex regulatory challenge with a scalable, best-in-class platform. We have built a high level of conviction in the business over multiple investment cycles, particularly in the CEO and senior management’s ability to scale the platform and stay ahead of an increasingly complex regulatory landscape. This follow-on investment reflects our confidence in ARKK’s long-term growth trajectory and our commitment to supporting the team as a long-term partner. We are delighted to continue our partnership and to support ARKK through its next phase of growth.”

ARKK CEO Jenny Himsley added, “We are delighted that Gresham has extended its support and commitment to ARKK as we enter the next phase of our growth journey. Gresham House Ventures has been a highly valued partner since 2019, and this latest investment reflects strong confidence in ARKK’s technology platform and longer-term vision. The additional funding will accelerate innovation across our Automation Platform, enabling us to deliver more advanced, scalable solutions to help businesses around the world simplify and manage increasingly complex tax and regulatory compliance requirements.”