K1x, a Morristown, New Jersey–based AI-native private markets tax data platform, has secured $175 million in a growth investment. 

Investors 

The investment was led by Sumeru Equity Partners, with participation from existing investor Edison Partners. 

Sumeru provides growth capital at the intersection of people and innovative technology, supporting founders and management teams with both funding and scaling partnerships. The firm has invested over $3 billion across more than 50 platforms and add-on investments in enterprise technology companies, primarily in North America and Europe. 

As part of the transaction, Sumeru becomes the majority shareholder. 

K1x Use of Funds 

The company will use the funds to enhance its platform capabilities, accelerate product development using machine learning and generative AI, and strengthen customer experience and support infrastructure. 

About K1x 

Led by John LaMancuso, K1x develops intelligent tax data infrastructure for private markets. Built on a combination of traditional machine learning, generative AI, and agentic tax workflows, the platform enables accounting firms, asset managers, and institutional investors to streamline compliance, reduce risk, and improve operational efficiency. K1x’s patented, AI-native platform automates the extraction, validation, and distribution of tax data across forms, including K-1s, 1099s, W-2s, and 990s. Headquartered in Morristown, New Jersey, the company serves more than 40,000 organizations. 

Funding Details 

Company: K1x 

Raised: $175.0M 

Round: Growth Investment 

Funding Date: April 2026 

Lead Investor: Sumeru Equity Partners 

Additional Investors: Edison Partners 

Company Website: https://k1x.io/  

Software Category: FinTech / Tax Compliance / AI Data Infrastructure 

Source: https://www.businesswire.com/news/home/20260416792552/en