Private Market Tax Data. Digitized. Distributed. Decoded.
K1x is the patented, AI-powered platform that takes tax data from intake to insights for private markets. A Fast Company Most Innovative Companies 2025 honoree and US Fintech Award winner for Best Accounting Tech, K1x streamlines the extraction, validation, and delivery of K-1s, 1099s, W-2s, and 990s—eliminating the nights-and-weekends data drudgery of keying, collating, and copy-pasting so professionals can file faster and focus on strategic, higher-value work.
The platform connects investors, accounting firms, tax software, and taxing authorities in a seamless data workflow—simplifying entity tax operations, compressing cycle times, and reducing rekey risk. It also frees professionals from the robotic work that overwhelms busy season—copy-pasting, keying, collating—so they can focus on higher-value strategy, analysis, planning, and client service.
K1x is trusted across the private-market ecosystem, including:
• 44 of the 100 largest U.S. institutional investors
• 20 of the top 25 accounting firms
• 11 of the top 100 private foundations
• 45 of the top 100 university endowments
• 7 of the top 40 health systems
Battle-tested by the best and built for scale, K1x makes tax time less taxing—turning weeks of manual effort into minutes of digital throughput while restoring time, balance, and impact to the professionals who power the tax system.