About ko.io

ko.io is a SEC data infrastructure platform built for developers, quants, and financial analysts. We aggregate, clean, and serve institutional holdings (13F), insider trades (Form 4), congressional stock activity, and company financials through a fast, developer-friendly API.

What we do

• Process 100M+ rows of SEC filings into clean, queryable data
• Serve data via REST API, MCP server, and natural language (Text-to-SQL)
• Deliver sub-10ms query response times powered by ClickHouse

Based in Stockholm

ko.io is operated from Stockholm, Sweden. Our infrastructure spans multiple global regions to ensure low-latency access worldwide.