Fund ownership, insider trades, and conviction signals from SEC filings. Research the signals as an investor, or let Claude, Codex, and your agents query them through one MCP/API key.
Free credits at signup · no card required · funds, stocks, investors, insiders, and ranks
API-first · MCP-native
Markets and filings, structured, sourced, and exposed as composable tools your agent can call. Every datapoint carries its origin, so the answer is grounded, not guessed.
Every datapoint ships with its source and timestamp, so your agent cites primary evidence instead of hallucinating a number. Traceability isn't a feature here. It's the product.
Connect Arkolith to Claude, ChatGPT, or any MCP client in one step. Small, sharp tools your agent discovers and chains: lookups, search, time-series, and cross-source joins.
Free credits at signup, then pay for the calls you make. Usage-based, no per-seat licenses, cancel anytime. Your agent runs the inference, so the data stays cheap.
There's no dashboard to learn. Your agent connects once, then queries real-world data on your behalf, and every answer comes back with its receipts.
Add the MCP server to Claude or any client, or call the REST API with a bearer token.
Your agent picks the right tools (lookups, search, time-series, cross-source joins) and chains them.
Every field returns with its source, timestamp, and a canonical URL to verify.
Your agent answers with grounded numbers and links you straight back to the primary source.
q: "berkshire" → resolves to a fund
every field carries its origin
source: SEC EDGAR · timestamp · URL
Live 13F holdings, insider trades and institutional ownership. Browse it in seconds, or query it from your agent.
What Buffett, Burry, Ackman and 25+ top investors own, quarter by quarter.
Browse investorsWhich stocks the most hedge funds hold, are buying, and are quietly selling.
Browse stocksInstitutional 13F filers: holdings, AUM and quarter-over-quarter changes.
Browse fundsSEC Form 4 insider buys & sells, normalized within minutes of filing.
Browse insiders13F holdings and Form 4 insider trades are live now. Query them from your agent or browse them yourself, with more sources rolling out.
See what the world's largest funds hold, and how those positions shift quarter over quarter.
Browse fundsFind the names many funds are piling into, or quietly exiting, across the latest filings.
Browse stocksRebuild any fund's holdings over time, straight from raw SEC 13F-HR filings.
Browse fundsConnect the MCP server and ask in plain language. Arkolith returns sourced, structured data.
Read the docsJSON endpoints for funds, holdings, and search. Bearer-token auth, predictable shapes.
Read the docsEach datapoint links back to its primary source, so you can trust what your agent tells you.
Read the docsPublic-domain data, acquired and kept clean, exposed through one API with provenance on every field.
Sign up free, mint a key, and connect Arkolith to your agent in minutes. Real-world data, sourced and ready to query.