13F Insight
SEC institutional filings analysis for retail investors — 13F holdings, 13D/G activist filings, Form 4 insider trades, plus an embedded AI agent on every entity page.
AI Documentation Files
Access the llms.txt files for this website
13F Insight indexes SEC EDGAR institutional filings (380K+ 13F-HRs since 1999, 480K+ 13D/Gs since 1994, 4.37M+ Form 4 transactions since 2003) and surfaces them via cross-entity search, position-change diffs, and a tier-gated AI agent. Editorial hubs at /research, /learn, /news produce data-grounded articles.
Key Focus Areas
- 13F Holdings filings — quarterly institutional position tracking
- 13D/G Activist filings — major ownership and activist investor alerts
- Form 4 Insider Transactions — real-time executive buy/sell tracking
- AI Agent — embedded on every fund, filer, and ticker page
- Research & Learn — data-grounded editorial content on SEC filings
About llms.txt Implementation
13F Insight's llms.txt and llms-full.txt (33KB structured knowledge base) document the full product surface: data coverage, search API, AI agent capabilities, filing schemas, and editorial content — enabling AI assistants to accurately answer questions about institutional investing and SEC filings.
Developer Tools
Explore tools created to help you work with llms.txt
- LLMs.txt Checker Chrome ExtensionCheck if websites implement llms.txt and llms-full.txt files
- LLMS.txt VSCode ExtensionSearch and explore llms.txt files directly in VS Code
- MCP LLMS.txt ExplorerExplore and analyze llms.txt files using MCP
- LLMs Txt Raycast ExtensionSearch and explore llms.txt files directly in Raycast
- llmstxt CLIInstall llms.txt documentation directly into your AI coding agents
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