Congress / Start here
How to track Congress stock trades without losing the context
Find House and Senate stock disclosures, read transaction dates and value ranges, and understand the reporting delay before following a trade.
Read the guideA publication by Mountainhead ResearchFollow the money. Check the source.
The Paper Trail
Read the record. Find the signal.
A field guide to public money: congressional trades, insider filings, institutional holdings and the records behind market research.
From the research desk
07 guides / Primary sources
Institutional
13F filings explained: a snapshot is not a hedge fund's live portfolio
Read a 13F's reporting period, shares and value correctly. Learn the 45-day deadline, coverage limits, amendments and why it is not a live portfolio.
For developers
Use Mountainhead's MCP server in Claude Code and Cursor
Connect Mountainhead's financial research MCP server to Claude Code or Cursor with browser sign-in, then build a cited workflow for trades and SEC filings.
Setup guides
How to connect Mountainhead to Claude in four steps
Add Mountainhead to Claude as a custom MCP connector in four steps, with no API key, then ask about Congress trades, insider buys and 13F holdings.
Insider trades
How to read SEC Form 4: an insider purchase is only the beginning
Learn how Form 4 reports insider transactions, what P, S, A and M codes mean, and why ownership, footnotes and timing belong beside every trade.
Public officials
Cabinet stock trades: how to read OGE Form 278-T
Find executive-branch financial disclosures, distinguish periodic transactions from annual holdings, and read the dates and amount ranges correctly.
Movement
Why private jets disappear from flight trackers
Understand FAA LADD filtering, ADS-B receiver coverage and stale positions, plus what a missing flight trace can and cannot tell a researcher.
The Paper Trail, by email
A better question for your inbox.
Occasional guides to the public records behind the markets. Sources included. Hype left out.
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