Learn · Last updated September 14, 2026
13F vs PTR: Two Windows Into Big Money
U.S. law opens two big public windows into what powerful investors do with money. Form 13F shows what institutional managers hold, quarter by quarter. Periodic Transaction Reports (PTRs) show what members of Congress and their families trade, filing by filing. They answer different questions, they live in different databases, and almost nobody reads them together.
The two windows, side by side
| Form 13F | Congressional PTR | |
|---|---|---|
| Who files | Institutional managers with ≥$100M in 13F securities | Members of Congress (covering spouse + dependent accounts) |
| What it shows | The whole U.S. long book, as holdings | Individual trades over $1,000 |
| Rhythm | Quarterly snapshot | Within 45 days of each trade, year-round |
| Amounts | Exact reported values | Bands only ($1,001 to $15,000 and up) |
| Blind spots | Shorts, cash, options detail | Intent, exact size, who directed the trade |
| How to read one | Guide | Guide |
The shapes are complementary. A 13F is a portfolio photo with no trades; a PTR is a trade log with no portfolio. One tells you what a $300B manager is holding; the other tells you that a specific disclosure covering a specific week exists at all.
The problem: nobody reads them together
The two systems were built by different laws for different purposes, and it shows:
- Different databases. 13Fs live on SEC EDGAR; PTRs live in the House and Senate disclosure systems. Nothing connects them.
- Different formats. 13Fs are structured filings (with their own parsing quirks); PTRs range from clean e-filings to scanned paper forms.
- Different rhythms. Quarterly seasons versus a year-round drip. The weeks around a 13F deadline are exactly when a notable PTR is easiest to miss.
So the interesting cross-window questions rarely get asked. Is a stock that big funds piled into last quarter also showing up in this month's congressional filings? When a name appears in both windows, that is two independent disclosure systems pointing at the same place, and you would only notice by reading both.
The solution: one roof
Whale's Nest covers both windows in one place, on the same model:
- The 13F side: 300+ curated managers, quarter-over-quarter position changes computed for you, with profiles of the most-watched filers.
- The insiders side: a curated House roster with 12,500+ disclosed trades, paper filings included, synced daily, with analysis when a filing stands out.
Both sides run the same honest deal: history is free to browse, the newest disclosures are Pro, and every number traces to the official filing. Follow a manager, follow a member, or watch a stock through both windows at once.
FAQ
What is the difference between a 13F and a PTR?
A 13F is a quarterly snapshot of an institutional manager's entire U.S. long portfolio, with exact values. A PTR discloses individual trades by a member of Congress or their family within 45 days, in amount bands rather than exact figures.
Which is more current?
PTRs, usually: they are due within 45 days of each trade and arrive year-round, while a 13F describes a quarter-end snapshot that can itself be 45 days old on arrival. Neither is real-time, and both reward reading with the lag in mind.
Can the two be used together?
Yes, and that is the point: a stock appearing in both windows means two independent disclosure systems are pointing at the same place. Doing it by hand means reading EDGAR and the congressional disclosure databases side by side; Whale's Nest tracks both in one place.
13F requirements per the SEC's Form 13F FAQ; PTR requirements per the STOCK Act of 2012. Methodology at /learn/how-we-source-13f-data. Nothing here is investment advice.
