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What is a 13F filing?

A 13F is the quarterly long-equity holdings disclosure institutional investment managers with ≥$100M in qualifying U.S. equity assets must file with the SEC, due within 45 days of quarter-end.

Last updated: 2026-05-01. Source: SEC EDGAR.

Who files a 13F, and when

Section 13(f) of the Securities Exchange Act of 1934 requires institutional investment managers exercising investment discretion over ≥$100M of Section 13(f) securities to report their holdings quarterly. The list of qualifying securities is published by the SEC each quarter.

The 45-day filing deadline is generous on purpose — the disclosure is intended to inform regulators and the public, not to give competitors a real-time window into trading. By the time a 13F is public, the underlying positions are already 45+ days stale.

What's in a 13F (and what isn't)

In: Long positions in qualifying U.S.-listed equities (common stock, ADRs, ETFs), some convertible debt, and certain options on qualifying securities.

Out: Short positions, foreign-listed equities, cash, fixed income, most derivatives, private investments, and any non-13(f) securities. The 13F is not a complete portfolio — it is a long-equity slice.

This asymmetry matters. A manager whose 13F shows zero position in a name may still hold the name short or via derivatives. Reading 13Fs as a complete view of a manager's book is the most common misuse of the disclosure.

13F-HR vs. 13F-NT — the variant taxonomy

13F-HR: Holdings Report. The standard variant containing the actual position list. SecFilingDex tracks 23 13F-HR filings.
13F-NT: Notice filing. A manager whose holdings are already reported on another manager's 13F-HR (e.g., a sub-adviser relationship) files a 13F-NT pointing to the primary report. SecFilingDex tracks 0 13F-NT filings.
13F-HR/A: Amendment to a prior 13F-HR — restated holdings, corrected counts, or post-filing additions.

Confidential treatment requests

A manager can request confidential treatment for specific positions — typically when public disclosure would reveal an ongoing accumulation. SEC review can take months; granted positions appear on the 13F when the confidentiality period expires. This explains why some 13Fs disclose new positions in the quarter after the position was actually built — a useful signal in itself.

Our view

The 13F is a great information source and a terrible alpha source. By the time the disclosure is public the position is 45+ days stale. The compounding lens is qualitative — what does this manager own at the level of theme, sector, and concentration — not quantitative replication. Following 13Fs to copy trades is a losing game; following 13Fs to understand mandates and risk tolerance is durable.

See live data

Browse live 13F filings — 33 filings indexed. Updated as new EDGAR submissions are ingested.

Glossary

13F: Quarterly report under Section 13(f) of the Securities Exchange Act of 1934. Filed by institutional investment managers exercising investment discretion over ≥$100M of Section 13(f) securities.
13F-HR: Holdings Report variant of 13F. Contains the actual list of positions. Filed quarterly within 45 days of quarter-end.
13F-NT: Notice variant of 13F. Filed by managers whose holdings are reported on another manager's 13F-HR; the 13F-NT points to the primary filer rather than re-listing positions.
Section 13(f) securities: The SEC-published list of securities subject to 13F reporting. Includes most U.S.-listed common stock, ADRs, qualifying ETFs, and certain convertible debt and options.
Confidential treatment: An exemption a 13F filer can request from the SEC to delay public disclosure of specific positions. Granted positions appear on the 13F only when the confidentiality period ends.