What is an SEC Form 13F?
By Outfox Editorial · Reviewed September 2, 2026
Quick answer
Form 13F is a quarterly holdings report filed by institutional investment managers that exercise investment discretion over at least $100 million in certain reportable securities. It shows covered holdings as of quarter-end, not a complete, real-time record of everything the manager bought and sold.
Key takeaways
- A 13F is a delayed snapshot of certain long holdings at the end of a calendar quarter.
- Comparing consecutive filings can identify reported new, increased, reduced, and exited positions.
- The filing entity—not merely the famous person associated with it—is the reporting party.
- Concentration and multi-quarter changes are often more informative than one isolated holding.
What does a 13F contain?
The information table identifies reportable securities, their value, share or principal amount, and certain voting-authority information. The SEC publishes structured 13F data extracted from filed XML, while warning that the official filing remains the authoritative record.
What can change analysis tell us?
When two consecutive quarter-end snapshots are compared carefully, Outfox can describe positions as newly reported, increased, reduced, exited, or unchanged. That language is more accurate than claiming a manager ‘bought today.’
Cross-manager analysis can also reveal where several influential investment firms reported exposure to the same company or theme. Agreement is useful context, but it does not eliminate valuation, timing, or strategy risk.
How Outfox will identify managers
Outfox will connect each profile to the correct SEC filer and CIK. A well-known founder or chief executive may be associated with a firm, but the holdings belong to the filing manager and should not automatically be described as the individual’s personal portfolio.
What this information cannot tell you
- A filing can arrive up to 45 days after quarter-end, so the manager’s current position may differ.
- The filing generally does not reveal the exact purchase date or purchase price.
- It does not provide a complete picture of short positions, cash, every derivative, or every asset class.
- Amendments and confidential-treatment requests can affect what is visible at a particular time.
Primary sources
- Form 13F data sets (opens in a new tab)U.S. Securities and Exchange Commission · Link verified 2026-09-02
- Frequently asked questions about Form 13F (opens in a new tab)U.S. Securities and Exchange Commission · Link verified 2026-09-02
Keep learning
Educational information only. This guide is not personalized investment advice or a recommendation to buy, sell, or hold a security.