If your firm manages $100 million or more in qualifying securities, the SEC requires you to file Form 13F every quarter. Yet for many newly registered investment advisors and compliance officers stepping into this role for the first time, the form can feel opaque — a tangle of XML requirements, CUSIP lookups, and discretion classifications that seem designed to confuse.
This guide breaks it all down. By the end, you’ll know exactly what Form 13F is, who must file, what gets reported, and how to avoid the mistakes that generate costly EDGAR rejection errors.
The Origins of Form 13F
Section 13(f) was enacted as part of the Securities Acts Amendments of 1975. Congress wanted to create a centralized, public repository of data about how large institutional investors were moving money through the equity markets. The goals were twofold: improve transparency about the influence of major asset managers on securities markets, and establish a uniform reporting standard.
The result was Form 13F — a disclosure that, when filed, becomes public record on the SEC’s EDGAR system. Hedge funds, pension managers, mutual fund companies, and RIAs alike must file if they cross the $100 million threshold.
Who Is Required to File?
You must file Form 13F if you are an “institutional investment manager” that exercises investment discretion over $100 million or more in Section 13(f) securities. This isn’t limited to any one type of firm. Banks, broker-dealers, holding companies, insurance companies, pension funds, and registered investment advisors all fall under this umbrella.
What Securities Must Be Reported?
Not all holdings are reportable. The SEC maintains a quarterly list of “Section 13(f) securities,” and you must cross-reference your holdings against this list to determine what to include. The most common qualifying security types are: exchange-traded equity securities (stocks), shares of closed-end investment companies, shares of exchange-traded funds (ETFs), certain convertible debt securities, and equity options and warrants.
Notably, open-end mutual funds do not appear on the 13F securities list and should not be reported. Only positions held as of the last trading day of the calendar quarter are included.
Understanding Discretion Classifications
One of the most misunderstood parts of Form 13F is how to classify each position’s type of investment discretion. The form uses three categories. Sole Discretion means you, as the filer, have full and unilateral authority to determine which securities to buy, sell, or hold. Shared-Defined means discretion is shared between you and another legal entity you control — or an entity that controls you. Shared-Other covers any other shared discretion arrangement that doesn’t fall into the shared-defined category.
A single security can appear on a 13F with multiple discretion types — for example, if part of a position is held with sole discretion and another tranche is shared with a co-manager.
When Is the Filing Deadline?
Form 13F must be filed within 45 days after the end of each calendar quarter. Q1 (January–March) is due by May 15. Q2 (April–June) is due by August 14. Q3 (July–September) is due by November 14. Q4 (October–December) is due by February 14. If the deadline falls on a weekend or holiday, the SEC typically extends it to the next business day.
How the Filing Is Submitted
Form 13F must be submitted in XML format through the SEC’s EDGAR filing system. The XML file must conform to the SEC’s schema specification precisely — column order, data types, and formatting are all validated automatically upon submission. A single schema error, a CUSIP formatted incorrectly, or a non-round market value can cause the entire submission to be rejected.
At File|13F, we handle the entire technical preparation process — cross-referencing your holdings against the SEC’s quarterly 13F securities list, applying the correct discretion and voting classifications, and generating a compliant XML file ready for upload to EDGAR.
For full details on filing requirements, visit our Form 13F FAQ. Ready to get started? View our simple pricing or contact us today.