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The short answer: any institutional investment manager with discretion over $100 million or more in Section 13(f) securities.
The longer answer has a few wrinkles worth knowing, especially if you're trying to figure out whether a specific firm has to file, or when.
The Core Test
Two things have to be true:
- The manager exercises investment discretion. That means having the power to decide which securities get bought or sold, even if someone else technically signs off.
- That discretion covers $100 million or more in Section 13(f) securities, measured by fair market value on the last trading day of any month during the calendar year, not total AUM.
Cross that line even once during the year, and the obligation kicks in.
Who That Actually Includes
The SEC's definition is broad. It covers:
- Hedge funds and hedge fund management companies
- Registered investment advisers
- Banks and bank trust departments
- Insurance companies
- Broker-dealers exercising discretion
- Pension funds, public and private
- Endowments and foundations
- Family offices
- Corporations managing their own investment portfolios
Foreign managers are included too, as long as they use the U.S. mail or another means of interstate commerce and clear the threshold. In practice, the filer list runs from Vanguard, BlackRock, and State Street down to small boutique hedge funds and single-family offices. Over 5,000 institutions file each quarter.
Who's Exempt
The one clean exemption: a natural person investing solely for their own account. Managing your own money, no matter how much, doesn't make you an institutional investment manager.
The moment that person manages someone else's account, even informally, they become an institutional investment manager under the rule. They can request confidential treatment from the SEC, but they still have to file.
Once You Cross the Threshold
The obligation doesn't reset each quarter. A manager that crosses $100 million at any month-end must file for the rest of that year and the following year's first three quarters, even if holdings dip back below the threshold in the meantime.
There are three flavors of the filing itself:
- 13F-HR (Holdings Report): all your reportable securities are in this filing
- 13F-NT (Notice): none of your securities are, because another manager is reporting them
- Combination Report: a mix of both, common when two managers share discretion over the same account
When discretion is shared between two managers, either can file on behalf of both, as long as the filing discloses the shared relationship.
What Happens If You Get It Wrong
The SEC doesn't grant extensions. Late filers are expected to submit immediately rather than wait for the next quarter, and persistent late or inaccurate filings have led to enforcement actions and financial penalties. Beyond the fine, it's the kind of miss that raises questions from investors about a firm's operational discipline.
Why This Matters Beyond Compliance
If you're on the other side of this, raising capital rather than filing, knowing who's required to file (and who already does) tells you where the public data actually exists. Every 13F filer, from a pension fund to a single-family office, is a name on a list with a documented equity position. That's a starting point for outreach that a lot of prospecting never gets to.
How Dakota Marketplace Maps the Entire 13F Filer Universe
Dakota ingests every 13F filing daily and sorts each filer into a complete allocator profile, not just a name on an EDGAR list:
- Hedge funds matched to fund-level profiles, strategy data, and confirmed contacts
- RIAs and equity managers linked to Form ADV data, including AUM, client types, and headcount
- Pensions connected to plan minutes, trustee meetings, and mandate data
- Endowments and foundations linked to Form 990 data on assets, revenue, and investment policy
- Family offices identified from filing patterns and matched to known profiles
- Wirehouses, broker-dealers, banks, and insurers mapped to their platform and channel structure
Every filer is also tagged by what they actually hold, across a taxonomy of 19 asset classes and 236 sub-asset classes covering both public and private markets. That's what turns "this firm files a 13F" into "this firm already holds positions in your asset class," which is a warmer starting point than AUM alone.
Fund managers can filter the full filer universe by investment firm, product structure, AUM, asset class, sub-asset class, active or passive management, and filing period, with confirmed contacts and everything else flowing directly into Salesforce, HubSpot, Backstop, or DealCloud.
Book a demo to see the full 13F filer universe, organized and ready to work.
