Glossary · Allocator type
Family Office
Also called: family offices · family investment office
In US securities law "family office" is defined in one rule, the Advisers Act exclusion in Rule 202(a)(11)(G)-1, which Regulation D borrows; market usage is much wider.
A family office is a private organisation that manages the investments and often the wider financial affairs of one wealthy family (a single-family office) or of several (a multi-family office); it is a kind of allocator, not a legal form.
Once a family's wealth is large and complex enough, it may hire its own staff to invest the money, keep the books, handle tax and legal work, and coordinate trusts, philanthropy and succession. That team is the family office. Some are a few people inside the family company; others run institutional-style investment programmes. US securities law defines "family office" in one rule, which decides whether the office is outside the definition of investment adviser; Regulation D borrows that definition for investor eligibility.
Operating models
- Single-family office (SFO). Owned and controlled by one family and serving only that family, including several generations and branches.
- Multi-family office (MFO). Serves several unrelated families. Some began as one family's office and took on others ("private" MFOs); others are independent advisory firms or units of banks and trust companies.
- Embedded office. Staff inside the family's operating company or holding company handle the family's investments, often without a separate legal entity.
- Outsourced or "virtual" office. A small core team coordinates external advisers, banks and administrators instead of hiring in-house.
For classification, an SFO is an asset owner; an MFO can be an allocator, an intermediary or both, depending on whether it decides or advises.
What US law says, and what it does not
The definition US securities rules use is the SEC's Family Office Rule (Advisers Act Rule 202(a)(11)(G)-1), which defines a family office in order to exclude it from the definition of investment adviser. To qualify, an office must have no clients other than family clients, be wholly owned by family clients and exclusively controlled (directly or indirectly) by family members or family entities, and not hold itself out to the public as an investment adviser. A narrow grandfathering provision (paragraph (c)) keeps within the rule an office that was not registered or required to be registered on 1 January 2010 while it advises certain persons it was already advising before that date; an office that qualifies only under that paragraph is deemed an investment adviser for the purposes of section 206(1), (2) and (4) of the Advisers Act. An organisation called a family office may not meet those conditions. An office that fails them is an investment adviser if it otherwise meets the Advisers Act definition (advising others about securities, as a business, for compensation) and must register unless an exemption applies; an MFO serving unrelated families generally cannot rely on the rule at all.
Other rules borrow the SEC definition for investor eligibility:
- Accredited investor. Since the 2020 amendments, a family office within the SEC rule is an accredited investor under Rule 501(a)(12) if it has more than $5 million of assets under management, was not formed to acquire the securities offered, and its investment is directed by a person with enough financial knowledge and experience to evaluate the merits and risks. Its family clients qualify under Rule 501(a)(13) when that office directs their investment.
- Qualified purchaser. A company owning at least $5 million in investments that is owned by family members related as siblings, spouses or lineal descendants (or by their estates, or foundations, charities or trusts set up for them), or any person that owns and invests on a discretionary basis at least $25 million in investments for its own account or for other qualified purchasers, is a qualified purchaser under Investment Company Act section 2(a)(51)(A)(ii) and (iv).
- Holdings reporting. The Advisers Act exclusion does not remove other filings: an office that exercises investment discretion over accounts holding section 13(f) securities with an aggregate fair market value of at least $100 million on the last trading day of any month of a calendar year files Form 13F.
Other jurisdictions use their own definitions; they are not described here.
Family office roles
Family office job titles are market usage, not defined terms, and in a small office one person often holds several of them. Titles used in the market include an executive director or chief of staff who coordinates the family's affairs and outside advisers; a chief investment officer and investment team who run the portfolio; a chief financial officer or controller responsible for accounting, consolidated reporting and tax; and a general counsel for legal and trust matters. "Gatekeeper" is informal usage for whoever screens approaches from managers and deal sponsors before they reach the principal or the investment committee.
In US law two of these facts matter. First, the SEC rule treats a key employee as a family client, so the office can advise senior staff and let them invest alongside the family without losing the exclusion. A key employee is an executive officer, director, trustee, general partner or person in a similar capacity, or an employee who participates in the office's investment activities as part of their regular duties (not solely clerical, secretarial or administrative work) and has done that work, at the office or in substantially similar work for another company, for at least 12 months. Second, the accredited investor test above turns on who directs the office's investments, so the person or committee that decides is a fact to record, not to infer from a title.
How family offices invest in private markets
Family offices use the same routes as institutions and several that institutions rarely use. They commit to funds as limited partners; take co-investments alongside sponsors; make direct investments, minority or control, sometimes holding a company indefinitely; join club deals with other families; and back independent sponsors and search funds deal by deal. Most combine several routes.
Three features shape behaviour more than size does. Governance: authority may sit with the principal, a family investment committee, a professional CIO or a mix, and can change at a generational handover (see family governance). Source of wealth: an operating business often gives sector knowledge and a preference for familiar industries, along with concentration the office may want to offset. Liquidity needs: distributions to family members, tax payments, philanthropy and capital for the family business compete with capital calls. None of these is visible from the label "family office", which is why classification relies on evidence of structure and decision rights rather than self-description.
Not the same as
- SEC Family Office Rule (Rule 202(a)(11)(G)-1): The Family Office Rule is a US legal exclusion from the Advisers Act; family office is the wider market term for an organisation, which may or may not meet the rule.
- Private Bank and Wealth Manager: A private bank or wealth manager is a commercial provider serving many unrelated clients from its own platform; a family office works for one family or a limited group of families.
- High-Net-Worth Individual: A high-net-worth individual is a person; a family office is the organisation some such individuals and families set up to manage their wealth.
- Registered Investment Adviser (RIA): A family office within the SEC rule is not an investment adviser at all; an MFO, or an SFO outside the rule, may be a registered adviser.
How it is classified
- Classify an SFO as an allocator (asset owner).
- Classify an MFO as an allocator when it commits capital with discretion, and as an intermediary when it only advises; record both facets when it does both.
- An office that files Form ADV as a registered adviser is not relying on the family office exclusion; record it as an adviser.
- Record the investing vehicle as the LP and relate it to the office and the family; never infer wealth, AUM or cheque size from the label.
Common mistakes
- Using the SEC Family Office Rule as the general definition of a family office. It is a US exclusion from the Advisers Act definition of investment adviser.
- Assuming "family office" implies a minimum asset size, a cheque size or a decision speed. No such threshold is defined, and unsourced figures should not be carried into analysis.
- Treating a multi-family office's interest as a commitment by its client families, or the reverse. Whether the MFO has discretion decides who commits.
- Merging a family office with the family's operating company, foundation or trusts. They are separate entities that are related.
- Assuming family offices only invest directly, or only through funds. Most combine routes, and the mix changes with governance and generations.
Edge cases
- An office owned in part by someone who is not a family client, controlled by anyone other than family members or family entities, or advising a family friend falls outside the SEC exclusion even if it serves one family in practice. Part-ownership by a key employee does not, because key employees are family clients.
- An embedded office inside an operating company may have no separate legal entity; the investing vehicles (LLCs, trusts, partnerships) are the LPs of record.
- A family foundation administered by family office staff is a separate charitable entity with its own tax rules.
Questions
Is a family office regulated?
Not as a category. In the US, an office that meets the SEC Family Office Rule is not an investment adviser under the Advisers Act; one that does not, and that advises on securities as a business for compensation, is an investment adviser and must register unless an exemption applies. Other rules, such as Form 13F, apply on their own terms.
Is a family office an accredited investor?
A family office within the SEC rule that has more than $5 million under management, was not formed for the investment, and whose investment is directed by a knowledgeable person is accredited under Rule 501(a)(12). An office outside the rule may still qualify under another entity category.
Sources
- 17 CFR 275.202(a)(11)(G)-1 - Family offices. U.S. Securities and Exchange Commission (CFR text via eCFR; LII mirror), eCFR current as of 2026-09-29; adopted 2011 (76 FR 37994), amended 2016 (81 FR 60457). Status: in force (checked 2026-10-01). 17 CFR 275.202(a)(11)(G)-1(a), (b)(1)-(3), (d)(4)(iii), (d)(6), (d)(8) — supports: Exclusion from the definition of investment adviser and its three conditions; key employees as family clients; key employee definition (12-month test)
- 17 CFR 230.501 - Definitions and terms used in Regulation D (accredited investor). U.S. Securities and Exchange Commission (CFR text via eCFR; LII mirror), eCFR current as of 2026-09-29; last amended 2025-02-18 (technical, 90 FR 9684); last substantive amendment effective 2020-12-08 (85 FR 64234). Status: in force (checked 2026-10-01). 17 CFR 230.501(a)(12)(i)-(iii), (a)(13) — supports: Family office and family client accredited investor categories, including direction of investment by a knowledgeable person
- Accredited Investor Definition (final rule), Release No. 33-10824. U.S. Securities and Exchange Commission, Adopted 2020-08-26; 85 FR 64234 (2020-10-09); effective 2020-12-08. Status: in force (checked 2026-10-01). Release 33-10824 (effective 2020-12-08) — supports: 2020 addition of family office and family client categories
- 15 U.S.C. 80a-2 - Definitions (Investment Company Act sec. 2, incl. 2(a)(48) BDC and 2(a)(51) qualified purchaser). U.S. Congress (United States Code; LII mirror), Current US Code text as published by LII (accessed 2026-10-01). Status: in force (checked 2026-10-01). Investment Company Act sec. 2(a)(51)(A)(ii), (iv) — supports: Family company $5 million and $25 million discretionary qualified purchaser tests
- 17 CFR 240.13f-1 - Reporting by institutional investment managers of information with respect to accounts over which they exercise investment discretion (Form 13F). U.S. Securities and Exchange Commission (CFR text via eCFR; LII mirror), eCFR current as of 2026-09-29; no substantive amendment since eCFR baseline. Status: in force (checked 2026-10-01). 17 CFR 240.13f-1(a)(1) — supports: Form 13F threshold: $100 million aggregate fair market value of 13(f) securities on the last trading day of any month of a calendar year
- 15 U.S.C. 80b-2 - Definitions (Advisers Act s.202). U.S. Congress (US Code via LII), Current US Code text as published by LII (accessed 2026-10-01). Status: in force (checked 2026-10-01). Advisers Act sec. 202(a)(11) (definition and exclusion (G)) — supports: Investment adviser definition; family office exclusion by SEC rule
- 15 U.S.C. 80b-3 - Registration of investment advisers (Advisers Act sec. 203, incl. 203(l) and 203(m)). U.S. Congress (United States Code; LII mirror), Current US Code text as published by LII (accessed 2026-10-01). Status: in force (checked 2026-10-01). Advisers Act sec. 203(a) — supports: Registration requirement for investment advisers, subject to exemptions