A master-feeder structure is a hedge fund arrangement in which two or more “feeder” funds collect capital from different investor groups and channel it into a single “master” fund that holds the portfolio and executes every trade. It is the standard architecture for hedge funds that take money from U.S. taxable investors and from foreign or U.S. tax-exempt investors at the same time, because it lets each group enter through a vehicle suited to its tax and regulatory situation without splitting the portfolio across separate accounts.
Pooling the assets in one place lets the manager run a single strategy, cut transaction costs, and avoid allocating each trade across multiple accounts. The legal framework surrounding the structure, however, is where most of the work sits: exemptions under the Investment Company Act, ERISA thresholds, investor eligibility rules, and layered compliance filings all shape how the entities are organized and how the manager operates them.
How the Pieces Fit Together
The master fund owns the securities, enters the trades, and holds the portfolio. It maintains a single set of books for the entire investment program, and every dollar invested through the structure ends up there. The master fund is usually organized outside the United States, often in the Cayman Islands, which allows it to qualify as a non-U.S. person for certain SEC regulatory purposes.
Feeder funds sit between investors and the master fund. Each feeder collects capital from its investor group and contributes it to the master fund in exchange for a proportional ownership stake. A feeder’s only meaningful asset is its interest in the master fund, and feeders do not trade independently. When the master fund gains 8% in a quarter, each feeder’s holdings appreciate by roughly the same percentage, adjusted for its share of the pool.
The typical setup involves two feeders. One is domestic, built for U.S. taxable investors. The other is offshore, built for non-U.S. investors and for U.S. tax-exempt entities. Some structures add a third feeder for a specific investor class or regulatory need, but the two-feeder model remains standard.
Why Onshore and Offshore Feeders Exist
The domestic feeder is typically a Delaware limited partnership or LLC taxed as a partnership. It serves U.S. individuals, corporations, and other taxable entities who need pass-through tax treatment so gains and losses flow directly to their personal returns.1Internal Revenue Service. Hedge Fund Basics These investors want the tax characteristics of each trade preserved at the individual level rather than trapped inside a corporate entity.
The offshore feeder is typically organized as a corporation in a jurisdiction with no local income tax, such as the Cayman Islands. It serves two groups with very different motivations. Non-U.S. investors use it to avoid direct exposure to the U.S. tax system. U.S. tax-exempt investors, like pension funds, endowments, and charitable foundations, use it for a less obvious but critical reason.
When a tax-exempt entity invests directly in a partnership that uses leverage or engages in certain business activities, the income can be reclassified as “unrelated business taxable income,” which is taxable even for otherwise exempt organizations. The offshore corporate feeder acts as a blocker: because the corporation sits between the tax-exempt investor and the partnership, income is taxed at the corporate level rather than flowing through to the investor. The corporate entity absorbs the tax hit, but it also prevents the far worse outcome of a pension fund or endowment owing taxes on income it assumed was exempt.
How the Structure Is Taxed
The master fund is generally organized as a partnership for U.S. tax purposes, so it files an informational return but does not pay entity-level income tax.1Internal Revenue Service. Hedge Fund Basics All income, gains, losses, and deductions pass through to the feeder funds in proportion to each feeder’s ownership percentage. The domestic feeder, also taxed as a partnership, passes those items through again to its individual investors, who report them on their own tax returns. That avoids double taxation.
The offshore feeder, structured as a corporation, does not pass income through. It functions as a taxable entity that recognizes income at the corporate level. For non-U.S. investors, this means no direct U.S. tax filing obligation, though withholding may apply to certain U.S.-source income. For tax-exempt U.S. investors, the corporate layer blocks the pass-through of unrelated business taxable income.
One trade-off: because the master fund is usually organized in a no-tax jurisdiction like the Cayman Islands, it cannot claim treaty benefits that might reduce withholding taxes on dividends or interest from certain countries. Managers factor this into portfolio construction, but for strategies focused on capital gains rather than income, the impact is modest.
Investment Company Act Exemptions and Investor Eligibility
Any pooled investment vehicle that holds securities risks being classified as an “investment company” under federal law, which would subject it to the heavy regulation designed for mutual funds. Master-feeder hedge funds avoid that by relying on one of two exemptions.
Section 3(c)(1) of the Investment Company Act exempts any fund whose securities are held by no more than 100 beneficial owners and that does not make a public offering. Section 3(c)(7) removes the 100-investor cap entirely but requires that every investor be a “qualified purchaser.”2Office of the Law Revision Counsel. 15 U.S. Code 80a-3 – Definition of Investment Company A qualified purchaser is an individual who owns at least $5 million in investments, or an entity that owns at least $25 million.3U.S. Securities and Exchange Commission. Defining the Term Qualified Purchaser Under the Securities Act of 1933 Larger hedge funds that want more than 100 investors almost always rely on 3(c)(7), which pushes the investor base toward institutions and ultra-high-net-worth individuals.
In a master-feeder, look-through rules apply. When a feeder fund owns 10% or more of the master fund and would itself be an investment company but for one of these exemptions, the SEC counts through the feeder to the underlying investors for purposes of the 100-person limit.2Office of the Law Revision Counsel. 15 U.S. Code 80a-3 – Definition of Investment Company A manager cannot use feeder funds to compress hundreds of investors into what appears to be two or three.
At the investor-eligibility level, feeder funds offered under Regulation D must verify that each investor meets minimum financial thresholds. For most hedge fund feeders, investors must at least qualify as accredited. An individual qualifies with income exceeding $200,000 in each of the two most recent years ($300,000 jointly with a spouse) and a reasonable expectation of maintaining that level, or a net worth above $1 million excluding the value of a primary residence.4eCFR. 17 CFR 230.501 – Definitions and Terms Used in Regulation D Funds relying on Section 3(c)(7) go further and require every investor to be a qualified purchaser. Subscription documents include detailed questionnaires that verify these thresholds before capital is accepted.
The ERISA 25 Percent Rule
Pension plans and other employee benefit plans are governed by ERISA, which imposes strict fiduciary duties on anyone managing plan assets. If “benefit plan investors” hold 25% or more of any class of equity interests in a fund, the fund’s entire asset pool is treated as plan assets, and the fund manager becomes an ERISA fiduciary subject to prohibited transaction rules and other obligations that most hedge fund managers want to avoid.5GovInfo. 29 CFR 2510.3-101 – Definition of Plan Assets
Benefit plan investors include employee benefit plans, IRAs, and entities whose underlying assets include plan assets because of a plan’s investment in that entity. When calculating whether the 25% threshold has been breached, the regulation excludes equity held by the fund manager, anyone with discretionary authority over the fund’s assets, and their affiliates.5GovInfo. 29 CFR 2510.3-101 – Definition of Plan Assets The denominator is smaller than total fund equity, so the threshold is easier to trip than it looks.
In practice, managers monitor benefit plan investor participation closely and may refuse new capital from pension plans or similar sources once participation approaches 25%. Some offering documents cap benefit plan investment at a level below the threshold to maintain a cushion. Tripping this rule retroactively is one of the more expensive compliance failures in fund management, because every transaction the manager entered into while unknowingly acting as an ERISA fiduciary becomes subject to scrutiny.
Formation Documents
Before a master-feeder structure can accept capital, the manager needs a comprehensive set of legal documents. The Private Placement Memorandum is the primary disclosure document. It covers the fund’s strategy, risk factors, fee terms, withdrawal restrictions, and the identities of the manager and key personnel, and it specifies the jurisdiction of organization (typically Delaware for the domestic feeder and the Cayman Islands for the offshore feeder and master fund), leverage limits, and any investment restrictions. The document must be thorough enough that an investor cannot later claim they were not warned about a material risk.
The Limited Partnership Agreement (for LP-structured entities) or Operating Agreement (for LLCs) governs the legal relationship between the manager and the investors. It spells out capital contribution mechanics, distribution waterfalls, voting rights, and the circumstances under which the manager can be removed. Subscription documents are the forms investors complete to commit capital, and they include the accredited investor or qualified purchaser questionnaires.
Bad Actor Disqualification Checks
Funds relying on Rule 506 of Regulation D to avoid securities registration must verify that no “covered person” involved in the offering has a disqualifying event in their background. Covered persons include the fund’s directors and executive officers, the investment manager, anyone who owns 20% or more of the fund’s voting equity, and any person paid to solicit investors. Disqualifying events include securities fraud convictions and certain court or administrative sanctions. The manager must conduct these checks before each sale of securities, and a single disqualifying event can shut down the entire offering until the covered person is removed or an SEC waiver is obtained.
Entity Registration and Regulatory Filings
Forming the entities involves filing organizational documents with the relevant government authorities. For a Delaware limited partnership, this means filing a Certificate of Limited Partnership with the Delaware Division of Corporations. For the offshore entities, the Cayman Islands Registrar of Exempted Limited Partnerships charges a registration fee of approximately $1,220.6Cayman Islands General Registry. Exempted Limited Partnership Act – Fee Schedule Each entity also needs its own Employer Identification Number from the IRS for tax filing and brokerage account purposes.
The manager files Form ADV with the SEC to register as an investment adviser (or to report as an exempt reporting adviser, depending on the fund’s size and strategy).7Securities and Exchange Commission. Form ADV General Instructions The fund itself files a Form D notice with the SEC no later than 15 calendar days after the first sale of securities, which claims the Regulation D exemption from full securities registration.8U.S. Securities and Exchange Commission. Frequently Asked Questions and Answers on Form D Most states also require their own notice filings (often called “blue sky” filings) following the federal Form D submission, with fees typically ranging from a few hundred to over a thousand dollars depending on the state.
Managers whose strategies involve commodity futures or swaps may also need to register with the Commodity Futures Trading Commission as a commodity pool operator or commodity trading advisor, adding another layer of registration and ongoing reporting.
Ongoing Compliance Obligations
Launching the fund is the easy part. The annual compliance burden is where costs and complexity accumulate.
Annual Audit and the Custody Rule
Registered investment advisers with custody of client assets must either undergo an annual surprise examination by a PCAOB-registered accounting firm or rely on the audit exemption for pooled investment vehicles. Under the exemption, the fund must distribute GAAP-audited financial statements to all investors within 120 days of its fiscal year-end, prepared by an independent PCAOB-registered and inspected auditor.9eCFR. 17 CFR 275.206(4)-2 – Custody of Funds or Securities of Clients by Investment Advisers Fund-of-funds structures get 180 days. If the manager misses the delivery window, the fund loses the exemption and must comply with the full surprise examination requirements. In a master-feeder, both the master fund and each feeder fund typically undergo separate annual audits.
Form PF Reporting
Advisers to private funds with at least $150 million in private fund assets under management must file Form PF with the SEC. The filing is annual for smaller advisers and quarterly for those classified as large hedge fund advisers (currently those with $1.5 billion or more in hedge fund assets). Large hedge fund advisers also face event-reporting obligations that require disclosure within 72 hours of certain triggering events, such as extraordinary investment losses or significant margin increases. The SEC proposed changes in 2025 that would raise the threshold for smaller advisers and streamline some reporting categories, but as of 2026 the existing framework remains in effect for most filers.
When a Parallel Fund Makes More Sense
Master-feeder is not the only option. The main alternative is a parallel fund structure, where the manager runs separate onshore and offshore funds that invest side by side in the same positions rather than pooling into a single master fund. The right choice depends on the fund’s size, strategy, and investor base.
Master-feeder’s core advantage is operational simplicity at the portfolio level. The manager trades one account, maintains one set of counterparty relationships, and holds one consolidated portfolio. Positions automatically rebalance when a feeder receives new subscriptions or processes redemptions, because the feeder simply buys or sells its interest in the master fund. The combined asset pool can also reach size thresholds faster, which matters for qualifying as a qualified institutional buyer under SEC Rule 144A or for accessing better terms from prime brokers.
Parallel structures offer more flexibility. Because each fund trades independently, the manager can tailor positions to each fund’s tax profile. The onshore fund might hold an asset for long-term capital gain treatment while the offshore fund trades more actively. Parallel structures also avoid the cost of organizing and administering the additional master fund entity, and they sidestep the treaty limitation problem since each fund can be organized in a jurisdiction that provides favorable tax treaty access.
The downside of parallel funds is real. Every trade must be allocated between the two funds, creating ongoing fair-allocation compliance work. Positions can drift apart over time as subscriptions and redemptions hit each fund differently, meaning investors in theoretically identical strategies may see different returns. For most managers running a single strategy for a mixed investor base, master-feeder wins on efficiency. Parallel structures tend to make more sense when the strategy benefits from jurisdiction-specific tax planning or when the investor base is concentrated enough that the allocation burden stays manageable.