--- title: "Master-Feeder Funds: The Structure Behind a 13F Filer" type: learn slug: master-feeder-funds-structure-behind-a-13f-filer canonical_url: https://13finsight.com/learn/master-feeder-funds-structure-behind-a-13f-filer published_at: 2026-06-01T18:52:47.370Z updated_at: 2026-06-01T18:53:13.250Z author: Sarah Mitchell author_title: Education Editor author_url: https://13finsight.com/authors/sarah-mitchell word_count: 951 locale: en source: 13F Insight --- # Master-Feeder Funds: The Structure Behind a 13F Filer > Most hedge funds pool money from several feeder funds into one master fund that does all the trading. That master is usually what files the 13F, which is why one filing can represent onshore, offshore, and tax-exempt capital at once. When you pull up a hedge fund's 13F, you see one filer and one list of holdings. What you usually do not see is that the single entity on that filing often sits at the top of a multi-layered structure pooling money from very different kinds of investors. That structure is called master-feeder, and it is the standard architecture of the hedge fund world. Understanding it answers a question that puzzles many people reading institutional filings: who, exactly, owns the money behind a 13F? How a master-feeder fund is built A master-feeder fund has two layers. At the bottom sit one or more feeder funds — the vehicles investors actually buy into. At the top sits a single master fund, which does all the actual investing. The feeders take in capital, then channel it up into the master, which holds the portfolio and executes every trade. The feeders themselves trade nothing; they simply own a proportional slice of the master. The reason for the split is tax and regulation, not strategy. A typical setup has two feeders: An onshore feeder — usually a U.S. limited partnership — for U.S. taxable investors, who want partnership tax treatment that passes gains and losses through to them. An offshore feeder — typically a corporation in the Cayman Islands or a similar jurisdiction — for non-U.S. investors and for U.S. tax-exempt institutions like pensions and endowments, which use the offshore vehicle to avoid a tax called UBTI (unrelated business taxable income) that leveraged trading can otherwise trigger. Both feeders invest into the same master fund, which is often itself a Cayman entity. The result is that wildly different investors — a U.S. individual, a sovereign wealth fund, a tax-exempt university endowment — can all back the same strategy through the vehicle that suits their tax situation, while the manager runs a single, unified portfolio at the master level. Why this matters for reading a 13F Here is the direct connection to the filings you track. The 13F is filed by whoever has investment discretion over the securities — in practice the management company or the master fund — not by the individual feeders. So a single 13F aggregates the entire pooled book: onshore money, offshore money, and tax-exempt money, all combined into one disclosure. The feeders almost never appear separately in 13F data, because they do not hold or trade the securities; the master does. This is why a manager's reported 13F value can be larger than any single fund vehicle you might read about — it is the master aggregating multiple feeders. When you study Third Point, Pershing Square, Elliott Investment Management, or Citadel, the holdings you see represent the consolidated master-level portfolio, drawn from a web of feeders and investor types that the filing flattens into one name. The structure is invisible in the holdings list but shapes whose capital is actually at work. What the structure does and doesn't change For the purpose of tracking smart money, the master-feeder structure is mostly plumbing — it does not change what the manager owns or why. But it has a few practical implications worth keeping in mind. It explains why you cannot easily separate a fund's domestic from its international backers in a 13F; the master blends them. It is part of why hedge funds can accept tax-exempt institutional money that mutual funds court differently. And it is a reminder that the legal entity named on a filing is a wrapper around pooled capital, not a single investor with a single tax situation. It also distinguishes hedge funds from other 13F filers. A traditional index complex like BlackRock's passive funds is organized as registered funds with their own disclosure regime, not as offshore master-feeder hedge vehicles. Recognizing the structure behind a filer is part of reading the taxonomy of institutional money correctly — knowing whether you are looking at a pooled hedge fund vehicle, a registered mutual fund, or an index manager tells you a lot about how the capital behaves before you even read the holdings. FAQ What is a master-feeder fund? A two-layer hedge fund structure in which one or more feeder funds collect investor capital and channel it into a single master fund that holds the portfolio and executes all trades. The feeders own proportional stakes in the master but trade nothing themselves. Why do hedge funds use master-feeder structures? Mainly for tax and regulatory efficiency. It lets U.S. taxable investors, non-U.S. investors, and U.S. tax-exempt institutions each invest through the vehicle that suits their tax situation, while the manager runs one unified portfolio at the master level. What is the difference between an onshore and offshore feeder? The onshore feeder is usually a U.S. limited partnership for U.S. taxable investors. The offshore feeder is typically a Cayman or similar corporation for non-U.S. investors and U.S. tax-exempt institutions seeking to avoid UBTI from leveraged trading. Which entity files the 13F in a master-feeder structure? The party with investment discretion — generally the management company or the master fund — files the 13F. The individual feeder funds do not, because they hold interests in the master rather than the underlying securities. Why can a fund's 13F be larger than a single fund vehicle? Because the 13F reflects the master fund, which aggregates capital from multiple feeders. The combined onshore, offshore, and tax-exempt money all rolls up into one portfolio and one disclosure. Does the master-feeder structure change what a fund owns? No. It is a legal and tax wrapper around pooled capital. It determines how investors access the strategy and how the money is taxed, but the master-level holdings — what the manager actually buys and sells — are unchanged by it. ## FAQ ### What is a master-feeder fund? A two-layer hedge fund structure in which one or more feeder funds collect investor capital and channel it into a single master fund that holds the portfolio and executes all trades. The feeders own proportional stakes in the master but trade nothing themselves. ### Why do hedge funds use master-feeder structures? Mainly for tax and regulatory efficiency. It lets U.S. taxable investors, non-U.S. investors, and U.S. tax-exempt institutions each invest through the vehicle that suits their tax situation, while the manager runs one unified portfolio at the master level. ### What is the difference between an onshore and offshore feeder? The onshore feeder is usually a U.S. limited partnership for U.S. taxable investors. The offshore feeder is typically a Cayman or similar corporation for non-U.S. investors and U.S. tax-exempt institutions seeking to avoid UBTI from leveraged trading. ### Which entity files the 13F in a master-feeder structure? The party with investment discretion, generally the management company or the master fund, files the 13F. The individual feeder funds do not, because they hold interests in the master rather than the underlying securities. ### Why can a fund's 13F be larger than a single fund vehicle? Because the 13F reflects the master fund, which aggregates capital from multiple feeders. The combined onshore, offshore, and tax-exempt money all rolls up into one portfolio and one disclosure. ### Does the master-feeder structure change what a fund owns? No. It is a legal and tax wrapper around pooled capital. It determines how investors access the strategy and how the money is taxed, but the master-level holdings, what the manager actually buys and sells, are unchanged by it. --- Source: 13F Insight — https://13finsight.com/learn/master-feeder-funds-structure-behind-a-13f-filer Author: Sarah Mitchell — https://13finsight.com/authors/sarah-mitchell Last updated: 2026-06-01T18:53:13.250Z