A master fund is the central investment entity in a master-feeder structure. It holds all of the portfolio’s assets, executes the investment strategy, and is where the general partner actually manages capital. Feeder funds sit above it, collecting capital from different investor groups and channeling it down into the master fund as a single pool.
The Master Fund’s Role
Think of the master fund as the engine. It is where investments are made, positions are managed, and exits are executed. The feeders are entry ramps that route different types of investors into that engine without forcing them into a single tax or regulatory structure.
The GP’s investment team interacts with the master fund. Portfolio monitoring, valuation, risk management, and reporting on underlying holdings all happen at this level. The feeders handle investor-level concerns: capital calls, distributions, K-1s (for the domestic feeder), and LP communications.
Why the Structure Exists
A US pension fund and a Cayman-domiciled family office cannot efficiently co-invest through the same legal entity. The pension fund needs UBTI protection. The offshore investor needs to avoid certain US tax filing obligations. Rather than running two separate portfolios, the manager creates one master fund and routes each investor type through an appropriate feeder.
This is most common in hedge funds, where the master fund trades a liquid portfolio and the feeder structure is well understood by service providers and regulators. In private equity and venture capital, parallel fund structures are more prevalent because investors often prefer direct ownership of underlying portfolio companies rather than indirect exposure through a master entity.
Domicile and Structure
Master funds are frequently domiciled in the Cayman Islands, which offers tax neutrality and a mature legal framework for fund vehicles. When the investor base is exclusively or predominantly US-based, a Delaware master fund may be sufficient. The choice of fund domicile depends on where the investors are, what tax treaties apply, and what the fund administrator and auditor can support efficiently.
The master fund is typically structured as a limited partnership or an exempted company. Its limited partnership agreement (or equivalent governing document) defines the investment mandate, fee arrangements, and GP authority. The feeder funds subscribe for limited partner interests in the master fund, effectively becoming its LPs.
Economics
Management fees and carried interest are typically charged at the feeder level, not the master fund level. This avoids double-layering economics and ensures each investor group pays the correct rate based on their feeder’s terms. Some structures charge fees at the master level and pass them through proportionally, but feeder-level charging is more common because it accommodates different fee arrangements across investor types.
Fund administration costs increase with a master-feeder structure because the administrator maintains books at both levels. The master fund requires its own audit, tax filings, and NAV calculations in addition to whatever each feeder requires. For managers considering this structure during fund formation, the added cost is justified only when the LP base is diverse enough to require it.
Frequently Asked Questions
What is the difference between a master fund and a feeder fund?
The master fund is the entity that holds all portfolio assets and executes trades or investments. Feeder funds are the entities that collect capital from different investor groups and invest it into the master fund. The GP manages the master fund; the feeders are structural wrappers that accommodate different tax and regulatory needs.
Where are master funds typically domiciled?
Master funds are most commonly domiciled in the Cayman Islands, particularly for hedge fund structures with international investor bases. The Cayman Islands offer tax neutrality, a well-developed legal framework for fund structures, and regulatory familiarity among global institutional investors. Some master funds are domiciled in Delaware when the investor base is primarily US-based.
Can a master fund have only one feeder?
Technically yes, but it defeats the purpose. The master-feeder structure exists to accommodate multiple investor types with different tax or regulatory needs. A single-feeder master fund adds cost and complexity without structural benefit. Most managers with only one investor type use a standalone fund instead.
