Delaware Series LLCs: A Scalable Structure for SPV Investing

By Mark Esserman, Lauren Figura

If you’re a fund manager building special purpose vehicles (or “SPVs”) for deal-by-deal investments, you’ve probably experienced the overhead: each raise requires a new entity, new formation documents, a new EIN, and a new operating agreement drafted from scratch or hastily adapted from the last one. It works, but it doesn’t scale well, and the legal costs add up fast when you’re launching multiple vehicles a year.

Delaware’s series LLC statute offers an alternative architecture. Rather than forming a standalone LLC for each new investment, Delaware law allows you to form a single “master” LLC and establish a new “series” (or “cell”) under it for each deal. Each cell has its own assets, its own liabilities, its own investors, and its own economics, but they all live under one umbrella. Think of it like a holding company, except the liability walls between each series are built into the statute itself, rather than relying on corporate separateness doctrine.

This post walks you through how the structure works, the key decisions you’ll face in setting it up, and the practical considerations that don’t always make it into the statute but matter when you’re actually running money through it.

The Basic Architecture

The structure has three layers. Sitting at the top is the management company, which is the entity that serves as manager and makes the investment decisions. Below the management company is the master series LLC, a Delaware limited liability company that exists solely to house and sit above the individual series. And below that are the series themselves, each of which functions as an independent SPV.

Here’s how it maps:

The management company (typically a Texas or Delaware LLC owned by the fund manager) is named as the Manager of the master and of each series. It provides advisory services, makes investment decisions, and receives compensation in the form of carried interest (through a carry designee entity) and management or expense fees.

The master LLC is formed in Delaware and serves as the umbrella entity. It holds no assets, conducts no operations, and has no investors. Its certificate of formation includes a notice of limitation of liabilities under the Delaware Limited Liability Company Act, which is the statutory provision that creates the liability shields between series. The master’s operating agreement is thin. It establishes governance, names the Manager, and provides the framework for creating new series.

Each series (or “cell”) is where the action happens. Each series has its own operating agreement, its own members, its own capital commitments, its own waterfall, and its own investment. Investors subscribe to units in the series, not in the master. Capital flows into the series bank account, gets deployed to the portfolio company, and distributions flow back out to the series’ members. From a tax perspective, each series is generally treated as a separate entity for federal income tax purposes, filing its own partnership return (Form 1065) and issuing its own K-1s to its members.

Registered vs. Protected: A Distinction That Matters

Delaware offers two flavors of series: “protected series” and “registered series.” Both types provide the core liability shields — the debts of one series cannot be enforced against the assets of another — and both can contract, hold property, grant liens, and sue and be sued in their own name.

The difference lies in how they exist on the public record. A protected series is created internally through the master’s operating agreement and the master’s records. It has no filing with the Delaware Secretary of State (SOS), no certificate of formation on the state records, and no ability to obtain a certificate of good standing.

A registered series files a Certificate of Registered Series with the Delaware Secretary of State. It can also obtain a certificate of good standing from the Delaware SOS, something banks, counterparties, and lenders routinely request. The tradeoff is a filing fee with the Delaware SOS for each Certificate of Registered Series and a modest annual tax, neither of which applies to protected series.

For SPV investing, using registered series is generally the right call. When the cell needs to open a bank account, prove its existence to a counterparty, or interact with third parties who are unfamiliar with the series LLC structure, having a state filing and the ability to produce a good standing certificate makes those interactions significantly cleaner. For a fund manager launching multiple SPVs a year, the incremental cost per series is modest and worthwhile. 

The Naming Requirement

One mechanical requirement that catches people off guard: under Section 18-218(e), the name of a registered series must begin with the name of the LLC. So, if your master is “ABC Ventures Master Series LLC,” the name of your first series could be “ABC Ventures Master Series LLC – S1 Portfolio Co SPV.”

This means the master’s name should be chosen with series naming in mind. A short master name keeps the series names manageable. A long master name creates unwieldy series names that are awkward on signature blocks, bank accounts, and state filings. Plan accordingly.

The Document Suite

For the initial platform setup (master plus first series), the document suite typically includes:

The master LLC agreement governs the umbrella entity. It names the Manager, establishes that the master is a shell, provides for the creation of series, includes the conflict-of-documents provision (the series agreement controls if there’s an inconsistency), and includes standard governance, indemnification, and boilerplate provisions.

The series operating agreement is the primary governing document for each cell. This is where the economics and bespoke provisions live: the waterfall, the expense fee or management fee, the carried interest percentage, the capital contribution mechanics, the distribution triggers, the transfer restrictions, the drag-along rights, and the dissolution triggers. Each new deal gets its own series operating agreement tailored to the investment. Generally, these can be recycled for each new deal, with only targeted, deal-specific updates. This can help drive down legal costs as the process is more efficient than starting from scratch.

The subscription agreement is signed by each investor and includes the investor’s representations and warranties, the accredited investor certification, the risk factors, jurisdictional legends, and a target investment summary. The subscription agreement is exhibit-heavy but largely standardized across deals, with the risk factors and investment summary customized for each portfolio company.

The manager consent is a written consent executed by the management company authorizing the formation of the master and the establishment of each new series. It covers the Certificate of Formation, the master LLC agreement, the Certificate of Registered Series, the series documents, the offering terms, and the regulatory filings.

The term sheet summarizes the key terms for each series and is typically the first document circulated to prospective investors.

Once the platform is built, launching a new series becomes a light lift: file a Certificate of Registered Series, draft the series operating agreement and subscription agreement from the templates (plugging in the new deal’s economics and risk factors), update the term sheet, execute a consent, obtain an EIN, open a bank account, and onboard investors. The master LLC agreement, the master’s Certificate of Formation, and the platform architecture are already in place.

Liability Segregation: Belt and Suspenders

The statutory liability shields are only as strong as the practices that support them. The operating agreement should include provisions that reinforce the statutory protections:

A series liability segregation provision explicitly states that the debts of the series are enforceable only against the assets of that series, and vice versa. This mirrors the statutory language and puts investors on notice.

A separate books and records provision requires the Manager to maintain distinct records for each series, accounting for assets and obligations separately from the master and any other series.

A maintenance of separate existence provision requires the series to do all things necessary to maintain its separateness: don’t commingle assets, don’t share bank accounts, identify assets separately, and account for liabilities independently.

Practical Administration: Keeping the Platform Organized

The statutory structure does a lot of the heavy lifting, but running several series creates its own administrative load. The master itself owes Delaware’s annual tax to keep good standing for the entire platform, and each series also needs its own bank account. The liability shield only holds up in practice if that series’ money actually moves through a distinct account rather than commingling with the master’s or another series’ funds. None of this is complicated on its own, but once a manager is running five or ten series, it’s easy for a late tax payment or money crossing between series’ bank accounts to fall through the cracks.

The fix is usually procedural: a simple master tracking log, kept alongside the document suite. Building that tracker at the same time as the first series, rather than after the fifth or sixth, makes it far easier for whoever manages the back office to keep the platform current without relying on institutional memory.

Regulatory Considerations

The management company (the entity serving as Manager and making investment decisions for the series) is almost certainly an investment adviser under the Advisers Act. Most emerging managers at this stage file as an Exempt Reporting Adviser (ERA) under Section 203(l) (venture capital fund adviser exemption) or Section 203(m) (private fund adviser exemption for managers with under $150M in assets under management). The ERA filing is done once, by the adviser entity, not per series.

What changes with each new series is Item 7.B of the Form ADV, which is the private fund reporting section. Each series that pools investor capital and makes investments is a separate “private fund” that needs to be listed in Item 7.B. When you launch a new cell, you amend the Form ADV to add it. The master itself is not a private fund — it doesn’t pool capital or issue securities.

On the securities side, each series offering is typically conducted under Rule 506(b) of Regulation D (no general solicitation, accredited investors, self-certification) or Rule 506(c) (general solicitation permitted, but verification of accredited status required). For most SPV managers raising from their existing network, 506(b) is the right choice. Each series files its own Form D with the Securities and Exchange Commission (SEC) within 15 days of the first sale, and state blue sky notice filings are made based on the states where investors are located.

An Alternative: The Series Limited Partnership

Delaware’s series concept isn’t unique to just LLCs. A parallel regime under the Delaware Revised Uniform Limited Partnership Act lets you form a master limited partnership and establish a series for each deal, with the same inter-series liability shields, and it’s the structure some of the largest SPV platforms, including AngelList, use. The choice between the two is narrower than it looks: federal tax (partnership pass-through either way), Delaware fees, and the Investment Company Act and Advisers Act exemptions are all form-neutral. What tips toward the limited partnership (LP) is institutional familiarity and a cleaner general partner (GP)/LP governance split; the LP is the decades-old default for pooled vehicles, and its general-partner framework maps neatly onto SPV management and carried interest. The series LLC is generally simpler and cheaper to paper and administer, which usually makes it the pragmatic choice for a boutique manager’s own platform; the series LP earns its added complexity mainly when you expect to raise repeatedly from institutional limited partners who already live in the LP world.

When This Structure Makes Sense

The series LLC is not the right vehicle for every fund. It’s optimized for managers who are running multiple deal-by-deal SPVs and want a standardized, scalable platform. The upfront cost of building the master and the initial document suite is higher than forming a single standalone SPV, but the marginal cost of each additional series is significantly lower. If you’re launching three or more SPVs a year, the economics tip decisively in favor of the series structure.

It also works well for managers who want clean liability segregation between deals without the administrative burden of maintaining dozens of standalone LLCs, each with its own state filings, annual reports, and registered agents.

If you’re running a blind-pool fund (where investors commit capital upfront and the manager decides what to invest in), a traditional limited partnership is still the standard vehicle. The series LLC is purpose-built for the deal-by-deal model where each investment has its own investor base, its own economics, and its own timeline.

Conclusion

The Delaware series LLC gives SPV managers a structure that is both legally robust and operationally efficient. Build the platform once (i.e., the master, the templates, the document suite), and each new deal is a matter of filing one certificate, tailoring one set of documents, and onboarding investors. The liability walls are statutory, and the structure scales cleanly from one deal to fifty.

The key is getting the foundation right. The master’s certificate of formation, the liability limitation notice, the bespoke operating agreement architecture, and the series-level provisions for separate existence and liability segregation must be set up correctly at the outset. Once the platform is in place, the per-deal execution becomes routine.

About the Author(s)

Mark Esserman

Prior to joining Vela Wood, Mark worked as an associate at Haynes and Boone as an investment funds attorney in their Investment Management practice group. During his time at Haynes and Boone, Mark worked with investment managers to structure, launch, […]

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Lauren Figura

Lauren Figura is a Venture Legal Assistant at Vela Wood. Her role includes managing Secretary of State filings, supporting entity formations and dissolutions, organizing and maintaining documentation, and supporting VW Senior Attorney Mattison Raiford.