Comparison
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SPV vs Main Fund: Key Differences Explained
Quick Answer
An SPV (Special Purpose Vehicle) is a one-off investment entity created to make a single investment, with LPs investing deal-by-deal. A main fund is a pooled, multi-investment vehicle where LPs commit capital upfront and the GP deploys it across many companies over multiple years. SPVs offer deal-specific access; main funds provide diversified, managed exposure to a GP's strategy.
What is SPV?
A Special Purpose Vehicle (SPV) is a legal entity — typically an LLC — created for the sole purpose of investing in a single company. LPs decide whether to invest deal-by-deal: if they like the specific opportunity, they join the SPV; if not, they pass. SPVs are commonly used by angel syndicates (AngelList, Republic), for follow-on investments alongside main funds, or when a GP spots an opportunity outside their fund's scope. The GP charges carry (10–20%) on the SPV's profits plus management fees (sometimes). SPVs democratize access to top deals — an individual investor can participate in a deal that would otherwise require a $10M minimum fund commitment. The downside: investors must evaluate each deal independently, and SPVs lack portfolio diversification.
What is Main Fund?
A main fund (or blind pool) is the traditional VC fund structure: LPs commit a set amount of capital upfront, and the GP has discretion to invest that capital across 20–40+ companies over 2–4 years. LPs trust the GP's judgment on specific deals — they're betting on the GP's strategy and track record, not individual companies. Main funds typically have a 10-year life (2–4 year investment period, 6–8 year harvest period). They provide diversification, professional management, and a known fee structure (2% management fee, 20% carry). Main funds are the vehicle for institutional LPs — endowments, pension funds, and family offices — who want systematic exposure to venture.
Key Differences
| Feature | SPV | Main Fund |
|---|---|---|
| Investment scope | Single company | Portfolio of 20–40+ companies |
| LP commitment | Deal-by-deal — optional each time | Upfront — full fund commitment |
| Diversification | None — single position | Full portfolio diversification |
| LP diligence | On each specific deal | On GP's strategy and track record |
| Management fee | Variable, sometimes none | 2% of AUM annually |
| LP minimum | Often $10K–$100K per deal | $250K–5M+ for institutional funds |
When Founders Choose SPV
- →An angel syndicate wants to co-invest in a deal alongside a VC
- →A GP wants to make a follow-on investment larger than their fund allocation
- →Individual investors want deal-specific access to a specific company
- →A founder wants to bring in specific investors beyond what their lead VC provides
When Founders Choose Main Fund
- →LPs want systematic, diversified exposure to a GP's strategy
- →A GP is building an institutional fund with long-term LP relationships
- →LPs prefer one annual K-1 and fund-level reporting over deal-by-deal tracking
Example Scenario
A VC firm has a $75M Fund III with a $2M position in a breakout Series B company. They believe the company will be a fund returner and want to invest more, but the main fund is fully committed. They run a $5M SPV for select LPs who want concentrated exposure to the specific deal. LPs who join the SPV know exactly what they're investing in; they accept higher concentration risk for direct access. The SPV lets the GP capture more upside on their best conviction bet without violating fund agreements.
Common Mistakes
- 1Treating SPVs as a substitute for a main fund — SPVs lack diversification and require deal-by-deal due diligence from LPs
- 2Not understanding the tax treatment of SPVs — each is a separate entity with its own K-1
- 3Launching too many SPVs without building toward a main fund — a track record of SPV wins is how you raise a real fund
- 4Forgetting SPV carry is deal-specific — you can't net losses against gains across different SPVs
Which Matters More for Early-Stage Startups?
Main funds are the institutional standard — they provide structure, diversification, and a long-term GP-LP relationship. SPVs are powerful tools for deal-specific access and follow-on investment. The best GPs use both: the main fund for their core portfolio strategy and SPVs for outsized follow-ons in their best companies.
Related Terms
Frequently Asked Questions
What is SPV?
A Special Purpose Vehicle (SPV) is a legal entity — typically an LLC — created for the sole purpose of investing in a single company. LPs decide whether to invest deal-by-deal: if they like the specific opportunity, they join the SPV; if not, they pass. SPVs are commonly used by angel syndicates (AngelList, Republic), for follow-on investments alongside main funds, or when a GP spots an opportunity outside their fund's scope. The GP charges carry (10–20%) on the SPV's profits plus management fees (sometimes). SPVs democratize access to top deals — an individual investor can participate in a deal that would otherwise require a $10M minimum fund commitment. The downside: investors must evaluate each deal independently, and SPVs lack portfolio diversification.
What is Main Fund?
A main fund (or blind pool) is the traditional VC fund structure: LPs commit a set amount of capital upfront, and the GP has discretion to invest that capital across 20–40+ companies over 2–4 years. LPs trust the GP's judgment on specific deals — they're betting on the GP's strategy and track record, not individual companies. Main funds typically have a 10-year life (2–4 year investment period, 6–8 year harvest period). They provide diversification, professional management, and a known fee structure (2% management fee, 20% carry). Main funds are the vehicle for institutional LPs — endowments, pension funds, and family offices — who want systematic exposure to venture.
Which matters more: SPV or Main Fund?
Main funds are the institutional standard — they provide structure, diversification, and a long-term GP-LP relationship. SPVs are powerful tools for deal-specific access and follow-on investment. The best GPs use both: the main fund for their core portfolio strategy and SPVs for outsized follow-ons in their best companies.
When would you encounter SPV vs Main Fund?
A VC firm has a $75M Fund III with a $2M position in a breakout Series B company. They believe the company will be a fund returner and want to invest more, but the main fund is fully committed. They run a $5M SPV for select LPs who want concentrated exposure to the specific deal. LPs who join the SPV know exactly what they're investing in; they accept higher concentration risk for direct access. The SPV lets the GP capture more upside on their best conviction bet without violating fund agreements.
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