How to Build a Co-Investment Network: Strategies for Dealmaking with Other Investors
Building a co-investment network allows investors to pool capital, share deal flow, and reduce risk by collaborating on high-conviction opportunities. By systematically cultivating relationships with family offices, high-net-worth individuals, and institutional LPs, you can source better deals and close transactions that would otherwise be out of reach.
Executive Summary / Key Results
A well-structured co-investment network transforms deal sourcing from a solo scavenger hunt into a repeatable, scalable system. The key results include access to larger and more attractive investment opportunities, faster capital commitments through pre-vetted relationships, and improved portfolio diversification by co-investing alongside experienced partners. For emerging fund managers, a robust co-investor network is often the difference between winning a competitive deal and watching it slip away.
Background / Challenge
Most emerging fund managers and independent sponsors possess strong deal-sourcing and underwriting skills. They can identify promising startups, negotiate terms, and manage exits. Yet a critical gap persists: the capital required to fund a deal. As noted in research on self-funded searchers, "What stops them isn't diligence capability — it's the $200K–$500K equity check. That equity problem is a network problem, and it's solvable". Without a ready pool of co-investors, many viable transactions never close.
The challenge is compounded by limited LP attention spans. High-net-worth individuals and family offices receive dozens of investment memos each week. A generic pitch deck stamped with "co-investment opportunity" rarely gets a second look. The solution lies in building a deliberate, systematic co-investment network that treats each relationship as a long-term partnership, not a one-off transaction.
Solution / Approach
A systematic co-investment network relies on three pillars: curated deal flow, professional-grade documentation, and consistent communication.
Curate Opportunities, Don't Mass-Market Them
The cardinal rule of co-investor relationship management is to "curate opportunities. Do not send every deal to every LP. Offer co-investments that are especially relevant to a particular investor’s interests, risk profile, or portfolio". This targeted approach demonstrates that you understand the LP's investment thesis and respect their time. For example, a health-tech-focused LP should only receive pitches for health-tech deals — no software-as-a-service, no consumer goods.
Frame It as Access, Not a Sales Pitch
Co-investments should be positioned as a privilege for select LPs, not a desperate capital call. "Frame it as access, not a sales pitch. Position co-investments as a way for LPs to increase exposure to deals where you already have high conviction". When an LP receives an exclusive invitation, they perceive it as an opportunity to partner with a manager who has already done the heavy lifting.
Prepare a Standalone Co-Investment Memo
A flimsy pitch deck won't cut it. Before sending any materials, prepare a professional standalone memo that includes: investment thesis, company overview, financial model summary, deal terms, SPV economics, risk factors, and exit analysis. The memo should be eight to twelve pages long, cleanly formatted, and self-contained. This document replaces the generic fund deck and signals a high level of professionalism.
Implementation
Building a co-investment network is an operating function, not a fundraising event. It requires consistent effort across several parallel tracks:
Step 1: Identify and Segment Potential Co-Investors
Start by mapping your existing network. Who are the family offices, high-net-worth individuals, and institutional LPs you already know? Categorize them by sector preference, check size, decision speed, and risk appetite. Use a co-investor CRM to track every interaction: who they are, what sectors they like, what check sizes they write, how fast they move, who their decision-makers are, and what they passed on and why. This database becomes your most valuable asset alongside your track record.
Step 2: Establish Legal and Administrative Infrastructure
Most co-investments flow through Special Purpose Vehicles (SPVs). To make the process smooth, prepare SPV legal templates, partner with an administration partner, and set up a communication cadence. The SPV structure consolidates multiple co-investors into a single line on the company’s cap table, reducing administrative burden for the portfolio company.
Step 3: Build a Communication Cadence
Silence kills co-investor relationships. Establish a schedule: quarterly updates to all co-investors (even when there's nothing exciting to report), and monthly updates during active value creation phases. These updates keep LPs engaged and informed, making them more likely to re-up on the next deal. Transparency is critical: share both wins and setbacks.
Step 4: Execute Deal-by-Deal Investments
For emerging managers, a deal-by-deal structure is often the right choice. Under this model, each acquisition is its own entity. LPs review individual deal memos and commit capital to a specific acquisition — no blind pool required. This approach reduces LP risk and builds trust over time. A typical timeline might look like: Week 1-2 for deal identification, Week 4 for LOI signing with 30-day exclusivity, and subsequent weeks for due diligence and closing.
Results with Specific Metrics
Managers who implement a systematic co-investment network can measure tangible outcomes:
- Close rate improvement: By curating opportunities, managers see higher acceptance rates — some report closing 2-3x more deals than when using a shotgun approach.
- Speed of capital commitments: Pre-vetted LPs often commit within 48 hours of receiving a targeted memo, compared to weeks of back-and-forth with cold prospects.
- Portfolio diversification: Co-investing with LPs who have complementary expertise (e.g., a biotech specialist on a pharma deal) reduces blind spots and improves risk-adjusted returns.
Sample Metrics Table
| Metric | Before Network | After Network | Improvement |
|---|---|---|---|
| Deals closed per year | 2 | 6 | 200% |
| Average time to close | 120 days | 45 days | 63% faster |
| LP retention rate | 40% | 85% | 112% increase |
These figures are illustrative but reflect industry trends reported by practitioners.
Key Takeaways
- Build relationships before you need them. A co-investment network requires ongoing nurturing — start with a CRM and regular touchpoints.
- Quality over quantity. Curate each deal for the right LPs, and frame invitations as access to exclusive opportunities.
- Transparency builds trust. Share your own capital commitment and update LPs consistently, even during quiet periods.
- Leverage SPVs for efficiency. Consolidate multiple co-investors into a single entity to minimize back-office burden.
- Combine with rigorous due diligence. A network amplifies good judgment but doesn't replace it. Pair your co-investment strategy with best practices from Investment Strategies & Due Diligence: A Complete Guide and How to Conduct Due Diligence for Startup Investments: A Step-by-Step Guide.
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