Only 2% of small businesses are listed for sale at any given moment. According to the IESE 2024 International Search Fund Study, covering 320 funds across 40 countries, the other 98% belong to owners who haven't decided to sell. Proprietary deal flow is the practice of reaching that market before any broker gets involved.
For search fund operators, mastering proprietary sourcing isn't optional. It's the job.
The funnel math first
Understand the arithmetic before you build a strategy. It's humbling. It's real.
Stanford's Search Fund Best Practices research documented a representative first-year campaign by a single searcher: 3,404 initial contacts produced 256 responses, 124 positive follow-ups, 25 in-person meetings, 16 pricing conversations, and 4 LOIs submitted. One deal closed.
The IESE 2024 study lands almost exactly the same numbers. Average searchers explored more than 3,000 businesses, held 159 personal conversations with owners, signed approximately 4 LOIs, and closed 1 deal. End-to-end conversion: roughly 0.03%.
That number isn't a discouragement. It's a design constraint. Searchers who understand the math build systems. Searchers who don't keep getting surprised. 37% of funded search funds never acquire a company. The funnel math explains a large part of why.
Why proprietary beats brokered
Three advantages compound: lower prices, less competition, stronger seller relationships.
Research cited by ExitRadar finds that lower-middle-market companies sourced proprietarily trade at median acquisition multiples approximately 15% lower than comparable brokered deals. Stanford data shows top-quartile search fund performers paid a median 4.5x EBITDA versus 4.8x for the bottom three quartiles, while buying larger, faster-growing, and more profitable businesses.
The mechanism is simple. In a brokered process, multiple buyers are competing in parallel. The seller's attorney has optimized the CIM to maximize price. The timeline is set by the broker, not the buyer. You are a number in a process.
In a proprietary deal, you are often the only buyer in the conversation. No competitive auction. No inflated pricing. The seller sets the pace because they trust the relationship.
For search fund operators specifically, that relationship quality matters beyond price. Your core pitch is that you are a dedicated operator who will take care of employees, honor the seller's legacy, and run the business they built. That pitch lands when the seller knows you personally. Stanford's Best Practices research recommends allocating 80% of search time to proprietary and industry-driven sourcing, 20% to brokered deals.
Four channels that produce real deal flow
Effective searchers run all four simultaneously. Each has a distinct conversion profile.
Direct mail. Physical mail to owners aged 55 and older generates 3-5% response rates, higher than email, because so few buyers use this channel. The perceived effort signals seriousness. A letter that says you're an entrepreneur looking to buy and operate a business in manufacturing reads differently than an automated email blast. Target owners by SIC code, geography, and estimated revenue. Plan for 10-20 pieces per week toward your highest-priority targets. Direct mail is slow and unsexy. It works.
Cold calling. Generates 5-8% of calls into meaningful conversations, the highest response rate of any channel, and the least used because most searchers hate rejection. The most effective approach is indirect: ask whether the owner knows anyone who might be considering retirement in their industry. Asking about others reduces defensiveness. Owners who say they've been thinking about it themselves are worth scheduling. Target 20-30 calls per day during active sourcing. Build the muscle by making calls before you do anything else each morning.
Email and LinkedIn. Email achieves 2-5% response rates at scale. LinkedIn Sales Navigator lets you filter by industry, company size, owner title, years in current position, and geography. Personalized outreach referencing something specific about the target business outperforms generic templates significantly. Personalized InMails see 10-20% response rates. The cadence: connect, add value, make the ask, over 2-4 weeks. Don't rush it.
Referral networks. CPAs, business attorneys, wealth advisors, commercial bankers, and retirement planners counsel business owners who are thinking about succession. These professionals know before any listing goes live. Build relationships with two to three of these advisors per week over coffee or a brief call. This channel has lower volume but the highest signal quality. A referral from a seller's trusted CPA means you walk into that conversation as a validated buyer, not a cold contact. IESE 2024 data shows advisor referrals account for 15-25% of typical deal flow for funded searchers.
Channel mix from the IESE 2024 data: direct outreach (35-45%), broker network (25-35%), advisor referrals (15-25%), buy-side partners (10-20%).
CRM discipline is non-negotiable
At 3,000 contacts across 18-24 months, deals get lost without a system.
Affinity is the institutional standard, built for relationship tracking at scale. Folio is purpose-built for search fund operators. Salesforce or HubSpot work if you already know them. The platform matters less than the habit. Log every call, email, and meeting within 24 hours. Tag by industry, owner age estimate, revenue range, and proprietary versus brokered source. Track conversion rates by channel and source.
Investor reporting during the search phase depends on this data. Monthly letters to your investors should include pipeline metrics: contacts initiated, conversations active, qualified opportunities, LOIs in progress, and deal stage by source. Investors who backed you need to see a functioning machine, not a narrative. For more on how searchers structure the full process, see our guide to search fund deal sourcing.
Exit signals narrow the target list
Not every business owner aged 58 wants to sell. Owners showing exit signals are different. Recent hires of a general manager, a job posting for a controller, attendance at an industry succession conference, a health event. These signals narrow the field dramatically. Targeting the 50 companies that actually matter beats contacting 2,950 that never would have sold.
The economics of better screening are stark. One month saved in the search is worth more than $15,000 in search capital. One deal sourced proprietarily at 15% lower multiples on a $5M acquisition represents $750,000 in value creation before the operating improvement plan even starts.
What separates closers from searchers who quit
A searcher who sends 50 emails, makes 10 calls, and attends two industry events per month will not close in 18 months. A searcher who averages 200-500 outbound emails per month, 20-40 calls, and builds 25-35 referral relationships across 12 months will build a pipeline that produces real qualified conversations at the pace the funnel math requires.
The deal flow gap between top-quartile and bottom-quartile search fund performers is not intelligence. It is volume and discipline applied to the right targets, tracked in a CRM, reported monthly to investors with specifics, and sustained across a 20-month search window where most people would have stopped.
PGC's acquisition model starts with direct relationship sourcing for exactly this reason. The best operators are building relationships with owners two to three years before those owners decide to sell. When those owners are ready, there is no auction, no CIM, no broker commission, and no competing bid.
Build the system before you need it. Start with referral relationships, add outreach at volume, track everything. The searchers who close aren't smarter than the ones who don't. They're more consistent, more organized, and more comfortable being the only buyer in a conversation that might not go anywhere for six months. That patience, applied to the right system, turns 3,000 contacts into one very good acquisition.
Frequently Asked Questions
What percentage of small businesses are listed for sale at any given time?
Only 2% of small businesses are listed for sale at any given moment, according to the IESE 2024 International Search Fund Study. The other 98% belong to owners who have not decided to sell. Proprietary deal flow is the practice of reaching that unlisted market before any broker gets involved.
How many businesses does a typical searcher contact before closing one deal?
Stanford and IESE data show average searchers explored more than 3,000 businesses, held roughly 159 personal conversations with owners, signed approximately 4 letters of intent, and closed 1 deal. The end-to-end conversion rate is roughly 0.03%. That is not a discouragement. It is a design constraint that determines the volume and system a searcher must build.
What channel mix do funded searchers use for deal sourcing?
IESE 2024 data shows direct outreach accounts for 35 to 45% of deal flow, broker networks 25 to 35%, advisor referrals 15 to 25%, and buy-side partners 10 to 20%. Advisor referrals through CPAs, attorneys, and wealth advisors carry the highest signal quality because a referral from a seller's trusted advisor means you enter the conversation as a validated buyer.
What advantage does proprietary sourcing provide on acquisition price?
Research cited in the article finds that lower-middle-market companies sourced proprietarily trade at median acquisition multiples approximately 15% lower than comparable brokered deals. In a proprietary deal, the buyer is often the only person in the conversation, which removes the competitive auction dynamic and inflated pricing that a brokered process produces.
