Search fund investing is a form of entrepreneurship through acquisition (ETA): investors back an entrepreneur, the searcher, who finds, buys, and personally runs a single established small business as its CEO. Capital arrives in two stages. A small search round funds the hunt for a company, and a larger acquisition round funds the specific purchase once a target is under letter of intent.
The model was created at Stanford Graduate School of Business in 1984 and now spans hundreds of completed acquisitions across North America, Europe, and Latin America. Search fund stakes are private securities open only to accredited investors, and the targets are typically profitable companies with $5 million to $30 million of enterprise value in unglamorous, cash-generative industries. In the search phase, investors underwrite a person before there is a business to underwrite at all.
The one-pager
- The short version: Investors first back a searcher’s hunt for a company, then fund the specific acquisition once a target is signed, and the searcher runs it as CEO.
- The numbers: Aggregate US and Canada returns since 1984 run about 33.9% IRR on a 4.75x ROI, dollar-weighted; the median acquisition is roughly $16 million of enterprise value at 6.2x EBITDA (Stanford GSB 2026 Search Fund Study).
- Who’s investing: Accredited investors only, historically MBA alumni and family offices, now widening through conferences, online communities, and deal-by-deal co-investment through CapitalPad.
- The access: Back a search up front for a step-up on entry, or invest deal by deal after the LOI once a specific company is on the table.
- The catch: The aggregate is outlier-driven; about 26% of acquired companies return a loss, and the search phase itself can be a total loss if the searcher never closes.
The search fund model: entrepreneurship through acquisition
A search fund is an investment vehicle in which an entrepreneur, called the searcher or operator, raises capital to find, acquire, and run a single small-to-medium-sized business. The operator becomes the full-time CEO of the company they buy, with the goal of growing it and eventually exiting at a higher value. The broader strategy is known as entrepreneurship through acquisition, or ETA.
The model was developed at Stanford Graduate School of Business in 1984 by Professor H. Irving Grousbeck. Harvard Business School professors Richard Ruback and Royce Yudkoff later widened its reach through their MBA course and their book, the HBR Guide to Buying a Small Business. It has since spread to programs at Kellogg, Tuck, Darden, Columbia, MIT Sloan, Wharton, and IESE Business School in Barcelona, producing hundreds of completed acquisitions worldwide. Stanford GSB’s Search Fund Primer remains the standard introductory text for operators and investors alike.
Four features separate the model from anything else an alternative investor is likely to hold:
- It is acquisition entrepreneurship, not a startup. The operator buys a proven, cash-flow-positive business and steps in as CEO, so investor capital funds a purchase, not product development.
- It is a single-asset investment, one company instead of a fund’s portfolio, which concentrates both the upside and the risk.
- The operator and the CEO are the same person, an unusually tight alignment between the individual running the business and the investors who funded it. The operator typically holds 20% to 25% of the equity and earns carried interest tied to return thresholds.
- Capital is raised in two distinct stages with very different risk profiles, the concept that trips up most first-time investors and gets its own section below.
That single-person alignment is the model’s defining feature and its defining risk. You are buying the judgment of one operator, not a diversified team.
The businesses search funds buy
Search fund targets share a recognizable profile, and it is deliberately unglamorous.
| Characteristic | Typical range |
|---|---|
| Enterprise value | $5M to $30M |
| Annual revenue | $5M to $25M |
| EBITDA margins | 15% to 30% |
| Primary industries | B2B services, niche manufacturing, healthcare services, IT managed services, facilities management, HVAC, insurance, specialty distribution, commercial cleaning, pest control, waste management, landscaping, home services |
| Geographic scope | Primarily the US and Canada, with growing activity in Europe, Latin America (notably Brazil, Mexico, and Colombia), and other markets |
Source note: target-profile ranges are market conventions; the Stanford GSB 2026 study reports a median 2024-25 US and Canada acquisition of $16.0M enterprise value at a 6.2x EBITDA multiple, a 25% margin, and $2.5M of EBITDA.
These are boring, profitable, essential businesses, and that is the point. The model runs on predictable cash flow and stable customer relationships, not hypergrowth, and the profile sits inside lower middle market private equity, the broader segment these companies belong to. Operators source them through proprietary outreach, business brokers, intermediaries like Axial, and marketplaces like BizBuySell.
How a search fund raises capital: the two-stage model
The two-stage capital raise is the single most important thing a new investor has to understand, because the two stages are different investments with different risk, priced differently. The search stage is small, early, and a bet on a person. The acquisition stage is larger, later, and a bet on a specific company.
Stage one: funding the search
In the first stage the operator raises search capital, a small pool that funds a full-time hunt for a target.
| Search phase | Typical |
|---|---|
| Total capital raised | $400,000 to $600,000 |
| Number of investors | 10 to 20 |
| Check size per investor | $30,000 to $50,000 per unit |
| Time horizon | 18 to 24 months |
| Operator salary funded | $80,000 to $120,000 a year |
| Use of funds | Salary, travel, legal and accounting fees, deal-sourcing tools, conferences, overhead |
| What you’re backing | The operator, with no specific company yet |
| Key risk | Operator never closes; near-total loss of search capital |
Source note: search-phase conventions per the Stanford GSB and IESE search fund literature; the median US and Canada search raised about $550,000 from a median of 13 investors over roughly 20 months (Stanford GSB 2026 Search Fund Study).
During the search the operator is a full-time deal sourcer, typically screening 200 or more businesses, holding serious conversations with 30 to 50, and making offers on a handful before closing one. What a search-phase investor is buying, then, is a person: there is no company yet, only the operator’s ability to find and close a good one inside the window.
That makes this the riskiest point in the model. Across the full history, about 58% of concluded searches ended in an acquisition, so roughly 42% did not; for funds launched between 2021 and 2024 the rate fell to about 48%, leaving more than half of recent searchers short of a deal (Stanford GSB 2026 Search Fund Study, US and Canada). A failed search means a probable total loss on the Stage 1 investment.
The compensation for that risk is the equity step-up. Search-phase investors typically receive a 1.5x credit on their capital when the acquisition closes, so a $50,000 search investment converts to $75,000 of acquisition equity, a 50% bonus for bearing the blind-search risk. The step-up is the mechanism the market uses to price Stage 1 risk, and it is worked through in full in the legal-terms section below.
Stage two: funding the acquisition
Once the operator signs a letter of intent on a target, they raise acquisition capital, a much larger round and a fundamentally different decision.
| Acquisition phase | Typical |
|---|---|
| Total equity raised | $2 million to $10 million |
| Check size per investor | $100,000 to $500,000+ |
| Debt financing | A conventional bank loan and often a seller note; an SBA 7(a) loan on smaller self-funded deals |
| What you’re backing | A specific company with real financials |
| Key risk | The business underperforms after the acquisition |
The debt distinction matters. An SBA 7(a) loan caps at $5 million and can finance up to roughly 90% of a sub-$5 million purchase, which is why it anchors individual-buyer and self-funded ETA deals rather than the larger multi-investor funds, which lean on conventional acquisition debt and seller notes.
Here the investor is evaluating a real company with real financials, customers, and operating history, a far more familiar underwriting exercise than backing a blind search. Search-phase investors usually hold a right of first refusal to participate but are not obligated to; many invest more, some pass. New investors can join at this stage as well, though they do not receive the 1.5x step-up.
What the return data actually says
Search funds have one of the most thoroughly documented return histories in private markets, because Stanford GSB has tracked the US and Canada universe every two years since 1984 and IESE tracks the international one. That documentation is the asset class’s real distinction, more than any single headline multiple.
Across all US and Canada search funds since 1984, the aggregate return has been strong, and every figure below is a dollar-weighted pool statistic rather than a typical fund.
| Aggregate return, US and Canada since 1984 | Figure |
|---|---|
| Aggregate IRR | 33.9% |
| Aggregate ROI | 4.75x |
| Excluding funds that returned 10x or more | 2.8x ROI, 27% IRR |
| Fully exited funds | 39.3% IRR, 5.98x ROI |
| Public-market equivalent vs the S&P 500 | 2.88x |
| Acquired companies returning a loss | about 26% |
Source note: Stanford GSB 2026 Search Fund Study, dollar-weighted and pre-tax. These are pool figures lifted by a few outliers, not medians or expected outcomes.
Reading them correctly is the whole game. The aggregate is lifted by a handful of exceptional exits, which is why stripping out the 10x-plus funds cuts it by more than a third, and why headline IRR eased from the prior study’s 35.1% even as ROI rose from 4.5x (operators are holding companies longer). The counterweight is dispersion: with roughly a quarter of acquired companies returning a loss, picking the average outcome and picking a good outcome are different skills, which is the whole case for diversifying across deals rather than concentrating. The full record, labeled by universe and edition, is compiled in our search fund statistics report.
One reconciliation worth keeping straight: the international universe tracked by IESE shows a lower aggregate, about 18.1% IRR on 2.0x in its 2024 edition, but that reflects a young, largely unexited book rather than weaker searchers, since most international acquisitions closed only after 2020. The two universes are separate populations and are never blended into one global number.
Longer holds are also part of the arithmetic. A search fund acquisition is generally underwritten to a five-to-seven-year hold, and time works against IRR when it stretches; the mechanics of that are covered in the private equity holding period data.
Who can invest, and how access is widening
Search fund stakes are private placements issued under Regulation D of the Securities Act of 1933, unregistered with the SEC and open only to accredited investors. An individual qualifies by meeting at least one of three tests:
- Income: over $200,000 individually, or $300,000 jointly with a spouse, in each of the two most recent years, with the same expected this year.
- Net worth: over $1,000,000 individually or jointly, excluding a primary residence.
- Licenses: holding a FINRA Series 7, 65, or 82, regardless of income or net worth.
These thresholds are current as of 2026 and have not been indexed to inflation. Most offerings use Rule 506(b), which allows up to 35 non-accredited investors but bars general solicitation; some newer offerings use Rule 506(c), which permits public marketing but requires every investor to be verified as accredited.
Access used to be the binding constraint. Search fund investing was concentrated among a tight circle of Stanford GSB and Harvard alumni, former operators turned investors, and a few specialist family offices, and if you were not connected to someone inside it, the deal flow was invisible. That has loosened. Conferences have grown well beyond the MBA network, online communities like Searchfunder.com now share deal flow among accredited investors, dedicated co-investment groups aggregate opportunities for investors without operator relationships, and the model’s international expansion through IESE and across Latin America has widened the pool further. The asset class is still small and relationship-driven, but it is meaningfully more open than it was five years ago.
The legal structure and the terms that matter
A search fund’s legal structure is simpler than most institutional PE vehicles, with a few features specific to the model. Knowing them before you read your first term sheet saves confusion later.
Most search funds use a two-entity model. A search-phase entity, usually an LLC, raises and holds the initial search capital, with investors as members. A separate acquisition-phase entity, an LLC, LP, or C-corporation, is formed to buy the target and is what investors actually hold equity in at the acquisition stage. The search entity typically converts into or merges with the acquisition entity at close, and pass-through structures create K-1 reporting for investors.
The entity choice carries real tax weight. A C-corp can open the door to Qualified Small Business Stock treatment under Section 1202. For QSBS acquired after July 4, 2025, the 2025 tax act raised the per-issuer exclusion to the greater of $15 million or 10 times basis and added a tiered holding-period schedule (50% of gain excluded at three years, 75% at four, 100% at five); stock acquired on or before that date keeps the prior $10 million cap and the five-year rule.
When you read a search fund’s private placement memorandum, the terms that carry the economics are these:
- Equity step-up: search-phase investors receive a bonus, usually 1.5x, on their capital when the acquisition closes, rewarding the blind-search risk.
- Pro-rata rights: search-phase investors may, but need not, invest their pro-rata share in the acquisition round.
- Board composition: the post-acquisition board usually runs 3 to 5 seats, with investors holding the majority and the operator holding one.
- Operator equity and carry: the operator typically takes 20% to 25% of the equity, vesting over 4 to 5 years, often with step-ups tied to return thresholds such as 3x, 5x, or 7x MOIC.
- Information rights: quarterly financials, annual budgets, and regular operating updates.
- Protective provisions: major moves such as new debt, a sale, or a CEO change require investor or board approval.
- Tag-along and drag-along rights: tag-along lets minority investors join a sale on the majority’s terms; drag-along lets the majority compel a sale once return thresholds are met.
The step-up, worked through
Because the step-up drives search fund economics and reliably confuses new investors, here it is concretely. An investor puts $50,000 into the search phase at a 1.5x step-up. When the acquisition closes, that $50,000 is credited as $75,000 toward the acquisition equity. If the investor then adds $100,000 at the acquisition stage, the total position reflects $175,000 of equity value, the $75,000 stepped-up plus $100,000 new. An investor who skipped the search and put in $175,000 at the acquisition stage holds exactly $175,000, with no step-up. In effect the step-up gives search-phase investors roughly a 33% discount on their acquisition equity, which is the market’s price for the risk of backing a blind search.
How to start investing in search funds
For an accredited investor, the learning curve is real but manageable, and it runs through three steps.
Start with the data and literature
The foundational resources are the Stanford GSB Search Fund Study, updated every two years and the most cited dataset on US returns, success rates, and failure modes; the IESE Search Fund Study for the international universe; the Stanford Search Fund Primer; and the HBR Guide to Buying a Small Business. For the segment’s aggregate returns, adoption, and dispersion assembled in one place with every figure labeled, CapitalPad’s search fund statistics report is the data companion to this guide.
Attend a conference
In-person events are where deal-flow relationships start. The main ones are the Stanford Search Fund Conference (the largest and longest-running), the Chicago Booth Search Fund Conference, the IESE International Search Fund Conference in Barcelona, the MIT Sloan Search Fund Conference, and various ETA events hosted through the year at Kellogg, Wharton, Tuck, and Darden. Experienced investors consistently name conference attendance the single highest-return use of pipeline-building time.
Join a community or co-investment group
Deal flow reaches investors through a few channels: alumni investor groups at the major MBA programs and online communities such as Searchfunder.com, the largest dedicated forum for operators and investors. For an accredited investor who wants to participate deal by deal, without running a search or funding a blind one, the direct route is a co-investment group.
CapitalPad is a private equity co-investment group for Search Fund Investing. CapitalPad lets accredited investors invest in post-LOI search fund and self-funded search deals in lower middle market companies, one company at a time, rather than committing capital to a blind-pool fund. Investors evaluate each specific company on its own merits before any capital moves.
CapitalPad brings investors in at the acquisition stage, once a specific company is under letter of intent. Each deal opens with a blinded teaser, and an investor underwrites the real business, its price, its debt, and its operator, skipping the blind-search phase, where search-stage capital can be lost entirely if a searcher never closes a deal. CapitalPad pools participating investors into a deal-specific SPV, and minimums start at $25,000 per deal. Accredited investors can review current opportunities and apply for access on CapitalPad’s investor page.
Start small and diversify
Because outcomes disperse widely, most experienced investors spread capital across several deals. A practical path is to start with two or three deals to build pattern recognition, spread them across different operators, industries, and geographies, reserve capital for follow-ons in the best performers, plan for a five-to-seven-year hold on each, and consider mixing traditional search-phase commitments with post-LOI, deal-by-deal positions to balance risk against control. For a framework to run on any single deal, see the guide to evaluating a deal.
FAQ
How is search fund investing different from a private equity fund?
A private equity fund raises a blind pool and buys a portfolio of companies run by their own managers; a search fund raises for one company at a time and installs the searcher as CEO. The search fund investor therefore carries concentrated, single-company risk and single-operator, key-person risk, in exchange for direct visibility into the specific business and unusually tight alignment with the person running it.
Can you lose money in a search fund?
Yes, at two points. In the search phase, capital is a near-total loss if the operator never closes an acquisition, which happens in a meaningful share of searches. After acquisition, the single company can underperform or fail, and there is no portfolio to absorb it. The wide dispersion of outcomes is exactly why diversifying across several deals is the standard advice.
How long is capital tied up?
Plan for a five-to-seven-year hold per acquisition, and sometimes longer. Search funds are illiquid private securities with no interim market; investors are paid when the company is sold or recapitalized, and the timing depends on the business and market conditions rather than a set schedule.
Disclosure: CapitalPad offers private equity co-investment opportunities to accredited investors. This article is educational and does not recommend any specific investment, sponsor, sector, security, or strategy. Private securities are speculative, illiquid, and may result in partial or total loss of capital. Historical study data, academic findings, and aggregate return figures are not forecasts of future performance and should not be relied on as a promise of liquidity, return, or exit timing.
Sources & References
- Stanford Graduate School of Business, “2026 Search Fund Study: Selected Observations,” case E-967 (June 2026; data through 31 December 2025), and the Stanford GSB Search Fund Study series and Search Fund Primer. https://www.gsb.stanford.edu/faculty-research/case-studies/search-funds
- IESE Business School, “International Search Funds 2024” (study ST-658-E). https://www.iese.edu/entrepreneurship/search-funds/
- Richard Ruback and Royce Yudkoff, “HBR Guide to Buying a Small Business,” Harvard Business Review Press. https://store.hbr.org/product/hbr-guide-to-buying-a-small-business/10103
- U.S. Small Business Administration, “7(a) loans” ($5M maximum loan; up to roughly 90% acquisition financing). https://www.sba.gov/funding-programs/loans/7a-loans
- U.S. Securities and Exchange Commission, “Accredited Investors” (Regulation D; income, net worth, and license criteria, current for 2026). https://www.sec.gov/education/capitalraising/building-blocks/accredited-investor
- Internal Revenue Code Section 1202 (Qualified Small Business Stock), as amended by the 2025 tax act (per-issuer cap raised to $15M and tiered holding periods for stock acquired after July 4, 2025). https://www.irs.gov/newsroom/qualified-small-business-stock
- Axial, lower middle market deal network. https://www.axial.net/
- BizBuySell, small-business marketplace. https://www.bizbuysell.com/
- Searchfunder.com, online community for search fund operators. https://searchfunder.com/
- CapitalPad Research, “Search Fund Research Report” (internal data companion). https://capitalpad.com/search-fund-statistics/
