Glossary · Strategy
Buy-and-Build
Also called: roll-up · platform-and-add-on strategy · consolidation strategy
Buy-and-build is a private equity strategy in which a sponsor acquires a platform company and grows it through a programme of add-on acquisitions, aiming to sell a larger business for more than the combined prices paid and invested.
The sponsor buys one well-run company in a fragmented industry and uses it to buy smaller competitors or complementary businesses. If the combined company runs better, wins more customers and is valued at a higher multiple than the small businesses were bought for, the sponsor earns more than it would from growing one company alone. If integration fails or too much is paid, the extra debt and complexity make the outcome worse.
How the strategy works
A buy-and-build has three parts: a platform investment bought as the base, a series of add-on acquisitions made by the platform, and integration that turns the acquired businesses into one company. Value can come from organic growth, cost savings and cross-selling once businesses are combined; a better exit, because a larger company attracts more buyers and may be able to list; and multiple arbitrage. Fragmented markets with many small owner-managed businesses, such as many professional, technical, healthcare and business services sectors, are the usual setting because they supply a steady flow of targets.
Roll-up and buy-and-build
The two terms are often used as synonyms. Where they are distinguished, a roll-up consolidates many small, similar businesses and leans heavily on scale and multiple arbitrage, while a buy-and-build is a broader programme in which integration and organic growth carry as much of the plan as the acquisitions. Outside private equity, serial acquirers and listed holding companies follow similar strategies without a planned exit date.
Multiple arbitrage
Multiple arbitrage is the gain from buying earnings at a lower EV/EBITDA multiple than the combined business is later valued at. It is not the same as multiple expansion of a single company, although value bridges often report the two together. It holds only under three conditions: buyers at exit pay the higher multiple for the combined earnings, the acquired earnings survive integration, and market multiples do not fall in the meantime. The worked example shows how quickly the gain disappears if the exit multiple ends up close to the blended price paid.
Risks and failure modes
Integration is a frequent point of failure: systems that never merge, customers and key staff lost during the transition, and management stretched by the pace of deals. Prices for add-ons tend to rise as more buyers pursue the same sectors, which erodes the arbitrage. Debt-funded add-ons cause leverage creep, and pro forma adjusted EBITDA that counts savings before they are achieved can hide it. A string of small purchases in one concentrated local market can draw competition-law scrutiny that no single deal would; in the US, each add-on that meets the premerger notification thresholds, which are adjusted every year, also needs a filing with the antitrust agencies, unless an exemption applies, and cannot close until the statutory waiting period has expired. And the whole case can depend on a single exit assumption: that a buyer will pay the platform multiple for everything that was bought.
How LPs diligence buy-and-build managers
LPs ask for a value bridge that separates acquired EBITDA from organic growth and shows the multiples paid for add-ons against the platform's entry and exit multiples; total equity invested in each platform over time, not just at entry; evidence of integration, such as common systems and retention of acquired customers and staff; and leverage on achieved rather than pro forma EBITDA. They also check whether the manager charges portfolio company fees on each add-on and how those fees are offset; the ILPA Reporting Template, in its 2016 and 2025 versions, standardises disclosure of fees paid to the GP, its affiliates and third parties.
Worked examples
Illustrative multiple arbitrage ($ millions)
A sponsor buys a platform with EBITDA of $50m at 10.0x, paying $500m. Over three years the platform buys three add-ons with combined EBITDA of $20m at 6.0x, paying $120m. Total enterprise value paid is $620m for $70m of EBITDA, a blended 8.9x. If the combined business is sold at the platform's 10.0x with no EBITDA growth, it is worth $700m: $80m of value from the multiple difference alone, before transaction and integration costs and before any effect of the extra debt.
Same programme, lower exit multiple
If buyers at exit value the combined business at 8.5x instead, it is worth $595m, $25m less than the enterprise value paid, before any costs. Nothing in the businesses changed; the arbitrage depended entirely on the exit multiple.
Examples are illustrative; figures are not market data.
Not the same as
- Platform Investment: The platform is the first acquisition in a buy-and-build; buy-and-build is the whole programme.
- Add-On Acquisition: An add-on is one acquisition by the platform; buy-and-build is the strategy built from many of them.
- Leveraged Buyout (LBO): A leveraged buyout (LBO) is a single financed acquisition of control; buy-and-build is a multi-acquisition strategy that usually starts with one.
- Holding Company: A permanent holding company that acquires serially has no planned exit; a private equity buy-and-build is built to be sold.
How it is classified
- Classify a strategy as buy-and-build when the investment thesis at entry relies on a series of acquisitions made through the platform.
- A single opportunistic add-on does not make a deal a buy-and-build.
- Classify serial acquisitions by a permanent holding company with no exit horizon as a holding-company strategy, not private equity buy-and-build.
Common mistakes
- Treating multiple arbitrage as value created without testing whether an exit buyer will pay the higher multiple.
- Presenting acquired EBITDA as organic growth or operational improvement.
- Judging leverage on pro forma adjusted EBITDA that includes savings not yet achieved.
- Reporting a platform and its add-ons as one track-record line without disclosing the capital deployed after entry.
- Assuming a fragmented market guarantees cheap targets; prices rise as more buyers pursue the same sector.
Edge cases
- A programme can outlast the fund that started it; moving the platform into a continuation vehicle or another fund of the same sponsor creates pricing conflicts.
- Merging two sponsor-owned platforms combines two strategies and may change who controls the result.
- Funding add-ons largely with new equity lowers leverage risk but reduces the arbitrage earned per unit of equity.
Sources
- ILPA Reporting Template (2016) and Reporting Template Guidance v1.1. Institutional Limited Partners Association, ILPA, Version 1.0 January 2016 (part of the Fee Transparency Initiative); guidance v1.1 October 2016. Status: Superseded for new reporting by Reporting Template v2.0 (Jan 2025) (checked 2026-10-01). Template guidance v1.1, Sections A-B — supports: Standardised reporting of fees paid to the GP, affiliates and third parties, including fees not subject to offset
- ILPA Reporting Template (v. 2.0). Institutional Limited Partners Association, ILPA, v2.0 released 21 January 2025 under the Quarterly Reporting Standards Initiative (QRSI). Status: Current; ILPA recommends implementation from Q1 2026 (checked 2026-10-01). v2.0 — supports: Updated template on fees, expenses and carried interest, recommended from Q1 2026
- 15 U.S.C. 18a - Premerger notification and waiting period. U.S. Congress (US Code via LII), Current US Code text as published by LII (accessed 2026-10-01). Status: in force (checked 2026-10-01). 15 U.S.C. 18a(a), (a)(2), (b)(1)(A) — supports: Premerger notification to the FTC and the DOJ Antitrust Division and expiry of the waiting period before closing for acquisitions within the section's scope, except as exempted under 18a(c); size thresholds adjusted for each fiscal year