Key points

  • Origination creates opportunities; sourcing finds and qualifies them. Both start from a written thesis and a buy box, not from a database.
  • "Proprietary" deal flow rarely means exclusive. In practice it means a first look, a relationship with the owner, or a process the buyer shaped.
  • For private equity, add-ons for existing portfolio companies are now more than half of global deal count, so sourcing is as much a portfolio activity as a fund one.
  • Measure the pipeline by stage conversion and source, not by the number of companies in the CRM.
  • Technology risk can be screened from the outside before any data room opens, and it should be.

Origination is not the same as sourcing

The two words are used interchangeably, but the work is different. Origination is the effort to create deals that would not otherwise happen to you: building relationships with owners years before they sell, developing a reputation in a sector, shaping a carve-out with a corporate parent. Sourcing is the systematic part: defining the universe of companies that fit, finding them, qualifying them and getting them into conversation. Screening then decides which ones deserve the team's time.

Firms that do this well treat origination as a long game and sourcing as an operating process with owners, targets and a weekly rhythm.

Start from a thesis and a buy box

A database will return thousands of companies for any query. What makes a list useful is the thesis behind it. Write it down before searching:

  • The sector thesis: why this market, what is changing in it, and why that change favours the kind of company you want to own.
  • The buy box: revenue or EBITDA band, geography, ownership type (founder, family, sponsor, corporate), growth and margin floors, business model.
  • The triggers: what makes an owner likely to transact in the next 12 to 24 months. Founder age and succession, a sponsor nearing the end of its hold period, a corporate parent reviewing its portfolio, a need for capital to grow.
  • The value-creation angle: what you will do that the current owner cannot. This is what you will say in the first conversation, so it has to be specific.

Proprietary and intermediated deal flow

Intermediated deals come through investment banks, M&A boutiques and business brokers. They bring prepared sellers and run competitive processes, so price discipline matters and the information is curated. Proprietary deals come from direct relationships. True exclusivity is rare; the realistic advantage is earlier access, a better understanding of the owner's priorities, and the chance to shape the process before it becomes an auction.

Most buyers need both. A useful habit is to track which banks and advisors send which deals and how many of them fit the buy box. Advisors remember who responds quickly and who explains a pass, and they send the next deal accordingly.

Where deal flow comes from

ChannelWhat it gives youWhat it costs
Investment banks and M&A boutiquesPrepared sellers, a defined process, a data room.Competition and price tension; time spent on processes you will not win.
Business brokersSmaller businesses, often owner-run.Variable preparation; diligence effort per dollar invested is higher.
Deal networks and marketplacesAccess to many smaller advisors and owners at once.Volume to filter; quality depends on your criteria.
Direct outreach to ownersEarlier conversations, sometimes no auction.Months or years of relationship-building per closed deal.
Portfolio companies (add-ons)Targets the portfolio company's management already knows: competitors, suppliers, customers.Integration capacity at the platform becomes the constraint.
Corporate carve-outsNon-core businesses that corporate parents want to sell.Separation complexity and transition services (see carve-outs).
Operating partners, lenders, lawyers, accountantsWarm introductions and early signals.Relationships that need to be maintained, not used.

Deal networks such as Axial exist because much of the lower middle market is spread across small advisory firms that no single buyer can know personally. Buyers state their criteria; the advisors representing companies see which buyers match and choose whom to approach.1

Add-ons: sourcing for the portfolio

Buy-and-build strategies have made add-on sourcing a permanent activity. Preqin reports that add-on acquisitions accounted for more than half of global private equity deal count in the first half of 2026.2 Add-on sourcing works differently from platform sourcing: the portfolio company's own management often knows the targets, the thesis is about fit with the platform, and the binding constraint is usually the platform's capacity to integrate. That last point matters for technology. An add-on strategy that assumes every acquisition moves onto the platform's ERP, identity system and security tooling within months needs a platform that can actually absorb them.

Running the outreach

  • Write to the owner, not the company. The first message says why this business, why you, and what you would do together, in a few sentences.
  • Plan a cadence, not a campaign. Owners who are not ready today may be ready in two years. Record what they said and when to come back.
  • Lead with the conversation, not the valuation. An early number anchors the discussion before you know the business.
  • Protect confidentiality from the start. A non-disclosure agreement before any financial or technical information changes hands, and a clear record of what was received.
  • Keep the CRM honest. Every owner conversation logged, with source, stage and next step. Relationship-intelligence CRMs capture email and calendar activity automatically, which helps, but someone still has to write down what the owner said.

The tools

A typical sourcing stack has three layers: a private-company database to define and search the universe, a CRM to manage relationships and the pipeline, and a contact-data tool to reach the right person. Marketplaces and deal-intelligence services sit alongside. The market has consolidated: Datasite now owns Grata and, since August 2025, Sourcescrub, which it is combining with Grata.3 Our directory of deal origination tools and platforms lists about thirty of them by category, with what each does and when we last checked it.

Measuring the pipeline

The number of companies in a CRM measures effort, not progress. The measures that change decisions are:

  • Coverage: what share of the companies that fit the buy box you have identified, and what share you have spoken to.
  • Conversion by stage: contacted → first meeting → information received → indication of interest → letter of intent → closed. A drop between two stages shows where the process breaks.
  • Source attribution: which channel produced the deals that reached letter of intent, not just the ones that entered the funnel.
  • Time in stage: deals that sit at "information requested" for months are usually dead and should be closed out.
  • Reasons for passing: recorded every time, so the buy box can be tightened.

Screen technology risk before the data room opens

For businesses whose value sits in software, data or digital channels, a short outside-in review before an indication of interest avoids surprises later:

  • Public breach disclosures, regulatory actions and litigation involving data or security.
  • Job advertisements: hiring for platforms near end of life, or repeated searches for the same senior engineering role.
  • The product's dependence on one cloud, one software vendor or one AI model provider.
  • For AI-native targets, the questions in our case study on diligencing AI companies: model provenance, training-data rights, compute costs.
  • Who built the core product, and whether they are still there.

None of this replaces diligence. It tells you which questions to put on the information request list on day one of exclusivity.

Sourcing for corporate development

Corporate acquirers source differently from financial sponsors. The thesis starts from strategy: a capability the company lacks, a market it wants to enter, a competitor whose product would close a gap. That changes three things:

  • Build, buy or partner. Every target should be compared with the cost and time of building the capability or partnering for it. An acquisition is the most expensive of the three and should win on speed, certainty or defensibility.
  • The business owns the thesis. Corporate development runs the process, but the business unit that will own the target has to want it and commit to integrating it.
  • Integration is part of the screen. A target that cannot be integrated into the company's systems, culture or regulatory perimeter at a reasonable cost is not a target, however good the strategic fit.

Mapping a market

A market map is the working document that turns a thesis into a list. A practical way to build one:

  1. Define the segments in the customer's terms (what they buy and why), not by industry codes.
  2. Find the companies in each segment from several sources: databases, trade-association member lists, conference exhibitor lists, customer and supplier references, job boards.
  3. Add what matters for the buy box: estimated size, ownership, location, growth signals.
  4. Mark the companies you already know and the advisers who represent them.
  5. Prioritise by fit and by the likelihood of a transaction, then plan outreach for the top tier.

Keep the map alive in the CRM rather than in a slide. It is also the first piece of evidence for an Investment Committee that the team understands the market.

The first conversation with an owner

The first meeting decides whether there is a second. Owners talk to buyers who understand their business and listen more than they pitch. Useful questions:

  • How did the business get to where it is, and what would the owner do with more capital or support?
  • What does the owner want for themselves, the team and the company in the next five years?
  • Who else matters in the decision: family, co-founders, key managers?
  • What would a good partner do in the first year, and what would worry the owner about a sale?

Write down the answers. They are the material for the indication of interest, and they tell the deal team which concerns (people, brand, legacy, technology) the offer must address.

Winning a banked process

In an auction, price matters, but advisers and sellers also weigh certainty and speed. Buyers who win banked processes without overpaying tend to do three things well: they respond quickly and clearly at each round, they show they understand the business in the management presentation, and they arrive at the second round with a specific diligence plan, including the technology and cyber questions, so the seller can see how and when the deal will get done.

Common pitfalls

  • Searching a database before writing the thesis, then rationalising the list.
  • Counting companies instead of conversations.
  • Treating advisors as a channel to be harvested rather than a relationship.
  • Letting add-on sourcing outrun the platform's ability to integrate.
  • Leaving technology questions until exclusivity, when there is least time to answer them.

Checklist

  • Written sector thesis and buy box, agreed by the deal team.
  • Triggers listed for each target segment (succession, sponsor exit, corporate review).
  • Universe defined and sized; coverage tracked.
  • Outreach cadence and owner notes in the CRM, with next steps dated.
  • Advisor relationships tracked by deals sent and deals that fit.
  • Stage conversion and source attribution reviewed monthly.
  • Outside-in technology screen done before any indication of interest.

Sources

  1. Axial, how the network works
  2. Preqin, “Buy-and-build gains ground in private equity” (2026)
  3. Business Wire, “Datasite to Acquire Sourcescrub” (8 August 2025)