What Is Considered Middle Market Private Equity?
Middle market private equity usually means buyouts of established companies worth about $50M to $500M. Here is how the size bands differ and what they mean for financing.
Middle market private equity means investing in established, mid-sized companies. The usual test is size: a company is considered middle market when its enterprise value falls in a band between the small-business end and the large-cap end. The exact band depends on who defines it, so the answer is a range rather than one number.
The short answer
Most sources put the middle market between roughly $50 million and $500 million in enterprise value. According to Investopedia, middle market private equity refers to funds that invest in companies worth between $50 million and $500 million. Others use a larger band. Hamilton Lane uses $1 billion to $3 billion in total enterprise value, and notes that some data providers use a broader band up to $5 billion.
How the middle market is measured
There are three common ways to draw the line:
- Enterprise value. This is the price of the whole business, including debt. Fund managers use it most often.
- Revenue. Allvue describes middle market companies as those with revenues from $10 million to $1 billion.
- Deal size. Dealroom notes that middle market private equity deals often range between $10 million and $100 million.
These measures do not match each other. A company with $200 million in revenue can have an enterprise value well below or above $500 million, depending on margins and debt. When a firm says it is "middle market," check which measure it uses.
Lower, core and upper middle market
Many practitioners split the middle market into sub-segments. Allvue describes three U.S. sub-markets:
| Segment | Typical deal size (per Allvue) | What it means in practice |
|---|---|---|
| Lower middle market (LMM) | $25 million to $100 million | Smaller, founder-led or owner-led companies with the most room to grow |
| Core middle market (CMM) | $100 million to $500 million | The largest group of mid-sized buyouts |
| Upper middle market (UMM) | Above the core range, up to the large-cap threshold | Larger companies, often with more sponsors and bigger debt packages |
The upper middle market sits just below large-cap private equity. Hamilton Lane places the larger tier, from $3 billion to $10 billion, in its "mega/large" category, which is why the bands overlap across sources.
Middle market private equity vs. large-cap and venture
The middle market sits between two other segments:
- Venture capital funds young companies that are often still unprofitable. Dealroom notes that middle market deals are larger than typical venture deals.
- Large-cap private equity buys very large companies, often with strategic buyers or public listings as exits.
The middle market is often described as a "sweet spot" for diversification and moderate risk. Hamilton Lane uses that phrase directly. Companies are more established than startups but still have room to grow through operational changes and add-on acquisitions.
Why investors focus on it
The main arguments for middle market private equity are returns and deal flow. Moonfare reports that since 2000, median net IRRs for U.S. mid-market funds have been 13.5%, compared with 12.7% for large buyouts. That is a historical figure, not a promise of future results.
The market is also large. Carta reports $374.1 billion in middle market deal value in 2024. Add-on acquisitions are a major part of the activity: Carta notes that add-on deals were still a significant 74% of deals after peaking near 80% in 2022. In a typical add-on strategy, a fund buys a platform company and then merges smaller acquisitions into it.
Middle market financing: the credit side
Private equity firms buy middle market companies, and they usually fund part of each purchase with debt. That debt, along with money borrowed for growth, acquisitions or refinancing, is middle market financing. It is supplied by private lenders and credit funds rather than by banks alone.
Common types include:
- Senior debt, the first claim on the company's assets.
- Asset-based lending (ABL), secured by receivables and inventory.
- Mezzanine debt, a subordinated layer with higher pricing.
- Acquisition financing, used to buy a business.
A middle market loan is a loan to a company in this size band, sized and priced for its earnings and assets. Lenders assess revenue, EBITDA, industry and loan purpose, and loan sizes vary widely by segment.
How Thrive Funding fits in
Thrive Funding arranges private credit for middle market companies. It does not lend its own money, and it is not a private equity fund. Borrowers send one application, and it goes to private lending groups whose criteria fit the deal's size, industry, state and loan type. Each lender makes its own credit decision and issues its own term sheet. Thrive works with borrowers seeking financing from $1 million up, though its site leads with deals of $5 million and above. Requests under $1 million receive an automatic decline.
If you are a company looking for middle market financing, the practical question is which loan type fits your use of funds. If you are an investor, the question is which size band and strategy a fund targets.
Sources
- What is Middle Market Private Equity? Deal Size & Strategies
- Mid-market private equity: what it is and why it matters
- What is Middle Market Equity? (Overview & Key Opportunities)
- The Case for Middle Market Private Equity
- Understanding Middle Market Firms: Definition, Criteria
- What is Middle Market Private Equity
Frequently asked questions
What is middle market financing?
Middle market financing is debt provided to mid-sized companies, typically those with enterprise values in the hundreds of millions or below. It often comes from private credit funds and includes senior debt, asset-based loans, mezzanine debt and acquisition financing. Terms depend on the borrower's earnings, assets and purpose.
What is a middle market loan?
A middle market loan is a loan to a company in the mid-sized range. Lenders size it on earnings, usually measured as EBITDA, and secure it with assets or cash flow. Pricing and structure vary by loan type and lender.
What is a middle market private equity fund?
It is a fund that buys controlling or significant stakes in mid-sized companies, improves them, and sells them later. Most funds set a target size band for each deal and often pursue add-on acquisitions to grow a platform company.
What is upper middle market private equity?
Upper middle market private equity covers the largest companies in the mid-sized range, just below large-cap buyouts. Allvue's core band runs to $500 million in deal size, while Hamilton Lane's middle market band runs to $3 billion in enterprise value, so the upper end depends on the source.
Chris Irving
Co-Founder @ Thrive
Arranges middle market financing with private credit funds, asset-based lenders and other lending partners.
