1. Executive Summary

There is no universally accepted set of thresholds that institutional LPs, consultants, data providers, and investment banks use to classify private equity Buyout and Growth Equity strategies by deal-level economics. Each major source maintains its own framework, anchored to one of three primary metrics — Enterprise Value (EV) at entry, EBITDA, or Revenue — with Equity Check Size and Fund Size typically used as cross-reference variables rather than primary anchors.

The clearest pattern from sophisticated LP advisors (Cambridge Associates, Hamilton Lane, StepStone, Preqin) is that they classify funds by capitalization (and size brackets shift by vintage), while practitioner banks and data providers (PitchBook, GF Data, Houlihan Lokey, Lincoln, Capstone, Harris Williams, Argos) classify deals by EV and EBITDA. Most robust LP frameworks build multi-metric rules that combine EV plus EBITDA with sector/leverage qualifiers.

For Growth Equity narrowly defined — bootstrapped, founder-owned, near-profitable, low-leverage minority/structured majority deals — the cleanest definitions come from Cambridge Associates, StepStone, and the National Venture Capital Association (NVCA), and from the GP marketing pages of TA Associates, Summit Partners, General Atlantic, Spectrum, and JMI. Data on growth equity deal-size tiers is materially thinner than for buyout, and most public datasets contaminate "growth equity" with late-stage venture (Series C/D+ pre-profit cash burn). Any segmentation a $9bn family office adopts should therefore include explicit profitability and leverage filters to keep the bucket pure.

This report assembles thresholds from 18 distinct sources, organized into side-by-side comparison tables by metric, separately for the United States and Europe, followed by a synthesis and recommendation.

2. Sources Used and What They Anchor On

3. Buyout — Enterprise Value (EV at Entry) Thresholds

3.1 United States

3.2 Europe

4. Buyout — EBITDA Thresholds

4.1 United States

4.2 Europe

5. Buyout — Revenue Thresholds

5.1 United States

5.2 Europe

6. Buyout — Equity Check / Deal Value Thresholds

6.1 United States

StepStone (Wikipedia profile): targets equity checks $15M–$200M in firms with EV $150M–$2.5B — characteristic mid-/upper-mid range. Bain: $1B+ deals = 77% of US value in 2024; megadeals = $5B+ N. Am.

6.2 Europe

7. Growth Equity — Equivalent Tables (Data Is Materially Thinner)

The cleanest sources that segment narrowly are:

• Cambridge Associates (2018 white paper "Growth Equity: Turns Out, It's All About the Growth"): defines growth equity as bootstrapped, generally profitable or near-profitable at entry, with EBITDA "at or near positive" expected within 12–18 months and little to no leverage. CA explicitly contrasts this with VC-backed companies that "run significant operating losses for extended periods."
• StepStone (2022 white paper "Growth Equity — Feeling the L-O-V-E"): targets are founder/management-owned with no prior institutional capital, ≥5 years old, proven business model, revenue growth >20%, strong capital efficiency with positive or near-positive EBITDA margins, meaningful minority stake (>20%).
• NVCA: "Company's revenues are growing rapidly. Company is cash flow positive, profitable or approaching profitability. Company may be founder-owned and often has no prior institutional investment."
• Callan growth-equity vs late-stage VC: stresses degree-of-profitability and absence-of-future-dilution as the cleanest distinguishing axes.
• GP self-definitions: TA Associates, Summit Partners, General Atlantic, Spectrum Equity, JMI Equity all publicly emphasize profitable growth as the bright line vs. VC.

7.1 Growth Equity — Enterprise Value (US)

7.2 Growth Equity — Revenue (US)

Most-cited operational profile (PipelineRoad): "$10–100M revenue, growing 15–40% annually, profitable or approaching profitability, founder-led, large addressable market."

7.3 Growth Equity — EBITDA (US)

EBITDA is structurally weak as a primary anchor for growth equity:

• Cambridge Associates: growth equity portfolio companies typically run "close to breakeven" at entry; EBITDA may dip in the first 1–2 years (the "g-curve") before scaling.
• StepStone: "near-positive EBITDA margins" is the threshold criterion, not a tier.
• Practitioner standard: EBITDA is de-emphasized; revenue growth is the dominant return driver.

Practical EBITDA bands implied by GP self-disclosures:

• LMM Growth: $0–$5M EBITDA
• Core MM Growth: $5M–$25M EBITDA
• UMM Growth: $25M–$100M EBITDA
• Large Cap Growth: $100M+ EBITDA

Most LPs do not anchor growth equity tiers on EBITDA. They use revenue growth + profitability flag (yes/no) + EV.

7.4 Growth Equity — Equity Check / Deal Value (US)

7.5 Growth Equity — Europe

European growth equity data is even thinner than US data. The European market is materially smaller and less crisply segmented from VC.

Data quality warning for Europe: Invest Europe groups growth/expansion into its Mid-Market Platform rather than separately. Cambridge Associates' "Ex US Growth Equity" benchmark has a small sample. Most European growth-equity deals can equally be described as small-cap buyouts using minority/structured-majority structures.

8. Cross-Reference: Fund Size Mapping (Historical Anchor, US & Europe)

This is the critical comparison table to map the family office's current size-based framework to deal-level economics.

Family office's current mapping vs. industry standard

9. Synthesis

9.1 Which Metric Is the Primary Anchor Among Sophisticated LPs?

Across the 18 sources reviewed, Enterprise Value (EV) at entry is the dominant primary anchor, used by PitchBook, Hamilton Lane (deal-level), Capstone Partners, AXA IM Alts, Pantheon, HarbourVest, Argos (via equity value, an EV proxy), Houlihan Lokey, Harris Williams, and most fund-of-funds. EBITDA is the dominant secondary anchor, used as the primary anchor by GF Data, Lincoln International, KKR (for credit), and as a critical filter on EV. Revenue is the dominant industry-association and regulatory anchor (AIC, NCMM, EU SME, Invest Europe member-survey methodology), but is rarely the primary anchor for sophisticated LP deal-level segmentation. Fund size remains the most-used proxy at the fund-commitment level (Cambridge, Preqin, Hamilton Lane fund-level analysis) but is universally recognized as a lagging proxy for deal economics.

9.2 Trade-offs Among EV, EBITDA, and Revenue Anchors

• EV is multiple-cycle-distorted. The same business at 6x EBITDA in 2010 and 12x EBITDA in 2021 has 2x the EV but identical operating fundamentals. This means an EV-only segmentation drifts upward in bull markets and downward in bear markets, creating false reclassifications. Hamilton Lane's recent move to call $1–3B TEV "middle market" — vs. PitchBook's $25M–$1B — partly reflects this multiple-cycle drift.
• EBITDA struggles for asset-light and pre-profit growth deals. Many software, tech-enabled services, and consumer-internet companies in growth equity have negligible or negative EBITDA at entry. Cambridge Associates explicitly notes that growth equity deals exhibit an "EBITDA J-curve" (or "g-curve") in the first 1–2 years of investment. Asset-light businesses (SaaS, marketplaces) also can have noisy or aggressive EBITDA add-backs.
• Revenue is sector-distorted. A $200M-revenue distributor and a $200M-revenue SaaS company have radically different profitability, capital intensity, and EV. AIC and PitchBook revenue-based MM definitions ($10M–$1B revenue or $11M–$500M revenue) are useful for population framing but produce nonsensical EV bands when used as the primary anchor.

9.3 How Leading LPs Build Multi-Metric Rules

The most sophisticated frameworks combine at least two of (EV, EBITDA, Revenue) plus qualifiers:

• Pantheon's published rule: mid-market = revenue up to $1B AND EBITDA up to $150M AND EV up to $2.5B (composite three-metric rule).
• StepStone's growth-equity rule: revenue growth >20% AND positive/near-positive EBITDA margins AND no prior institutional capital AND ≥5 years old AND minority/structured stake.
• Bain's middle-market private-credit rule: revenues <$500M AND total loan package <$500M.
• Cambridge Associates' growth-equity rule: EBITDA positive or expected within 12–18 months AND little/no leverage AND bootstrap heritage.
• Hamilton Lane's deal-level rule: TEV $1–3B as the explicit "sweet spot" for middle market.

Notably, no sophisticated LP relies on EV alone or revenue alone. The dominant pattern is EV as primary anchor + EBITDA as secondary anchor + leverage and sector as qualifiers.

9.4 Special Considerations for Growth Equity

Because EBITDA and leverage are weak segmentation metrics for growth equity, sophisticated growth-focused LPs (StepStone, Cambridge, Callan) tend to use:

1. Revenue + Revenue growth rate as the primary anchor (e.g., "Core MM growth = $50M–$200M revenue growing 25%+"), not EBITDA.
2. A profitability flag (binary) as a critical filter: profitable or near-profitable (≤24 months to profitability) → growth equity; pre-profit and continuing dilution expected → late-stage VC.
3. A leverage filter (binary): low/no leverage → growth equity; substantial leverage → buyout (even if minority stake).
4. A "prior institutional capital" filter: limited prior capital → bootstrap / first-institutional growth; significant prior VC rounds → late-stage VC.

Without these qualifiers, any growth-equity dataset will be polluted by Series C/D crossover deals that have categorically different risk profiles.

9.5 Recommended Approach for a $9bn Family Office

9.6 Where Sources Materially Disagree (Flagged Conflicts)

1. Middle-market ceiling: PitchBook says $1B EV; Hamilton Lane says $3B TEV; Pantheon says $2.5B. The $1B vs $3B disagreement is the single largest definitional gap and reflects multiple-cycle drift over the past decade. Recommendation: use $2.5B as the LMM/MM/UMM ceiling and $10B as the large-cap/mega boundary.
2. Mega-cap fund threshold: Cambridge $10B (vintage 2006–2015); Preqin $4.5B; Moonfare often uses $5B. The $10B figure is the most defensible for current vintages and aligns with the family office's existing framework.
3. LMM EV floor: GF Data tracks down to $1M TEV; PitchBook MM starts at $25M; Capstone uses $10M. Recommendation: use $25M as the LMM floor in the US (€15M in Europe) for a sophisticated LP — below this is almost exclusively non-institutional small-business M&A.
4. Growth equity vs late-stage VC: Cambridge, NVCA, StepStone, and Callan are clearest on profitable/near-profitable as the dividing line. PitchBook and Preqin growth-equity benchmarks blur this. Recommendation: define growth equity narrowly per the multi-metric rule above and accept that the consequence is a smaller, harder-to-source universe than off-the-shelf data providers report.
5. European MM ceiling: Argos uses €500M equity value; PitchBook EU uses €500M deal size; AXA IM Alts uses €500M; HarbourVest uses ~€1B. Recommendation: use €500M EV as the MM/UMM boundary and €1.5B as the UMM/large-cap boundary in Europe.
6. Investment banks (Houlihan Lokey, William Blair, Jefferies, Harris Williams, Baird): publish very limited quantitative size definitions (their MM scope is implicit in deal-flow rather than codified). For European mid-cap LBOs, Houlihan Lokey's pan-European MidCapMonitor provides the deepest disclosed sample, with deal-size range roughly €20M–€1B EV.

10. Concluding Note on Implementation

A multi-metric rule framework — EV as primary anchor, EBITDA as secondary, with explicit profitability and leverage filters for growth equity — provides materially better resolution than fund size alone for a $9bn family office's purposes. It will:

1. Prevent misclassification of large mid-market funds whose deal economics put them in upper-MM rather than large-cap territory;
2. Prevent misclassification of multi-strategy mega-funds that deploy a mid-market sleeve;
3. Cleanly separate growth equity from late-stage VC; and
4. Accommodate the systematic ~30–40% size discount of the European market relative to the US.

The framework should be reviewed every 2–3 years to adjust for multiple-cycle drift, mirroring Cambridge Associates' practice of resetting its fund-capitalization matrix by vintage.