What the Concentration Actually Looks Like

Megadeals in H1 2026 skewed heavily toward sectors with clear strategic tailwinds. AI infrastructure, data centres, industrial gases, and specialised software have absorbed disproportionate PE capital. The middle market has stalled. Deals in the £100 million to £1 billion range have declined sharply as valuation gaps widen between sponsors and sellers.

Distribution is uneven within the megadeal segment. Blackstone, KKR, Carlyle, and Apollo now originate a disproportionate share of the largest transactions, partly because their scale enables equity commitments smaller sponsors cannot match, and partly because their debt relationships enable financing packages others cannot replicate.

Why This Is Happening Now

Three structural forces are driving the concentration. Higher interest rates make traditional LBO math work only in businesses with genuinely strong cash flow. Middle-market businesses in cyclical sectors do not clear the revised hurdle rate. Larger businesses with defensive characteristics still do. Sellers of small and middle-market businesses continue to hold to 2021-2022 valuation expectations, while sellers of larger businesses are typically institutional owners with realistic expectations. DPI pressure is pushing managers toward transactions where the exit path is clearly visible, favouring larger, more strategic assets.

What This Means for Portfolio Company Owners

Business owners considering exits face a bifurcated market. Businesses with EBITDA above £50 million and defensive characteristics attract genuine PE interest at reasonable multiples. Businesses below approximately £20 million EBITDA or with cyclical characteristics face materially weaker demand. Middle-market owners increasingly turn to secondary transactions, minority recapitalisations, or strategic buyers rather than full-sale processes.

Implications for existing PE portfolios are significant. Sponsors holding middle-market businesses beyond intended hold periods face pressure to recapitalise, sell at lower multiples than underwritten, or hold longer and hope for market improvement.

What Analysts Should Actually Watch

Three signals matter over the next four quarters. Whether the middle-market bid-ask spread narrows. If middle-market sellers reset expectations, transaction activity should recover in the £100 million to £1 billion range. Whether megadeal activity sustains or peaks. The largest transactions cannot continue indefinitely if fundraising velocity does not support them. Secondary transaction volumes at LP and GP levels. Continuation funds, secondary sales, and GP-led recapitalisations are the release valve for the deployment problem.