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Quantum Energy Partners

Quantum Energy Partners acquires controlling stakes in established, profitable businesses, from Houston, Texas. It states a focus on energy & utilities.

Capital raised$8.6bnacross 11 SEC-filed vehicles
Most recent fund2025filing since 2014
HeadquartersHouston, Texas
Stated fund sizeOver $30 billion since inception

Stated investment criteria

What Quantum Energy Partners says it buys

Read from Quantum Energy Partners’s own website in August 2026. This is what the firm says it buys, not what anyone has recorded it buying, and figures are shown in the currency the firm itself used - nothing here is converted. Every line links to the page it was read from.

Transaction typesGrowth1
Founded19981

A stated mandate is a firm’s description of itself and was true of the page on the day it was read; firms widen and narrow what they will look at without updating the site. Nothing here is a commitment by Quantum Energy Partners to consider any particular business, and nothing on this page is represented as being for sale.

SEC filings

What Quantum Energy Partners has raised

From this firm's own Form D filings. A fund files one within fifteen days of its first sale, under penalty of perjury, which makes these the hardest numbers on the page.

Vehicles filed11
Total capital raised$8.6bn
Largest single vehicle$3.5bn
Filing history2014 to 2025
Smallest accepted commitmentNone stated
Filed fromTEXAS

Form D covers US-domiciled vehicles raised from accredited investors. It will not capture a fund raised outside the United States, separately managed accounts, or capital deployed off balance sheet, so treat these as a floor rather than a total.

Recorded transactions

Buying and selling

Deals in which Quantum Energy Partners is named as buyer or seller in the transaction archive. 1 recorded exit, most recently in 2023.

CompanySideCounterpartyYearConsideration
ConnectGenSoldRepsol2023$768m

Compiled from a transaction archive of 10,204 recorded deals. Most private transactions are never disclosed, so this is a sample of a firm’s activity rather than a complete record of it.

Valuation context

Transaction values in Energy & Utilities

What companies have actually sold for in energy & utilities, across 584 recorded transactions.

Median consideration$180m
Middle 50%$45m-$420m
Revenue multiple1.4×
EBITDA multiple7.1×

The full energy & utilities picture - most active acquirers, recent transactions and every investor in the sector.

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Comparable investors

Similar mandates

Other buyout pe investors active in energy & utilities.