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Sector Rankings

Most Sustainable Energy Supply / Utilities Companies 2026

17 Energy Supply / Utilities companies ranked 0–100 on real environmental impact using SINK's open, physics-first formula.

17
Companies ranked
38
Sector average
55
Sector best (Good Energy)
Full ranking
1
⚡Good EnergyMaking progress
55
2
⚡ScottishPowerMaking progress
51
3
⚡EcotricityBelow expectations
45
4
⚡SSE plcBelow expectations
45
5
⚡OVO EnergyBelow expectations
42
6
⚡E.ONBelow expectations
41
7
⚡Vattenfall ABBelow expectations
40
8
🐙Octopus Energy GroupBelow expectations
39
9
⚡National GridBelow expectations
39
10
⚡Électricité de France (EDF)Below expectations
39
11
⚡Enel S.p.A.Below expectations
38
12
⚡IberdrolaBelow expectations
38
13
⚡ENGIEBelow expectations
34
14
🔥British GasSignificant gaps
30
15
⚡NextEra EnergySignificant gaps
26
16
⚡Southern CompanySignificant gaps
25
17
⚡Duke EnergySignificant gaps
25
Frequently asked

Energy Supply / Utilities sustainability, answered.

Which Energy Supply / Utilities company is the most sustainable?

Good Energy is the highest-scoring Energy Supply / Utilities company on SINK with a score of 55/100 (Making progress).

What is the average sustainability score for Energy Supply / Utilities companies?

The average SINK score across 17 Energy Supply / Utilities companies is 38/100. The global average across all scored companies is 38/100.

How does SINK rate Energy Supply / Utilities companies?

SINK scores Energy Supply / Utilities companies on 10 questions using public data: Scope 1/2/3 carbon footprint, energy source, nature and biodiversity, resource use, water impact, emissions trajectory, science-based targets, transparency, and major controversies. The formula adjusts for the industry's inherent environmental footprint and company scale.

Which Energy Supply / Utilities company has the worst sustainability score?

Duke Energy has the lowest SINK score among Energy Supply / Utilities companies at 25/100 (Significant gaps).

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