Iberdrola is Spain's largest electricity utility and Europe's leading renewable energy producer, with 40,721 employees and €54B annual revenue.
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Iberdrola leads European utilities on emissions and renewables—84% zero-carbon generation, SBTi-validated net-zero by 2039—but absolute emissions exceed 50 Mt CO₂e and gas operations remain material. Corporate espionage investigation and regulatory fines in US subsidiaries expose governance gaps. Transparency is strong; the transition pathway is real but incomplete.
Iberdrola scores 38/100 (Below expectations) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified May 2026.
That places Iberdrola joint 410th of 847 companies scored, and joint 9th of 20 in Energy Supply / Utilities.
Where Iberdrola sits among energy supply / utilities peers.
Among the 20 major energy supply / utilities brands we've scored, Iberdrola is tied =9th of 20, with 2 others.
Its three lowest-scoring questions, and what the evidence didn't show.
Granular waste metrics and supply chain material transparency remain limited in public data.
Villarejo corporate espionage investigation (2004–2017) closed 2022 on statute of limitations grounds; PwC forensic report found no illegal current management conduct.
The full reasoning is in the ten questions below.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Carbon Footprint — Operations and Targets & Commitments (8/10, 8/10). Weakest on Resource Use & Waste and Controversies & Red Flags (5/10, 5/10).
The 3 companies in the sector scoring nearest above Iberdrola.
E.ON has SBTi-validated 1.5°C targets with absolute reduction commitments, but delivery remains unverified.
See the breakdown →Vattenfall has cut Scope 1+2 emissions 53% since 2017 and operates 90% fossil-free generation, backed by SBTi validation.
See the breakdown →Octopus Energy has built comprehensive baseline emissions data and SBTi-verified net-zero targets covering all scopes, yet operational emissions are rising due to rapid growth.
See the breakdown →The formula and all 21 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale21 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
If you believe a source has been misread or a newer version exists, submit a challenge.
Iberdrola is Spain's largest electricity utility and Europe's leading renewable energy producer, with 40,721 employees and €54B annual revenue. The company generates, distributes, and retails electricity and gas across Spain, Portugal, the UK, US, Brazil, and Mexico. Founded in 1992 as a regional consolidator, it is now a major player in offshore wind and solar development.
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