ScottishPower has divested all fossil fuel generation and operates 100% renewable electricity from its own UK wind farms. Parent Iberdrola holds SBTi-validated net-zero targets with 63% progress toward 2030 goals. Weaknesses: subsidiary-level emissions data is consolidated into parent reporting, limiting transparency; biodiversity and waste metrics lack quantified disclosure; water impact is understated rather than measured.
Same formula for every company. No curve. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Energy Source and Targets & Commitments (9/10, 8/10). Weakest on Water Impact and Resource Use & Waste (4/10, 5/10).
17 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
If you believe a source has been misread or a newer version exists, submit a challenge.
Among the 17 major energy supply / utilities brands we've scored, ScottishPower sits 2nd of 17.
Score history begins 5 April 2026.
As ScottishPower's score updates, the trajectory will appear here.
We're backfilling historical scores for FTSE 100 and S&P 100 companies over the coming weeks.
Every challenge is published. We'd rather be corrected than wrong — that's the whole point.
No challenges submitted yet. If you have evidence that contradicts this score, you can challenge any question above — cite a public source and we'll review it.
ScottishPower is a UK energy supply and networks company headquartered in Glasgow, wholly owned by Spanish utility Iberdrola since 2007. It operates electricity distribution networks across central and south Scotland, supplies retail customers, and owns over 3GW of renewable generation capacity including major onshore and offshore wind farms. A leading renewable energy operator in the UK with zero fossil fuel generation.
Similar renewable generation transition and parent-subsidiary consolidation dynamics in sustainability reporting.
View breakdown →European utility peer with comparable net-zero targets and renewable portfolio; similar issues with subsidiary-level granularity.
View breakdown →UK retail energy supplier; offers contrast on transparency, scale, and renewable backing claims.
View breakdown →UK energy peer with fossil fuel divestment history and similar net-zero commitments; useful comparison on UK sector leadership.
View breakdown →Email alerts when a rubric question is verified, a challenge is resolved, or the overall score changes.
One email, every Sunday. Score changes, new research, the stories behind the numbers. Free.
No spam. Unsubscribe in one click.
Readers and institutions support our work. Companies can pay to submit evidence we couldn't find. Neither type of payment changes a score.