Diageo has weakened major climate targets significantly—Scope 3 cut from 50% to 26% reduction by 2030, net-zero operations pushed from 2030 to 2040—while Scope 3 emissions (94% of total) continue rising. Operational reporting is solid, but supply chain accountability remains thin and a £1.2m regulatory fine for emissions non-reporting signals compliance failures.
Same formula for every company. No curve. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Carbon Footprint — Operations and Energy Source (8/10, 7/10). Weakest on Controversies & Red Flags and Emissions Trajectory (4/10, 4/10).
21 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 35 major food & beverage (non-meat) brands we've scored, Diageo sits 12th of 35.
Score history begins 5 April 2026.
As Diageo'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.
Diageo is a multinational alcoholic beverages company headquartered in London, producing spirits, beer, and wine across 180+ countries. It is the world's largest spirits producer by volume, with flagship brands including Johnnie Walker, Guinness, Smirnoff, and Tanqueray. The company operates distilleries, breweries, and distribution networks globally.
Peer beverage producer with comparable scale; useful sustainability performance benchmark across emissions and water stewardship.
View breakdown →Largest brewing company globally; relevant comparison for supply chain emissions management and regenerative agriculture scaling.
View breakdown →Large multinational with history of target weakening and supply chain accountability gaps; similar governance and reputation risks.
View breakdown →Packaged goods peer with comprehensive ESG reporting and regenerative agriculture programs; stronger circular economy ambition.
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.