Slaughter and May sustainability score: 59/100
Better than 93% of Consulting / Professional Services
Leading practice starts at 60. The highest score on SINK is 71.
Slaughter and May is a Magic Circle law firm headquartered in London, with offices across major financial centres including Brussels. It provides corporate law, dispute resolution, and advisory services to multinational clients across sectors including energy, finance, and infrastructure.
More about Slaughter and May
As a partnership, it does not publish revenue.
Head office London, United KingdomStaff ~1,500Revenue Not publishedWebsite ↗
Slaughter and May has set science-backed net-zero targets and reports third-party verified emissions, but reported total emissions rose 48% year-on-year due to methodology changes and refurbishment. It continues to provide material legal services to fossil-fuel clients, including North Sea oil and gas transactions, undermining climate credibility.
Slaughter and May scores 59/100 (Making progress) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified October 2026.
That places Slaughter and May joint 19th of 1,023 companies scored, and 3rd of 30 in Consulting / Professional Services.
What is Slaughter and May doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Targets & Commitments (8/10, 8/10). Weakest on Emissions Trajectory and Nature & Biodiversity Impact (4/10, 4/10).
Where Slaughter and May lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Whether its emissions are fallingShow a year-on-year fall in its total emissions.
- Its effect on natureMeasure its effect on nature and have it independently verified.
- Its effect on waterMeasure its water footprint and set reduction targets.
Every question that lost points
- Emissions from its own operations8/10No verified figures published with their method and a falling trend.
- Emissions from its supply chain6/10No full value-chain map or supplier engagement programme.
- Whether its emissions are falling4/10No evidence of a year-on-year fall in its total emissions.
- How clean its energy is6/10Less than 90% of its energy shown to be renewable.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste6/10No verified figures for reuse and recycling across the business.
- Its effect on water4/10No measured water footprint with reduction targets.
- Its climate targets8/10No validated long-term net zero target.
- How openly it reports6/10No mission-locked structure, such as B Corp certification.
- Its record on controversies4/10Points deducted for controversies or its business model. The finding is under question 10.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Slaughter and May's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Slaughter and May's score based on?
11 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
45% of them were published by Slaughter and May itself; the rest come from independent sources.
“SCOPE 1 621 tCO2e”
“Accenture has carried out a limited assurance of our Greenhouse Gas emissions figures against the ISO 14064-3”
“We will buy all of our electricity on a green tariff.”
“the firm will now target a 90% absolute reduction of emissions by 2040.”
“achieving an A- rating through the Carbon Disclosure Project”
“Recognised body since 01/11/2011, authorised for all legal services”
“This said that Slaughter and May was responsible for £8.1bn in fossil fuel transactions between 2018 and 2022.”
“while these firms may advertise their sustainability commitments, “the transaction data tells another story””
“The other magic circle firm, Slaughter and May, was not given a score because it is not in the Vault 100.”
“in protest against the magic circle firm’s fossil fuel company clients.”
“The firm acted, for example, in the merger of Premier Oil and Chrysaor which resulted in a new company, Harbour Energy, which is now the largest oil and gas producer in the North Sea.”
If you believe a source has been misread or a newer version exists, submit a challenge.
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How does Slaughter and May compare with other consulting / professional services companies?
Where Slaughter and May sits among consulting / professional services peers.
Among the 30 major consulting / professional services brands we've scored, Slaughter and May sits 3rd of 30.
Who scores higher in Consulting / Professional Services?
The 2 companies in the sector scoring nearest above Slaughter and May.
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See the breakdown →Freshfields has cut operational emissions 80% through renewable electricity purchasing and efficiency, but Scope 3 is rising year-on-year, driven by business travel that the firm says is hard to cut given US growth.
See the breakdown →Which companies moved this week, and why.
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