Slaughter and May is a Magic Circle law firm headquartered in London, with offices across major financial centres including Brussels.
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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. Fees pay for the review, never the result. Last verified October 2026.
That places Slaughter and May joint 17th of 847 companies scored, and joint 2nd of 16 in Consulting / Professional Services.
Where Slaughter and May sits among consulting / professional services peers.
Among the 16 major consulting / professional services brands we've scored, Slaughter and May is tied =2nd of 16, with 1 other.
Its three lowest-scoring questions, and what the evidence didn't show.
Firm cannot report like-for-like progress until re-baselining completes.
Office-based firm with limited direct nature exposure.
No water consumption figures or reduction data reported in 2025 sustainability report or Carbon Reduction Plans.
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 Emissions Trajectory and Nature & Biodiversity Impact (4/10, 4/10).
The one company in the sector scoring above Slaughter and May.
See the full Consulting / Professional Services table →The formula and all 11 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale11 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
“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.
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. As a partnership, it does not publish revenue.
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