Johnson Matthey sustainability score: 42/100
Making progress starts at 46. The highest score on SINK is 71.
Johnson Matthey makes catalysts that clean vehicle exhaust, and refines, recycles and supplies platinum group metals. Its Clean Air business made £2,123 million of its £2,555 million sales excluding precious metals from continuing operations in the year to 31 March 2026.
More about Johnson Matthey
Johnson Matthey Plc was incorporated in 1891. Its 9,491 employees at 31 March 2026 and £13,120 million revenue including precious metals for 2025/26 include the Catalyst Technologies business, which it sold to Honeywell in July 2026.
Founded 1891Head office Royston, United KingdomStaff ~9,491 headcount (31 March 2026, includes Catalyst Technologies)Revenue ~£13.12B revenue incl. precious metals (2025/26, includes Catalyst Technologies); £2,555M sales excl. precious metals, continuing operationsWebsite ↗
Johnson Matthey's footprint was 3,456,745 tCO2e in 2025/26, mostly in the goods it buys, and 62% of those emissions are attributed to precious metal mining. That is down from 3,698,956 t the year before, with limited assurance from ERM. 68% of its electricity is certified renewable, through green tariffs and certificates, but natural gas is 59% of its energy use. It says SBTi validated its targets, including net zero by 2040; by 2030 it now targets a 65% cut in Scope 1 and 2 emissions, and a 33% cut in emissions from purchased goods, from 2019/20. Recycled content in its platinum group metals was 73%, but waste sent off site rose 10%.
Johnson Matthey scores 42/100 (Below expectations) 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 November 2026.
That places Johnson Matthey joint 370th of 1,043 companies scored, and 7th of 18 in Chemicals.
What is Johnson Matthey doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Carbon Footprint: Supply Chain (8/10, 8/10). Weakest on Energy Source and Nature & Biodiversity Impact (2/10, 4/10).
Where Johnson Matthey 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
- How clean its energy isMove to a renewable energy tariff or make a major efficiency investment.
- Its effect on natureMeasure its effect on nature and have it independently verified.
- How it uses materials and handles wasteReport measurable waste or recycling targets publicly.
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 chain8/10Its Scope 3 emissions aren't fully verified or falling year on year.
- Whether its emissions are falling6/10No consistent fall over several years across its operations and supply chain.
- How clean its energy is2/10No renewable energy tariff or major efficiency investment shown.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste5/10No measurable waste or recycling targets reported publicly.
- Its effect on water6/10No water stewardship programme or verified fall in water use.
- Its climate targets8/10No validated long-term net zero target.
- How openly it reports8/10No mission-locked structure, such as B Corp certification.
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 Johnson Matthey's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Johnson Matthey's score based on?
12 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
42% of them were published by Johnson Matthey itself; the rest come from independent sources.
7 of 12 sources are independent of the company.
“Total Scope 1 GHG emissions tonnes CO2e 217,951 225,330 215,647 215,166 226,341 229,150 227,933”
“ERM Certification and Verification Services Limited (“ERM CVS”) was engaged by Johnson Matthey plc”
“Unless otherwise stated, the non-financial information in this report includes the Catalysts Technologies (CT) business.”
“implement biodiversity protection plans at local sites”
“SBTi has classified JM’s Scope 1 and 2 near-term target ambition and has determined it is in line with the 1.5°C trajectory.”
“said in May that it would be net zero by 2040”
“Sales excluding precious metals 2,555 2,831”
“Johnson Matthey Inc. was sentenced to a $3 million criminal fine for a felony violation of the Clean Water Act”
“Johnson Matthey, Inc. will pay $50,000.00 in penalties for violating air quality regulations”
“Penalty : $6,000”
“Pollution to the atmosphere (making it noxious or offensive to the senses of human beings)”
“driven by an 8% sales decline at the larger Clean Air Solutions business”
If you believe a source has been misread or a newer version exists, submit a challenge.
Is this your company? Claim this profile (free)
Use this score in tenders
Send the link, or the one-page score sheet. It links back to this page and every source. Free.
Open the score sheet →Send new evidence, free
Scored low because little is published? Publish what you do and send us the link, free. If it holds up, your score changes, and the change is logged on your page.
How to send evidence →Put your score on your website, free
It shows the current band, sector rank and score, and links to this page, so it changes when the score does.
Track this score
Bidding for a public contract? Check if you need a Carbon Reduction Plan, free →
Want your own page like this?
Free, independent, every source shown. Send it to any buyer who asks about your sustainability.
How does Johnson Matthey compare with other chemicals companies?
Where Johnson Matthey sits among chemicals peers.
Among the 18 major chemicals brands we've scored, Johnson Matthey sits 7th of 18.
Who scores higher in Chemicals?
The 3 companies in the sector scoring nearest above Johnson Matthey.
Croda has achieved long-term emissions reductions and secured SBTi validation for aggressive near-term targets, but recent year-on-year data shows Scope 1 rising and downstream emissions climbing.
See the breakdown →MANE's absolute emissions rose in 2025, its total up 3.9% to 917,000 tCO2e, and all its reported progress is per tonne of product.
See the breakdown →Givaudan has halved its own emissions since 2015 and has SBTi-validated net-zero targets, but its supply-chain emissions are still 4% above their 2020 baseline.
See the breakdown →Which companies moved this week, and why.
One email, every Sunday. Score changes, new research, the stories behind the numbers. Free.
We'll send one email to confirm. No spam. Unsubscribe in one click.
Checking a company?
Search free →Asked to prove you're sustainable?
Get your business scored, free →Been scored?
Find your page and claim it, free →Scores are free. Nobody can pay to change a score, speed it up or hide it.