Siemens sustainability score: 35/100
Siemens is a German technology group headquartered in Munich. Smart infrastructure for buildings and power grids is 29% of its revenue and factory automation 23%, together over half; Siemens Healthineers, its medical technology business, is 30% and rail equipment 16%.
More about Siemens
It had about 318,000 employees and €78.9 billion revenue in its 2025 financial year, to September.
Head office Munich, GermanyStaff ~318,000 (30 Sep 2025)Revenue ~€78.9B (FY2025, to 30 Sep)Website ↗
Siemens has cut its own emissions 62% since 2019, but 84% of its 159.5 MtCO2e footprint is the modelled lifetime electricity use of the products it sells, and none of its supply-chain figures use measured data. Its net-zero targets are SBTi-validated, though it says its supply-chain target is in line only with well below 2°C, not 1.5°C. 86% of its electricity is renewable, but unbundled certificates cover more of its energy than direct contracts, and it told investors some of its trade associations do not fully reflect its climate policy.
Siemens scores 35/100 (Below expectations) on SINK's independent climate assessment, scored from public data only. Scores are free. Companies can never pay for anything about their own score. Last verified October 2026.
That places Siemens joint 540th of 934 companies scored, and joint 7th of 12 in Electrical Equipment / Lighting.
What is Siemens 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, 5/10).
Where Siemens lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations8/10No verified figures published with their method and a falling trend.
- Emissions from its supply chain7/10No 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 nature5/10Its 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 water5/10No measured water footprint with reduction targets.
- Its climate targets8/10No validated long-term net zero target.
- How openly it reports8/10No mission-locked structure, such as B Corp certification.
- Its record on controversies7/10Points 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 Siemens's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas Siemens's score changed?
Siemens's score has moved from 56 to 35 across 2 recorded reviews, down 21 points.
- 56 → 35-2129 October 2026
Re-scored under the current methodology (v2.5); owner ruling 2026-10-29. History gap: the last recorded row is 56 (2026-04-09, initial_score), but the live score before this change was 35 (previousScore 56). The intermediate change(s) were not recorded at the time and are not reconstructed here.
- Scored 569 April 2026
Initial score at platform launch
What evidence is Siemens's score based on?
10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
20% of them were published by Siemens itself; the rest come from independent sources.
84% of Siemens's reported footprint (134.1 of 159.5 MtCO2e in 2025) is modelled: the electricity its products are expected to use over their lifetimes, worked out from assumed operating hours, power demand and lifetime with IEA grid factors. We use the reported total, as we do for the use-phase emissions of oil and car makers. How to treat use-phase emissions for products that enable clean energy is on our list for the next methodology review.
“Since fiscal 2019, we have reduced Scope 1 & 2 emissions by 62%”
“Siemens itself has reduced its operating emissions by 66 percent since 2019.”
“Siemens also cut its own operational emissions by 66% compared to 2019”
“the company counts the full electricity used by its motors and drives over their lifetime”
“source 100% renewable power”
“In 2025, the company increased the implementation rate of its conservation programme at all of its relevant sites from 18% to 55%”
“Reduce absolute Scope 3 greenhouse-gas emissions by 30 percent by fiscal 2030 compared to the fiscal 2019 baseline”
“This is higher than the 121 million tons of emissions the company generated along its entire value chain (Scope 1, 2 and 3) in fiscal 2024”
“Siemens Mobility, which is working on the rail signalling infrastructure for the climate-wrecking coal project”
“In 2025, Siemens once again achieved an “A” rating from CDP”
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How does Siemens compare with other electrical equipment / lighting companies?
Where Siemens sits among electrical equipment / lighting peers.
Among the 12 major electrical equipment / lighting brands we've scored, Siemens is tied =7th of 12, with 2 others.
Who scores higher in Electrical Equipment / Lighting?
The 3 companies in the sector scoring nearest above Siemens.
Signify's reported footprint fell 61% from 2019 to 165 MtCO2e in 2025, but 99.5% of it is the modelled lifetime electricity use of the lamps it sells, so much of the fall comes from cleaner grids and more efficient LEDs.
See the breakdown →Schneider Electric's reported footprint is 60.7 MtCO2e, 79% of it the modelled lifetime electricity use of the products it sells, and it fell only 0.8% in 2025.
See the breakdown →Nexans has cut its own emissions 49% since 2019 and has SBTi-validated 1.5°C and net-zero targets.
See the breakdown →Which companies moved this week, and why.
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