Siltronic sustainability score: 43/100
Siltronic is a German maker of silicon wafers for the semiconductor industry, headquartered in Munich. 35 billion sales in 2025.
Head office Munich, GermanyStaff ~4,249 (2025)Revenue ~€1.35B (FY2025)Website ↗
Siltronic's total footprint fell to 2.7 MtCO2e in 2025 and its own market-based emissions are 31% below 2021, but the cut comes from buying certificates while its energy use rises. Only 26% of its electricity is renewable under RE100 criteria. In 2023 it dropped its plan to have its targets validated by SBTi, and it has no target for its value-chain emissions.
Siltronic scores 43/100 (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 Siltronic joint 322nd of 900 companies scored, and joint 13th of 39 in Electronics / Hardware.
What is Siltronic doing well, and where does it fall short?
Strongest on Carbon Footprint — Operations and Transparency & Accountability (8/10, 8/10). Weakest on Nature & Biodiversity Impact and Energy Source (3/10, 4/10).
Where Siltronic 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 falling6/10No consistent fall over several years across its operations and supply chain.
- How clean its energy is4/10Less than half its energy shown to be renewable, or no transition plan.
- Its effect on nature3/10No assessment of its effect on nature, and no basic environmental policy.
- 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 targets4/10Its targets aren't science-based or committed to the Science Based Targets initiative.
- 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 Siltronic's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Siltronic'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 Siltronic itself; the rest come from independent sources.
“Market-based Scope 2 emissions amounted to 210,477 t CO2eq in the reporting year, a decrease of 6.1 percent compared to the previous year.”
“We record these emissions in our Group-wide CO 2 balance sheet in accordance with the requirements of the Greenhouse Gas Protocol.”
“The company will intensify its cooperation with suppliers in this regard in the future.”
“these greenhouse gas emissions are to be reduced by 42% by 2030 compared to the base year 2021.”
“Under the 10-year agreement, Axpo will procure 60 GWh of renewable energy annually from photovoltaic (PV) plants in Germany”
“This enables Siltronic to cover nearly one-fifth of its electricity demand in Germany”
“In 2009, NW Natural and Siltronic Corporation entered into a separate Administrative Order on Consent with the EPA”
“removed Siltronic Corporation as a Respondent to the 2009 ASAOC”
“Registernummer: R006189”
“Die Siltronic AG unterstützt gemeinsam mit 59 weiteren”
“received the highest rating of "A-Leadership" from CDP in the climate protection and water security categories for 2025”
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How does Siltronic compare with other electronics / hardware companies?
Where Siltronic sits among electronics / hardware peers.
Among the 39 major electronics / hardware brands we've scored, Siltronic is tied =13th of 39, with 1 other.
Who scores higher in Electronics / Hardware?
The 3 companies in the sector scoring nearest above Siltronic.
Cisco has achieved genuine absolute emissions reductions across all scopes with SBTi-validated net-zero 2040 targets and 96–100% renewable electricity.
See the breakdown →First Solar's Scope 1 and 2 emissions are 57% above 2020 despite its net-zero targets, though its total footprint fell in 2025; Scope 1 jumped 35% year-on-year in 2025.
See the breakdown →Arm reports rising absolute emissions across two consecutive years despite operational cuts, driven by expansion into production silicon.
See the breakdown →Which companies moved this week, and why.
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