Proximus sustainability score: 59/100
Leading practice starts at 60. The highest score on SINK is 71.
Proximus is Belgium's largest telecoms operator, headquartered in Brussels; Proximus SA/NV is registered from 1930. It had about 12,900 employees and €6.2 billion revenue in 2025.
Founded 1930Head office Brussels, BelgiumStaff ~12,933 (headcount, 2025)Revenue ~€6.2B (FY2025)Website ↗
Proximus cut its total emissions 15% from 2020 to 2025 and has SBTi-validated targets for net zero by 2040, but in 2024 it replaced its near-term targets with weaker ones and expects to miss its 2030 supply-chain target by 11%. Most of its renewable electricity comes from unbundled certificates. It treats water and biodiversity as not material.
Proximus 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 Proximus joint 19th of 1,023 companies scored, and 2nd of 19 in Telecommunications.
What is Proximus doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Carbon Footprint: Supply Chain (9/10, 8/10). Weakest on Nature & Biodiversity Impact and Water Impact (3/10, 3/10).
Where Proximus 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
- Its effect on natureAssess its effect on nature and publish a basic environmental policy.
- Its effect on waterMonitor its water use and take measures to reduce it.
- Whether its emissions are fallingShow a consistent fall over several years across its operations and supply chain.
Every question that lost points
- Emissions from its own operations9/10No 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 is6/10Less than 90% of its energy shown to be renewable.
- Its effect on nature3/10No assessment of its effect on nature, and no basic environmental policy.
- How it uses materials and handles waste7/10No verified figures for reuse and recycling across the business.
- Its effect on water3/10No monitoring of water use, or no measures to reduce it.
- Its climate targets7/10No 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 Proximus's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Proximus's score based on?
10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
50% of them were published by Proximus itself; the rest come from independent sources.
“Group scope 1 emissions are down by 14% compared to the previous year.”
“We started with the 150 suppliers that have the most emissions.”
“Agristo, Aluminium Duffel, Pfizer Puurs, Proximus and Umicore have subscribed to a total of 70 MW of offshore wind capacity”
“RE100 recognises that Proximus has already met its goal of sourcing 100% of its electricity from renewable sources.”
“reduce absolute Scope 3 GHG emissions by 42% in 2030 from a 2020 base year”
“Proximus commits to reduce its absolute scope 1 and 2 greenhouse gas emissions by 95% by 2030”
“1.2 million mobile phones collected and fixed devices refurbished”
“Proximus was fined 150,000 euro for non-compliance with the rules relating to the identification of end-users”
“Het behaalde een plaats op de Climate A List 2020.”
If you believe a source has been misread or a newer version exists, submit a challenge.
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How does Proximus compare with other telecommunications companies?
Where Proximus sits among telecommunications peers.
Among the 19 major telecommunications brands we've scored, Proximus sits 2nd of 19.
Who scores higher in Telecommunications?
The one company in the sector scoring above Proximus.
See the full Telecommunications table →Which companies moved this week, and why.
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