Proximus is Belgium's largest telecoms operator, headquartered in Brussels; Proximus SA/NV is registered from 1930.
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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. Fees pay for the review, never the result. Last verified October 2026.
That places Proximus joint 19th of 883 companies scored, and 2nd of 20 in Telecommunications.
Where Proximus sits among telecommunications peers.
Among the 20 major telecommunications brands we've scored, Proximus sits 2nd of 20.
Its three lowest-scoring questions, and what the evidence didn't show.
No published biodiversity footprint, TNFD disclosure, or site-level nature assessment.
No water withdrawal or consumption data published.
2025 decline attributed to lower purchase volumes and April 2025 data centre sale, not decarbonisation.
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 Carbon Footprint — Supply Chain (9/10, 8/10). Weakest on Nature & Biodiversity Impact and Water Impact (3/10, 3/10).
The one company in the sector scoring above Proximus.
See the full Telecommunications table →The formula and all 10 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
“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.”
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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.
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