Comcast is a US broadband, media and entertainment company headquartered in Philadelphia.
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Comcast's Scope 1 and 2 emissions are down 41% since 2019 with Deloitte assurance, and it has SBTi-validated near-term targets, but part of its Scope 3 fall comes from changed emission factors rather than physical cuts. Clean electricity is 32.6% of its supply, mostly through certificates. It publishes no group-wide biodiversity or water data, and LobbyMap grades it D+ and records its membership of the Business Roundtable.
Comcast scores 39/100 (Below expectations) 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 Comcast joint 385th of 847 companies scored, and joint 14th of 18 in Telecommunications.
Where Comcast sits among telecommunications peers.
Among the 18 major telecommunications brands we've scored, Comcast is tied =14th of 18, with 2 others.
Its three lowest-scoring questions, and what the evidence didn't show.
No group-wide biodiversity assessment, TNFD disclosure or nature footprint identified.
No group-wide water withdrawal or consumption reported.
The full reasoning is in the ten questions below.
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, 7/10). Weakest on Nature & Biodiversity Impact and Water Impact (3/10, 3/10).
The 3 companies in the sector scoring nearest above Comcast.
Deutsche Telekom has achieved extraordinary operational emissions cuts (94% Scope 1+2 reduction since 2017) and holds SBTi net-zero validation, but Scope 3 reduction velocity is insufficient for its 2030 targets.
See the breakdown →BT Group discloses operational emissions comprehensively with third-party assurance and has achieved 52% absolute Scope 1+2 reduction.
See the breakdown →Three UK lacks entity-level emissions disclosure, relying entirely on parent company CKHGT's group-level data.
See the breakdown →The formula and all 14 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale14 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
10 of 14 sources are independent of the company.
“Scope 1 577 429 413 407”
“we had approximately 179,000 full-time and part-time employees”
“Comcast said total electricity consumption declined by 15% over that period”
“Total energy use across Comcast’s network and business operations fell by 11 percent during that time.”
“Additionally, 535 acres of sensitive wetlands were maintained during construction of the theme park.”
“An independent second-party opinion from S&P Global Ratings confirmed that the framework aligns with the ICMA Green Bond Principles (2021)”
“Comcast refurbishes and recycles equipment, extending the lifecycle of devices and keeping waste out of landfills”
“have resulted in over 75% of waste diverted from landfill”
“We set new near-term science-based greenhouse gas reduction targets for Scopes 1, 2 and 3, which were validated by the Science-Based Targets initiative.”
“Comcast has announced that it will purchase 250 megawatts (MW) of solar electricity from Constellation”
“Comcast is a member of the Business Roundtable , which engages with mixed positions on U.S. climate policy”
“This company received a CDP Climate Change score of D.”
“Comcast is a member of the U.S. Chamber of Commerce, which has long and consistently lobbied to constrain U.S. climate regulations”
If you believe a source has been misread or a newer version exists, submit a challenge.
Comcast is a US broadband, media and entertainment company headquartered in Philadelphia. It runs Xfinity broadband and TV services and owns NBCUniversal (film, television and theme parks) and Sky (European pay-TV). It had about 179,000 employees and $123.7 billion in FY2025 revenue.
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