Comcast sustainability score: 39/100
Making progress starts at 46. The highest score on SINK is 71.
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).
More about Comcast
It had about 179,000 employees and $123.7 billion in FY2025 revenue.
Head office Philadelphia, Pennsylvania, United StatesStaff ~179,000 (FY2025)Revenue $123,707M revenue (FY2025)Website ↗
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. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified October 2026.
That places Comcast joint 451st of 1,023 companies scored, and joint 14th of 19 in Telecommunications.
What is Comcast doing well, and where does it fall short?
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).
Where Comcast 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.
- How clean its energy isShow at least half its energy is renewable, with a transition plan.
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 chain7/10No full value-chain map or supplier engagement programme.
- Whether its emissions are falling7/10No 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 waste4/10No measurable waste or recycling targets reported publicly.
- 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 reports7/10No annual impact report, or no pay linked to climate targets.
- Its record on controversies6/10Points 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 Comcast's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Comcast's score based on?
14 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
29% of them were published by Comcast itself; the rest come from independent sources.
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”
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How does Comcast compare with other telecommunications companies?
Where Comcast sits among telecommunications peers.
Among the 19 major telecommunications brands we've scored, Comcast is tied =14th of 19, with 2 others.
Who scores higher in Telecommunications?
The 3 companies in the sector scoring nearest above Comcast.
Airtel Africa discloses emissions data aligned with GHG Protocol but lacks third-party verification.
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 →Which companies moved this week, and why.
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