CyrusOne sustainability score: 40/100
CyrusOne owns, develops and runs data centres, renting colocation space to customers who also reimburse it for metered power. Its last public figures, for 2021, show $924.1 million colocation rent and $259.0 million metered power reimbursements within US$1,205.7M revenue.
More about CyrusOne
CyrusOne Inc. was formed in Maryland in 2012; its roots go back to 2001. It has been private since March 2022, after the acquisition its last annual report names as KKR and GIP, and had 832 employees at 30 September 2025.
Founded 2012Head office Dallas, United StatesStaff ~832 (30 September 2025, 2026 Sustainability Report p. 53 and assurance statement)Revenue ~US$1,205.7M (FY2021, last public figure; private since March 2022)Website ↗
CyrusOne reported 1,259,286 tCO2e across Scopes 1, 2 and 3 in 2025, up from 896,893 t in 2024, with Scope 3 up 71% on construction and the last three months of 2025 projected. It reports 77.8% of its electricity as carbon-free: 52.9% customer-procured renewables with instruments undisclosed, 19.4% its own renewable procurement with contract types not split, 5.4% nuclear documented by certificates and 0.1% unbundled certificates. SBTi lists a 38% Scope 1 and 2 cut by 2030, with no quantified Scope 3 target. New Texas campuses are being built next to gas plants. About 78% of its water withdrawal is in high-stress regions. No fine or regulator finding was found.
CyrusOne scores 40/100 (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 November 2026.
That places CyrusOne joint 423rd of 994 companies scored, and joint 21st of 39 in Construction / Real Estate.
What is CyrusOne doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Carbon Footprint: Supply Chain (8/10, 7/10). Weakest on Emissions Trajectory and Energy Source (0/10, 4/10).
Where CyrusOne 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 falling0/10No evidence its emissions are falling, not even from energy bills or mileage.
- How clean its energy is4/10Less than half its energy shown to be renewable, or no transition plan.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- 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 targets7/10Its targets aren't validated by the Science Based Targets initiative.
- 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 CyrusOne's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is CyrusOne's score based on?
12 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
8% of them were published by CyrusOne itself; the rest come from independent sources.
Scope 2, 2025: market-based 419,625 t, location-based 1,989,670 t. The score uses market-based.
11 of 12 sources are independent of the company.
“Total Scope 2 Market-Based 619,477 586,954 395,346 419,625”
“reduce scope 1 and scope 2 GHG emissions 38% by 2030 from a 2021 base year, and to measure and reduce its scope 3 emissions”
“colocating next to an existing natural gas power plant”
“the data centers will be powered by the Freestone Energy Campus 1GW natural gas-fired combined-cycle facility”
“citing concerns about the data center’s environmental impact, proximity to residential neighborhoods”
“take prime farm ground out of production, disrupt the environment”
“voted 17-10 to approve a data center development on 280 acres of farmland”
“Concerns ranged from pollution and taking farmland out of production to drain on resources”
“Major concerns raised by the organizers centered on environmental risks from data centers, such as water overconsumption, increased flooding risks and noise pollution.”
“formerly: CyrusOne Inc. (filings through 2022-04-14)”
“Three of its facilities (Chandler, Arizona; Carrollton, Texas; and Allen, Texas) as well the company headquarters are now net water positive”
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How does CyrusOne compare with other construction / real estate companies?
Where CyrusOne sits among construction / real estate peers.
Among the 39 major construction / real estate brands we've scored, CyrusOne is tied =21st of 39, with 4 others.
Who scores higher in Construction / Real Estate?
The 3 companies in the sector scoring nearest above CyrusOne.
Taylor Wimpey has strong climate targets (SBTi-validated, net zero by 2045) and operational carbon reporting, but supply chain emissions remain 99% of its footprint with only modest reductions.
See the breakdown →British Land discloses comprehensively on carbon and energy, with SBTi-validated absolute Scope 1&2 targets and near-100% renewable procurement.
See the breakdown →Digital Realty reported 1,935,624 tCO2e across Scopes 1, 2 and 3 in 2025, down from 2,849,402 t in 2023, which its report puts mainly down to renewable procurement.
See the breakdown →Which companies moved this week, and why.
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