Aon PLC
Aon's GHG Emissions Data Preview
In 2024, Aon completed a corporate carbon footprint assessment and publicly disclosed its greenhouse gas (GHG) emissions according to the GHG Protocol, covering Scope 1 (direct emissions from owned or controlled sources), Scope 2 (indirect emissions from purchased energy) and Scope 3 (indirect emissions across the value chain).
However, Aon has not published a category-level breakdown of its Scope 3 emissions, limiting visibility into specific value chain sources.
| Metric (tCO2e) | 2024 | 2023 | 2022 | 2021 - 2017 |
|---|---|---|---|---|
Total Scope 1 | 0000000 | Copy/Paste is a PRO feature.  a | Copy/Paste is a PRO feature.  b | 0000000 |
Total Scope 2 | ||||
Unspecified Calculation Method | Copy/Paste is a PRO feature.  a | 0000000 | Copy/Paste is a PRO feature.  b | 0000000 |
Total Scope 3 | Copy/Paste is a PRO feature.  a | Copy/Paste is a PRO feature.  a | 0000000 | 0000000 |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 0000000 | Copy/Paste is a PRO feature.  a | Copy/Paste is a PRO feature.  b | 0000000 |
Verified Sources Behind Aon’s Greenhouse Gas (GHG) Emissions Data
Every figure on this dashboard has a transparent audit trail. With Tracenable, each data point is traceable back to its original source, viewable directly inside our platform. Explore Aon’s data sources below and access millions more through our Disclosure Search.
Insights into Aon's Operational Emissions
In 2024, the total operational greenhouse gas (GHG) emissions of Aon amounted to 47,022 metric tons of CO2 equivalent. This figure includes both direct emissions from owned or controlled sources (Scope 1) and indirect emissions from purchased energy (Scope 2).a
Compared to 2023, the total operational greenhouse gas (GHG) emissions of Aon decreased by 3.99%, showing that the company has made progress in taking action to reduce the climate impact of its operations.a
Aon's Scope 1 Emissions Over Time
- Total Scope 1
- Year-over-Year Change
What are Aon's Scope 1 emissions?
In 2024, the total Scope 1 emissions of Aon were 15,235 metric tons of CO₂ equivalent (tCO₂e).a
Has Aon reduced its Scope 1 emissions over time?
Since 2019, Aon's Scope 1 emissions have increased by 8.36%, reflecting a rising long-term trend in Scope 1 emissions over time.ab
Compared to the previous year (2023), Aon's Scope 1 emissions decreased by 9.26%, highlighting the company's efforts to lower direct emissions from assets it owns or controls.a
What are Aon's Scope 2 emissions?
In 2024, Aon reported Scope 2 greenhouse gas (GHG) emissions of 31,787 tCO₂e without specifying the calculation method.a
Has Aon reduced its Scope 2 emissions over time?
Since 2019, Aon's Scope 2 greenhouse gas (GHG) emissions (Unspecified Calculation Method) have increased by 42.56%, reflecting a rising long-term trend in Scope 2 emissions over time.ab
Compared to the previous year (2023), Aon's Scope 2 emissions (Unspecified Calculation Method) have remained relatively stable, indicating that Aon's emissions have plateaued with no significant change in its energy consumption footprint.a
What methodology does Aon use for Scope 2 reporting?
In 2024, Aon reported its Scope 2 emissions using an unspecified methodology.a
Aon's Scope 2 Emissions Over Time
- Total Scope 2 (Unspecified Calculation Method)
Insights into Aon's Value Chain Emissions
In 2024, Aon reported 416,183 metric tons of CO₂ equivalent (tCO₂e) of Scope 3 greenhouse gas (GHG) emissions, representing indirect emissions across its upstream and downstream value chain.a
The 2024 disclosure of Aon includes a breakdown across 0 of the 15 Scope 3 categories defined by the GHG Protocol, matching the level of disclosure in 2023, demonstrating consistent Scope 3 emissions reporting coverage year over year.a
Aon's Scope 3 Emissions Over Time
- Total Scope 3
- Year-over-Year Change
What are Aon's Scope 3 emissions?
In 2024, Aon reported total Scope 3 emissions of 416,183 metric tons of CO₂ equivalent (tCO₂e).a
Has Aon reduced its Scope 3 emissions over time?
Since 2019, Aon's Scope 3 emissions have decreased by 17.16%, reflecting a declining long-term trend in Scope 3 emissions over time.ab
Compared to the previous year (2023), Aon's Scope 3 emissions remained relatively stable, indicating that Aon's emissions have plateaued with no significant change in its value chain footprint.a
Insights into Aon’s GHG Emissions Intensity Compared to Industry Peers
In 2024, Aon reported Scope 1 greenhouse gas (GHG) emissions of 15,235 tCO₂e and total revenues of USD 15,698 millions. This translates into an emissions intensity of 0.97 tCO₂e per millions USD.a
Aon's Scope 1 Emissions Intensity Compared to Peers
How does Aon's GHG emissions intensity compare to its peers?
In 2024, Aon reported a Scope 1 emissions intensity of 0.97 tCO₂e per millions USD. Compared to the peer group median of 0.56, this places the company above its industry benchmark, indicating it is less carbon-efficient than most competitors.a
Where does Aon rank on GHG emissions intensity within its industry?
In 2024, Aon ranked 16 out of 23 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
Aon is therefore positioned in the mid-range of its industry, neither a clear leader nor a laggard in carbon efficiency.a
Insights into Aon's Total Carbon Footprint
In 2024, Aon reported a total carbon footprint of 463,205 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 7.18% decrease compared to 2023, indicating progress in reducing its overall greenhouse gas output.a
The largest contributor to Aon's total carbon footprint was Scope 3 emissions, accounting for 89.85% of the company's total carbon footprint, followed by Scope 2 emissions at 6.86%.a