Marsh & McLennan Companies Inc
Marsh & McLennan Companies's GHG Emissions Data Preview
In 2024, Marsh & McLennan Companies 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).
Marsh & McLennan Companies has also provided a category-level breakdown for 10 out of 15 Scope 3 emissions categories, offering greater transparency into its value chain emissions.
| 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 | ||||
Market-Based | Copy/Paste is a PRO feature.  a | 0000000 | Copy/Paste is a PRO feature.  b | 0000000 |
Location-Based | 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 |
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aVerified Sources Behind Marsh & McLennan Companies’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 Marsh & McLennan Companies’s data sources below and access millions more through our Disclosure Search.
Insights into Marsh & McLennan Companies's Operational Emissions
In 2024, the total operational greenhouse gas (GHG) emissions of Marsh & McLennan Companies amounted to 77,390 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 Marsh & McLennan Companies decreased by 16.29%, showing that the company has made progress in taking action to reduce the climate impact of its operations.a
Marsh & McLennan Companies's Scope 1 Emissions Over Time
- Total Scope 1
- Year-over-Year Change
What are Marsh & McLennan Companies's Scope 1 emissions?
In 2024, the total Scope 1 emissions of Marsh & McLennan Companies were 18,865 metric tons of CO₂ equivalent (tCO₂e).a
Has Marsh & McLennan Companies reduced its Scope 1 emissions over time?
Since 2019, Marsh & McLennan Companies's Scope 1 emissions have decreased by 23.8%, reflecting a declining long-term trend in Scope 1 emissions over time.a
Compared to the previous year (2023), Marsh & McLennan Companies's Scope 1 emissions decreased by 20.19%, highlighting the company's efforts to lower direct emissions from assets it owns or controls.a
What are Marsh & McLennan Companies's Scope 2 emissions?
In 2024, Marsh & McLennan Companies reported Scope 2 greenhouse gas (GHG) emissions of 16,038 tCO₂e using the market-based method and 58,525 tCO₂e using the location-based method.a
Has Marsh & McLennan Companies reduced its Scope 2 emissions over time?
Since 2019, Marsh & McLennan Companies's Scope 2 greenhouse gas (GHG) emissions (Location-Based) have decreased by 30.33%, reflecting a declining long-term trend in Scope 2 emissions over time.a
Compared to the previous year (2023), Marsh & McLennan Companies's Scope 2 emissions (Location-Based) fell by 14.95% in 2024, showing that the company has made progress in taking action to reduce the climate impact of its energy consumption.a
What methodology does Marsh & McLennan Companies use for Scope 2 reporting?
In 2024, Marsh & McLennan Companies reported its Scope 2 emissions using the market-based method and using the location-based method.a
Marsh & McLennan Companies's Scope 2 Emissions Over Time
- Total Scope 2 Location-Based
- Total Scope 2 Market-Based
Insights into Marsh & McLennan Companies's Value Chain Emissions
In 2024, Marsh & McLennan Companies reported 662,042 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 Marsh & McLennan Companies includes a breakdown across 10 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
Marsh & McLennan Companies's Scope 3 Emissions Over Time
- Total Scope 3
- Year-over-Year Change
What are Marsh & McLennan Companies's Scope 3 emissions?
In 2024, Marsh & McLennan Companies reported total Scope 3 emissions of 662,042 metric tons of CO₂ equivalent (tCO₂e).a
Approximately 99.52% of these emissions originated from upstream activities such as purchased goods and capital goods, while 0.48% came from downstream activities like product use, distribution, and end-of-life treatment.a
Has Marsh & McLennan Companies reduced its Scope 3 emissions over time?
Since 2019, Marsh & McLennan Companies's Scope 3 emissions have increased by 31.7%, reflecting a rising long-term trend in Scope 3 emissions over time.a
Compared to the previous year (2023), Marsh & McLennan Companies's Scope 3 emissions increased by 32.92%, suggesting that the company faced challenges in reducing emissions across its value chain.a
What categories of Scope 3 emissions does Marsh & McLennan Companies disclose?
In 2024, Marsh & McLennan Companies reported emissions for 10 out of the 15 Scope 3 categories defined by the GHG Protocol.a
This reflects a high level of granularity and transparency in the company's emissions reporting.
What are the main sources of Marsh & McLennan Companies's Scope 3 emissions?
In 2024, the largest contributors to Marsh & McLennan Companies's Scope 3 emissions were:a
- Purchased Goods and Services (Cat. 1): 388,730 tCO₂e (58.72%)
- Business Travel (Cat. 6): 109,904 tCO₂e (16.6%)
- Employee Commuting (Cat. 7): 74,769 tCO₂e (11.29%)
Marsh & McLennan Companies's Scope 3 Emissions by Categories
Insights into Marsh & McLennan Companies’s GHG Emissions Intensity Compared to Industry Peers
In 2024, Marsh & McLennan Companies reported Scope 1 greenhouse gas (GHG) emissions of 18,865 tCO₂e and total revenues of USD 24,459 millions. This translates into an emissions intensity of 0.77 tCO₂e per millions USD.a
Marsh & McLennan Companies's Scope 1 Emissions Intensity Compared to Peers
How does Marsh & McLennan Companies's GHG emissions intensity compare to its peers?
In 2024, Marsh & McLennan Companies reported a Scope 1 emissions intensity of 0.77 tCO₂e per millions USD. Compared to the peer group median of 0.3, this places the company above its industry benchmark, indicating it is less carbon-efficient than most competitors.a
Where does Marsh & McLennan Companies rank on GHG emissions intensity within its industry?
In 2024, Marsh & McLennan Companies ranked 19 out of 25 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
Marsh & McLennan Companies is therefore positioned in the mid-range of its industry, neither a clear leader nor a laggard in carbon efficiency.a
Insights into Marsh & McLennan Companies's Total Carbon Footprint
In 2024, Marsh & McLennan Companies reported a total carbon footprint of 739,432 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 25.22% increase compared to 2023, suggesting a rise in emissions across its operations or value chain.a
The largest contributor to Marsh & McLennan Companies's total carbon footprint was Scope 3 emissions, accounting for 89.53% of the company's total carbon footprint, followed by Scope 2 emissions at 7.91%.a