Aon — full event log

Aon published a March 31, 2025 document mapping its insurance, risk, human capital, and ESG solutions to each of the 17 UN SDGs, including poverty, gender equality, climate action, and partnerships.

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Aon positions itself as a partner to clients on ESG and climate transition, offering risk and insurance-based solutions including supply chain resilience, climate risk/catastrophe insight, and ESG value proposition support via its Professional Services Practice. Aon aims to mobilize private-sector capital and drive collaboration with governments, academia, and businesses on climate solutions.

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Aon has moved its operations in many major cities into newer office buildings that consume less energy and water and are certified by the LEED Green Building Program or other internationally recognized ranking programs. This is positioned under SDG 6 (Clean Water and Sanitation) as part of its environmental impact strategy.

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Under SDG 17, Aon references its commitment to reaching net-zero emissions in its own operations (scopes 1 & 2), framed as part of partnerships for the goals.

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Aon's National Power & Energy Practice delivers specialist risk solutions to utility companies, independent power producers, renewable energy developers, grid and distribution operators, private equity and infrastructure groups across the energy mix — supporting SDG 7 (Affordable and Clean Energy).

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Continuing sustainable sourcing strategy, enabled by Aon Business Services platform, working closely with suppliers to understand and influence their existing carbon reduction commitments and strategies. Centralized purchasing through Aon Business Services seeks to engage and support suppliers on their own sustainability journey.

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Aon has moved from ownership to leasing of hardware through third-party partners, which enables end-of-life recycling for printers, print cartridges and laptops. Office products are increasingly refurbished to reduce waste, and Aon donates to local communities to extend the life cycle of materials and products.

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Aon's acquisition of NFP on April 25, 2024 resulted in a 5% material change in the company's emissions inventory, which meets the threshold for recalculation.

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Updates to CEDA and US EEIO spend-based emission factor databases in 2024 with more accurate economic and emissions data. Aon uses the newest CEDA database for its 2024 emission calculations.

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Aon's management team has established a Net-Zero Committee to develop short, medium and long-term strategies to support firm sustainability and the commitment to net-zero from own operations (Scope 1 and Scope 2) by 2030. Jointly sponsored and chaired by chief procurement officer and head of strategic finance and corporate sustainability.

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Aon is committed to achieving net-zero greenhouse gas emissions for our own operations (Scope 1 and Scope 2) by 2030.

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Aon continues to expand its use of renewable energy and is at 48% kWh usage for Aon's real estate footprint (excluding NFP) as of 2024. Strategy focuses on driving energy efficiency across the real estate portfolio and technology, including renewables, supported by facilities optimization projects such as LED lighting upgrades and HVAC system improvements.

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Aon has achieved ISO 14001 environmental management certification and ISO 45001 occupational health and safety certification for larger office buildings in India (Gurgaon, Noida, Bengaluru, Mumbai).

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Aon has undertaken a physical and transition risk analysis of operations, which includes the operational footprint of NFP (acquired in 2024).

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Aon thoughtfully approaches its travel and commuting footprint. The Smart Working model enables flexible working arrangements (remote, in-office, client office, or combination), supported by investment in virtual technology. This allows clients to reduce their own footprints with more thoughtful decisions on travel.

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Reducing the impact of real estate footprint by reducing space used and improving energy efficiency across real estate portfolio and technology. Hundreds of facilities optimization projects undertaken including LED lighting upgrades, utility capacity optimization, and upgrading of heating and cooling systems. Moves to newer, more energy-efficient buildings (e.g., new Dublin office) including LEED-certified buildings.

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From 2022 to 2023 Aon revised its methodology. The figures presented for 2022 and 2023 are calculated using this revised methodology. Per the GHG Protocol, Aon rebaselines calculations in the event of a change in methodology that would result in a 5% or greater change in base year emissions.

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In 2023, Aon enhanced certain Enterprise Risk Management (ERM) definitions to further address ESG and climate-related risks.

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Aon remains committed to achieving net-zero carbon emissions by 2030, managed through travel, commuting, real estate, investments and supply chain.

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Aon controls its direct operations emissions through thoughtful travel and its Smart Working strategy. The firm invests in innovative solutions such as a Sustainable Aviation Fuel (SAF) pilot program to reduce the impact of air travel emissions, which is one of its dominant Scope 3 categories.

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Smart Working — offering home, office or hybrid working — is positioned as both an engagement lever and a way to manage commuting-related emissions. The firm cites commuting as one of the key drivers of its total footprint.

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Aon has implemented a Global Energy Program in partnership with JLL to capture Scope 1 and 2 utility data across all buildings and manage energy consumption through a single global reporting platform. A benchmarking exercise identified 'Priority Locations' where Energy Usage Intensity exceeds best practice; formal action plans are underway. Initiatives include LED lighting upgrades across global offices, consumption deviation investigation and resolution, and energy/environmental 'Good Catches' by FM teams. Aon also procures 100% renewable electricity where available in deregulated utility markets.

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Aon re-baselined its carbon emissions inventory to fiscal 2023 driven by NFP acquisition and methodology updates including new CEDA emission factor database for 2024 calculations.

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Revised methodology for Scope 3 Cat 1 (purchased goods), used radiative forcing factors for Cat 6 (business travel), updated Cat 7 (commuting/WFH), included primary emissions, and adjusted real-estate portfolio to Scopes 1 and 2 from Scope 3.

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Aon purchased a SAF volume of 48,000 gallons in 2022; fuel was consumed in October 2023. Part of collaboration with Amex GBT & Shell. Resulted in 403.378 tCO2 biogenic emissions with 74.72% GHG reduction vs. fossil jet fuel comparator.

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Aon has adopted a centralized approach to procurement of utilities in deregulated markets, with a key component being to procure 100% renewable electricity where possible/available. In 2023, Aon purchased renewable energy equivalent to 7,608 tCO2e (its first year of renewable purchases), sourcing wind energy via project-specific contracts in Italy, Australia, Spain, Netherlands, India, Denmark, UK, and Germany, and a retail green electricity contract in New Zealand. Renewable electricity represents approximately 34% of total electricity consumed (29,223 MWh of 85,738 MWh total). The market-based Scope 2 figure (24,099 tCO2e) is lower than location-based (30,714 tCO2e) reflecting these renewable energy attributes.

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Business travel (Scope 3 Cat 6) is the dominant operational emissions source at 70,859 tCO2e in FY2023, up significantly from the 2019 base of 41,111 tCO2e as travel resumed post-COVID. Aon's Environmental Policy explicitly calls for 'thoughtfully approaching business travel and enabling Smart Working alternatives for colleagues.' Aon uses flight distance-based calculation (DEFRA EFs by haul class) and hotel nights for inventory. The SAF purchase in collaboration with Amex GBT and Shell represents a direct intervention in Scope 3 Cat 6.

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Employee commuting (Scope 3 Cat 7) totalled 41,528 tCO2e in FY2023, calculated using distance-based methods with government commute mix data. The methodology separately estimates commute emissions by transport mode and remote working home office energy use (electricity and natural gas per 150 sq ft home office). Aon has institutionalized 'Smart Working' alternatives to reduce commuting, consistent with its net-zero transition plan. Remote work electricity is tracked using market-based emission factors.

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In 2023, Aon purchased renewable energy equivalent to 7,608 tCO2e for the first time (vs. 0 in 2022). This represented a 15.25% reduction in combined Scope 1+2 market-based emissions vs. prior year. Wind energy PPAs/contracts established across Italy, New Zealand, Australia, Spain, Netherlands, India, Denmark, UK, Germany.

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Aon has stated it intends to neutralize any residual emissions with permanent carbon removals at the end of its net-zero target (12/31/2030). As a first step, Aon purchased the environmental attributes of more than 40,000 gallons of Sustainable Aviation Fuel (SAF) in collaboration with Amex GBT and Shell, achieving a 74.72% GHG reduction compared to fossil jet fuel. The SAF volume was consumed in October 2023, generating 403.378 tCO2 in biogenic carbon. The firm has not yet specified which permanent carbon removal technologies (e.g. DAC, BECCS) it will use for residual neutralization.

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Aon has converted its Netherlands fleet to only hybrid or electrical vehicles and has several projected changes from fossil fuel to electric to minimize fleet emissions globally. Fleet combustion is captured as Scope 1 mobile combustion (15,490 tCO2e of the 22,583 tCO2e total Scope 1 in FY2023). Fleet electrification is a near-term lever to reduce this dominant Scope 1 source.

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Aon has an SBTi-approved absolute emissions reduction target (Abs1) covering Scope 1, 2 (market-based), and all Scope 3 categories. Target: 55% reduction from 2019 base year by 12/31/2030. Total base year emissions = 542,846 tCO2e. Target end-state = 244,280.7 tCO2e. As of FY2023, 166.18% of target achieved relative to base year (Scope 1+2 only = 46,682 tCO2e vs. 36,762 tCO2e required).

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Aon confirmed no structural changes, methodology changes, or boundary changes occurred in the reporting year 2023. Methodology unchanged from prior year.

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Purchased goods and services (Cat 1) is the largest Scope 3 category at 235,406 tCO2e in FY2023. Aon has launched a Sustainable Procurement capability with Aon Business Services, deploying supplier sustainability assessments, requiring 76-99% of tier 1 suppliers by spend to set science-based emissions reduction targets (with only 1-25% currently compliant). Aon leverages the CDP Supply Chain module to engage its Top 180 suppliers by spend, collecting GHG data annually. Supplier-specific revenue intensity factors are used where available (15.28% of Cat 1 emissions calculated from supplier data).

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Aon manages Scope 3 emissions through its supplier sustainability strategy, with centralised purchasing through Aon Business Services enabling ESG goals. Aon also deploys a Supplier Risk Dashboard to help identify ESG-related supply chain risks.

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New global Sustainability Network where climate-focused ideas and actions are shared and amplified across the firm.

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Aon is reducing the space it uses and improving energy efficiency across its real estate portfolio and technology, enabled by its Aon Business Services operational platform and its flexible Smart Working strategy (home/hybrid/office).

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In 2021, Aon committed to achieving net-zero greenhouse gas emissions by 2030, joining the global effort to manage the effects of climate change. Subsequently set SBTi-validated targets in line with 1.5°C pathway.

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