Carbon per million dollars of revenue. The legacy industry-standard reference (CDP, MSCI). Useful for cross-sector context, but distorted by margin — high-margin firms appear artificially efficient. Read alongside the operational and asset intensities for the full picture.

Bottom quartile

better than 20% of peers

best 5.35n=17 peersworst 191

Operational intensity

Carbon / $m OpEx

46.6tCO2e / $m

OpEx (operating expenditure) is the running cost of the business — staff, services, energy, materials. This shows how carbon-intensive operations are per million dollars of spend. Removes the margin distortion that revenue-based ratios introduce.

Bottom quartile

better than 22% of peers

best 8.27n=15 peersworst 197

Economic intensity

Carbon / $m EVIC

6.27tCO2e / $m

EVIC (Enterprise Value Including Cash) is the firm's total capital footprint — equity + debt + cash + minority interest. The EU's standard intensity measure (SFDR PAI 3) — answers: how much carbon does each million of capital deployed in this business produce?

Below median

better than 45% of peers

best 2.53n=8 peersworst 268

Asset intensity

Carbon / $m PP&E + leased

222tCO2e / $m

PP&E (Property, Plant & Equipment) plus leased real-estate assets is the firm's physical infrastructure on the balance sheet. This shows the carbon intensity of that physical footprint — uses Scope 1+2+3 for consistency with the other headline intensities. Surfaces stranded-asset risk for asset-heavy firms.

Below median

better than 45% of peers

best 27.9n=15 peersworst 14.8k

Workforce intensity

Carbon / FTE

0.93tCO2e / FTE

Carbon per FTE (full-time-equivalent employee) — the diagnostic measure for people-leveraged businesses where headcount, not capital, drives delivery. Captures the office, energy and travel footprint per person.

Bottom quartile

better than 9% of peers

best 0.01n=19 peersworst 3.22

Targets

Near-term

2 targets

Scope	Base	Target	Reduction	Alignment	Progress	Status
Scope 1 + 2Absolute	2019	2032	−55%	1.5°C	−0.0% reductionof −55% target · 0% there	Off track
Scope 3	2019	2027	−81%		−0.0% reductionof −81% target · 0% there	Off track

Net zero

1 target

Scope	Base	Target	Reduction	Alignment	Progress	Status
Scope 1 + 2	—	2030	—	In corporate strategy	absolute-value target	—

⚠ Some targets show progress vs the earliest extracted year as a baseline approximation. The real base-year value will be used once historical reports are extracted.

Progress · absolute tCO2e

Scope 1 + 2 trajectory vs target

Scope 1 + 2 · 55.00000000000001% by 2032 · 1.5°C

ActualLinear1.5°C

Scope 3 trajectory vs target

Scope 3 · 81% by 2027

ActualLinear1.5°C

Latest news· last 5 of 7

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Sustainable Aviation Fuel (SAF) purchase
Aon purchased the environmental attributes of more than 48,000 gallons of SAF, consumed October 2023, achieving 74.72% GHG emissions reduction vs fossil jet fuel comparator (403 tCO2 biogenic).
2023
Scope 3 categories 8, 9, 10, 11, 13, 14, 15 marked not relevant or zero
Several Scope 3 categories including Upstream leased assets (Cat 8), Downstream transportation (Cat 9), Processing of sold products (Cat 10), and Investments (Cat 15) are marked as not relevant or 0 in 2023, despite Cat 8 being 28,691 tCO2e and Cat 15 being 21,008 tCO2e in 2019 baseline.
2023
SBTi-approved absolute 55% reduction target by 2030
Target Abs1: 55% absolute reduction from 2019 base year (542,846 tCO2e total Scope 1+2+3) to 244,281 tCO2e by 12/31/2030, approved by SBTi, 1.5°C aligned, organization-wide.
2023
No third-party verification of emissions
Aon reports no third-party verification or assurance for Scope 1, Scope 2 (location or market), or Scope 3 emissions in the reporting year. Report has not been externally assured.
2023
First renewable energy purchases drive 15.25% Scope 1+2 reduction
In 2023, Aon purchased renewable energy equivalent to 7,608 tCO2e (vs 0 in 2022), reducing combined Scope 1 and 2 emissions by 15.25% year-over-year. Combined Scope 1+2 intensity decreased 12.68% per revenue and 8.39% per FTE.
2023