Dependent: Supplier engagement on purchased goods and services Emissions from purchased goods and services represented over 50% of Marsh's emissions in 2025 (342,849 tCO2e). The firm focuses engagement on strategic and priority suppliers based on size of spend, emissions, and maturity. Major cloud service providers have set 100% renewable electricity targets. 100% of electronics purchased in 2025 were EPEAT certified, avoiding over 11,000 metric tons of CO2e.
▾ expand
Primary: Business travel reduction Business travel (Scope 3 Cat 6) is one of Marsh's largest Scope 3 categories at 108,238 tCO2e in 2025, down from 113,708 in 2024. Included in the firm's CarbonNeutral certification scope, and addressed via internal policies that empower colleagues to make more sustainable travel choices.
▾ expand
Primary: Office energy efficiency — Wireless Centric Office and Smart Offices Throughout 2025 Marsh continued upgrading offices to its Wireless Centric Office format — wireless access points + energy-efficient switches use ~40% less cabling and 90% less power. Once rolled out across the portfolio by end of 2026, expected to save ~12 million kWh annually in electricity. 172 Smart Offices opened in 51 countries as of Dec 31, 2025. Strategic space planning has driven a 24% reduction in office space per FTE since 2019 (172 → 130 sq ft).
▾ expand
100% UK and Ireland offices achieved ISO 45001 and ISO 14001 100% of offices in the UK and Ireland achieved ISO 45001 (occupational health & safety) and ISO 14001 (environmental management) certifications in 2025.
▾ expand
Acquisitions of McGriff and Cardano integrated into baseline Marsh acquired McGriff and Cardano; emissions from these acquisitions are now incorporated into the restated 2019 baseline and ongoing inventory.
▾ expand
Re-baselined 2019 emissions to incorporate McGriff and Cardano acquisitions Marsh re-baselined its 2019 emissions baseline to incorporate recent acquisitions including McGriff and Cardano. Restated 2019 figures appear in the appendix and serve as the baseline for SBTi targets.
▾ expand
Businesses brought together under new Marsh brand Marsh McLennan brought its businesses together under a new Marsh brand to unlock the full value of the firm across risk, reinsurance and capital, talent, health and investments, and management consulting.
▾ expand
Carbon removals = 25% of offset portfolio Marsh's offset portfolio composition is 38% reduction, 37% avoidance, and 25% removal credits. The firm invests in emissions-avoidance and carbon-removal pathways outside its value chain alongside its science-based reduction trajectory. Project selection criteria include quality, location, additionality, and UN SDG alignment. Disclosed via California AB-1305.
▾ expand
84% renewable electricity in 2025, up from 13% in 2019 Marsh has rapidly scaled renewable electricity from 13% in 2019 to 76% in 2024 and 84% in 2025 across its global office portfolio. Renewable electricity is one of the firm's primary control levers for Scope 2 reductions (market-based Scope 2 fell from 83,293 tCO2e in 2019 to 7,964 tCO2e in 2025, a ~90% reduction).
▾ expand
Dependent: Responsible AI use to limit AI energy footprint Marsh's proprietary LenAI tool handles 34.3 million queries annually. The firm intentionally avoids large-scale model training unless there is a strong business case, partners with AI and cloud providers that have set climate targets, and provides colleagues with guidance on efficient prompting and selecting the most efficient model for each task.
▾ expand
see 6 more events →