Omnicom published FY2024 Scope 1 (32,733 tCO₂e) and Scope 2 (35,512 tCO₂e) using GHG Protocol methodology with third-party emission factors. Multi-year tracking in place; Scope 1 decreased 16.1% year-on-year. No independent third-party verification of the GHG inventory is confirmed in public disclosures.

Omnicom quantifies seven Scope 3 categories (336,108 tCO₂e, 83% of total footprint) using spend-based factors. Downstream categories—notably client campaign emissions—are not included, a material gap for an advertising firm amplifying client emissions. No supplier engagement programme or third-party verification documented.

29% absolute GHG reduction from 2019 to 2024 toward a 46.2% SBTi 2030 target. However, Scope 2 increased 3.5% and Scope 3 increased 3.9% from 2023 to 2024. Multi-year trajectory is credible but the 2023→2024 reversal on both scopes limits confidence in continued progress.

Renewable energy reached 31.9% in 2024 (up from 16.1% in 2019), sourced primarily via utility green tariffs. No RE100 membership, no verified power purchase agreements, and no on-site generation confirmed. Reliance on tariff-based renewables rather than additional procurement instruments limits score.

Omnicom's office-based model presents genuinely negligible direct nature impact. No TNFD disclosure, nature risk assessment, biodiversity policy, or deforestation commitment found. As an advertising holding company with digital and consumables supply chain, material nature risk is low; absence of formal policy reflects low priority rather than high risk.

18% reduction in office square footage in 2023 indirectly reduces material consumption. Supplier Code of Conduct (January 2021) sets supply chain standards. No quantified waste metrics, circular economy targets, or recycling programme data disclosed.

Office-based operations with no manufacturing, chemical processes, or water-intensive activities present negligible water pollution risk or withdrawal. No formal water stewardship programme or quantified consumption data found. No documented incidents support low inherent impact score.

SBTi-validated near-term target: 46.2% absolute reduction in Scopes 1, 2, and 3 by 2030 (vs 2019). As of 2023, 30.2% achieved. Ad Net Zero signatory. No SBTi-validated long-term or net-zero target; no offset or removal credit strategy published.

Chief Environmental Sustainability Officer appointed 2021. Board Governance Committee oversees environmental sustainability (2024 Proxy Statement confirmed). Annual Corporate Responsibility Reports published; UNGC signatory with annual CDP response. Environmental Policy and Supplier Code public. No compensation linked to sustainability targets.

Clean Creatives' F-List 2024 documented 74 active fossil fuel contracts across Omnicom agencies (BBDO, DDB, TBWA, OMD, PHD, FleishmanHillard, Ketchum)—clients include ExxonMobil, TotalEnergies, Shell. InfluenceMap October 2024: only 8% of Omnicom clients aligned with Paris Agreement (lowest of Big Six). US House Oversight Committee (April 2024) cited BBDO-created ExxonMobil carbon capture advertisements as greenwashing examples. No fossil-sector client policy, phase-out commitment, or credible wind-down documented.