---
ticker: MMC
company: Marsh & McLennan Companies Inc.
filing_type: 10-K
year_current: 2026
year_prior: 2025
risks_added: 1
risks_removed: 0
risks_modified: 2
risks_unchanged: 33
source: SEC EDGAR
url: https://riskdiff.com/mmc/2026-vs-2025/
markdown_url: https://riskdiff.com/mmc/2026-vs-2025/index.md
generated: 2026-05-10
---

# Marsh & McLennan Companies Inc.: 10-K Risk Factor Changes 2026 vs 2025

> Source: U.S. Securities and Exchange Commission (EDGAR)  
> Generated: 2026-05-10  
> All data extracted directly from official filings. No hallucinated content.

> **[AI-Generated Summary]** The paragraph below was produced by a language
> model and may contain errors. All other content on this page is deterministically
> extracted from the original SEC filing.

> Marsh & McLennan added one new risk factor concerning potential failure to realize benefits from its Thrive program and Business Client Services initiatives. The company substantially modified its consulting segment risk disclosure and its business responsibility risk factor, reflecting evolving regulatory and stakeholder expectations around corporate governance and sustainability practices. With 33 unchanged risks and minimal structural alterations overall, the risk profile remained largely stable year-over-year.

---

## Summary

| Status | Count |
|--------|-------|
| New risks added | 1 |
| Risks removed | 0 |
| Risks modified | 2 |
| Unchanged | 33 |

---

## New in Current Filing: We may not be able to fully realize the benefits of our Thrive program and Business Client Services.

In 2025, we launched a three-year program, Thrive, which focuses on our brand strategy, delivering greater value to clients, accelerating growth and improving efficiency (the "Program"). As part of the Program we also created a new unit, Business Client Services ("BCS") to accelerate innovation and centralize investments in operational excellence, data, AI and other analytics. As a part of these initiatives, we may optimize our global footprint, which involves inherent risks, including potential business disruptions or processing activities, loss of continuity or institutional knowledge, challenges in managing third-party providers and compliance with foreign regulatory requirements. The Program will generate savings from process and automation efficiencies and optimization of our global operating model. However, actual total costs, savings and timing may differ from our estimates due to changes in the scope or assumptions underlying the Program and other operational improvements through BCS. We cannot guarantee that we will achieve the targeted savings. If we do not realize the expected cost savings, we may be unable to reinvest in planned growth or strategic initiatives. Moreover, unanticipated costs or unrealized savings in connection with the Program could adversely affect our consolidated financial statements. Global Operations

---

## Modified: RISKS RELATING TO OUR CONSULTING SEGMENT

**Key changes:**

- Reworded sentence: "Our Consulting segment, conducted through Mercer and Marsh Management Consulting, represented 36% of our total revenue in 2025."

**Prior (2025):**

Our Consulting segment, conducted through Mercer and Oliver Wyman Group, represented 37% of our total revenue in 2024. Our businesses in this segment are subject to particular risks.

**Current (2026):**

Our Consulting segment, conducted through Mercer and Marsh Management Consulting, represented 36% of our total revenue in 2025. Our businesses in this segment are subject to particular risks.

---

## Modified: Increasing scrutiny and changing laws and expectations from regulators, investors, clients and our colleagues with respect to our business responsibility practices and disclosure may impose additional costs on us or expose us to new or additional risks.

**Key changes:**

- Reworded sentence: "There is continued focus, including from governmental organizations, regulators, investors, colleagues and clients, on matters related to environmental stewardship and sustainability, strategies to foster a vibrant and inclusive culture, and responsible business practices, including government relations and public affairs initiatives."
- Reworded sentence: "As these reporting requirements and standards evolve, we continue to evaluate and update our public disclosures in these areas, including refining our disclosure of metrics and sustainability goals in accordance with the guidance and our own business responsibility assessments and priorities."
- Reworded sentence: "Organizations that provide information to investors on corporate governance and related matters have also developed ratings processes for evaluating companies on their approach to business responsibility, and unfavorable ratings of our company or our industries may lead to negative investor sentiment and the diversion of investment to other companies or industries, exclusion of our stock from business responsibility-oriented indices or investment funds or harm our relationships with regulators and the communities in which we operate."
- Reworded sentence: "The impact of new laws and regulations, negative public perception, adverse publicity or negative comments in social media could damage our reputation, and be costly to defend, if we do not, or are not perceived to, adequately address these issues."

**Prior (2025):**

There is continued focus, including from governmental organizations, regulators, investors, colleagues and clients, on ESG and sustainability issues. The regulatory landscape related to these issues continues to evolve, with new laws and reporting requirements introduced across various jurisdictions, including in the U.S., the U.K., the European Union (E.U.) and Australia. These laws and regulations may impose additional compliance or disclosure obligations on us. Inconsistent or even conflicting requirements across jurisdictions may also increase compliance challenges, add operational costs, or lead to stakeholder dissatisfaction. As these ESG reporting requirements and standards evolve, we continue to evaluate and update our public disclosures in these areas, including refining our disclosure of metrics and sustainability goals in accordance with the guidance and our own ESG assessments and priorities. These disclosures, metrics and sustainability goals and any failure to accurately report or comply with federal, state or international ESG laws and regulations, or achieve progress on our metrics and sustainability goals on a timely basis, or at all, may result in legal and regulatory proceedings against us and negatively impact our reputation. Implementation of our ESG initiatives also depends in part on third-party performance or data that is outside the Company's control. In addition, heightened regulatory scrutiny of ESG and sustainability-related products, funds, investment strategies and advice has increased the risk that we could be perceived as, or accused of, making inaccurate or misleading statements, or that we have otherwise run afoul of regulation. Such perceptions or accusations could damage our reputation, result in litigation or regulatory enforcement actions, and adversely affect our business. Organizations that provide information to investors on corporate governance and related matters have also developed ratings processes for evaluating companies on their approach to ESG matters, and unfavorable ratings of our company or our industries may lead to negative investor sentiment and the diversion of investment to other companies or industries, exclusion of our stock from ESG-oriented indices or investment funds or harm our relationships with regulators and the communities in which we operate. Moreover, public opinion and potential legal actions regarding ESG-related initiatives remain highly dynamic and can vary across stakeholders and geographies. Balancing these competing expectations globally is complex. 23 23 23 The impact of new laws and regulations, negative public perception, adverse publicity or negative comments in social media could damage our reputation, and be costly to defend, if we do not, or are not perceived to, adequately address these issues. Any harm to our reputation could impact colleague engagement and retention and the willingness of clients and our partners to do business with us.

**Current (2026):**

There is continued focus, including from governmental organizations, regulators, investors, colleagues and clients, on matters related to environmental stewardship and sustainability, strategies to foster a vibrant and inclusive culture, and responsible business practices, including government relations and public affairs initiatives. We refer to these matters collectively as business responsibility. The regulatory landscape related to these issues 19 19 19 continues to evolve, with new laws and reporting requirements introduced across various jurisdictions, including in the U.S., the U.K., the European Union (E.U.) and Australia. These laws and regulations may impose additional compliance or disclosure obligations on us. Inconsistent or even conflicting requirements across jurisdictions may also increase compliance challenges, add operational costs, or lead to stakeholder dissatisfaction. As these reporting requirements and standards evolve, we continue to evaluate and update our public disclosures in these areas, including refining our disclosure of metrics and sustainability goals in accordance with the guidance and our own business responsibility assessments and priorities. These disclosures, metrics and sustainability goals and any failure to accurately report or comply with federal, state or international laws and regulations, or achieve progress on our metrics and sustainability goals on a timely basis, or at all, may result in legal and regulatory proceedings against us and negatively impact our reputation. Implementation of our business responsibility initiatives also depends in part on third-party performance or data that is outside the Company's control. In addition, heightened regulatory scrutiny of environmental and sustainability-related products, funds, investment strategies and advice has increased the risk that we could be perceived as, or accused of, making inaccurate or misleading statements, or that we have otherwise run afoul of regulation. Such perceptions or accusations could damage our reputation, result in litigation or regulatory enforcement actions, and adversely affect our business. Organizations that provide information to investors on corporate governance and related matters have also developed ratings processes for evaluating companies on their approach to business responsibility, and unfavorable ratings of our company or our industries may lead to negative investor sentiment and the diversion of investment to other companies or industries, exclusion of our stock from business responsibility-oriented indices or investment funds or harm our relationships with regulators and the communities in which we operate. Moreover, public opinion and potential legal actions regarding business responsibility initiatives remain highly dynamic and can vary across stakeholders and geographies. Balancing these competing expectations globally is complex. The impact of new laws and regulations, negative public perception, adverse publicity or negative comments in social media could damage our reputation, and be costly to defend, if we do not, or are not perceived to, adequately address these issues. Any harm to our reputation could impact colleague engagement and retention and the willingness of clients and our partners to do business with us.

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*Data sourced from SEC EDGAR. Last updated 2026-05-10.*