Mark Christopher McGivney
Chief Financial Officer at Marsh & McLennan Companies
Thank you, John and good morning. Our momentum continued in the third quarter with solid underlying revenue growth, significant margin expansion and 4% growth in adjusted EPS, or 11%, excluding a large discrete tax benefit last year. Our consolidated revenue increased 6% to $5.7 billion with underlying growth of 5%. Operating income was $1.1 billion and adjusted operating income was $1.2 billion, up 12%. Our adjusted operating margin increased 110 basis points to 22.4%. GAAP EPS was $1.51. Adjusted EPS was $1.63.
For the first nine months, underlying revenue growth was 7%. Adjusted operating income grew 12% to $4.9 billion. Our adjusted operating margin increased 110 basis points to 28% and adjusted EPS increased 10% to $6.93. Looking at risk and insurance services, third quarter revenue was $3.5 billion, up 8% from a year ago or 6% on an underlying basis. This result marks the 15th consecutive quarter of 6% or higher underlying growth in RIS, and continues the best stretch of growth in two decades.
Note that fiduciary income was $138 million in the quarter. In looking ahead to the fourth quarter, we expect to see this amount decline by approximately $30 million, reflecting recent rate cuts and a seasonal drop in fiduciary assets.
Operating income in RIS increased 15% to $733 million. Adjusted operating income increased 16% to $775 million and our adjusted operating margin expanded 130 basis points to 24.7%. For the first nine months, revenue in RIS was $11.7 billion, underlying growth of 8%. Adjusted operating income increased 12% to $3.7 billion and the margin increased 100 basis points to 33.6%.
At Marsh, revenue in the quarter was $2.9 billion, up 9% from a year ago or 7% on an underlying basis. This comes on top of 8% growth in the third quarter of last year. Growth in the third quarter was broad based and reflected solid retention and new business growth. In U.S. and Canada, underlying growth was 6% for the quarter, led by strong growth in MMA and in Victor, our MGA business.
In international, underlying growth was 7% and comes on top of 10% in the third quarter of last year. Latin America was up 8%, EMEA was up 7% and Asia Pacific was up 5%. First nine months of the year, Marsh's revenue was $9.2 billion with underlying growth of 7%. U.S. and Canada grew 7% and international was up 7%. Guy Carpenter's revenue was $381 million in the quarter, up 6% or 7% on an underlying basis, driven by strong growth in international, including global specialties. For the first nine months of the year, Guy Carpenter generated $2.2 billion of revenue and 8% underlying growth.
In the consulting segment, third quarter revenue was $2.3 billion, up 3% from a year ago or 4% on an underlying basis. Consulting operating income was $462 million and adjusted operating income was $478 million, up 7%. Our adjusted operating margin in consulting was 21.7% in the third quarter, an increase of 90 basis points. The first nine months, consulting revenue was $6.7 billion with underlying growth of 5%. Adjusted operating income increased 7% to $1.3 billion, and our adjusted operating margin increased 60 basis points to 20.7%.
Mercer's revenue was $1.5 billion in the quarter, up 5% on an underlying basis, this was Mercer's 14th consecutive quarter of 5% or higher underlying growth. Health underlying growth remained strong at 8% and reflected growth across all regions. Career grew 5% where we saw strong growth in rewards and talent strategy. Wealth grew 4%, driven by continued demand in defined benefits consulting and growth in investment management. Our assets under management at the end of the third quarter rose to $548 billion, up significantly from the third quarter of last year and up 11% sequentially.
Year-over-year growth was driven by the impact of capital markets, our transaction with vanguard and positive net flows. For the first nine months of the year, revenue at Mercer was $4.3 billion with 6% underlying growth. Oliver Wyman's revenue in the quarter was $810 million, up 1% on an underlying basis. This reflects a tough comparison to 12% growth in the third quarter of last year and softness in certain geographies. We currently see this trend extending into the fourth quarter.
The first nine months of the year, revenue at Oliver Wyman was $2.4 billion, an increase of 5% on an underlying basis. Foreign exchange had very little impact on earnings in the third quarter. Assuming exchange rates remain at current levels, we also expect minimal FX impact in the fourth quarter.
Total noteworthy items in the quarter were $78 million. These included $54 million of restructuring costs, mostly related to the program we began in the fourth quarter of 2022, as well as some transaction related charges. Our other net benefit credit was $68 million in the quarter. For the full year 2024, we expect our other net benefit credit will be about $270 million. Interest expense in the third quarter was $154 million, up from $145 million in the third quarter of 2023, reflecting higher levels of debt and higher interest rates.
Based on our current forecast, we expect approximately $151 million of interest expense in the fourth quarter, excluding any amounts related to the McGriff transaction. Our adjusted effective tax rate in the third quarter was 26.7%, compared with 20.5% in the third quarter of last year. Our tax rate last year included the release of a valuation allowance on foreign deferred tax assets.
Excluding discrete items, our adjusted effective tax rate was approximately 26.5%. When we give forward guidance around our tax rate, we do not project discrete items which can be positive or negative. Based on the current environment, we expect an adjusted effective tax rate of approximately 26.5% for 2024.
Turning to our McGriff transaction, McGriff is a terrific company with excellent leadership, a culture similar to MMA's, a diversified business mix, presence in faster growing U.S. markets and a strong track record of performance. We will be paying $7.75 billion in cash consideration, funded by a combination of cash on hand and new debt, and we expect to close by year end subject to regulatory approval.
As part of the transaction, we expect to assume a deferred tax asset valued at approximately $500 million. As we've noted in the past, we maintain considerable balance sheet flexibility to position us for this type of opportunity. We've secured a committed bridge loan facility for the full amount of the purchase price, and currently plan to replace these commitments with permanent financing in the fourth quarter as we get closer to closing. Based on our outlook today, we expect to raise $7.25 billion in new debt to fund the transaction. We value our high-quality ratings, and we were pleased that all three rating agencies recently affirmed our current ratings with no changes in outlook.
The financial and capital management plan contemplated in the transaction is not only consistent with maintaining our current ratings, but we also expect to have meaningful flexibility for capital deployment next year. Although initially, our leverage ratios will increase, the substantial cash flow we expect to generate, as well as increased debt capacity through earnings growth will enable us to bring our leverage ratios back in line with levels necessary to maintain a strong ratings profile. As a result, while we intend to pause share repurchases in the fourth quarter, as we think about capital management into next year, we expect we will maintain our balanced approach that includes increasing our dividend and reducing our share count each year as well as continuing to fund high quality acquisitions. We will obviously have more guidance around our outlook for capital deployment in 2025 on our fourth quarter earnings call early next year.
As John noted, we expect the transaction will be modestly accretive to adjusted EPS, excluding amortization in year one, becoming more meaningfully accretive in year two and beyond. This transaction is a great reflection of several elements of our capital management strategy, maintaining flexibility to take advantage of opportunities, a bias to reinvest capital for growth and delivering in the near term, while challenging ourselves to invest to sustain growth into the future.
Earnings capital management in our balance sheet, we ended the quarter with total debt of $12.8 billion. Our next scheduled debt maturity is in the first quarter of 2025, when $500 million of senior notes mature. We currently expect to deploy approximately $4.2 billion of capital in 2024 across dividends, acquisitions and share repurchases, excluding the McGriff transaction. Our cash position at the end of the third quarter was $1.8 billion. Uses of cash in the quarter total $1.1 billion, and it included $404 million for dividends, $435 million for acquisitions and $300 million for share repurchases. For the first nine months, uses of cash totaled $3.3 billion, included $1.1 billion for dividends, $1.3 billion for acquisitions and $900 million for share repurchases.
I want to spend a minute on our plans to change how we report adjusted EPS. Starting next year, we will exclude the impact of acquisition related amortization from adjusted EPS. We will also exclude the other net benefit credit, another noncash item. These changes will improve the comparability of our results and give investors a better sense of our core earnings power. They will also conform our adjusted EPS reporting with how we report adjusted operating margins.
While there continues to be uncertainty in the outlook for the global economy, we feel good about the momentum in our business, and the current environment remains supportive of growth. Overall, we are well positioned for another great year in 2024. Based on our outlook today for the full year, we continue to expect mid-single digit or better underlying growth, margin expansion and strong growth in adjusted EPS. With that, I'm happy to turn it back to John.