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— Warren Buffett

A 20-year buy-and-hold investment in Marsh & McLennan Companies illustrates how compounding can shape long-term equity returns. Using dividend reinvestment, a hypothetical $10,000 investment in Marsh & McLennan shares purchased in October 2006 would have grown to $103,474.03 by October 16, 2026, according to the return data shown below. That outcome combines capital appreciation with the cumulative effect of reinvested dividends.

Marsh & McLennan operates in insurance brokerage, risk management, reinsurance, and consulting, which places it in a segment of the financial services industry often associated with recurring client relationships, fee-based revenue, and relatively resilient cash generation. For long-horizon investors, those characteristics can matter because sustained total return is often driven as much by business durability and dividend growth capacity as by short-term market movements.

MRSH 20-Year Return Details

MRSH 20-Year Return Details
Start date:	10/19/2006	$10,000 10/19/2006   $103,474 10/16/2026
End date:	10/16/2026
Start price/share:	$28.38
End price/share:	$188.35
Starting shares:	352.36
Ending shares:	549.32
Dividends reinvested/share:	$33.13
Total return:	934.65%
Average annual return:	12.39%
Starting investment:	$10,000.00
Ending investment:	$103,474.03

What Drove The 20-Year Total Return

The result was not driven by share price appreciation alone. Over the holding period, Marsh & McLennan paid a cumulative $33.13 per share in dividends, and the calculation assumes those cash distributions were reinvested on each ex-dividend date at the closing price. That reinvestment increased the share count from 352.36 to 549.32, a meaningful gain in ownership that amplified the ending value.

This distinction matters. Long-term stock performance is often evaluated through price charts, but total return gives a fuller picture by capturing both market value gains and cash income returned to shareholders. In a business with a long record of paying dividends, reinvestment can become a significant contributor to compounded wealth creation, especially over multi-decade periods.

Key Takeaways At A Glance

• A $10,000 investment grew to $103,474.03 over roughly 20 years.
• Total return was 934.65% with dividends reinvested.
• The annualized return was 12.39%.
• Share count rose from 352.36 to 549.32 through reinvestment.
• Cumulative dividends paid over the period totaled $33.13 per share.

Dividend Yield And Yield On Cost

Based on the most recent annualized dividend rate of $3.96 per share, MRSH has a current yield of approximately 2.10% using the ending share price of $188.35. Another useful lens is yield on cost, which compares the current annual dividend to the original purchase price. Using the $28.38 starting share price, the current dividend rate implies a yield on cost of 7.40%.

Yield on cost is not a valuation metric, and it does not indicate what a new buyer earns at today’s price. Its value is historical: it helps show how dividend growth can enhance the income profile of a long-held position. For investors focused on compounding income, that can be one of the clearest illustrations of why holding period matters.

Why The Business Model Matters In A Buy-And-Hold Strategy

Buy-and-hold success over two decades typically requires more than a favorable entry price. It usually depends on a company’s ability to preserve competitive positioning, generate durable earnings, allocate capital effectively, and continue returning cash to shareholders. Marsh & McLennan’s mix of brokerage and advisory businesses has historically offered characteristics that can support that profile, including service-based revenue and limited balance-sheet intensity relative to many capital-heavy industries.

That does not mean returns arrive in a straight line. Even strong compounders can go through periods of valuation compression, slower organic growth, acquisition integration risk, or cyclical pressure in end markets. Over long periods, however, consistent execution and dividend reinvestment can outweigh shorter-term volatility.

[These numbers were computed with the Dividend Channel DRIP Returns Calculator.]

“If you’re prepared to invest in a company, then you ought to be able to explain why in simple language that a fifth grader could understand, and quickly enough so the fifth grader won’t get bored.” — Peter Lynch