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“When we own portions of outstanding businesses with outstanding managements, our favorite holding period is forever.”

— Warren Buffett

A long-term investment in AMETEK Inc (NYSE: AME) has been a strong example of how compounding can work over extended holding periods. Using a dividend-reinvestment framework, a $10,000 purchase of AME shares in October 2006 would have grown to more than $203,000 by October 2026, driven primarily by share price appreciation and supplemented by reinvested dividends.

That outcome highlights an important distinction in equity investing: exceptional total returns do not always require a high dividend yield. In AMETEK’s case, the dominant factor was sustained business growth reflected in the stock price, while a modest but consistent dividend added incremental compounding over time.

AMETEK 20-Year Return at a Glance

AME 20-Year Return Details
Start date:	10/23/2006	$10,000 10/23/2006   $203,687 10/20/2026
End date:	10/20/2026
Start price/share:	$13.82
End price/share:	$247.36
Starting shares:	723.59
Ending shares:	823.49
Dividends reinvested/share:	$10.40
Total return:	1,936.99%
Average annual return:	16.26%
Starting investment:	$10,000.00
Ending investment:	$203,687.74

The result is straightforward: over the 20-year period shown above, AMETEK generated a 1,936.99% total return, or 16.26% annualized, assuming dividends were reinvested. In dollar terms, that turned a $10,000 initial investment into $203,687.74 as of 10/20/2026. These figures were calculated using the Dividend Channel DRIP Returns Calculator.

What Drove AMETEK’s Long-Term Return?

AMETEK’s long-run shareholder return appears to have come from three reinforcing elements:

• Substantial capital appreciation: the share price rose from $13.82 to $247.36 over the period shown.
• Dividend reinvestment: cash dividends purchased additional shares, increasing the share count from 723.59 to 823.49.
• Time: compounding became more powerful as gains accumulated over many years rather than a few quarters.

This is a useful illustration of how high-quality industrial and instrumentation businesses can create wealth over time. AMETEK operates across electronic instruments and electromechanical devices, serving a range of end markets where precision, reliability, and recurring replacement or service demand can support durable operating performance. Over long stretches, businesses with those characteristics can produce returns that far exceed what the starting dividend yield alone might suggest.

The Role of Dividend Reinvestment

Dividend reinvestment mattered, even though AMETEK has not typically been viewed as a high-yield stock. Over the past 20 years in this analysis, the company paid $10.40 per share in dividends, and those distributions were assumed to be reinvested into additional shares at the closing price on each dividend’s ex-dividend date.

That process increased the investor’s share count by nearly 100 shares, from 723.59 to 823.49. The effect is important: each reinvested dividend bought more ownership, and that larger ownership base then participated in subsequent price appreciation and future dividends. This is the basic mechanism behind dividend compounding.

Current Yield vs. Yield on Cost

Based on the most recent annualized dividend rate of $1.36 per share, AME has a current yield of approximately 0.55%. That is modest in absolute terms, and it underscores that AMETEK has been more of a total-return stock than an income stock.

However, the same dividend can look very different when measured against the original purchase price. Using the 2006 entry price of $13.82, the current annualized dividend of $1.36 implies a yield on cost of 9.84%.

Yield on cost does not determine present valuation, but it can help explain why long-held dividend growers are so valuable to patient shareholders. A company that starts with a low yield can still become a meaningful income producer over time if earnings and dividends keep compounding.

Key Takeaways From the AMETEK Example

• Total return matters more than headline yield. AMETEK’s wealth creation came primarily from business growth and stock appreciation.
• Dividend reinvestment adds meaningful value over long periods. Even a relatively low-yielding stock can benefit from systematic reinvestment.
• Holding period can be decisive. A strong business compounded over two decades can produce results that are difficult to achieve through short-term trading.

For investors studying historical winners, AMETEK demonstrates that disciplined long-term ownership in a high-performing company can be extraordinarily powerful. The more difficult question, as always, is not what the stock did over the last 20 years, but whether the underlying business can continue generating the kind of earnings growth, cash flow, and capital allocation that support strong returns in the years ahead.

One more piece of investment wisdom to close with:
“October is one of the peculiarly dangerous months to speculate in stocks. The others are July, January, September, April, November, May, March, June, December, August and February.” — Mark Twain