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— Warren Buffett

A five-year buy-and-hold investment in Amgen Inc (NASD: AMGN) produced a strong total return, illustrating how long-term equity performance can differ markedly from the day-to-day volatility investors see on a stock quote screen. For shareholders who bought AMGN in late 2021 and held through late 2026, the combination of capital appreciation and reinvested dividends generated a meaningfully higher ending value than price change alone would suggest.

The broader point is straightforward: a long holding period can allow business performance, cash generation, and shareholder distributions to compound, while reducing the importance of short-term market fluctuations. In Amgen’s case, that approach proved highly rewarding over the period examined below.

Amgen Five-Year Total Return

AMGN 5-Year Return Details
Start date:	11/01/2021	$10,000 11/01/2021   $25,665 10/29/2026
End date:	10/29/2026
Start price/share:	$209.79
End price/share:	$460.73
Starting shares:	47.67
Ending shares:	55.70
Dividends reinvested/share:	$44.12
Total return:	156.62%
Average annual return:	20.77%
Starting investment:	$10,000.00
Ending investment:	$25,665.29

A $10,000 investment in Amgen on 11/01/2021 would have grown to $25,665.29 by 10/29/2026, assuming dividends were reinvested. That equates to a cumulative total return of 156.62% and an annualized return of 20.77%. Put differently, the investment more than doubled over the five-year holding period.

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

What Drove the Return

The result came from two distinct sources:

• Share price appreciation: AMGN rose from $209.79 to $460.73 per share.
• Dividend income: shareholders collected $44.12 per share in dividends over the period, with reinvestment increasing the share count from 47.67 to 55.70.

This distinction matters. Price appreciation often receives most of the attention, but for mature large-cap biopharmaceutical companies such as Amgen, dividend income can contribute materially to total return, particularly when distributions are reinvested systematically. Reinvestment increases the share base, which in turn allows future dividends to be paid on a larger number of shares.

Why Dividend Reinvestment Matters

Dividend reinvestment is one of the clearest examples of compounding in public equities. Instead of receiving cash and leaving it idle, each dividend purchases additional shares. Over time, that process can lift total return even if the underlying stock experiences uneven price performance from year to year.

In this example, the ending share count increased by just over eight shares through reinvestment. That incremental ownership helped amplify the value of the position by the end of the holding period. For long-duration investors, this is often the most important difference between tracking simple price return and evaluating true total return.

Current Yield and Yield on Cost

Based on the most recent annualized dividend rate of $10.08 per share, AMGN has a current yield of approximately 2.19% using the ending share price of $460.73.

Another useful measure is yield on cost, which compares the current annualized dividend to the original purchase price. Using the 11/01/2021 entry price of $209.79, the yield on cost is approximately 4.81%. That figure highlights how dividend growth can improve the income profile of a long-held position, even when the stock’s current market yield appears moderate.

Key Takeaways From the Five-Year Holding Period

• Amgen generated a 156.62% five-year total return with dividends reinvested.
• A $10,000 initial investment grew to $25,665.29.
• Annualized return was 20.77% over the full holding period.
• Dividends added meaningfully to results by increasing share ownership over time.
• Yield on cost rose above the stock’s current market yield because the dividend is measured against the original purchase price.

The main lesson from this AMGN holding-period analysis is not simply that the stock performed well. It is that total return analysis gives a more complete picture than price charts alone, and that patience, reinvestment, and dividend growth can materially influence long-run outcomes.

“I made my money by selling too soon.” — Bernard Baruch