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— Warren Buffett

A long-term investment in Northrop Grumman Corp (NYSE: NOC) illustrates how capital appreciation and dividend reinvestment can work together over an extended holding period. For investors evaluating a true buy-and-hold outcome, the company’s 20-year total return provides a useful case study in compounding, income growth, and the impact of staying invested through multiple market cycles.

Using a hypothetical $10,000 investment made on 10/20/2006 and held through 10/19/2026, with dividends reinvested, the position would have grown to $125,157.42. That equates to a total return of 1,150.82% and an average annual return of 13.46%.

Northrop Grumman 20-Year Return Details

NOC 20-Year Return Details
Start date:	10/20/2006	$10,000 10/20/2006   $125,157 10/19/2026
End date:	10/19/2026
Start price/share:	$62.16
End price/share:	$510.65
Starting shares:	160.88
Ending shares:	244.95
Dividends reinvested/share:	$84.39
Total return:	1,150.82%
Average annual return:	13.46%
Starting investment:	$10,000.00
Ending investment:	$125,157.42

The result is notable not simply because the ending value is large relative to the original capital, but because the return was generated across a long period that included recessions, shifting defense budgets, changes in interest-rate regimes, and periodic market drawdowns. That is the essence of buy-and-hold investing: the compounding math becomes meaningful only when capital remains invested long enough for both business performance and reinvested cash flows to accumulate.

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

What Drove the 20-Year Total Return?

Northrop Grumman’s long-term return in this example came from two sources:

• Share price appreciation: The stock price rose from $62.16 to $510.65.
• Dividend reinvestment: Cash dividends were used to buy additional shares over time, increasing the share count from 160.88 to 244.95.

That increase in share count is a central part of the analysis. Reinvestment converts a cash distribution into additional ownership, allowing subsequent dividends to be paid on a larger base of shares. Over long periods, even a modest dividend yield can make a meaningful contribution to ending wealth when paired with steady reinvestment.

The Role of Dividends in Northrop Grumman’s Buy-and-Hold Outcome

Over the 20-year period shown above, Northrop Grumman paid $84.39 per share in dividends. In a total-return framework, those distributions matter for two reasons. First, they provide a direct cash component of shareholder return. Second, when reinvested, they can materially increase the number of shares owned, which in turn amplifies future participation in both dividend income and stock-price gains.

The calculations above assume dividends were reinvested using the closing price on each ex-dividend date. That methodology is important because it measures the practical effect of a dividend reinvestment plan rather than looking only at the stock’s price change in isolation.

Current Yield and Yield on Cost

Based on the most recent annualized dividend rate of $9.88 per share, NOC has a current yield of approximately 1.93% using the ending share price of $510.65.

Another useful long-term income measure is yield on cost. This compares the current annual dividend with the original purchase price rather than the current market price. Using the same figures, a $9.88 annualized dividend against the initial $62.16 purchase price produces a yield on cost of 15.89%.

That metric does not indicate what a new buyer would earn today, but it does highlight how dividend growth can affect the economics of a long-held position. For long-duration holdings, rising dividends can meaningfully improve the income generated on the original capital committed.

Key Takeaways

• A $10,000 investment grew to $125,157.42 over 20 years with dividends reinvested.
• Total return was 1,150.82%, equivalent to an average annual return of 13.46%.
• Dividend reinvestment increased share ownership from 160.88 shares to 244.95 shares.
• Northrop Grumman’s long-term result reflects both price appreciation and income compounding, not just movement in the stock price.

For any long-term equity analysis, that distinction matters. A buy-and-hold outcome is best evaluated on a total-return basis, especially for dividend-paying stocks, because the combination of cash distributions and reinvestment can materially change the final result.

“In the end, how your investments behave is much less important than how you behave.” — Benjamin Graham