Sifting through countless of stocks in the Aerospace & Defense industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Kratos Defense & Security Solutions, Inc. or Rocket Lab Corporation because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation compare based on key financial metrics to determine which better meets your investment needs.

About Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation

Kratos Defense & Security Solutions, Inc., a technology company, provides technology, hardware, products, system, and software for the defense, national security, and commercial markets in the United States, other North America, the Asia Pacific, the Middle East, Europe, and Internationally. The company operates through Kratos Government Solutions and Unmanned Systems segments. It offers virtualized ground systems for satellites and space vehicles, including software for command and control, telemetry, and tracking and control; jet powered unmanned aerial drone systems and hypersonic vehicles and rocket systems; propulsion systems for drones, missiles, loitering munitions, supersonic systems, spacecraft and launch systems, command, control, communication, computing, combat, and intelligence surveillance and reconnaissance; and microwave electronic products for missile, radar, missile defense, space, and satellite; and counter unmanned aircraft systems, directed energy, communication and other systems, and virtual and augmented reality training systems for the warfighter. The company primarily serves national security-related agencies, the U.S. Department of Defense, intelligence and classified agencies, international government agencies, and domestic and international commercial customers. Kratos Defense & Security Solutions, Inc. was formerly known as Wireless Facilities, Inc. and changed its name to Kratos Defense & Security Solutions, Inc. in August 1999. Kratos Defense & Security Solutions, Inc. was incorporated in 1994 and is headquartered in San Diego, California.

Rocket Lab Corporation, a space company, provides launch services and space systems solutions in the United States, Canada, Japan, and internationally. The company operates through launch services and space systems segments. The company provides launch services, spacecraft design services, spacecraft components, spacecraft manufacturing, optical systems, and other spacecraft and on-orbit management solutions and constellation management services, as well as designs and manufactures small and medium-class rockets and develops flight and ground software. It also designs, manufactures, and sells Electron, an orbital small launch vehicle for small spacecraft launch services, as well as develops Neutron launch vehicles for large constellation deployments, interplanetary missions, and potentially for human spaceflight. In addition, the company designs and manufactures a range of components and subsystems for its launch vehicles and spacecraft. It serves commercial, aerospace prime contractors, and government customers. Rocket Lab Corporation was formerly known as Rocket Lab USA, Inc. and changed its name to Rocket Lab Corporation in August 2021. The company was founded in 2006 and is headquartered in Long Beach, California.

Latest Aerospace & Defense and Kratos Defense & Security Solutions, Inc., Rocket Lab Corporation Stock News

As of September 2, 2026, Kratos Defense & Security Solutions, Inc. had a $9.0 billion market capitalization, compared to the Aerospace & Defense median of $3.9 million. Kratos Defense & Security Solutions, Inc.’s stock is down 36% in 2026, down 9.5% in the previous five trading days and down 27.71% in the past year.

Currently, Kratos Defense & Security Solutions, Inc.’s price-earnings ratio is 282.7. Kratos Defense & Security Solutions, Inc.’s trailing 12-month revenue is $1.5 billion with a 2.0% net profit margin. Year-over-year quarterly sales growth most recently was 30.5%. Analysts expect adjusted earnings to reach $0.817 per share for the current fiscal year. Kratos Defense & Security Solutions, Inc. does not currently pay a dividend.

As of September 2, 2026, Rocket Lab Corporation had a $37.8 billion market cap, putting it in the 91st percentile of all stocks. Rocket Lab Corporation’s stock is down 8.4% in 2026, down 5.4% in the previous five trading days and up 27.97% in the past year.

Currently, Rocket Lab Corporation does not have a price-earnings ratio. Rocket Lab Corporation’s trailing 12-month revenue is $769.1 million with a -21.5% net profit margin. Year-over-year quarterly sales growth most recently was 62.0%. Analysts expect adjusted earnings to reach $-0.046 per share for the current fiscal year. Rocket Lab Corporation does not currently pay a dividend.

How We Compare Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation’s stock grades to see how they measure up against one another.

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Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation Stock Value Grades

Company	Ticker	Value
Kratos Defense & Security Solutions, Inc.	KTOS	F
Rocket Lab Corporation	RKLB	F

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection.

Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

Kratos Defense & Security Solutions, Inc. has a Value Score of 5, which is Ultra Expensive. Rocket Lab Corporation has a Value Score of 1, which is Ultra Expensive.

The Value Stock Winner: No Clear Winner

Neither Kratos Defense & Security Solutions, Inc. or Rocket Lab Corporation has a high enough value grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolio. It’s important to look at a wide range of financial metrics in order to determine if Kratos Defense & Security Solutions, Inc. or Rocket Lab Corporation is the better investment when it comes to value.

Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation’s Momentum Grades

Company	Ticker	Momentum
Kratos Defense & Security Solutions, Inc.	KTOS	F
Rocket Lab Corporation	RKLB	B

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Kratos Defense & Security Solutions, Inc. has a Momentum Score of 20, which is Very Weak. Rocket Lab Corporation has a Momentum Score of 64, which is Strong.

The Momentum Grade Winner: Rocket Lab Corporation

As you can clearly see from the Momentum Grade breakdown above, Rocket Lab Corporation is considered to have stronger momentum compared to Kratos Defense & Security Solutions, Inc.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Rocket Lab Corporation could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Kratos Defense & Security Solutions, Inc.	KTOS	B
Rocket Lab Corporation	RKLB	B

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

Kratos Defense & Security Solutions, Inc. has a Earnings Estimate Score of 66, which is Positive. Rocket Lab Corporation has a Earnings Estimate Score of 72, which is Positive.

The Earnings Estimate Revisions Grade Winner: It’s a Tie!

Looking at the Earnings Estimate Revisions Grade breakdown above, both Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation have a grade of B. For those focusing solely on a company’s estimate revisions, other financial metrics will need to be evaluated to determine whether Kratos Defense & Security Solutions, Inc. or Rocket Lab Corporation is a better fit.

Other Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation Grades

In addition to Estimate Revisions, Momentum and Value, A+ Investor also provides grades for Growth and Quality.

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and F-Score.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Kratos Defense & Security Solutions, Inc. or Rocket Lab Corporation Stock?

Overall, Kratos Defense & Security Solutions, Inc. stock has a Value Score of 5, Momentum Score of 20 and Estimate Revisions Score of 66.

Rocket Lab Corporation stock has a Value Score of 1, Momentum Score of 64 and Estimate Revisions Score of 72.

Comparing Kratos Defense & Security Solutions, Inc. and Rocket Lab Corporation’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.