Sifting through countless of stocks in the Marine Transportation 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 Star Bulk Carriers Corp. or Costamare Inc. 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 Star Bulk Carriers Corp. and Costamare Inc. compare based on key financial metrics to determine which better meets your investment needs.

About Star Bulk Carriers Corp. and Costamare Inc.

Star Bulk Carriers Corp., a shipping company, engages in the ocean transportation of dry bulk cargoes through the ownership and operation of dry bulk carrier vessels worldwide. Its vessels transport a range of bulk commodities, including iron ores, minerals and grains, bauxite, fertilizers, and steel products. As of December 31, 2025, the company owned a fleet of 136 dry bulk vessels consisting of Newcastlemax, Capesize, Post Panamax, Kamsarmax, Panamax, Ultramax, and Supramax vessels with carrying capacities between 55,569 deadweight tonnage and 209,537 deadweight tonnage. Star Bulk Carriers Corp. was incorporated in 2006 and is based in Marousi, Greece.

Costamare Inc. owns and operates containerships and dry bulk vessels worldwide. Its containerships are chartered to liner companies providing transportation of cargoes. The company also charters dry bulk vessels to various customers providing worldwide transportation for dry bulk cargoes. As of February 24, 2026, it had a fleet of fleet of 79 containerships and 38 dry bulk vessels. The company was founded in 1974 and is based in Monaco.

Latest Marine Transportation and Star Bulk Carriers Corp., Costamare Inc. Stock News

As of July 31, 2026, Star Bulk Carriers Corp. had a $3.2 billion market capitalization, compared to the Marine Transportation median of $740.4 million. Star Bulk Carriers Corp.’s stock is up 49.6% in 2026, up 2.2% in the previous five trading days and up 56.68% in the past year.

Currently, Star Bulk Carriers Corp.’s price-earnings ratio is 23.1. Star Bulk Carriers Corp.’s trailing 12-month revenue is $1.1 billion with a 13.0% net profit margin. Year-over-year quarterly sales growth most recently was 21.9%. Analysts expect adjusted earnings to reach $3.920 per share for the current fiscal year. Star Bulk Carriers Corp. currently has a 2.0% dividend yield.

As of July 31, 2026, Costamare Inc. had a $1.9 billion market cap, putting it in the 53rd percentile of all stocks. Costamare Inc.’s stock is down 1.3% in 2026, down 0.9% in the previous five trading days and up 63.14% in the past year.

Currently, Costamare Inc.’s price-earnings ratio is 5.5. Costamare Inc.’s trailing 12-month revenue is $866.1 million with a 39.5% net profit margin. Year-over-year quarterly sales growth most recently was -5.3%. Analysts expect adjusted earnings to reach $2.740 per share for the current fiscal year. Costamare Inc. currently has a 3.2% dividend yield.

How We Compare Star Bulk Carriers Corp. and Costamare Inc. 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 Star Bulk Carriers Corp. and Costamare Inc.’s stock grades to see how they measure up against one another.

Learn more about A+ Investor here!

Sign Up to Receive a Free Special Report Showing How A+ Grades Can Help You Make Smarter Investment Decisions

Star Bulk Carriers Corp. and Costamare Inc. Stock Value Grades

Company	Ticker	Value
Star Bulk Carriers Corp.	SBLK	B
Costamare Inc.	CMRE	A

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.

Star Bulk Carriers Corp. has a Value Score of 68, which is Value. Costamare Inc. has a Value Score of 83, which is Deep Value.

The Value Stock Winner: Costamare Inc.

As you can clearly see from the Value Grade breakdown above, Costamare Inc. is considered to have better value than Star Bulk Carriers Corp.. For investors who focus solely on a company’s valuation, Costamare Inc. could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Star Bulk Carriers Corp. and Costamare Inc. Growth Grades

Company	Ticker	Growth
Star Bulk Carriers Corp.	SBLK	B
Costamare Inc.	CMRE	B

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Star Bulk Carriers Corp. has a Growth Score of 77, which is Strong. Costamare Inc. has a Growth Score of 64, which is Strong.

The Growth Grade Winner: It’s a Tie!

Looking at the Growth Grade breakdown above, both Star Bulk Carriers Corp. and Costamare Inc. have a grade of B. For investors who focus solely on a company’s upward growth, further research should be conducted into both companies’ other financial metrics before deciding whether to invest.

Star Bulk Carriers Corp. and Costamare Inc.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Star Bulk Carriers Corp.	SBLK	A
Costamare Inc.	CMRE	D

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.

Star Bulk Carriers Corp. has a Earnings Estimate Score of 83, which is Very Positive. Costamare Inc. has a Earnings Estimate Score of 35, which is Negative.

The Earnings Estimate Revisions Grade Winner: Star Bulk Carriers Corp.

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, Star Bulk Carriers Corp. has a better Earnings Estimate Revisions Grade than Costamare Inc.. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, Star Bulk Carriers Corp. could be a good stock to invest in. However, it’s important to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Star Bulk Carriers Corp. and Costamare Inc. Grades

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

Momentum grades help 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.

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 Star Bulk Carriers Corp. and Costamare Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Star Bulk Carriers Corp. or Costamare Inc. Stock?

Overall, Star Bulk Carriers Corp. stock has a Value Score of 68, Growth Score of 77 and Estimate Revisions Score of 83.

Costamare Inc. stock has a Value Score of 83, Growth Score of 64 and Estimate Revisions Score of 35.

Comparing Star Bulk Carriers Corp. and Costamare Inc.’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.