Which Is a Better Investment, Inari Medical Inc or Penumbra Inc Stock?

By Jenna Brashear
March 31, 2026
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Sifting through countless of stocks in the Health Care Equipment & Supplies 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 Penumbra or 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 Penumbra and Inc. compare based on key financial metrics to determine which better meets your investment needs.

About Penumbra and Inc.

Penumbra, Inc., together with its subsidiaries, designs, develops, manufactures, and markets medical devices in the United States and internationally. It offers computer-assisted vacuum thrombectomy; peripheral thrombectomy products, including the Indigo System for power aspiration of thrombus in the body; Lightning Flash, a mechanical thrombectomy system; Lightning Bolt 7, an arterial thrombectomy system; and CAT RX. It also provides access products, including guide catheters and the Penumbra distal delivery catheters under the Neuron, Neuron MAX, BENCHMARK, BMX, DDC, Access25; MIDWAY, and PX SLIM brands; Penumbra System, an integrated mechanical thrombectomy system comprising reperfusion catheters and separators, the 3D Revascularization device, aspiration tubing, aspiration pump, and other components and accessories under the Penumbra RED, SENDit, JET, ACE, BMX, Max, 3D Revascularization Device, and Penumbra ENGINE brands; and neuro embolization coiling systems that include the Penumbra Coil 400, for the treatment of aneurysms and other complex lesions, detachable coils of neurovascular lesions under the Penumbra SMART COIL, SwiftSET, and Penumbra SwiftPAC Coil brands; and POD400 and PAC400 brands. In addition, it provides peripheral embolization products, such as Ruby Embolization Platform, which consists of detachable coils for peripheral applications; Ruby LP and XL Embolization Platform; Penumbra LANTERN Delivery Microcatheter, a low-profile microcatheter with a high-flow lumen; POD (Penumbra Occlusion Device) System, a single device solution; Packing Coil LP; and Packing Coil, a complementary device for use in other peripheral embolization products. Further, it offers neurosurgical tools comprising the Artemis Neuro Evacuation Device for surgical removal of fluid and tissue from the ventricles and cerebrum. It sells its products through direct sales organizations and distributors. The company was incorporated in 2004 and is based in Alameda, California.

Latest Health Care Equipment & Supplies and Penumbra, Inc., Stock News

As of March 30, 2026, Penumbra, Inc. had a $12.9 billion market capitalization, compared to the Health Care Equipment & Supplies median of $293.0 million. Penumbra, Inc.’s stock is NA in 2026, NA in the previous five trading days and up 21.73% in the past year.

Currently, Penumbra, Inc.’s price-earnings ratio is 72.6. Penumbra, Inc.’s trailing 12-month revenue is $1.4 billion with a 12.7% net profit margin. Year-over-year quarterly sales growth most recently was 22.2%. Analysts expect adjusted earnings to reach $5.036 per share for the current fiscal year. Penumbra, Inc. does not currently pay a dividend.

Currently, does not have a price-earnings ratio. ’s trailing 12-month revenue is $0.0 with a % net profit margin. As of March 30, 2026, has not reported significant year-over-year quarterly sales. There are no analysts providing consensus earnings estimates for the current fiscal year. does not currently pay a dividend.

How We Compare Penumbra and 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 Penumbra and Inc.’s stock grades to see how they measure up against one another.

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Penumbra and Inc. Stock Value Grades

Company Ticker Value
Penumbra, Inc. PEN 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.

Penumbra, Inc. has a Value Score of 3, which is Ultra Expensive.

The Value Stock Winner: No Clear Winner

Neither Penumbra or Inc. 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 Penumbra or Inc. is the better investment when it comes to value.

Penumbra and Inc. Growth Grades

Company Ticker Growth
Penumbra, Inc. PEN D

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.

Penumbra, Inc. has a Growth Score of 40, which is Weak.

The Growth Stock Winner: No Clear Winner

Neither Penumbra or Inc. has a high enough Growth 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 portfolios. It’s important to look at a wide range of financial metrics in order to determine if Penumbra or Inc. is the better investment when it comes to sustainable growth.

Penumbra and Inc.’s Estimate Revisions Grades

Company Ticker Earnings Estimate
Penumbra, Inc. PEN C

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.

Penumbra, Inc. has a Earnings Estimate Score of 56, which is Neutral.

The Earnings Estimate Revisions Stock Winner: No Clear Winner

Neither Penumbra or Inc. has an Earnings Estimate Revisions Grade that could be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Penumbra or Inc. is the better investment when it comes to estimate revisions.

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Other Penumbra and Inc. Grades

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

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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 Penumbra and Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Penumbra or Inc. Stock?

Overall, Penumbra, Inc. stock has a Value Score of 3, Growth Score of 40 and Estimate Revisions Score of 56.

Comparing Penumbra and 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.

Learn More About A+ Investor

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.



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