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Have you ever experienced the regret of an expensive purchase and the sinking feeling that follows? Overvalued stocks can provoke the same emotions. When a stock’s price far exceeds its fundamental earnings and revenue, or it boasts a high P/E ratio compared to its peers, it may raise questions. In this article, we explore whether Thermo Fisher Scientific Inc. (TMO) fits this description, and the reasons behind it. Will it turn out to be overvalued?

In this article, we dive into why Thermo Fisher Scientific Inc. could be considered overvalued as of February 12, 2026, based on AAII’s Value Score and Grade.

Key takeaways:

• Comparing potential overvaluations in the Life Sciences Tools & Services sector
• Utilizing the AAII Value Score and Grade to evaluate if (TMO) is overvalued
• The reasons why Thermo Fisher Scientific Inc. might be overvalued: an analysis of key metrics

What Is an Overvalued Stock?

Overvalued stocks arise from high expectations, past growth, and demand. Investors compare them with peers but not all are bad investments. Factors like reversion to mean and analyst expectations affect price volatility. Despite risks, growth investors may find some appealing for long-term potential. Effective methods exist to identify overvalued stocks.

How to Use the AAII Value Grade to Screen for Overvalued Stocks

The AAII Value Grade combines six key valuation metrics, including P/S ratio, P/E ratio, EV/EBITDA ratio, shareholder yield, P/B ratio, and P/FCF ratio. AAII members use this composite valuation to find cheap or expensive stocks, with grades ranging from A to F. Stocks are ranked based on percentile rankings for each metric, and the average ranking places them in quintiles from cheapest (A grade) to most expensive (F grade). Follow this link to learn more about AAII’s Value Score and Grade. Subscribe to A+ Investor 100% risk free with our 90-day money-back guarantee.

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Thermo Fisher Scientific Inc.’s Value Grade

As of February 12, 2026, Thermo Fisher Scientific Inc. has a price-to-sales ratio of 4.43, which is 41.1% higher than the industry median at 3.14. Its price-earnings ratio is 29.4 and its EV/EBITDA ratio is 21.8.

Thermo Fisher Scientific Inc.’s shareholder yield is 1.3%, higher than the Life Sciences Tools & Services industry average at -1.4%.

Finally, its price-to-book ratio is 3.75. and its price-to-free-cash-flow ratio is 35.2. Stocks with a Value Score from 0 to 20 are considered deep value, those with a score between 21 and 40 are considered a value and so on.

Thermo Fisher Scientific Inc.’s Value Score is 21, which translates to a Value Grade of D and is considered to be Expensive.

What Investors Should Know About Thermo Fisher Scientific Inc. (TMO) Valuation

Valuation assessments often vary, but the AAII Stock Grades offer a consistent method for evaluating stocks. The chart provided above allows you to compare the valuation metrics of Thermo Fisher Scientific Inc. against the industry median, giving you a clear perspective on how it stands in comparison.

Data as of February 12, 2026. By considering these metrics, we determine if a stock is under/overvalued. In this case, the composite score shows that Thermo Fisher Scientific Inc. is Expensive at this time.



AAII is not a registered investment adviser or a broker/dealer. Readers are advised that articles are provided solely for informational purposes and should not be construed as an offer to sell or the solicitation of an offer to buy securities. Read the full AAII disclaimer.