Favorable Results and Improved Guidance Lifted Thermo Fisher Scientific (TMO) in Q3

Parnassus Investments, an investment management company, released the “Parnassus Core Equity Fund” third-quarter 2025 investor letter. A copy of the letter can be downloaded here. The S&P 500 Index surged in the third quarter, driven by investor optimism that grew on expectations of monetary easing, strong consumer demand, and solid corporate earnings. The Fund (Investor Shares) returned 2.57% (net of fees) in the quarter, trailing the S&P 500 Index’s 8.12% return. YTD, the fund returned 9.89% compared to 14.83% for the index. In addition, please check the fund’s top five holdings to know its best picks in 2025.

In its third-quarter 2025 investor letter, Parnassus Core Equity Fund highlighted stocks such as Thermo Fisher Scientific Inc. (NYSE:TMO). Thermo Fisher Scientific Inc. (NYSE:TMO) offers life sciences solutions, analytical instruments, specialty diagnostics, laboratory products, and biopharma services. The one-month return of Thermo Fisher Scientific Inc. (NYSE:TMO) was -3.69%, and its shares gained 8.83% of their value over the last 52 weeks. On December 22, 2025, Thermo Fisher Scientific Inc. (NYSE:TMO) stock closed at $575.70 per share, with a market capitalization of $216.3 billion.

Parnassus Core Equity Fund stated the following regarding Thermo Fisher Scientific Inc. (NYSE:TMO) in its third quarter 2025 investor letter:

“Thermo Fisher Scientific Inc. (NYSE:TMO), a global provider of pharmaceutical research instruments and services, recovered from being oversold earlier in the year, aided by favorable financial results and guidance that exceeded muted expectations.”

Thermo Fisher Scientific’s (TMO) Dividend: Steady Payouts in a Growing Market

Thermo Fisher Scientific Inc. (NYSE:TMO) is in 26th position on our list of 30 Most Popular Stocks Among Hedge Funds. According to our database, 121 hedge fund portfolios held Thermo Fisher Scientific Inc. (NYSE:TMO) at the end of the third quarter, up from 117 in the previous quarter. While we acknowledge the risk and potential of Thermo Fisher Scientific Inc. (NYSE:TMO) as an investment, our conviction lies in the belief that some AI stocks hold greater promise for delivering higher returns and doing so within a shorter time frame. If you are looking for an AI stock that is more promising than Thermo Fisher Scientific Inc. (NYSE:TMO) and that has 10,000% upside potential, check out our report about this cheapest AI stock.

In another article, we covered Thermo Fisher Scientific Inc. (NYSE:TMO) and shared the list of best S&P 500 stocks to buy. In Q3 2025, Thermo Fisher Scientific Inc. (NYSE:TMO) was a solid performance contributor to Harding Loevner Global Equity Strategy. In addition, please check out our hedge fund investor letters Q3 2025 page for more investor letters from hedge funds and other leading investors.

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Disclosure: None. This article is originally published at Insider Monkey.