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3 Monster Stocks to Hold for the Next 10 Years

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None of these three stocks are conventionally cheap, but they all have huge growth potential from megatrends already in place, making them attractive stocks for investors to buy for the long term. Here's why electronic design automation (EDA) company Synopsys (NASDAQ: SNPS), design and product management software company PTC (NASDAQ: PTC), and advanced composite materials company Hexcel (NYSE: HXL) are stocks worth taking long-term positions on.

An AI growth stock to buy

Synopsys makes EDA software engineers use to design and test silicon chips, which naturally includes AI-driven semiconductors. In fact, management describes Synopsys as "an AI company" that's "in the early stages of the AI transition."

While there is no end to companies looking to jump on the AI bandwagon, there is a strong case for AI applications being the catalyst for long-term growth at Synopsys. While the company's traditional end-market customers are in semiconductors and electronics, the growth of AI applications is leading to a surge in AI chip design. Not only is that good news for demand coming from Synopsys's traditional customers, but it also broadens the growth opportunity to encompass areas like automotives, aerospace, healthcare, and software.

That kind of logic is also behind its $35 billion acquisition of engineering simulation software company Ansys (NASDAQ: ANSS), set to close in the first half of 2025. The two have long been partners, as Ansys's data from its simulation and optimization software is complementary to EDA software companies.

However, Ansys tends to have a broader customer base, with high-tech customers only responsible for 31% of its annual contract value (ACV) -- aerospace, automotive, and industrial equipment together make up almost 50% of Ansys ACV.

A happy investor.
Image source: Getty Images.

Still, as the growth of AI creates more demand for chips across many different industries, many of Ansys's non-high-tech customers are likely to grow into Synopsys customers. Trading on almost 48 times expected free cash flow (FCF) in 2025, Synopsys is not a superficially cheap stock, but Wall Street analysts expect mid-teens earnings growth and 30% annual growth in FCF.

In addition, Synopsys's acquisition of Ansys will open up new markets and create an integrated EDA and simulation software company positioned to benefit from AI-related spending over the next decade.

Buy the dip in this growth stock

Speaking of Ansys, computer-aided design (CAD) and product lifecycle management (PLM) company PTC is also a company partner. Ansys has technical relationships with CAD companies like PTC to facilitate data transfer between the simulation/analysis and CAD.