Shockwave Medical (NASDAQ: SWAV), Bio-Techne (NASDAQ: TECH), and Ginkgo Bioworks (NYSE: DNA) may not be well-known to a lot of investors, but all three healthcare stocks could double over the next few years thanks to their strong growth potential.

The reason these three may not be familiar names is that they don't sell their products to the general public, but instead to healthcare professionals and pharmaceutical companies. Bio-Techne and Ginkgo Bioworks are good examples of pick-and-shovel companies in the gene-editing industry, while Shockwave Medical sells its products to healthcare systems for their use on patients.

Let's see what looks so promising about these three companies.

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Source Fool.com