The Ark Innovation ETF (NYSEMKT: ARKK) managed by Cathie Wood is one of the most closely followed actively managed funds in the world.

Wood rose to prominence in 2020 when all six of Ark Invest's active exchange-traded funds (ETFs) saw their prices soar more than 100%. The flagship Ark Innovation ETF climbed 148.7% that year. Wood and her team seek out companies developing disruptive technologies in the areas of genomics, automation, artificial intelligence (AI), and finance, among others, for the Ark Innovation fund.

But just four stocks out of 33 total holdings make up the bulk of the fund's investments. These are Ark Invest's biggest bets. And if Wood is right, these four could turn out to become much bigger companies than they already are today. Let's find out a bit more about these four stocks.

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Source Fool.com