Asset manager Cathie Wood also bought shares of her flagship fund's No. 3 holding and shares of a cryptocurrency exchange.

Ark also sold four stocks, including a defense contractor and a financial management software company.

Wood's flagship Ark Innovation ETF has plunged 54% so far this year, as its young technology companies have slumped.

It also purchased a 3D printing company and sold a major digital entertainment company.

After her slump in 2021/22, some have come to question Wood's prowess. But her five-year track record shines.

Ark's Wednesday purchases included $12 million of Shopify and $10 million of Zoom. Ark sold a major entertainment provider.

Check out the latest news and performance numbers from the top technology and MMANG stocks like Amazon, Apple, Nvidia, Google, Microsoft, Intel, Roblox and more.

ARK ETFs bought shares of Roku, Zoom, Sea and Roblox Friday, but Ark also sold shares of Palantir.

Ark on Wednesday bought 454,667 shares of Roblox as the stock slumped 27% after a weaker-than-expected earnings report.

"I believe we were late to the market and US vaccination was driven by what was available and shown to work," said Novavax CEO Stanley Erck.

Ark Innovation ETF has fallen 49% this year. Asset manager Cathie Wood just added a bunch of shares of graphics-chip specialist Nvidia.

"In FQ1, bit shipments are now expected to decline sequentially, and we expect significant sequential declines in revenue and margins," Micron said.