Cathie Wood doesn't take any trading days off. The co-founder and CEO of Ark Invest publishes her transactions for the family of exchange-traded funds she manages. She didn't make a lot of moves on Wednesday, but the ones she did make are worth watching.

Reddit (NYSE: RDDT), Intellia Therapeutics (NASDAQ: NTLA), and PagerDuty (NYSE: PD) were among the four stocks that Wood bought on Wednesday. She added to established positions in all three cases. Let's take a closer look.

It didn't take long for Wood to own a piece of Reddit. She bought shares of the online community board the day it went public three months ago. She added to the modest stake two months later, the day after it posted blowout quarterly results in its first financial update as a public company. This week is the third time that Ark Invest is putting more money to work in Reddit, even if it remains one of Wood's smallest overall holdings.

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Source Fool.com