I read about that on a blog I follow on Xiao Hong Shu

And googling "ARK funds bought CBRS on 5/20" returns this:

 

Yes, Cathie Wood’s ARK funds actively added to their position in Cerebras Systems Inc. ($CBRS). [1]

On Wednesday, May 20, the ARK Innovation ETF (ARKK) purchased 82,779 shares of CBRS, representing a total transaction value of roughly $25.13 million. [1, 2]

This purchase is part of a larger ongoing strategy by ARK to accumulate shares of the AI chipmaker following its blockbuster public debut. To fund these Cerebras acquisitions and other tech investments, the firm has been actively trimming its stakes in established semiconductor companies like Advanced Micro Devices ($AMD). [1, 2, 3, 4, 5]

For more details on ARK’s daily buying and selling, you can review the official daily trade disclosures on ARK Invest.