Quick Answer
In mid May 2026, Cathie Wood Ark Invest sold large positions in legacy AI chip names AMD, Taiwan Semiconductor (TSM) and Teradyne (TER) and redeployed roughly 79 million USD over two days into newly public AI hardware company Cerebras Systems (CBRS).
On May 15, 2026 alone, Ark trimmed about 24.6 million USD of TSM, 12.4 million USD of Teradyne and 5.9 million USD of AMD across ARKK and ARKW.
The pattern is classic Ark: rotate mature, slower growth tech into a pure play, hyper growth disruptor at the bleeding edge of AI infrastructure.
What Ark Sold This Week
- Taiwan Semiconductor (TSM): 59,009 shares sold, roughly 24.6 million USD.
- Teradyne (TER): roughly 12.4 million USD divested.
- Advanced Micro Devices (AMD): 13,148 shares sold, roughly 5.9 million USD.
These trims came from the flagship ARK Innovation ETF (ARKK) and the ARK Next Generation Internet ETF (ARKW), and they continued a multi day pattern of reducing exposure to incumbents in the AI supply chain.
What Ark Bought Instead
The proceeds went almost entirely into Cerebras Systems (CBRS), the wafer scale AI chipmaker that completed a blockbuster Nasdaq IPO earlier in May.
- May 14, 2026: Ark bought roughly 32.8 million USD of CBRS the day after the IPO priced at 185 USD.
- May 15, 2026: Ark added 149,176 more shares of CBRS, worth more than 46.4 million USD as the stock surged past 300 USD.
Combined, the position now ranks among the largest new buys Ark has executed inside an IPO window in the past three years.
Why Cerebras Specifically?
Cerebras builds the Wafer Scale Engine, a single chip the size of a dinner plate purpose built for training and serving very large AI models. Ark thesis is that:
- Inference demand from foundation model providers is growing faster than GPU supply.
- Wafer scale architectures sidestep the bandwidth bottlenecks of multi GPU clusters.
- A reported multi billion dollar backlog with hyperscalers and Middle Eastern AI buyers gives Cerebras early scale.
In Ark framework, Cerebras is a "next platform" bet, similar to how Ark treated Nvidia (before exiting) and Tesla in earlier cycles.
Why Sell AMD, TSM and Teradyne?
Ark has not abandoned the AI chip story. It is rebalancing the AI chip story.
- AMD: Strong AI accelerator roadmap, but Ark sees slower share gain against Nvidia and now Cerebras at the high end.
- TSM: The world critical foundry, but Ark has flagged geopolitical risk (Taiwan, US export controls) for years and tends to trim into strength.
- Teradyne: Semiconductor test equipment, deeply cyclical, and Ark may believe the upgrade cycle from advanced packaging tests has peaked for now.
Is This a Risky Bet?
Cerebras carries real, well documented risks:
- Customer concentration. A majority of revenue comes from a small number of customers, with heavy exposure to one Middle Eastern AI buyer.
- Valuation. The stock more than doubled in days, pricing in years of execution.
- Competition. Nvidia, AMD, Google TPU and Amazon Trainium all target the same workloads.
- Lockups and dilution. Post IPO lockup expirations can pressure the stock in the next six to twelve months.
Ark holdings are designed to be volatile. Cathie Wood public five year price targets routinely assume aggressive disruption curves that may or may not play out.
How ARKK Has Actually Performed
The headline performance reality is sobering. Over the last five years, ARKK has materially trailed the S and P 500, and Ark has had a notable habit of selling winners (Nvidia, Apple) just before major rallies. Critics argue Ark trading pattern, rotating into the newest IPO at peak excitement, has structurally hurt long term returns.
Defenders point to the 2020 run, ARKK concentrated bets on disruptive innovation, and the genuine pipeline of post pandemic tech IPOs Ark has identified early.
What This Tells Retail Investors
- Ark is publicly telegraphing a pivot from legacy AI chip names to next generation hardware.
- Position sizing matters: even at 79 million USD, Cerebras remains a single name in a diversified ETF.
- Following Ark trades is easy, but the volatility and drawdowns are also part of the package.
- If you are interested in CBRS, read the S-1, the customer concentration disclosures and any post IPO 8-K filings before buying.
The Takeaway
Cathie Wood mid May 2026 reshuffle is a textbook Ark move. She is treating AMD, TSM and Teradyne as the "old" AI trade and Cerebras as the "new" AI trade, and she is sizing the new position aggressively at a moment of peak excitement. For long term investors, the lesson is less about copying the trade and more about understanding the playbook: high conviction, high concentration, high volatility, and a willingness to be very wrong on the way to being eventually right.
Financial disclaimer
This article is for general information only and is not investment advice. ETF positions, IPO performance and stock prices can change very quickly. Always do your own research, consider your risk tolerance, and consult a licensed financial adviser before making investment decisions. See the full site disclaimer.
Frequently Asked Questions
Did Ark sell all of its AMD and TSM?
No. Ark trimmed both positions but still holds meaningful stakes across its ETFs as of mid May 2026.
What is Cerebras Systems?
A Sunnyvale based AI hardware company that builds wafer scale chips for training and serving very large AI models.
How can I track Ark daily trades?
Ark publishes a daily trade report each evening on its website and via email subscription.
