Cathie Wood’s ARK ETF published their daily trades for Wednesday, May 13th, 2026, revealing a continued focus on reshaping its portfolio with notable moves in the biotech sector.
The most significant transaction of the day was ARK’s purchase of Natera Inc (NASDAQ:NTRA) shares. The firm acquired a total of 17,316 shares, split between its ARKK and ARKG ETFs, amounting to a total dollar value of $3,536,100. This marks a continuation of ARK’s investment interest in Natera, following purchases in recent days.
On the selling side, ARK offloaded 14,418 shares of Twist Bioscience Corp (NASDAQ:TWST), with shares sold through both the ARKK and ARKG ETFs. The total dollar value of this transaction was $806,687. This sale follows a series of recent divestments in Twist Bioscience, indicating a strategic reduction in ARK’s position in the company.
ARK also reduced its holdings in CareDx Inc (NASDAQ:CDNA), selling 16,398 shares for a total of $350,917. This continues a trend of selling CareDx shares over the past week, suggesting a possible strategic shift away from this stock.
Additionally, ARK sold 12,372 shares of Adaptive Biotechnologies Corp (NASDAQ:ADPT) through its ARKG ETF, totaling $168,630. This sale adds to previous reductions in Adaptive Biotechnologies shares earlier this month.
These trades reflect ARK’s ongoing strategy of reallocating capital within the biotech sector, with a focus on increasing its stake in Natera while reducing its positions in other companies such as Twist Bioscience and CareDx.
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