ARK Significantly Increases Holdings in Kratos Defense and Cerebras, Dramatically Reduces Robinhood
Claire Weston
ARK posted a net $3.05 million buy this week, concentrating firepower on defense stock Kratos and AI-chip maker Cerebras while dumping Robinhood — a clear shift from online brokerage toward hard tech.
Where did ARK put its money this week?
The biggest buy was defense firm Kratos (KTOS) — 261,370 shares across ARKX, ARKK, and ARKQ, totaling $16.96 million.
This means → ARK is treating autonomous defense and aerospace as its next high-conviction bet, with a single-week outlay far above any other name.
The second-largest buy was AI-chip company Cerebras Systems (CBRS) — 35,950 shares via ARKK and ARKW, worth $9.22 million.
In plain terms = Cerebras builds chips purpose-built for AI workloads. ARK already bought heavily on May 20 and May 22, then added again this week — three moves in ten days leaves little doubt about conviction.
E-commerce and biotech on the buy list too?
ARK bought 24,190 shares of Amazon (AMZN) through ARKK and 25,910 shares of Tempus AI (TEM) through ARKG.
It also added 19,450 shares of Futu Holdings (FUTU) via ARKF and a smaller 2,450-share position in genomics firm Twist Bioscience (TWST).
This reflects a diversified secondary layer — defense and AI chips are the headline bets, but ARK is also spreading capital across e-commerce, fintech, and genomics rather than going all-in on one theme.
Why the heavy sell-off in Robinhood?
The week's largest sell was Robinhood (HOOD) — 158,760 shares offloaded via ARKK and ARKF, raising $13.35 million.
This means → ARK is deliberately shrinking its online-brokerage exposure to free up capital for defense and AI hardware.
Put simply = Robinhood earns from retail trading commissions; Kratos and Cerebras earn from defense contracts and AI compute. ARK chose the latter.
What else got trimmed?
Teradyne (TER) was the second-largest sell — 40,740 shares via ARKK, ARKQ, and ARKX, raising $15.17 million. ARK had already trimmed Teradyne on May 20.
Also sold: Kaspi.kz (KSPI) 12,290 shares, Intercontinental Exchange (ICE) 5,980 shares, and AMD 5,300 shares — continuing a pattern of repeated small AMD trims.
This signals fading interest in semiconductor test equipment (Teradyne's core business) and legacy chipmakers (AMD), with capital rotating from "tools that make chips" toward "endpoints that use them."
Content is for reference only, not financial advice.