XE
New favorite, same old Cathie
authority figure Cathie Wood is doing what Cathie Wood does: leaning hard into a story before the rest of the market has finished arguing about it. Ark Invest has been buying X-Energy shares across ARKK, ARKQ, and ARX, turning the recent nuclear IPO into one of its more visible new bets.
Why this matters to your portfolio
This isn’t just a random ETF shopping spree. X-Energy sits right in the middle of the “AI needs absurd amounts of power” trade, which has made nuclear stocks feel a little less like sci-fi and a little more like utilities with a caffeine problem. Ark’s purchases suggest the fund still thinks the long-term nuclear story has legs — even as XE has fallen sharply from its post-IPO highs.
What’s been happening:
- Ark has been adding XE repeatedly since the IPO window in late April 2026.
- Buying picked up again in late June and early July.
- The stock has been sliding anyway, which is very on-brand for a newly public name that the market is still trying to price.
Big picture
For investors, the takeaway is less “buy because Cathie bought” and more “the smart-money crowd is still circling nuclear.” X-Energy now has a fresh backer, a messy post-IPO chart, and a sector that keeps getting more interesting as data-center power demand goes full monster mode. Big picture: this is the kind of stock that can stay volatile longer than your patience.