Ark Invest didn't wait long to add shares of newly public X-Energy after the company's initial public offering. Here's a look at which funds from the Cathie Wood-led company took early bets on the now public company backed by Amazon.

Ark Buys X-Energy Stock

X-Energy, an Amazon-backed nuclear company, held its highly anticipated IPO on Friday with shares priced at $23.

That was higher than the initial pricing range of $16 to $19 and shares opened for trading at $30.11, showing the early demand and excitement for the company. The stock later closed slightly down at $29.20 on Friday.

Ark Invest bought shares in X-Energy across several of its ETFs, according to a daily email of transactions sent out Friday night. Here are the funds used to buy XE shares.

• Ark Innovation ETF (BATS:ARKK): Bought 2,808,454 shares, 0.88% of the fund

• Ark Autonomous Technology & Robotics ETF (BATS:ARKQ): Bought 866,770 shares, 0.91% of the fund

• Ark Space & Defense Innovation ETF (BATS:ARKX): Bought 345,701 shares, 0.92% of fund

These marked the initial purchases and could be the first of many. Investors will find out if Wood and the Ark Invest team added to these positions on Monday with the night's daily email of transactions.

Wood Bets On Nuclear Energy

X-Energy becomes the latest bet on nuclear energy by Wood and Ark Invest. The team currently holds positions in several stocks that fit the category, including Oklo and BWX Technologies.

The nuclear sector has gotten plenty of attention in 2026 thanks to the Trump administration, growing demand for AI data centers, and the potential power sources that will fuel the increased energy needs.

Over the years, Ark Invest has invested in what it calls disruptive technology. This may include nuclear energy, and X-Energy could be Ark’s latest investment to get ahead of the growing trend.

Price Action: X-Energy shares surged 23.2% to $35.98 on Monday.