Ark Invest expands holdings in Amazon-backed X-Energy
Ark Invest has significantly increased its stake in X-Energy Inc across the ARKK, ARKQ, and ARKX ETFs. The Amazon-backed nuclear company raised $1 billion in its April 2026 IPO but has since fallen 53% from its listing price. Ark's current holdings total over $90 million across the three funds.
*this image is generated using AI for illustrative purposes only.
Ark Invest, led by Cathie Wood, has aggressively increased its holdings in X-Energy Inc across three exchange-traded funds, signaling a strong conviction in the nuclear energy sector. The firm has purchased shares of the recently public company in four straight trading sessions, excluding the recent weekend of July 11 and July 12. This buying activity spans the Ark Innovation ETF (ARKK), the Ark Autonomous Technology & Robotics ETF (ARKQ), and the Ark Space & Defense Innovation ETF (ARX).
X-Energy Inc, which is backed by Amazon.com Inc, listed on the NASDAQ in late April 2026. The company raised approximately $1 billion through its initial public offering, pricing shares at $23, which was above the initial range of $16 to $19. The stock opened for trading at $30.11 and closed its first day at $29.20. Since the IPO, Ark Invest has added the stock to its portfolios on multiple occasions, with activity dating back to April 2026 and intensifying from June 25 onward.
The asset manager's strategy involves building positions in what it identifies as disruptive technology. X-Energy represents Ark's latest bet on nuclear energy, a category where the firm already holds stakes in companies such as Oklo Inc and BWX Technologies. The sector has garnered attention in 2026 due to factors including the Trump administration's policies, growing demand for AI data centers, and the search for power sources to meet increased energy needs.
As of Thursday, the current position sizes for the three Ark ETFs show significant exposure to the nuclear company. The Ark Innovation ETF holds 4,091,632 shares valued at $61.6 million, making it the 34th largest position and accounting for 0.95% of the fund. The Ark Autonomous Technology & Robotics ETF holds 1,311,793 shares worth $19.8 million, also the 34th largest position at 0.98% of the ETF. The Ark Space & Defense Innovation ETF holds 608,926 shares valued at $9.2 million, representing the 29th largest position and 1.10% of the fund.
| ETF | Shares Held | Value ($ million) | Rank | % of ETF |
|---|---|---|---|---|
| ARKK | 4,091,632 | 61.6 | 34 | 0.95% |
| ARKQ | 1,311,793 | 19.8 | 34 | 0.98% |
| ARKX | 608,926 | 9.2 | 29 | 1.10% |
The accumulation of shares comes during a period of sell-off for X-Energy stock in its post-IPO phase. On Thursday, shares traded at $13.52, hitting new intraday lows of $13.29. The stock has traded as high as $37.10 since its public debut and is currently down 53% from its initial listing price. Additional purchases in the coming days could elevate the stock's position within the Ark funds' holdings lists.
Will Ark Invest continue to accumulate X-Energy shares if the stock price declines further below the IPO price?
How might the Trump administration's specific policy shifts in late 2026 impact the regulatory landscape for X-Energy's reactor deployments?
What potential commercial partnerships with AI data center operators could emerge to validate X-Energy's growth trajectory?
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