ARK Venture Fund’s $69 Million OpenAI Stake Tops Major Funds

Cathie Wood’s ARK Venture Fund has built a significant stake in OpenAI, holding a $69 million position as of mid-2026. This makes it the largest share among major public funds invested in the ChatGPT maker. The OpenAI investment represents roughly 5.26% to 5.41% of the fund’s net assets, depending on the reporting date. The ARKVX fund, which trades under the ticker ARKVX, managed around $1.3 billion in total assets as of mid-2026.

As of August 31, 2026, SpaceX held the top spot at 7.54% of the portfolio, followed by OpenAI at 5.26%, and Anthropic at 3.86%. Other top holdings include prediction market Kalshi and payments company Stripe, based on portfolio snapshots from late August and September 2026. Private companies account for between 62% and 78% of the ARKVX portfolio, with the figure shifting by reporting date.

ARK first disclosed its OpenAI investment in April 2024, when the position represented roughly 4% of a smaller portfolio. The fund invested at least $250 million into OpenAI’s October 2024 funding round. Launched in September 2022, the ARKVX fund has a minimum investment of $500, opening the door to retail buyers who do not meet accredited investor thresholds.

On September 24, 2026, ARK announced a tokenization initiative for the fund, allowing eligible US investors to acquire ARKVX shares on Ethereum using USDC, the dollar-pegged stablecoin. The portfolio structure and performance measures remain the same, with redemptions capped quarterly, typically at 5% of shares. SpaceX, OpenAI, and Anthropic alone account for roughly a fifth of the portfolio, concentrating exposure across a small group of private technology companies. Investors should treat the $69 million figure as a point-in-time snapshot rather than a live price.