Key Takeaways
- • ARK Venture Fund holds a $69 million OpenAI position representing 5.26% to 5.41% of the fund's $1.3 billion portfolio, the largest OpenAI stake among major public funds.
- • OpenAI ranks as the fund's second-largest holding as of late August 2026, behind SpaceX (7.54%) and ahead of Anthropic (3.86%), with these three companies alone accounting for roughly one-fifth of total portfolio exposure.
- • ARK invested at least $250 million into OpenAI's October 2024 funding round and first disclosed the position in April 2024 when it represented approximately 4% of a smaller fund base.
- • The fund launched tokenized share trading on Ethereum in September 2026, allowing eligible US investors to purchase ARKVX shares using USDC stablecoin, while maintaining the same portfolio structure and quarterly redemption caps of approximately 5%.
- • Private companies represent 62% to 78% of the ARKVX portfolio, creating concentrated exposure to illiquid technology holdings with infrequent valuation updates compared to publicly traded securities.
Summary
Cathie Wood's ARK Venture Fund maintains the largest OpenAI position among major public funds, holding $69 million in the artificial intelligence company as of mid-2026. The position constitutes between 5.26% and 5.41% of the fund's net assets, positioning OpenAI as the second-largest holding in the $1.3 billion fund after SpaceX, which represents 7.54% of the portfolio. Anthropic rounds out the top three holdings at 3.86%, with these three private technology companies collectively representing approximately one-fifth of total fund exposure.
ARK's OpenAI investment built over time through strategic capital deployment. The fund first disclosed its OpenAI stake in April 2024, when the position represented roughly 4% of what was then a smaller fund base. Subsequently, ARK committed at least $250 million to OpenAI's October 2024 funding round, substantially expanding its exposure to the ChatGPT developer.
In September 2026, ARK broadened investor access to the fund through a tokenization initiative that went live on September 24. Eligible US investors can now acquire ARKVX shares directly on the Ethereum blockchain using USDC, the dollar-pegged stablecoin, while the underlying portfolio structure and performance metrics remain unchanged. The fund, which launched in September 2022 with a $500 minimum investment threshold to accommodate retail buyers, maintains quarterly redemption caps typically set at 5% of outstanding shares.
The concentration in private holdings—spanning 62% to 78% of the portfolio depending on the reporting date—reflects a structural challenge for venture-focused funds: illiquid securities update valuations less frequently than public equities, creating valuation lag and reducing portfolio transparency for investors.
ARK's OpenAI investment built over time through strategic capital deployment. The fund first disclosed its OpenAI stake in April 2024, when the position represented roughly 4% of what was then a smaller fund base. Subsequently, ARK committed at least $250 million to OpenAI's October 2024 funding round, substantially expanding its exposure to the ChatGPT developer.
In September 2026, ARK broadened investor access to the fund through a tokenization initiative that went live on September 24. Eligible US investors can now acquire ARKVX shares directly on the Ethereum blockchain using USDC, the dollar-pegged stablecoin, while the underlying portfolio structure and performance metrics remain unchanged. The fund, which launched in September 2022 with a $500 minimum investment threshold to accommodate retail buyers, maintains quarterly redemption caps typically set at 5% of outstanding shares.
The concentration in private holdings—spanning 62% to 78% of the portfolio depending on the reporting date—reflects a structural challenge for venture-focused funds: illiquid securities update valuations less frequently than public equities, creating valuation lag and reducing portfolio transparency for investors.
Go deeper than the headline
Research every firm in this story, track the ones that matter and get the daily briefing — free for 7 days.