ARK Venture Fund holds a $69 million OpenAI position, the largest allocation to the ChatGPT maker among major public funds, according to portfolio disclosures from ARK Invest.

The position represents 5.26% to 5.41% of ARKVX's net assets, depending on the snapshot date. As of August 31, 2026, OpenAI ranks as the second-largest holding in the fund, behind SpaceX at 7.54%, with Anthropic at 3.86% in third place. Kalshi, the regulated prediction market operator, and payments company Stripe also sit among the top holdings based on portfolio snapshots from late August and September 2026.

What does the concentration mean for portfolio risk?

SpaceX, OpenAI, and Anthropic together account for roughly a fifth of ARKVX, concentrating exposure across a small group of private technology companies. Private holdings do not trade on an exchange, so marked values update less often than public stocks. The $69 million figure should be read as a point-in-time snapshot rather than a live price.

Private companies account for between 62% and 78% of the ARKVX portfolio, with the figure shifting by reporting date. The fund managed approximately $1.3 billion in total assets as of mid-2026.

How did ARK build the OpenAI bet?

ARK first disclosed its OpenAI investment in April 2024, when the position represented roughly 4% of what was then a smaller portfolio. The firm subsequently committed at least $250 million to OpenAI's October 2024 funding round.

ARKVX launched in September 2022 with a $500 minimum investment, opening access to retail buyers who do not meet accredited investor thresholds for income or net worth. The structure distinguishes ARKVX from traditional venture vehicles that exclude non-accredited participants, and it has positioned the fund as a bellwether for retail-accessible private-market exposure.

What changes with the Ethereum tokenization?

On September 24, 2026, ARK announced a tokenization initiative for ARKVX. Eligible US investors can now acquire fund shares on Ethereum using USDC, the dollar-pegged stablecoin. Portfolio composition and performance measures remain unchanged from the off-chain structure.

Redemptions remain capped on a quarterly basis, typically at 5% of shares outstanding. The arrangement places ARKVX alongside a small but growing cohort of regulated funds settling subscription and redemption flows on public blockchains. Operational implications are still working through transfer-agent and custody workflows, with reconciliation between on-chain share records and traditional fund administration the central unresolved question.

What is the operational footprint?

• Fund ticker: ARKVX
• Total assets: ~$1.3 billion (mid-2026)
• Minimum investment: $500
• Top holdings: SpaceX (7.54%), OpenAI (5.26%), Anthropic (3.86%), Kalshi, Stripe
• Private-company share: 62%–78% of portfolio
• Settlement token: USDC on Ethereum
• Redemption cap: 5% per quarter

The tokenization move follows a broader pattern of fund issuers using public chains to extend access without altering fund economics. Quarterly redemption limits and US-only investor eligibility keep the vehicle within existing fund-distribution rules. The on-chain distribution channel does, however, raise novel questions for transfer agents, auditors, and broker-dealers about how blockchain-settled subscriptions interact with the regulatory perimeter that governs interval-fund share issuance.