How to Invest in OpenAI Through ARKK — What It Actually Means
This article is for informational purposes only and is not investment advice. Nothing here should be taken as a recommendation to buy or sell any security.
What Just Happened (And Why Everyone Is Searching “How to Invest in OpenAI”)
On March 31, 2026 — the same day OpenAI closed what became the largest private capital raise in history — ARK Invest purchased approximately $240 million worth of OpenAI shares across three of its publicly traded ETFs. For retail investors asking how to invest in OpenAI before a potential IPO, buying into ARKK, ARKW, or ARKF is now the most accessible route available.
The breakdown: ARKK (ARK Innovation ETF) got the largest slice at roughly $175 million, representing 254,476 shares and a 3.11% portfolio weight. ARKW (ARK Next Generation Internet ETF) received about $43 million, and ARKF (ARK Blockchain & Fintech Innovation ETF) about $22 million. Both ARKW and ARKF sit at approximately 3% of their respective funds.
OpenAI’s implied share price in this transaction: around $688.43. The company’s post-money valuation after the round: $852 billion. OpenAI’s prior round — $40 billion in March 2025 — was the previous record for a private capital raise. This one was three times larger at $122 billion.
If you have a brokerage account, you can buy a piece of ARKK before the market opens tomorrow. That’s the headline. What the headline leaves out is what you actually need to know.
What You Actually Own: The OpenAI ARK ETF 3% Math
The short answer: Buying ARKK gives you indirect OpenAI exposure equal to roughly 3.11% of your investment. On a $1,000 purchase, that’s approximately $31 of OpenAI — the remaining $969 is spread across 44 other holdings including Tesla (10%), biotech, and fintech positions.
The arithmetic that breathless coverage tends to skip is worth running yourself.
OpenAI is roughly 3.11% of ARKK’s portfolio. Put $1,000 into ARKK, and your OpenAI exposure is about $31. Your other $969 is spread across 44 other holdings — Tesla is the largest at just over 10%, followed by positions in companies like CRISPR Therapeutics, Shopify, and Tempus AI.
Every ETF works this way. When a fund manager adds a 3% position in anything, a $1,000 investment gives you $30 of that thing.
Scale it up: invest $10,000 and your dollar buys $311 of OpenAI exposure. At $50,000, you’re at $1,550.
For most retail investors excited about this, the honest question is worth sitting with: are you actually buying exposure to OpenAI’s future, or are you mostly buying the other 97% of ARKK — Tesla at 10%, a mix of biotech and fintech bets, and an actively managed strategy that’s had a rough few years?
No wrong answer. But you should know which question you’re answering before you place the trade. If you want to understand how AI companies actually make money before committing capital, our breakdown of AI tools and trust tiers in 2026 is a useful place to start.
OpenAI’s Finances: The Numbers Worth Sitting With
OpenAI’s revenue growth is genuinely remarkable. In 2024, the company brought in roughly $6 billion in revenue. By 2025, annualized revenue crossed $20 billion. By February 2026, the run rate hit $25 billion, and the company is targeting $30 billion for the full year.
At 900 million weekly ChatGPT users and more than 50 million paid subscribers, the product has real scale. That part isn’t hype.
The losses, though, are growing faster than the revenue.
OpenAI’s own internal projections — reported by The Information and widely cited by financial outlets — forecast $14 billion in losses for 2026 alone. Cumulative losses from 2023 through 2028 are projected at $44 billion. The first year of profitability is estimated around 2029, if the revenue trajectory holds.
At $852 billion, that’s roughly 28 times OpenAI’s projected 2026 revenue — a multiple built on the company’s own unaudited internal forecast for a year it hasn’t finished yet.
Here’s the thing most coverage glosses over: OpenAI has not released audited public financials. These numbers come from internal documents that have been reported on, not from a 10-K or a prospectus. When a traditional public company reports revenue, an independent auditor signs off on it. OpenAI’s numbers haven’t been independently verified in the same way. It means your dollar is working with a different grade of information than you’d have for any company on a public exchange — and that distinction matters.
The ARKK Track Record Retail Investors Shouldn’t Ignore
ARKK isn’t a new fund. It launched in 2014 and had a legendary run through 2020 and into early 2021, when it became the most talked-about ETF in the country. At its peak in February 2021, ARKK traded at $159.70 per share.
Then it lost more than half its value. As of early 2026, it still hasn’t recovered.
Some of ARK’s long-horizon calls on genomics and robotics have played out. But it’s context you need when you’re evaluating a new high-conviction bet on a company trading at 28 times unaudited forward revenue. Past drawdowns don’t predict future ones. They do tell you what kind of ride you’re signing up for.
ARK’s approach is explicitly long-term, high-risk, high-conviction. That’s the stated strategy. The question is whether it matches your time horizon, your actual risk tolerance, and your financial situation right now.
ARKK currently holds about $5.74 billion in assets under management and charges a 0.75% annual expense ratio. On a $10,000 investment, that’s $75 per year in fees — regardless of how the fund performs. If you’re thinking about where this fits in your broader cash picture, it’s worth reviewing what you have sitting in high-yield savings accounts before moving money into a volatile fund.
Hidden Structural Risks: NAV, Liquidity, and the SEC
This section doesn’t make the excitement cycle. It should.
The valuation problem. OpenAI shares don’t trade on a public exchange. No ticker, no bid-ask spread, no daily price discovery. When ARK reports the value of its OpenAI position — and by extension your ARKK share price — that value comes from internal models, not a market transaction. If ARK decides OpenAI is worth more, the NAV goes up. If they decide it’s worth less, it goes down. The methodology is disclosed in fund documents, but the process is nothing like how Tesla’s value in the same fund gets calculated. Two very different kinds of math, one share price.
The liquidity problem. You can sell ARKK whenever you want — the ETF itself trades freely. But if there’s a wave of redemptions and ARK needs to raise cash, selling private shares is much harder and slower than selling Tesla or Shopify. The fund will likely have to sell its liquid holdings first, which changes the remaining portfolio’s composition in ways that don’t benefit the holders who stay.
The SEC is watching. The SEC’s 2026 Examination Priorities explicitly call out ETFs holding illiquid private assets as an area of elevated scrutiny. Regulators are specifically focused on valuation practices and conflicts of interest in funds that mix public and private holdings. It means this exact structure is on their list.
Amazon committed $50 billion total to OpenAI’s latest round, but $35 billion of that is conditional — the full amount only releases if OpenAI completes an IPO or hits an artificial general intelligence milestone by the end of 2028. Even the largest investors in this round are pricing in real uncertainty on timing.
The Questions Worth Asking Before You Invest in OpenAI Through ARK
Nobody — not ARK, not any analyst, not this article — knows whether OpenAI will be worth $852 billion, more, or less in five years. Anyone who tells you otherwise is guessing with confidence, and those two things don’t belong in the same sentence.
What you can do is ask yourself a few honest questions before deciding anything.
Are you buying ARKK for OpenAI, or for ARKK? If OpenAI is the draw, run the 3% math on whatever you’re thinking of investing. Is that the exposure you actually want?
Can you stomach the volatility? A fund that lost more than half its value from its peak — and held that loss for years — is not a fund for money you might need. This is money that could sit for a decade and still might not be back where it started. Before you commit, make sure you have a solid emergency fund in place — speculative positions and thin cash reserves are a painful combination.
Are you comfortable with private-company valuation risk? Your ARKK share price will reflect whatever methodology ARK uses to value OpenAI’s private shares. That’s a different kind of risk than owning stock in a public company.
What’s your thesis, and how would you know if it were wrong? “AI is going to be huge” describes a sentiment, not a thesis. A thesis says something like: “OpenAI will maintain pricing power as the model market commoditizes.” What would change your mind, and would you act on it?
There’s genuine historical significance in what just happened. For the first time, retail investors who want to invest in OpenAI stock can get at least some exposure through a publicly available vehicle, before an IPO that may or may not come. That’s worth understanding clearly.
The excitement is real. The FOMO is real. What’s also real is that your dollar doesn’t care about either of those things — it just needs a clear-headed decision before it moves.
