Microsoft MSFT
OpenAI's largest backer and primary cloud partner via Azure, holding roughly a 27% stake and reselling OpenAI models through Copilot. The closest large-cap public proxy for OpenAI.
Buy MSFT →How to invest in OpenAI
OpenAI is still private, so there's no ticker to buy. There are several real ways to get exposure today. Here's each route, who it's for, and where to start.
Your options, step by step
- 1
Understand: you can't buy it directly yet
OpenAI is private. There's no ticker and no public shares. Anyone claiming to sell you 'OpenAI stock' on a normal brokerage today is mistaken, or worse.
- 2
Option A: Public proxies (anyone)
Buy shares of OpenAI's largest backers, Microsoft (MSFT) and Nvidia (NVDA), through any standard broker. This is the only route open to non-accredited investors today.
- 3
Option B: Secondary markets (accredited)
Accredited investors can sometimes access pre-IPO OpenAI shares via secondary marketplaces and SPVs. Availability, minimums, and fees vary.
- 4
Option C: Wait for the IPO
When the public S-1 and pricing arrive, shares will list on a public exchange. A first-earnings entry gives one quarter of audited data before you commit.
Buy public proxy stocks
The closest tradeable exposure to OpenAI today is through its strategic backers, MSFT and NVDA. Use any broker below, then see live charts on our financials page.
Robinhood
PartnerCommission-free trading for proxy stocks like MSFT and NVDA, and a likely day-one venue if/when OpenAI lists.
- $0 commissions
- Fractional shares
- IPO Access program
Interactive Brokers
PartnerLow-cost global broker favored by serious investors; broad access to US equities and ETFs.
- Low margin rates
- Global markets
- Pro tools
Other ways to invest in the AI boom now
OpenAI's backers are the closest proxies, but the AI wave runs much wider. While OpenAI stays private, these public stocks let you put money behind the same trend today: the chipmakers powering every model, rival-linked names, and recent AI-era IPOs like SpaceX. Each trades on any broker above.
Direct OpenAI backers & partners
Public companies that invested in OpenAI or supply its compute. The closest listed exposure to OpenAI itself.
NVIDIA NVDA
Made a $30B equity investment in OpenAI and supplies the GPUs that train and serve its models. Direct exposure to OpenAI's compute build-out.
Buy NVDA → Amazon AMZN
Struck a $50B strategic partnership with OpenAI plus a $38B, seven-year agreement to run workloads on AWS Trainium compute.
Buy AMZN → Oracle ORCL
Stargate operations and hosting partner with a multi-year cloud commitment reported around $300B; co-owns the flagship Abilene data center.
Buy ORCL →Recent AI-era IPOs
Newly public companies riding the same AI wave OpenAI will list into. A read on how the market prices frontier-AI growth.
SpaceX SPCX
SpaceX fully owns xAI, the maker of the Grok models, after acquiring it in early 2026, which makes it one of the most direct public-market routes into a frontier lab alongside its space business. It recently completed a record-setting IPO.
Buy SPCX →Rival-linked names
Public stocks tied to OpenAI's main rival, Anthropic. Useful for tracking the competitive side of the AI race.
Alphabet (Google) GOOGL
Backer of OpenAI rival Anthropic and a direct competitor through Gemini. A way to track the other side of the frontier-model race.
Buy GOOGL →AI chips & infrastructure
The picks-and-shovels layer. Every frontier lab, OpenAI included, runs on these chips and data-center suppliers.
Broadcom AVGO
Custom AI silicon and networking supplier for hyperscale data centers, including the build-out OpenAI's compute partners depend on.
Buy AVGO → AMD AMD
The main alternative AI accelerator supplier as labs diversify away from a single chip vendor.
Buy AMD → TSMC TSM
Fabricates the advanced chips behind the AI boom, including Nvidia GPUs and custom accelerators.
Buy TSM →Pre-IPO secondary marketplaces
If you're an accredited investor, these platforms sometimes list OpenAI shares through private secondary transactions or SPVs. Availability is not guaranteed and minimums can be high.
Forge Global
PartnerSecondary marketplace for pre-IPO shares. OpenAI stock occasionally trades here via private transactions and SPVs.
- Pre-IPO private shares
- Accredited investors
- SPV access
Accredited investors only.
Visit Forge Global →EquityZen
PartnerBuy into pre-IPO companies through managed funds and direct secondary transactions.
- Pre-IPO funds
- Lower minimums than direct
- Accredited only
Accredited investors only.
Visit EquityZen →Hiive
PartnerLive order-book marketplace for private-company shares with transparent bid/ask pricing.
- Live pricing
- Direct secondary
- Accredited only
Accredited investors only.
Visit Hiive →Some links above are partner/affiliate links, and we may earn a commission at no cost to you. This never affects our analysis. See our affiliate disclosure.