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Upcoming IPOs
Watch this space — we're integrating live IPO calendar data. In the meantime, the NASDAQ IPO Calendar is the cleanest public source for U.S. listings.
IPO Center
From private to publicly investable
Initial Public Offerings
An IPO — Initial Public Offering — is the process by which a private company sells shares to the public for the first time. It's the moment a company crosses the line from "not investable" to "investable" for retail investors. Substox tracks the IPO pipeline so you can see what's coming, what just listed, and the largest IPOs ever.
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Recent High-Profile IPOs
The most-watched recent debuts include AI infrastructure plays, fintech listings, and biotech offerings. Substox is building dedicated post-IPO pages for the names that retail investors are most interested in tracking.
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Largest IPOs in History
Saudi Aramco (2019, $25.6B raised), Alibaba (2014, $25B), SoftBank (2018, $23.5B), Visa (2008, $17.9B), Facebook (2012, $16B). Mega-IPOs are the moments when entire industries get repriced — and the days retail investors learn the hard lesson that "first day pop" is often "first month dip."
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Why IPOs Matter to Retail Investors
IPOs are how new companies enter the universe of investable stocks. For most retail investors, the realistic move isn't to "get allocated" at the IPO price (that's largely reserved for institutions and high-net-worth clients) — it's to decide whether to buy after the stock starts trading, often at a premium. Reading the S-1 filing, understanding the lockup expiration, and watching the first few earnings reports usually matters more than catching the listing day itself.
Questions people ask
Common Questions
What is an IPO?
An initial public offering: the moment a private company first sells shares to the public and becomes investable. Before it, only employees and private investors can hold equity.
Can I buy at the IPO price?
Usually not. Shares at the offer price mostly go to institutions and to brokerage clients in allocation programmes. Most people buy once trading opens, which can be at a very different price.
Are newly listed companies riskier?
Often, yes. They have a short public track record, early lock-up expiries can add selling pressure, and prices can be volatile in the first months. Substox is an educational resource, not a licensed financial adviser, and nothing here is investment advice.