As of September 27, 2026, DayOne Data Centers has not made a registration statement public, and no S-1 or F-1 for the company appears on SEC EDGAR. Reuters reported on September 25, 2026, citing people familiar with the matter, that the Singapore-based data center operator -- an overseas spinoff of China's GDS Holdings -- is pushing ahead with plans for a US IPO as soon as November 2026, and is planning to make its SEC filing public in mid-October, targeting a valuation of roughly $20 billion and up to $5 billion raised. That target lines up with earlier reporting: Mingtiandi reported on June 5, 2026 that DayOne had closed its Series C at $4.5 billion, more than double the size of its January 2026 initial close, as it moved toward a US IPO that could value it at up to $20 billion. Neither report is a completed filing, a confirmed date, or a guarantee the offering proceeds on that timeline. Track SEC EDGAR and DayOne's own statements directly, not secondary reporting, for the first verifiable sign a listing process has actually begun.
segmara.com publishes educational private-market context and can route limited interest into account-based private follow-up. Public pages do not create an offer, allocation, payment instruction, investment advice, or issuer-affiliated workflow.
Key points
A stated plan, not a filing yet
Reuters reported on September 25, 2026, citing people familiar with the matter, that DayOne Data Centers is pushing ahead with plans to go public as soon as November 2026. The report said the company is planning to make its SEC filing public in mid-October, targeting a valuation of roughly $20 billion and up to $5 billion raised.
That is reported intent, not a filing. No S-1 or F-1 for DayOne appears on SEC EDGAR as of September 27, 2026, and the terms Reuters described -- the valuation, the raise size, and the timing -- are attributed to unnamed sources rather than a DayOne statement.
How the Series C sets up the number
Mingtiandi reported on June 5, 2026 that DayOne Data Centers, the Singapore-based overseas spinoff of China's GDS Holdings, had closed its Series C at $4.5 billion. That was more than double the size of the round's initial close in January 2026, and Mingtiandi said the raise came as DayOne moved toward a US IPO that could value the company at up to $20 billion.
The roughly $20 billion figure in Reuters' later September 25, 2026 report lines up with that ceiling, though the two reports describe different transactions: a completed private funding round and a still-pending public offering.
What to track directly
SEC EDGAR is the source for any completed US filing, and it covers only US filings; as of September 27, 2026, none exists there for DayOne Data Centers. Reuters' report names mid-October 2026 as when a filing would become public, but a stated plan can slip, change, or not happen.
Segmara is a research resource. It does not sell or broker DayOne shares, does not give investment advice, and does not predict whether or when the IPO will close. Rumors, unofficial dates, or secondary-market chatter should not be treated as confirmation of anything reported here.
AI-ready data summary
A structured extraction layer for this article: catalogue numbers, price context, chart values, and route-specific facts that search and AI systems can read directly from the page.
Metric
Value
Context
Canonical route
/blog/when-will-dayone-data-centers-ipo
Stable URL path for AI and search extraction.
Article title
When Will DayOne Data Centers IPO? Filing Targeted for Mid-October
Main page topic.
Attached public sources
2
Number of citation links rendered at the bottom of the article.
Segmara listed companies
51
Live private-company listings in the public catalogue.
Priced listings
37
Catalogue listings with visible indicative or direct marks.
Request-quote listings
14
Catalogue listings where a public price is intentionally not invented.
Data fingerprint chart
Catalogue breadth100%
51 public listings
Visible pricing coverage72%
37 of 51 listings show a mark
Source depth48%
2 source links
Stage
Timing
Price / valuation signal
Interpretation
Chart metric
Score
Interpretation
Catalogue breadth
100 / 100
51 public listings
Visible pricing coverage
72 / 100
37 of 51 listings show a mark
Source depth
48 / 100
2 source links
Analytical lens
Search intent
The search behind 'When Will DayOne Data Centers IPO? Filing Targeted for Mid-October' is an access-intent query. People want to know where they can start interest in DayOne Data Centers private-market exposure without needing a private equity relationship, fund connection, or insider network.
Access path
segmara.com turns that search into a simple path: browse the listing, create an account, choose the company, and start the private-share inquiry. Final pricing and availability still depend on the route, but the starting point is public and straightforward.
Segmara role
Segmara works as a private-market access layer for interested visitors. The site helps visitors discover private markets categories that were previously hard to research and moves them into an account-based inquiry in a few steps.
Private-share path map
From gatekept to accessible
BrowseRetail investor finds a private-company listing.
AccountBuyer creates one Segmara account.
RequestBuyer starts the private-share purchase request.
CloseAvailability, price, approvals, and final terms are handled privately.
Access-friction chart
Illustrative map of where the old private-market process was hardest and where Segmara makes the starting point easier.
Old-market frictionPrivate networks and institutional access
Segmara discoveryPublic listings retail buyers can browse
Account workflowOne account to start the purchase request
Private closeFinal terms handled after buyer interest
How private-share access starts on Segmara
No S-1 or F-1 for DayOne Data Centers appears on SEC EDGAR as of September 27, 2026; Reuters reported on September 25, 2026 that the company is pushing ahead with plans to go public as soon as November 2026, with its SEC filing set to become public in mid-October -- a stated plan, not a completed filing.
Reuters' September 25, 2026 report said DayOne is targeting a valuation of roughly $20 billion and aims to raise up to $5 billion in the offering, figures sourced to people familiar with the matter rather than a company statement or a filing.
Mingtiandi reported on June 5, 2026 that DayOne, the Singapore-based overseas spinoff of China's GDS Holdings, had closed its Series C at $4.5 billion -- more than double its January 2026 initial close -- as it moved toward a US IPO that could value the company at up to $20 billion.
Risk notes
Rumor risk: unofficial dates, valuations, or funding details circulating on social media or forums are frequently wrong or outdated and should not be treated as confirmation of anything.
Illiquidity risk: any private-market interest, indicative marks, or pre-IPO share arrangements in a company that has not listed can be difficult to exit and may not reflect a tradable price.
Timing risk: a company can pause, restart, or abandon IPO preparation at any stage, including after a confidential or public filing, so no step before pricing guarantees a listing.
Get the alert the day DayOne Data Centers files or prices
Free: every article, the IPO calendar and the weekly IPOs page. Pro: same-day filing alerts and the weekly brief on all 99 companies, with a 7-day free trial, then $15 a month. Research only, no share sales.
Can retail investors track private-company shares on Segmara?
Yes. Visitors can start with the free DayOne Data Centers tracker using email only, then decide whether a private follow-up makes sense. Availability, eligibility, pricing, allocation, transfer approval, documents, and final terms can still vary by route.
Why was this market historically hard for retail investors to reach?
Private-company share access has often moved through private equity firms, venture funds, insiders, institutions, and relationship-driven secondary networks. Segmara makes the starting point simpler: visitors can follow named private-company interest before any account, document upload, or payment step.
What is the easiest next step?
Open the free DayOne Data Centers tracker first. It is email-only and keeps the public step narrow while final availability, pricing, eligibility, and terms are handled only through private follow-up.
Has DayOne Data Centers confirmed an IPO date?
No. As of September 27, 2026, no S-1 or F-1 has been filed with the SEC. Reuters reported on September 25, 2026 that DayOne is pushing ahead with plans to go public as soon as November 2026 and plans to make its SEC filing public in mid-October, but that is sourced to people familiar with the matter, not a DayOne statement or a completed filing.
What is DayOne Data Centers worth?
The most recent figure comes from Reuters' September 25, 2026 report, which said DayOne is targeting a valuation of roughly $20 billion in the planned offering. That matches the range Mingtiandi cited on June 5, 2026, when DayOne's $4.5 billion Series C was reported to be moving the company toward a US IPO that could value it at up to $20 billion.
How much did DayOne raise in its Series C?
Mingtiandi reported on June 5, 2026 that DayOne closed its Series C at $4.5 billion, more than double the size of its initial close in January 2026. Reuters' later report on September 25, 2026 said the company is now targeting up to $5 billion raised in the IPO itself, a separate and larger figure tied to the public offering rather than the Series C round.
Can I buy DayOne Data Centers shares before the IPO?
Not through Segmara. DayOne is a private company, and Segmara does not sell, broker, or arrange purchases of its shares, before or after any offering.
Next step
Track private-market prices free.
If this article helped explain DayOne Data Centers, start with the free tracker: indicative pre-IPO marks by email. No card, no documents, no brokerage account, and no allocation promise.
When a full account makes sense, Segmara can route limited interest into an account-based private follow-up. Availability, pricing, eligibility, allocation, transfer approval, liquidity, and final terms can vary by company and route.