The cloud landlord now is a tenant: Microsoft has signed for $43.8bn of Nscale capacity
Nscale's S-1 carries agreements worth up to $43.8bn with Microsoft, which spent $145bn on its own data centers last year and still says it is capacity-constrained. The listing's other anchor is Anthropic, chief rival to Microsoft-backed OpenAI.
Vincent Jiang · 3 min read
The quiet line in the filing belongs to Microsoft
Nscale, a neocloud spun off from a cryptocurrency mining operation in early 2024, filed its S-1 on 18 September 2026 for a New York Stock Exchange listing under the symbol NSCL 15. The coverage read it for Nvidia, which holds more than 5% through warrants and bought $1bn of a $3.1bn convertible note 235.
The quieter line belongs to Microsoft: agreements providing for up to $43.8bn in potential payments through 2033, tied to Nscale's facilities in Norway and Portugal 45. The tenancy predates the filing. In October 2025, Microsoft signed an expanded agreement covering around 200,000 Nvidia chips across Europe and the US, worth up to $14bn to Nscale 67; this April it added more than 30,000 chips to the rental at Narvik, Norway 1.
A $1.02bn loss on $140.6m of revenue
Nscale lost $1.02bn on $140.6m of first-half revenue 12. Press reports put the listing target between about $30bn and $35bn, against $14.6bn in a March round 247, with a raise of as much as $3bn 1.
The landlord is also a tenant
Microsoft, which has provided $11.9bn of a $13bn funding commitment to OpenAI 8, is the industry's most aggressive builder: 88 data centers online in fiscal 2026, $145.3bn of capital spending, and about $50bn guided for the September quarter 8. CFO Amy Hood still flagged "capacity constraints" and supply issues on the July earnings call 8. The record suggests a company that cannot build fast enough to serve its own demand, so it rents: CoreWeave, the listed comparable, draws 67% of its revenue from Microsoft 4.
Microsoft's quarterly capex has more than tripled in three years, and it still rents
Data
| Capex | |
|---|---|
| Q3 '23 | $9.92B |
| Q4 '23 | $9.74B |
| Q1 '24 | $10.95B |
| Q2 '24 | $13.87B |
| Q3 '24 | $14.92B |
| Q4 '24 | $15.8B |
| Q1 '25 | $16.75B |
| Q2 '25 | $17.08B |
| Q3 '25 | $19.39B |
| Q4 '25 | $29.88B |
| Q1 '26 | $30.88B |
| Q2 '26 | $35.8B |
Two names carry the pipeline
One unnamed customer supplied 52% of first-half revenue, and the prospectus names Microsoft and Anthropic as the expected majors going forward 2. Anthropic's $44.6bn agreement, signed 25 August 2026 for 460 megawatts at the Monarch campus in West Virginia, is contingent on Nscale securing financing and cancellable if it misses milestones the filing calls "stringent" 45.
Microsoft and Anthropic maxima are 85% of Nscale's $103.4bn pipeline
- Anthropic$44.6B43.1%
- Microsoft$43.8B42.4%
- Other customers$15B14.5%
Data
| Slice | Value | Share |
|---|---|---|
| Anthropic | $44.6B | 43.1% |
| Microsoft | $43.8B | 42.4% |
| Other customers | $15B | 14.5% |
Microsoft's own commitment has edges. It signed a 1.35-gigawatt letter of intent at Monarch in March 2026 and walked away over the summer, per the filing as TechTimes reports it 5.
Nscale has 25,000 GPUs running against 461,000 active or contracted, across five operational facilities 5. The biggest builder in AI is renting from a company that has switched on a fraction of what it has sold.
What the pricing amendment has to answer
Matt Kennedy of Renaissance Capital calls the $100bn-plus pipeline a main selling point 2; it stood at $103.4bn on 31 August 2026, up from $38bn at the end of 2025 9. No share count or price range is set yet 5.
Watch two things: the name behind the 52%, and Microsoft's late-October quarter, where $50bn of guided spending either closes the capacity gap or keeps the landlord paying rent to a two-year-old startup 8.
How this brief was made
01Gathered & sourced184 channels · 1,149 articles▾
Agents swept 184 channels and ingested 1,149 articles, then de-duplicated and ranked them for signal.
02Verified & cross-validated10 claims · 35 data feeds▾
Every one of 10 load-bearing claims was checked against primary sources, with 35 live data feeds reconciling the figures and charts.
- 1Bloomberg via Yahoo Finance, "Nvidia-Backed Data Center Firm Nscale Files Publicly for US IPO," 18 September 2026
- 2Reuters via KFGO, "Nvidia-backed AI cloud firm Nscale reveals revenue surge in US IPO filing," 18 September 2026
- 3StockTwits via Yahoo Finance, "Nvidia-Backed Cloud Platform Nscale Files For IPO, NVDA Stock In Focus," 18 September 2026
- 4TechCrunch, Marina Temkin, "Nscale's IPO will test Wall Street's appetite for concentrated AI bets once again," 22 September 2026
- 5TechTimes, William Chan, "Nscale Files $30B NYSE IPO With $1B Nvidia Note and $45B Anthropic Deal," 20 September 2026
- 6Reuters via Yahoo Finance, "UK's Nscale to supply Microsoft with 200,000 Nvidia AI chips," 15 October 2025
- 7CNBC, Kai Nicol-Schwarz, "Nvidia backs AI data center startup Nscale as it hits $14.6 billion valuation," 9 March 2026
- 8Datacenter Dynamics, Georgia Butler, "Microsoft brought 88 data centers online in FY2026," 30 July 2026
- 9Investing.com via Yahoo Finance, Luke Juricic, "Nscale files for IPO as pipeline passes $100 billion," 18 September 2026
- 10Sharadar quarterly fundamentals from Microsoft's SEC filings, retrieved 24 September 2026
03Reviewed & edited2 human editors▾
2 editors read the draft against the evidence, tuned the framing, and signed off before it shipped.
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