Supermicro closed at $40.35 on 17 September, up 9.5%, on a Goldman Sachs note dated 15 September that raises the 2030 server market to $1.5 trillion and still rates the stock a Sell at $34. Run a market growing that fast through our Supermicro model and it is worth about a dollar a share, in the wrong direction. The rack capacity Supermicro put on the record in August is worth $12.15.
The note is a client document we did not obtain, so its figures here come from published recaps. Its 2030 split is 650 Group's: about $1.3 trillion of AI servers compounding at 46% a year. Goldman's Buy is Dell at $570; Dell closed at $588.40.
Supermicro filed nothing that week: its fiscal 2027 quiet period began at the close on 11 September, four days before the note, and its last filing was an insider Form 4 on 8 September.
Supermicro is second in the world on IDC's count and absent from Goldman's
In the recaps' June-quarter AI-server table, NVIDIA holds 42% and white-box builders 24%, with Dell's AI share at 17%. Supermicro is not in it at all. Goldman's conclusion, in the recap's words: the market "remains dominated by chipmakers and white-box manufacturers, leaving limited room for branded server vendors."
IDC's tracker, published 10 September, reads the other way: Supermicro second on vendor revenue for the June quarter, 6.1% share on revenue up 97.2% against a market up 52.0% to a record $166.3 billion. Both are true because they count different things. IDC counts every server at the revenue of the vendor that sold it; 650 Group books NVIDIA's own systems to NVIDIA rather than to whoever builds the rack. A share table drawn in June says who was credited with last quarter's revenue, not who may ship racks in 2030.
Supermicro says it can build more than 3,000 liquid-cooled racks a month
On the 11 August earnings call, Charles Liang put total manufacturing capacity "on track to exceed 6,000 racks per month, including more than 3,000 direct liquid cooling racks per month." Both come from the call rather than the release, in a third-party transcript of it.
Set them against the quarter. OEM appliance and large data centre revenue was $5.5 billion in June. At $2.75 million a rack — our assumption, an NVL-class liquid-cooled rack, and the number doing the most work below — $5.5 billion ÷ $2.75 million = 2,000 rack-equivalents, about 670 a month. Liang's floor of 3,000 a month × 3 = 9,000 a quarter, and 9,000 × $2.75 million = $24.75 billion a quarter from one customer type, against a whole-company fiscal 2027 guide of $65-72 billion. The balance of the 6,000 is air-cooled and sells for far less, so it does not belong at this price.
So the ceiling does not bind in fiscal 2027. It binds at the far end of a twenty-quarter model, where most of the value sits.
The case against reading capacity as the constraint is Supermicro's own June quarter: revenue landed at $11.1 billion, near the low end of guidance, and Liang blamed customer readiness — "power shortage, cooling, and networking" at the customer's site, not his lines. The order book answers it, at more than $60 billion of new orders in the quarter and a record backlog.
A faster market is worth a dollar to our fair value; the ceiling is worth twelve
Our base case is $60.79 a share on inputs as of 20 August, and its large-data-centre vertical grows those 2,000 rack-equivalents 21% a quarter into a ceiling of 6,000 a quarter — drawn at 2,000 liquid-cooled racks a month, the older figure, not the one August gave.
The note's 39% is a compound annual rate. As a quarterly rate it is 8.6%, and the model already runs units at 21%, so matching the market the note describes means slowing Supermicro down: fair value goes to $59.71. Push growth the other way, to 39% a quarter, and the gain is 42 cents. Raise the ceiling to 9,000 a quarter, changing nothing else, and fair value is $72.94.
Every driver in the table above beats demand growth, which is what capacity-bound means: orders are not the binding constraint, racks are. It is a different list from the one we published on 20 August, which swept the discount rate, the exit multiple and the share count and never touched units.
The October print settles it. Large-data-centre revenue holding the 21% path says racks are the constraint; another quarter where enterprise and channel carries the growth, as it did in June at 50% of revenue, says the AI line is capped outside the factory.
The 15 September Goldman Sachs note is a client document and was not obtained; its market sizes, growth rates, shares, ratings and price targets come from published recaps, and the 2030 figures carried inside it are 650 Group's estimates. The shares, growth rates and record revenue in the IDC section are IDC's Worldwide Quarterly Server Tracker of 10 September. Supermicro's June-quarter revenue, the fiscal 2027 guide, the new orders and the record backlog are from the company's 11 August release, filed as an 8-K Item 2.02 exhibit; the manufacturing capacity, the customer-type split, the customer-readiness wording and the quiet-period date are from the same day's call, read in a third-party transcript rather than a company one. Closes of $40.35 and $588.40 are 17 September snapshots, not what the ticker pages will show you; the absence of a filing that week is from Supermicro's own filing index. The rack price, the fair values and every row of the table are R40 model output on our assumptions rather than price targets, and that price is what the rest rests on.
