Supermicro grew fiscal 2026 net sales 77.8% to $39.1bn and doubled net income to $2.23bn, but burned $6.8bn of operating cash as inventory and receivables ballooned, gross margin slipped again to 10.8%, and its largest customer reached 28.1% of sales.
Revenue
$39.1B
+77.8% YoY
Net income
$2.2B
+112.7% YoY
Diluted EPS
$3.26
+94.0% YoY
Operating margin
7.1%
Revenue up 78%, profit up 113% — and $6.8 billion of cash out the door
Super Micro Computer ("Supermicro") builds the physical servers that run artificial-intelligence workloads — racks of machines packed with Nvidia GPUs, increasingly cooled by liquid rather than fans. Its fiscal year does not follow the calendar: fiscal 2026 ran from July 1, 2025 to June 30, 2026, and the annual report covering it (Form 10-K) was filed on August 31, 2026.
On the income statement, fiscal 2026 was the best year in the company's history. Net sales reached $39.06 billion, up 77.8%, and net income more than doubled to $2.23 billion. But the cash flow statement tells a different story: the business consumed$6.81 billion of cash from operations, versus generating $1.66 billion the year before. Supermicro covered the gap by borrowing and by selling stock — $9.48 billion of net financing inflows. Understanding why those two statements point in opposite directions is the whole story of this filing.
Headline figures
Metric
FY2026 (ended 6/30/26)
FY2025 (ended 6/30/25)
YoY change
Net sales
$39,063.1M
$21,972.0M
+77.8%
Gross profit
$4,227.3M
$2,429.9M
+74.0%
Gross margin
10.8%
11.1%
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"pp" means percentage points. Gross margin is the share of each sales dollar left after paying for the parts and manufacturing; operating margin is what's left after that plus salaries, R&D and overhead, but before interest and tax.
The margin problem hasn't gone away — it's just been outrun
Supermicro is, in accounting terms, a thin-margin assembler of other companies' expensive silicon. Gross margin fell again in fiscal 2026, to 10.8% from 11.1%, and is now 3.0 percentage points below fiscal 2024's 13.8%. Management's own explanation is unusually blunt: the decline came "primarily due to our strategy to offer competitive pricing to gain market share, change in product and customer mix, and higher manufacturing related expenses." That is a company saying it is buying volume with price.
The cost detail shows where the pressure came from beyond pricing:
Tariffs cost an extra $237.7 million, a 228.3% increase, "driven by new trade policies enacted during the year."
Vendor rebates shrank, adding $312.9 million (+24.9%) to cost of sales. Rebates are discounts suppliers pay back after the fact; less of them means a higher effective component cost.
Partly offsetting: inventory write-downs fell $43.8 million (−18.8%), because the company managed to sell aged stock it had previously marked down.
So the 0.3-point margin decline understates the underlying squeeze — it absorbed roughly $550 million of tariff and rebate headwinds while also cutting price to win share.
What rescued the profit line was operating leverage: revenue grew 77.8% while operating expenses grew only 23.8%. Operating costs fell from 5.4% of sales to 3.7%. R&D alone dropped from 2.9% of sales to 2.0% — not because Supermicro spent less (R&D rose 21.1% to $771.2 million) but because the revenue base nearly doubled underneath it. That is the entire source of the operating-margin improvement: a shrinking cost ratio, not a better product margin.
Why EPS grew half as fast as profit
Net income rose 112.7% but diluted earnings per share rose only 94.0%, to $3.26. The gap is dilution. Diluted share count rose 11.0%, from 628.4 million to 697.3 million, reflecting convertible notes and the equity raised during the year. Investors own a materially larger number of claims on those record profits than they did a year ago.
Two other items below the operating line are worth naming:
Net interest flipped from a small positive to a small negative. Interest expense tripled to $194.6 million (from $59.6 million) as the company drew on revolving credit facilities in the second half of the year and carried newly issued convertible notes. Interest income also tripled, to $186.9 million, on the large cash pile — so the two roughly cancel, but the borrowing cost is now real and growing.
The tax rate jumped from 12.9% to 19.9%, costing about $195 million of net income versus last year's rate. Management attributes this to a smaller tax deduction from stock-based compensation and a lower federal R&D credit, "both driven by the decrease in our stock price." A falling share price mechanically raises Supermicro's tax bill — an unusual linkage worth remembering for fiscal 2027 modelling.
The cash flow is the real headline
Cash flow item
FY2026
FY2025
Operating activities
−$6,809.9M
+$1,659.5M
Investing activities
−$200.3M
−$183.2M
Financing activities
+$9,478.8M
+$2,024.0M
Despite $2.23 billion of net income and $412.1 million of non-cash stock compensation added back, operations burned $6.81 billion. The cause is a working-capital build of extraordinary scale:
Balance sheet item
6/30/2026
6/30/2025
Change
Inventories
$12,895.9M
$4,680.4M
+175.5%
Accounts receivable, net
$6,125.4M
$2,203.9M
+177.9%
Cash and equivalents
$7,521.5M
$5,169.9M
+45.5%
Total assets
$29,945.5M
$14,018.4M
+113.6%
Inventory and receivables together grew by $12.1 billion — more than five times the year's net income. Both grew faster than the 77.8% sales increase. On our own calculation from the figures above, inventory on hand went from roughly 87 days of cost of sales to about 135 days, and receivables from roughly 37 days of sales to about 57 days. Supermicro is holding far more GPU-laden stock, and waiting materially longer to be paid for it, per dollar of revenue than it was a year ago.
Management's framing is that this supports "future revenue growth," and for a company shipping GB200 and GB300 rack systems with long component lead times, pre-positioning inventory is a genuine operational necessity — the filing notes manufacturing lead times that "in some cases, extended beyond twelve months." But inventory of this vintage carries obsolescence risk in a market where Nvidia refreshes silicon annually; the company already took $188.1 million of inventory write-downs in fiscal 2026.
The funding came from two places: $3.95 billion net from credit lines and term loans, and $5.64 billion from equity offerings completed in the fiscal fourth quarter. Supermicro ended the year with $4.06 billion drawn under credit facilities (at rates of 1.3%–5.7%) plus $4.73 billion of convertible notes — roughly $8.8 billion of debt against $7.5 billion of cash. It also reports $34.2 billion of non-cancellable purchase commitments as a current obligation, which is where the next year's inventory bill is already locked in.
Concentration got worse in the way that matters
The filing describes fiscal 2026 growth as driven partly by "customer diversification." The concentration disclosure points the other way on the measure that counts:
FY2026: one customer was 28.1% of total net sales. No other customer reached 10%.
FY2025: four customers were 20.9%, 11.5%, 11.3% and 11.1% — 54.8% combined.
FY2024: one customer was 20.0%.
The number of 10%-plus customers fell from four to one, so total disclosed concentration dropped. But the single largest relationship grew from 20.9% to 28.1% of the company — more than a quarter of revenue now sits with one buyer. Receivables are similarly concentrated: at June 30, 2026, three customers accounted for 23.0%, 17.1% and 12.5% of the accounts receivable balance, 52.6% between them. Given that receivables nearly tripled and now run at ~57 days, the credit exposure to a small number of names is a good deal larger in dollar terms than a year ago.
The geographic split reinforces the point that this was a concentrated, US-hyperscaler-driven year rather than a broad one:
Region
FY2026
FY2025
YoY change
United States
$27,690.1M
$13,052.6M
+112.1%
Asia
$6,063.3M
$5,494.1M
+10.4%
Europe
$2,674.5M
$2,727.0M
−1.9%
Other
$2,635.2M
$698.3M
+277.4%
The US contributed $14.6 billion of the $17.1 billion total revenue increase — 86% of all growth — and rose from 59.4% to 70.9% of sales. Europe shrank. Asia grew at a tenth of the corporate rate. Note also that Thailand was 10.9% of fiscal 2025 revenue and no longer appears as a 10%-plus country in fiscal 2026, consistent with last year's four-large-customer pattern rolling off.
Within the product mix, "Hyper Servers, GPU & Super Racks" grew $15,261.5 million, or 83.4%, tied specifically to GB200 and GB300 systems. Services and software — the higher-margin, recurring part — grew from $330.5 million to $538.3 million, but at 1.4% of revenue it is too small to change the margin arithmetic.
Takeaway: Supermicro doubled its profit while burning $6.8 billion of cash, and funded the gap with $9.5 billion of new debt and equity. The record income statement is real, but it was produced by winning price-competitive AI-server share — gross margin fell for a second straight year, to 10.8% — and financed by a $12.1 billion build in inventory and receivables concentrated in one customer that is now 28.1% of sales. The question for fiscal 2027 is not whether revenue grows; it is whether that working capital converts back into cash before the hardware in it becomes a generation old.
Governance: better, but not fixed
This matters more than usual for Supermicro, which failed to file its fiscal 2024 annual report on time, lost its auditor, and only became current on its SEC filings in February 2025. The fiscal 2026 10-K was filed on schedule, roughly two months after year-end, and BDO USA, P.C. audited all three presented fiscal years and issued an attestation report on internal controls. That is a meaningful improvement in basic reporting reliability.
However, management concluded that internal control over financial reporting was not effective as of June 30, 2026, and that disclosure controls were also not effective. Three of the four previously reported material weaknesses — segregation of duties, completeness and accuracy of information produced, and timely recording and disclosure — were remediated during fiscal 2026. One remains: IT general controls, specifically that controls over user access to financial applications and system infrastructure "did not operate for a sufficient period of time" and were not performed consistently. A "material weakness" means there is a reasonable possibility a material error would not be caught. Management expects to complete testing during fiscal 2027; BDO nonetheless signed the financial statements, and management states they fairly present results in all material respects.
Separately, the company continues to face an SEC subpoena, a grand jury subpoena from the US Attorney's Office for the Southern District of New York, and inquiries from the DOJ and the Commerce Department's Office of Export Enforcement, all connected to an indictment of three former associates over alleged diversion of export-restricted products. An independent investigation led by the Lead Independent Director and Audit Committee Chair (with Munger, Tolles & Olson and AlixPartners) found no evidence that any current senior manager knew of the alleged scheme and no basis to conclude prior financial statements were unreliable. The government investigations are not bound by that conclusion and remain open. General and administrative expense still carried a $31.7 million (98.4%) increase in legal and internal-investigation costs, though audit and tax fees fell $12.0 million as the fiscal 2024 filing-delay costs dropped out.
What to watch in fiscal 2027
The 10-K gives no revenue or margin guidance. What management does commit to:
Capital expenditure of $380–400 million in fiscal 2027, more than double the $162.0 million spent in fiscal 2026, for global manufacturing, tooling and facilities.
Operating expenses expected to keep rising across R&D, sales and marketing, and G&A, driven by headcount and stock compensation.
A Malaysian tax incentive the effective rate already assumes. Supermicro's tax rate reflects an expected exemption for its Malaysian subsidiary that it has applied for but not yet been granted, conditional on hitting a minimum investment threshold by December 16, 2026. If it is not granted, the effective rate and cash taxes rise.
Our read: the earnings power here is genuine but structurally fragile. At a 10.8% gross margin, Supermicro keeps under 11 cents of each sales dollar before overhead, so profit depends on volume holding and on operating costs staying near 3.7% of sales — both of which depend heavily on one customer continuing to buy at current scale. The three things that would change the picture, in order of importance: whether operating cash flow turns positive as the inventory built in fiscal 2026 ships and is collected; whether gross margin stabilises above 10% or continues its two-year slide; and whether the remaining IT-controls material weakness is cleared in fiscal 2027 without a new one appearing. The balance sheet can absorb another year like this one — $7.5 billion of cash and fresh equity give real room — but not indefinitely, and the $34.2 billion of purchase commitments means the cash demands of fiscal 2027 are already largely committed.