Inventory grew 26.1% in Ultra Clean Holdings’ latest three months. Revenue grew 4.6%. That is the oddest number in a filing that initially looks like a modest semiconductor recovery.
Sales reached $533.7 million for the three months ended March 27, up from $510.0 million a year earlier. The company said demand increased across its customer base, and pointed to an overall improvement in the semiconductor industry for its Products business. At the latest close, UCTT shares were $89.20, up 7.0% on August 3.
The income statement was not uniformly weaker. Gross profit rose 2.7% to $84.4 million, and operating income increased 7.5% to $11.4 million. But gross margin slipped to 15.8% from 16.1%, while net loss widened to $17.9 million from $10.9 million.
Management gave a fairly direct explanation for the margin pressure:
"Although product revenue increased modestly, cost of revenues increased at a higher rate, resulting in a decline in gross margin, primarily due to an unfavorable product mix and a shift in sales volumes across different geographic regions."
Ultra Clean Holdings, 10-Q, April 29, 2026
In plain English, the company sold more, but the mix of what it sold and where it sold it left less gross profit behind. The operating margin held near 2.1%, so the bigger issue in the period was below operating income, where the company recorded a larger loss.
The balance sheet makes the growth harder to read as a simple demand story. Inventory rose to $481.9 million, while accounts receivable increased 16.7% to $232.8 million. The mismatch matters because cash generation moved in the opposite direction.
Ultra Clean said operating cash flow fell by $61.5 million year over year. Its explanation centered on working capital:
"The $61.5 million decrease in net cash provided by operating activities was primarily driven by an unfavorable change in net working capital of $68.6 million and a higher net loss of $12.5 million, partially offset by a $19.6 million increase in non-cash items included in net loss."
Ultra Clean Holdings, 10-Q, April 29, 2026
Free cash flow margin fell to negative 8.0%, a 9.2-percentage-point decline from the comparable period. Cash still increased 3.0% to $323.5 million, but that balance does not erase the operating fact: more of the period’s resources were tied up in receivables and inventory while the business remained loss-making.
One customer read-through adds context without resolving the mismatch. Applied Materials, which represents 41.9% of UCTT’s revenue, reported revenue growth of 11.4% year over year on May 21. That points to a stronger backdrop for at least one major customer, while UCTT’s own filing still shows thinner gross margin and heavier working-capital absorption.
UCTT also disclosed $600.0 million of 0.00% convertible notes due 2031 during the three months, alongside repayment of $462.0 million on its term loan. Its next quarterly report will put the current inventory balance, receivables, and operating cash flow against another comparable period.
Ultra Clean’s latest filing pairs modest revenue growth with rising inventory, a wider net loss, and weaker operating cash generation.