ACM Research (ACMR) Q3 2026 earnings review
ACM Research raises its sales plan, but inventory drains cash
ACM Research makes wafer-cleaning and metal-plating machines for chip factories, and its main cleaning line grew again while newer packaging tools kept climbing. Third-quarter revenue rose 37% and operating profit excluding one-offs jumped 81% because overhead costs grew much slower than sales. Chief executive David Wang raised the full-year sales plan by $110 million, which by our math points to 51% growth in the fourth quarter and beats what the company's own prior plan pointed to.
| Revenue | $367.7M +37% from a year ago |
|---|---|
| Profit per share, excluding one-offs | $0.55 +34% from a year ago |
| ACM Shanghai order backlog | $2.5B +88% from a year ago |
| Full-year revenue outlook | Raised $110M middle of the range: 40% growth |
⚖️ Verdict: 🟢 Bullish
The story got better because the big outlook raise and a 16% rebound in wafer-cleaning sales knocked down the two main worries from last quarter: that second-half growth would stall and that local rivals were shrinking the core cleaning business. A $2.5 billion backlog and a second factory building in Shanghai give the higher plan clear backing. The bad news: stockpiling parts and sending evaluation tools to customers drained $70 million of operating cash, while customer deposits still have not risen with orders.
The question now is whether the $263 million of finished tools sitting at customer factories will turn into paid sales without write-downs or price cuts. Bulls see those evaluation machines as next year's revenue across furnaces and cleaning; skeptics point to the 41.6% gross margin and shrinking customer deposits as signs of tougher terms in China. Fourth-quarter gross margin and operating cash flow will tell.
🐂 Bull Case
Orders and Backlog Back the Raised Outlook
ACM Research makes equipment that cleans, plates and packages silicon wafers for chipmakers, mostly in China. Three months ago, its full-year forecast pointed to a sharp slowdown in the second half. This quarter erased that worry because chief executive David Wang lifted the 2026 revenue plan by $110 million at the middle of the range, to $1.24–1.28 billion, placing it "above the upper end of our prior range".
- Order backlog at ACM Shanghai: $2.5 billion as of September 29, up 88% from a year ago
- Nine-month order growth: up 147% from a year ago, accelerating from 105% in the first half
- Fourth-quarter revenue implied by the new outlook: about $368 million by our math, up 51% from a year ago
- Manufacturing capacity: opening a second building in Lingang, China, "doubling our manufacturing floor space to support future growth" to $3 billion in yearly output
The backlog and order pace show that customer demand was never the bottleneck. Instead, the chip-tool maker had set a cautious forecast while waiting for parts and factory space. With the second Lingang building starting up in the fourth quarter, management expects fourth-quarter tool shipments to rise even further from the third quarter's $343.5 million.
What to watch: fourth-quarter shipments when full-year results arrive in early 2027. A figure above $343.5 million would confirm that the new factory building is turning the $2.5 billion backlog into deliveries without part shortages holding it back.
Wafer Cleaning Returned to Growth After Two Down Quarters
Machines that wash chemicals and particles off silicon wafers remain the company's biggest product line, bringing in 57% of total sales. Revenue in this cleaning category shrank 5.5% in the first quarter and 14.2% in the second, raising fears that cheaper Chinese rivals were taking business. In the third quarter, cleaning sales grew 16.1% from a year ago to $210.7 million, with Wang noting "our cleaning category returning to year-over-year growth".
Newer high-temperature tools are driving the rebound. ACM sells a single-wafer SPM system, which uses a hot sulfuric acid mixture to strip tough residues, a step Wang estimates at one-third of the entire cleaning market. In October, the group launched an upgraded model that recycles 70% of its sulfuric acid, saving about 400 tons of acid per machine each year, and stayed on track to ship "more than 20 single-wafer SPM tools across multiple customers" in 2026.
What to watch: whether cleaning revenue keeps growing in the fourth quarter and into 2027. One up quarter fades the market-share worry, but two or three quarters of growth as those 20 SPM tools pass customer testing are needed to prove the rebound will last.
Plating and Packaging Tools Keep Driving the Product Mix
While cleaning steadied, the newer equipment lines grew more than four times as fast. Sales of electroplating tools — which deposit copper and other metals onto wafers — along with high-temperature furnaces rose 82.9% from a year ago to $109.5 million. A third group covering advanced packaging tools, spare parts and services grew 71.2% to $47.5 million. Together, these two lines made up 42.7% of third-quarter revenue, up from 32.5% a year earlier.
In October, the equipment maker shipped its first 310-by-310-millimeter horizontal panel-level plating production tool to an Asian customer. Unlike standard tools that plate round wafers, this machine plates square panels used to package large artificial-intelligence chips, and Wang called it the "world's first shipment of its kind" as "the market is now coming to us". Outside mainland China, management expects more than 20 installed tools across about 10 customers by year-end.
What to watch: customer acceptance of furnace tools and international packaging deployments in 2027. Wang expects furnaces to make a larger revenue contribution next year as tools now in testing pass qualification.
Overhead Discipline Lifted the Operating Margin by Four Points
Even though gross margin dipped slightly, operating profit excluding one-offs jumped 81.5% from a year ago to $66.2 million, lifting the operating margin by 4.4 percentage points to 18.0%. The gain came from keeping a lid on operating expenses, which rose 12.7% while sales grew 36.6%. Total operating costs excluding stock-based pay dropped by 5.0 percentage points of revenue, to 23.6%.
Every cost line shrank as a share of sales. General and administrative overhead fell 2.9 percentage points to 4.0% of revenue, research and development dropped 1.2 points to 12.8%, and sales and marketing dipped 1.0 point to 6.7%. Finance chief Mark McKechnie trimmed his full-year cost targets to match, lowering planned research spending by one point to 15–17% of sales and sales and marketing to 7–8%.
What to watch: fourth-quarter research and development spending. To reach even the bottom of McKechnie's 15–17% full-year range after running at 13.7% through nine months, fourth-quarter engineering costs will have to step up sharply.
🐻 Bear Case
Working Capital Drained $70 Million of Operating Cash
Rapid sales growth is tying up cash on the balance sheet rather than generating it. ACM burned $70.4 million in cash from operations during the third quarter and spent another $25.2 million on factory construction, resulting in $95.6 million of negative free cash flow by our math. That follows $127.9 million of cash burn in the first half of the year.
- Total net inventory: $851.2 million at September 30, up 21.1% from December 31
- Raw materials: $465.5 million, more than half of total inventory
- Finished goods inventory: $263.1 million, consisting mostly of "first tools under evaluation at our customer sites"
- Accounts and other receivables: $815.4 million, up 47.5% from year-end
McKechnie said the team "used our balance sheet to grow our raw materials this quarter" so part shortages would not delay customer deliveries, while Wang noted he is adding second and third suppliers. Stockpiling parts protects the shipment schedule, but $263.1 million in finished machines sitting at customer fabs carry a risk: if a chipmaker rejects an evaluation tool, ACM cannot book the revenue and must write down the inventory.
What to watch: operating cash flow and finished-goods inventory in the fourth quarter. Turning evaluation tools into accepted sales and collecting on the $815.4 million receivable balance should start returning cash to the business.
Product Mix Pushed Gross Margin Below the Target Band
Gross margin excluding stock-based pay slipped 0.5 percentage points from a year ago and 4.4 points from the second quarter to 41.6%. Cost of revenue — the parts and factory labor needed to build the machines — rose to 58.4% of sales, pushing gross margin below management's 42–48% long-term target range for the first time since the fourth quarter of 2025.
McKechnie blamed the drop on product mix, currency moves and a routine inventory write-down that stayed "within a normal range". Because electroplating and packaging tools grew faster than high-margin cleaning gear over the past year, the shift in what customers bought weighed on profitability. He expects gross margin to rise slightly in the fourth quarter, and Wang maintains that patent protection will shield pricing from Chinese copycats.
What to watch: fourth-quarter gross margin excluding one-offs. A recovery back above 42% would show the third-quarter dip was temporary product mix rather than price cuts forced by local rivals.
Customer Deposits Still Lag Behind Surging Orders
Wang told investors that nine-month orders jumped 147% from a year ago and that the Shanghai subsidiary's order backlog rose 88% to $2.5 billion. Normally, when chipmakers place a wave of new tool orders, they pay upfront deposits that show up as liabilities on the equipment supplier's balance sheet.
The balance sheet tells a different story. Advances from customers stood at $163.2 million on September 30, down from $187.8 million at the end of December and slightly below June's $165.6 million. Even adding deferred revenue of $24.9 million, total customer prepayments of $188.1 million are down 8.3% since the start of the year by our math. That cuts against the order boom and suggests ACM is accepting smaller upfront payments to win orders, which helps explain the $70.4 million operating cash outflow.
What to watch: customer advances on the year-end balance sheet. If backlog is truly $2.5 billion, upfront deposits should rise unless payment terms have permanently loosened.
Risks this quarter didn't answer
Four standing concerns around geography, trade rules, share dilution and next-generation tools received no new financial resolution in the third-quarter release.
- China customer concentration: almost all revenue still comes from mainland China; the quarterly filing will show whether the top three customers stayed near 44% of sales.
- US export controls: the Shanghai and Korean subsidiaries remain on the US trade blacklist; no new supply disruptions were reported, but rule tightening remains an active threat.
- Shareholder dilution: past share sales funded the $1.28 billion cash pile to build factories and buy parts, but lifted the diluted share count 7.6% from a year ago to 73.6 million and cut the parent's stake in ACM Shanghai to 73.2%, with a proposed Hong Kong listing still pending.
- Next-generation Track and PECVD tools: rather than qualifying for production revenue by the end of 2026 as previously targeted, Wang now expects revenue contributions to progress through 2027 and into 2028.
👓 Other Themes
China Wafer Fab Spending Holds Up Across Logic and Memory
Domestic Chinese chipmakers continue to build out factory capacity for data centers, electric cars and robotics. Wang said that while global semiconductor equipment spending may reach a cyclical peak around 2028 or 2029, China's factory build-out started later and should peak one to two years after the rest of the world, giving the company a multi-year window of domestic demand.
💲 Other KPIs
Total shipments — which combine tools billed straight to revenue and first-time evaluation machines sent to customer factories — rose 30.6% from a year ago and 22.0% from the second quarter. That topped the $335–340 million preliminary range issued in late October. Management expects fourth-quarter shipments to climb again as the second Lingang factory building opens.
Cash, restricted cash and time deposits stood at $1.28 billion on September 30, down from $1.36 billion in June. Subtracting $343.1 million of short-term and long-term debt leaves $0.9 billion in net cash, down from $1.0 billion last quarter because the US-based group spent cash on raw-material inventory and factory equipment.
Reported net profit attributable to the parent company fell 95.7% from $35.9 million a year ago, or to $0.02 per share. The drop came from non-operating investment swings: ACM Shanghai recorded a $39.1 million paper loss on its stock portfolio and a $7.1 million loss from affiliate stakes, whereas last quarter it booked a $69.6 million paper gain.
🔮 Guidance
Raised. The middle of the full-year sales plan moved up $110 million to $1.26 billion, calling for 38% to 42% growth. By our math, that leaves about $368 million for the fourth quarter, or 51% growth from a year ago against last year's soft fourth quarter. It is the second raise this year and nearly five times the size of August's $22.5 million bump.
Unchanged on the long-term target. McKechnie expects fourth-quarter gross margin to step up slightly from the third quarter's 41.6% as product mix improves, while keeping the 42% to 48% long-term model intact. Through the first nine months of 2026, gross margin excluding stock-based pay has averaged 44.3%, safely inside the target band.
Cut. The finance chief lowered full-year cost targets across all three overhead lines by about one percentage point of revenue each, implying a total operating expense ratio near 27% to 30% for the year. Because non-GAAP operating expenses ran at 25.9% of sales through the first nine months, the plan still leaves room for higher engineering and sales spending in the fourth quarter.
Cut. Management trimmed the full-year tax rate view to the bottom of last quarter's 10% to 12% range. In the third quarter, tax expense fell to $1.9 million from $2.7 million a year ago because paper losses on the Shanghai subsidiary's investment portfolio lowered reported pre-tax profit.
Unchanged. The equipment maker still plans to spend about $175 million on property and factories this year, covering the second manufacturing building in Lingang and the cleanroom demo center in Oregon. Third-quarter capital spending was $25.2 million, bringing nine-month spending to roughly $112.5 million by our math and leaving about $62.5 million for the fourth quarter.
❓ Key Questions
Why are customer deposits down while orders more than doubled?
Nine-month orders rose 147% and backlog reached $2.5 billion, yet customer advances and deferred revenue have fallen 8.3% since December to $188.1 million. Did the company lower its upfront deposit requirements to win new tool orders?
When will Track and PECVD tools pass customer qualification?
Last quarter, management aimed to qualify its new lithography track and plasma-deposition (PECVD) machines with customers by the end of 2026. This quarter, revenue contributions were described as progressing through 2027 and into 2028. Have qualification milestones slipped?
How much of the electroplating and furnace line is furnace?
The combined electroplating and furnace category grew 83% to $109.5 million, and management expects furnace revenue to become more meaningful in 2027. Disclosing furnace revenue and evaluation tool counts separately would show how fast the newer line is converting.
Did top-customer concentration fall again in the third quarter?
In the second quarter, three Chinese chipmakers accounted for 43.5% of total revenue. The third-quarter release does not include the customer breakdown table from the quarterly filing; investors need to know if the cleaning rebound broadened the buyer base.
What is the timeline for the Hong Kong share listing?
In April, ACM Shanghai proposed selling new shares on the Hong Kong Stock Exchange, which would further dilute the US parent's 73.2% ownership stake. Management gave no update on the listing's status or timing on this call.