ACM Research (ACMR) Q2 2026 earnings review
Explosive Plating Growth Masks Core Cleaning Weakness
ACM Research delivered a strong Q2 with revenue up 36% YoY to $292.9M, prompting a raise in the FY26 guidance floor. The growth engine has definitively shifted: ECP (electroplating) and Advanced Packaging segments surged over 150%, riding the global AI and HBM wave. However, the legacy Cleaning segment contracted 14% YoY, contradicting management's prior claims of an imminent rebound. While gross margins ticked down, strict OpEx control drove meaningful operating margin expansion. The balance sheet remains a fortress with $1.0B in net cash.
🐂 Bull Case
ECP and Advanced Packaging are no longer emerging segments—they are primary growth drivers. With growth exceeding 150%, these segments are perfectly positioned to capitalize on global 2.5D/3D and HBM packaging demand.
Despite a drop in gross margins, GAAP operating margin expanded from 14.7% to 17.0%. Revenue grew 36% while operating expenses only grew 16.6%, showing scalable cost management.
🐻 Bear Case
The legacy single-wafer cleaning segment—historically the bedrock of the company—fell 14% YoY, signaling potential market share losses or demand destruction in mature nodes.
GAAP gross margin dropped 250 basis points YoY to 46.0%. As the product mix shifts heavily toward newer, competitive platforms, pricing power may be permanently constrained.
⚖️ Verdict: 🟢
Bullish. The speed at which ACM is successfully diversifying beyond its core cleaning roots is impressive. The multi-product strategy is working, and the balance sheet provides a massive buffer to fund global expansion.
Key Themes
Management's Cleaning Narrative Contradicted by Data
In Q1 2026, management dismissed a 6% decline in the Cleaning segment as a temporary legacy issue, citing a 50% jump in backlog as proof of an imminent rebound. Q2 data completely invalidates this narrative: Cleaning revenue fell an accelerating 14% YoY (to $133M from $155M). This break in trend suggests deeper structural issues, such as intense local Chinese competition or slowing mature node expansions, which management previously downplayed.
ECP and Advanced Packaging Reaching Critical Mass
The multi-product strategy has reached a tipping point. ECP/Furnace revenue rocketed 168% YoY to $128.5M, while Advanced Packaging grew 153% to $31.4M. For the first time, ECP is nearly equal in size to the legacy Cleaning business. This acceleration is directly tied to the macro AI theme, driving massive demand for HBM and advanced packaging solutions globally.
Panel-Level Innovation Securing Real Orders
ACM's proprietary Ultra ECP ap-p horizontal panel electroplating tool moved from evaluation to monetization. The company secured its first production order for a 510x515mm tool from an existing Chinese advanced packaging customer, alongside a new evaluation order from a leading Asian panel manufacturer. This validates their differentiated horizontal plating approach against established vertical plating competitors.
Gross Margin Pressure from Mix Shift
GAAP gross margin fell from 48.5% in 25Q2 to 46.0% in 26Q2. While still comfortably within management's long-term target range of 42-48%, the 250 bps drop reflects the reality of scaling new product lines (which initially carry lower margins) and potential pricing concessions required to win share in a highly competitive Chinese equipment market.
Unrealized Investment Gains Distort GAAP Net Income
Investors must strip out non-operating noise. GAAP Net Income was heavily inflated by a $69.6M unrealized gain on short-term investments held by the ACM Shanghai subsidiary. When removed, true operational Non-GAAP Net Income was $44.5M. While the mark-to-market gain boosts the balance sheet, it masks the true, slower 19% YoY growth of the core operating business.
Other KPIs
Accelerating. Improved from 14.7% a year ago and 15.6% in 26Q1. This highlights excellent expense control. Operating expenses increased only 16.6% against a 36.0% revenue surge, proving the business model can scale profitability even when gross margins contract.
Accelerating. Shipments grew 36.4% YoY, mirroring the 36.0% revenue growth. This tight correlation indicates healthy revenue conversion and less capital tied up in stranded evaluation inventory compared to prior quarters.
Stable and massive. Excludes short-term and long-term borrowings. This war chest de-risks the buildout of the Oregon facility and provides ample runway to aggressively fund R&D for next-generation platforms like Track and PECVD without dilution.
Guidance
Accelerating. Management raised the floor of guidance (previously $1.08 - $1.175B). The new midpoint of $1.15B implies 27.6% YoY growth versus FY25's $901.3M. This marks a sharp acceleration from the 15.2% growth delivered in FY25, heavily relying on the H2 ramp of new products and continued ECP momentum.
Key Questions
Cleaning Segment Reversal
In Q1, you pointed to a 50% increase in PO backlog to forecast a Cleaning segment rebound. Instead, revenue fell 14% YoY this quarter. What specifically broke down between the backlog and Q2 revenue recognition? Are we seeing structural demand destruction in mature nodes?
Gross Margin Floor
With ECP and Advanced Packaging now driving the vast majority of growth, how does this mix shift structurally alter the gross margin profile? Is the low end of your 42-48% target range the new normal?
Panel-Level Packaging Traction
You secured a production order for the 510x515mm Ultra ECP ap-p tool. What are the primary remaining technical hurdles to displacing vertical plating incumbents at top-tier global OSATs outside of Asia?