Onto Innovation (ONTO) Q1 2026 earnings review
The V-Shaped Recovery is Complete; A Massive Bet on Rigaku
Onto Innovation has successfully navigated its 2025 product gap. A year ago, management admitted to losing 2.5D packaging share, triggering a revenue trough in Q3 2025. Today, the new Dragonfly G5 is qualified at leading logic and HBM customers, driving a record $292M in Q1 revenue. Q2 guidance points to a massive acceleration toward $325M, proving the turnaround is real. However, a stunning $710M investment in Rigaku—exceeding Onto's current cash balance—radically alters the capital allocation story and introduces new funding risks.
🐂 Bull Case
The successful qualification of the Dragonfly G5 system at top-tier 2.5D logic and HBM customers proves Onto has closed the competitive gap that plagued it in early 2025.
Management guided Q2 revenue to $325M at the midpoint, representing ~28% YoY growth and signaling that AI-driven capacity expansions are translating directly into tool orders.
🐻 Bear Case
Operating cash flow plummeted to $26M in Q1 from $95M in Q4 2025. While likely a working capital build for the Q2 revenue surge, it requires close monitoring.
Onto committed $710M for a 27% stake in Rigaku. With only $654M in cash on the balance sheet, the company will likely need to tap debt markets or issue equity before the H2 2026 close.
⚖️ Verdict: 🟢
Bullish. The core operational story is flawless: they identified a product gap, built a better tool, won the qualifications, and are now guiding for explosive growth. The Rigaku investment adds balance sheet risk, but the underlying business momentum is undeniable.
Key Themes
Dragonfly G5 Drives Packaging Redemption
In early 2025, Onto lost critical 2.5D packaging share because its older tools couldn't meet evolving sensitivity requirements. The accelerated Dragonfly G5 program was their answer. In Q1 2026, this system officially qualified at a leading 2.5D logic customer and an HBM customer. This is the primary catalyst driving the aggressive $325M revenue guide for Q2, marking a complete reversal of last year's market share losses.
Atlas G6 Accelerates Advanced Nodes
The Advanced Nodes segment grew 13% sequentially in Q1, driven by a second leading logic customer selecting the newly launched Atlas G6 for Gate-All-Around (GAA) metrology. Management expects this segment to grow approximately 25% for the full year. GAA's complex 3D architectures require significantly higher metrology intensity, acting as a structural tailwind for Onto.
The $710M Rigaku Bet
Onto is acquiring a 27% stake in Rigaku for $710M to integrate advanced X-ray technologies into its portfolio. While strategically sound for expanding process control capabilities, the financial mechanics are aggressive. This single transaction exceeds Onto's entire current cash and short-term investments balance ($654M).
Operating Cash Flow Collapse
Despite record revenue, operating cash flow dropped precipitously to $26M in Q1 2026, compared to $95M in Q4 2025 and $83.4M in Q3 2025. Given the strong Q2 revenue guidance, this is likely tied to a massive inventory and receivables build, but cash conversion efficiency has temporarily broken down.
GAAP vs. Non-GAAP Divergence Widens
The gap between reported and adjusted earnings is massive. Q1 GAAP operating margin was just 11.5% ($33.5M), while Non-GAAP was 26.7% ($77.9M). The $44.3M difference is driven by $19.7M in intangible amortization, $10.1M in restructuring, and $6.1M in M&A expenses. As Onto continues to acquire (Semilab, Rigaku), investors must acknowledge that these 'one-time' adjusted costs are becoming a permanent feature of the P&L.
Other KPIs
Accelerating. Up from 54.6% in 25Q4 and significantly recovered from the 25Q3 trough of 54.0%. This indicates that pricing power on new tools (Dragonfly G5, Atlas G6) and the ongoing transition of manufacturing to extended Asian factories are successfully offsetting prior tariff headwinds.
Relatively stable sequentially (up from $639.6M in Q4 2025). However, this liquidity profile is about to be severely tested by the pending $710 million Rigaku investment. Capital allocation optionality (like the buybacks seen in early 2025) is likely paused.
Guidance
Accelerating. The midpoint of $325M implies an 11% sequential increase from Q1's record, and a massive 28% YoY increase from 25Q2 ($253.6M). This confirms volume ramps for new products and strong underlying AI infrastructure demand.
Accelerating. Midpoint of 28.3% shows excellent operating leverage against the Q1 result of 26.7%, proving that the revenue surge is dropping cleanly to the bottom line.
Accelerating. Midpoint of $1.69 implies 35% YoY growth compared to $1.25 in 25Q2. This marks a full recovery from the 2025 earnings trough.
Key Questions
Rigaku Funding Mechanics
With the $710M Rigaku stake exceeding your current cash balance of $654M, what is the specific funding plan? How much debt do you plan to take on, and will this limit future M&A or buyback capabilities?
Cash Flow Conversion
Operating cash flow dropped to $26M in Q1 despite record net income. How much of this was tied to working capital builds for the Q2 revenue ramp, and what is the normalized cash conversion expectation for FY26?
Restructuring and M&A Costs
You recorded over $16M in restructuring and M&A expenses this quarter, drastically depressing GAAP margins. When do you expect these 'temporary' integration and restructuring costs to roll off the P&L?
Dragonfly G5 Capacity
With the Dragonfly G5 now qualified and Q2 revenue guided to $325M, are supply chain constraints (particularly in precision optics mentioned last quarter) fully resolved to meet H2 2026 demand?