Register D | Generated 2026-04-26 | Sources: company IR, SEC filings, earnings transcripts, analyst data
Register D | Generated 2026-04-26 | Sources: company IR, SEC filings, earnings transcripts, analyst data
Full legal name: Onto Innovation Inc. Ticker / Exchange: ONTO / NYSE Sector / Industry (GICS): Information Technology / Semiconductor Equipment Headquarters: Wilmington, Massachusetts, USA Founded: 2019 (merger of Rudolph Technologies + Nanometrics; Rudolph traces to 1940) IPO date: Legacy entities were public; ONTO formed October 25, 2019 Website: ontoinnovation.com Investor Relations: investors.ontoinnovation.com Latest investor presentation: 2024 Annual Report + 2025 Proxy (filed Aug 2025)
Onto Innovation designs, manufactures, and supports process control equipment used by semiconductor manufacturers to detect defects, measure film thickness, and verify dimensional accuracy at every stage of chip fabrication and advanced packaging. The company’s systems sit inline on the production floor: wafers or packaged substrates go in, the tool measures something that cannot be measured any other way (optical, x-ray, or acoustic), and a yield control signal goes back to the fab. Without these tools, manufacturers cannot maintain the tight tolerances required by advanced nodes and AI packaging architectures.
The business matters because it is the eyes of the fab. Every TSMC or Samsung wafer at 3nm, every HBM stack, every chiplet bump array needs process control feedback. The equipment is not optional; it is a bottleneck gate in the production flow.
Onto operates as a single reportable segment, though it tracks revenue by three end-market categories:
| Business Line | Description | Est. Revenue Mix (FY2025) |
|---|---|---|
| Advanced Packaging | Macro-inspection, bump metrology, wafer-level packaging process control; Dragonfly family | ~35-40% |
| Advanced Nodes | OCD (Optical Critical Dimension) metrology and film metrology for leading-edge logic and memory; Atlas family | ~35-40% |
| Specialty Devices & Other | Compound semiconductors, power devices, older nodes; plus service/spare parts | ~20-30% |
Note: Onto does not break out segment revenue with full precision. The 48% cited for “Specialty Devices + Advanced Packaging” in Q1 2025 is a combined figure. Service/support is embedded within all three.
Onto generates revenue primarily from capital equipment sales (system sales), followed by aftermarket services (spare parts, service contracts, upgrades). Revenue is lumpy and order-driven; a single large wafer fab tool can be $1M-$3M+. There is no SaaS or recurring subscription line, though the installed base drives a growing service tail.
| Region | % of Revenue |
|---|---|
| Taiwan | 31.2% |
| South Korea | 28.9% |
| China | 11.8% |
| United States | 10.5% |
| Southeast Asia | 6.6% |
| Japan | 5.8% |
| Europe | 5.2% |
Key observation: Taiwan + Korea = ~60% of revenue, reflecting the dominance of TSMC and Samsung/SK Hynix in the customer base. China exposure has been deliberately managed down; management noted China was less than 3% of FY2025 revenue, a significant reduction from the FY2024 figure above.
Onto is asset-light relative to the semiconductor equipment peers. It outsources much of the mechanical assembly and relies on a small number of primary R&D and manufacturing sites:
| Location | Function | Notes |
|---|---|---|
| Wilmington, MA (HQ) | Corporate HQ, engineering, R&D | Primary US operations center |
| Milpitas, CA | Engineering, thin-film metrology R&D | Legacy Nanometrics site |
| Boise, ID | Manufacturing and engineering | Legacy Rudolph/August Technology site |
| Lehi, UT | Engineering and manufacturing | |
| Semilab USA (acquired Nov 2025) | FAaST / CnCV / MBIR product lines | Absorbed Nov 17, 2025 |
| Taiwan | Customer support, field service | Largest revenue geography |
| South Korea | Customer support, field service | Samsung/SK Hynix proximity |
| Japan | Customer support, field service | TEL/Toshiba/Kioxia proximity |
| Singapore, Malaysia, Vietnam | Field service | Southeast Asia packaging ecosystem |
| China | Field service, limited after export control tightening | Sharply reduced presence |
| Europe | Field service | Bosch, Infineon, STMicro support |
Total employees: ~1,593 (as of late 2025, pre-Semilab integration). The Semilab acquisition added incremental headcount.
Asset-light dynamic: No fabs or capital-intensive foundry. Capex runs at $20-32M/year (3-4% of revenue), well below semiconductor equipment manufacturing norms. FCF conversion is high.
JVs: None disclosed.
Key strategic partnerships: - Rigaku Holdings (268A.TSE): Co-development collaboration flagged in April 2026 on hybrid x-ray/optical metrology for 3D DRAM applications. Not yet formally disclosed by Onto; flagged in sell-side channel checks. Watch for ONTO Q1 2026 earnings call disclosure. See [[268A]] in vault for Rigaku profile. - Process integration partnerships: Onto works closely with customers (TSMC, Samsung, Intel) on equipment co-development and characterization programs, though these are generally not disclosed as formal JV structures.
Onto does not disclose specific customer names in its SEC filings. The 10-K reports customer concentration by revenue tier but names none. From earnings calls, investor presentations, and industry knowledge, the likely major customers are:
| # | Customer | Ticker | Est. Revenue Share | Relationship Type |
|---|---|---|---|---|
| 1 | TSMC | TSM (NYSE) | ~25-30% est. | OEM end-user; advanced nodes + packaging |
| 2 | SK Hynix | 000660 (KRX) | ~15-20% est. | HBM inspection; $240M+ volume agreement through 2027 |
| 3 | Samsung Electronics | 005930 (KRX) | ~10-15% est. | Advanced nodes, packaging, foundry |
| 4 | Intel | INTC (NASDAQ) | ~5-10% est. | EMIB/advanced packaging metrology |
| 5 | Micron Technology | MU (NASDAQ) | ~5% est. | DRAM/NAND memory inspection |
Note: Revenue share estimates are derived from geographic mix, public commentary, and industry channel checks. Onto does not publish customer concentration data beyond noting it serves “over 240 customers in 24+ countries.”
Concentration risk: No single customer is definitively disclosed as >20%, but Taiwan (31% of revenue) likely corresponds substantially to TSMC. The $240M+ volume agreement with an HBM customer (widely interpreted as SK Hynix) through 2027 anchors near-term revenue visibility. China has been deliberately reduced to <3% of revenue, eliminating a key concentration/sanction risk.
Dependency flags: Intel is a key strategic customer for the Intel supply chain thesis specifically (EMIB, Foveros). Intel’s restructuring and capital spending trajectory directly impacts ONTO’s order flow from that account.
Semiconductor manufacturing has no tolerance for defects at advanced nodes. A 3nm logic die has feature sizes measured in atoms; a tiny variation in film thickness or a missed particle causes yield loss worth millions per wafer. The only way to control this is with inline metrology and inspection: measure it, detect deviations, feed back to the process tool, correct. Onto’s systems perform this function across optical critical dimension (OCD) metrology, film thickness, defect macro-inspection, and bump/overlay metrology for advanced packaging.
In advanced packaging specifically (the Intel EMIB/CoWoS/HBM story), the precision required to bond chips face-to-face (hybrid bonding) or stack HBM memory dies demands micron-level overlay accuracy across entire wafer surfaces. Onto’s tools provide the measurement layer that makes this possible. Without process control, yield on these complex packages collapses.
| Market | Estimate | Source |
|---|---|---|
| Process control (metrology + inspection) TAM | ~$7-8B (2025 est.) | Company IR; Yole Group |
| Projected “AI Era” TAM | $12.3B | Onto Innovation IR |
| Prior “Mobility Era” TAM | $4.2B | Onto Innovation IR |
| Global semiconductor metrology/inspection market | $11.01B (2025) | Industry report |
| CAGR | ~5.2% (2025-2030); accelerating for advanced packaging | Various |
Onto’s SAM is concentrated in: optical metrology, macro-inspection, and advanced packaging process control. Its serviceable market is a subset of the full TAM because KLA dominates the high-end patterned defect inspection segment.
Market share: Onto is the #3 player in process control equipment globally after KLA and Applied Materials, with single-digit share in some sub-segments (non-metal thin film OCD) but strong share in advanced packaging inspection (Dragonfly) and packaging lithography (niche position). Exact share numbers are not publicly disclosed.
| Name | Title | Tenure in Role | Background |
|---|---|---|---|
| Michael P. Plisinski | President & CEO | 2015 (Rudolph CEO), ONTO since Oct 2019 | Former COO of Rudolph Technologies; started in semiconductor equipment at Counterpoint Solutions (founder, acquired by August Technology 2003); >25 years in semicap; B.S. Computer Science UMass; Harvard AMP |
| Brian K. Roberts | CFO | Appointed June 16, 2025 | 20 years as CFO including 11 years public company; most recently CFO of Sensata Technologies (NYSE: ST), ~$4B revenue global sensor/semiconductor firm; replaced Mark Sefcik who departed |
| Shirley Chen | SVP, Customer Success | Appointed June 16, 2025 | 25 years semiconductor experience; 18 years progressive sales leadership at KLA (NYSE: KLAC) and Thermo-Fisher; replaced prior sales leadership |
| Yoon Ah Oh | SVP & General Counsel | Multiple years | Senior legal/governance role; consistent with company since at least 2024 |
Note: The CFO and SVP Customer Success were both new appointments in June 2025, indicating a significant refreshing of the commercial and financial leadership layer below the CEO.
IR governance page was inaccessible (403 error); data below assembled from proxy filings and public disclosures:
| Name | Role | Independent? | Background | Committees |
|---|---|---|---|---|
| Steven R. Roth | Chair | Yes | Veteran semiconductor industry executive | Comp, Nom/Gov |
| Michael P. Plisinski | CEO / Director | No | See executive table above | None (management) |
| Additional directors | To be verified from DEF 14A | Yes (majority) | Standard independent board | Various |
Full board composition requires the proxy filing (DEF 14A). ONTO maintains a standard governance structure: one share, one vote; no dual-class shares; no poison pill disclosed. Staggered board status unclear without proxy.
| Competitor | Ticker | Primary Overlap | Moat |
|---|---|---|---|
| KLA Corporation | KLAC (NASDAQ) | Wafer inspection, OCD metrology, advanced packaging | Dominant; ~50%+ overall process control share; brand, installed base, analytics software |
| Applied Materials | AMAT (NASDAQ) | OCD metrology (Centura, VeritySEM), process integration | Process bundling advantage; breadth of fab tool portfolio |
| Nova Measuring Instruments | NVMI (NASDAQ) | Optical and x-ray metrology, thin-film | Secondary OCD position; strong XPS/optical combo |
| Camtek | CAMT (NASDAQ) | Advanced packaging inspection; 2D/3D bump | APAC-focused; competing directly on Dragonfly’s turf |
| Rigaku Holdings | 268A (TSE) | X-ray metrology; potential hybrid with optical | Co-development signal with ONTO; niche but expanding |
Competitive dynamics: KLA is ~4-5x Onto’s size and has entrench itself as the default process control supplier at leading-edge fabs. Onto competes on advanced packaging specialization (Dragonfly), where KLA has historically been weaker. The key competition is: Onto’s packaging focus vs. KLA’s breadth. Camtek is a credible threat in APAC packaging inspection at lower price points.
| Force | Assessment |
|---|---|
| Rivalry | High. KLA dominates; AMAT and Nova compete on OCD; Camtek on packaging. Price and performance competition is intense at fab tool evaluations. |
| Buyer power | High. TSMC, Samsung, SK Hynix are powerful repeat buyers who run competitive bake-offs and extract pricing pressure through volume. |
| Supplier power | Low-moderate. Onto sources optics, electronics, and precision mechanics from diversified suppliers; no critical single-source dependency identified. |
| Threat of new entrants | Low. High R&D barriers, long customer qualification cycles (18-36 months), and established installed bases deter new entry. |
| Threat of substitutes | Low. Process control is not optional; no substitute technology performs the same function. Risk is that existing players (KLA) expand coverage rather than substitutes emerging. |
Valuation (as of Apr 24, 2026)
| Metric | Value |
|---|---|
| Stock price | $307.86 |
| Market cap | ~$15.3B |
| Enterprise value | ~$14.7B (est.; net cash ~$640M reduces EV vs. mkt cap) |
| P/E (TTM) | 110.7x |
| Forward P/E (FY2026E) | ~46x (based on consensus EPS est. $6.65) |
| EV/EBITDA | N/A (not directly available; est. ~35-40x on FY2025 basis) |
| FCF yield | ~2.0% (FY2025 FCF $300M / mkt cap $15.3B) |
| Dividend yield | None |
| 52-week range | $85.88 – $316.00 |
Note: The stock has risen ~+135% over the past year (from the 52-week low area), which explains the elevated TTM P/E. The forward P/E of ~46x reflects the step-up in earnings expected in FY2026 on revenue growth + Semilab contribution.
Income Statement
| Metric | FY2022 | FY2023 | FY2024 | FY2025 | FY2026E |
|---|---|---|---|---|---|
| Revenue | $1,005M | $816M | $987M | $1,005M | $1,270M |
| Revenue growth (YoY) | +27% | -19% | +21% | +1.8% | +26% |
| Gross profit | $539M | $420M | $515M | $500M | ~$690M est. |
| Gross margin % | 53.6% | 51.5% | 52.2% | 49.7% | ~54% est. |
| EBIT | $237M | $116M | $187M | $133M | ~$290M est. |
| EBIT margin % | 23.6% | 14.2% | 18.9% | 13.2% | ~23% est. |
| Net income | $223M | $121M | $202M | $137M | ~$325M est. |
| Net margin % | 22.2% | 14.8% | 20.4% | 13.6% | ~26% est. |
| EPS (diluted) | $4.49 | $2.46 | $4.06 | $2.78 | $6.65E |
Note: FY2025 GAAP margins are compressed by acquisition-related charges from the Semilab deal (purchase accounting amortization, integration costs). Non-GAAP gross margin for FY2025 was approximately 54-55%. FY2026E from consensus analyst estimates (8 analysts, as of April 2026).
Cash Flow and Balance Sheet
| Metric | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|
| Operating cash flow | $137M | $172M | $246M | $328M |
| Capex | ($18M) | ($23M) | ($32M) | ($29M) |
| Free cash flow | $118M | $149M | $214M | $300M |
| FCF margin % | 11.8% | 18.3% | 21.7% | 29.8% |
| Cash and equivalents | $176M | $234M | $213M | $346M |
| Net cash (no debt) | $548M | $698M | $852M | $640M |
| Net debt / EBITDA | N/A (net cash) | N/A | N/A | N/A |
| ROIC | ~20%+ est. | ~12% est. | ~18% est. | ~14% est. |
Key balance sheet observation: Net cash declined from $852M (FY2024) to $640M (FY2025) primarily due to the $495M Semilab acquisition. Onto used its cash pile to fund this deal entirely without debt. The company carries no long-term debt.
Semilab International materials analysis business (closed Nov 17, 2025): Onto paid approximately $495M (later revised slightly; EIR business excluded from final scope). Acquired three product families: - FAaST: Inline wafer contamination monitoring - CnCV: Materials characterization - MBIR: Surface charge metrology
These extend Onto into electrical characterization, a domain where KLA and Nova have historically had advantages. Expected FY2026 revenue contribution: $100-120M.
Inspectrology (prior acquisition): Added overlay metrology capability.
| Risk | Likelihood | Existing Mitigants | Mgmt De-risk Plan | Can It Be Closed? |
|---|---|---|---|---|
| Semiconductor capex cyclicality | High (structural) | Diversified across logic/memory/packaging; service revenue base (~20-25% of revenue) is more stable | Geographic and customer diversification; product portfolio breadth across multiple sub-segments | No — structural cyclicality. Can only be managed via diversification and backlog visibility |
| KLA share gains / competitive displacement | Medium | Dragonfly packaging specialization; Atlas OCD differentiation; Semilab materials expansion; multi-year customer relationships | New product introductions (Atlas G6, Dragonfly G5); Semilab acquisition adds materials moat; hybrid x-ray/optical co-dev with Rigaku | Partially — ONTO can defend with product differentiation, but cannot match KLA’s breadth. Risk managed, not closed |
| Customer concentration (Taiwan/Korea ~60%) | Medium | Spreading across advanced packaging OSATs, power semi, US IDMs | Intel/US-based customer development; specialty devices expansion; Semilab opens compound semi end-markets | Partially — geographic diversification in progress but structural given semicap geography |
| Semilab integration execution | Medium (near-term) | Acquisition structured as product line purchase (not full company merger), reducing cultural integration complexity | Product synergy roadmap announced; integration adds incremental revenue in FY2026 H2 (weighted) | Closable — FY2026/2027 execution will validate or invalidate. Risk diminishes post-integration |
| Export controls / China revenue | Low (mitigated) | China deliberately reduced to <3% of FY2025 revenue; minimal exposure remaining | Continuing to de-emphasize China; no reliance on China for growth thesis | Largely closed — China is no longer a material revenue driver |
Low. Share count has been essentially flat at ~49M diluted shares for five consecutive years (2020-2025). The company has not relied on equity issuance. There is no disclosed ATM program or shelf registration. The Semilab acquisition was cash-funded (no equity issuance).
Outstanding warrants/convertibles: None disclosed.
FCF self-sufficiency: At $300M FCF in FY2025 and no debt, the company can fund operations, capex, and future M&A from cash generation. No capital raise expected.
Mike Plisinski has been in the CEO role since 2015 (Rudolph) and has led ONTO since its founding. He is the architect of the merger and the current strategic direction.
Last earnings: Q4 2025 and FY2025 results reported February 19, 2026.
Key Q4 2025 takeaways: - Revenue $266.9M; FY2025 revenue $1,005M (just crossed $1B) - Non-GAAP gross margin 54.6%, operating margin 25.2% in Q4 - Backlog nearly doubled in three months prior to earnings; two quarters of forward visibility - Advanced packaging revenue expected to grow >30% in FY2026 - SK Hynix volume agreement: $240M+ through 2027, including $60M for 3D bump metrology - China <3% of FY2025 revenue (down sharply from prior years)
Next earnings: Q1 2026 results expected approximately May 2026 (no confirmed date at time of writing).
Material news (last 90 days): - April 2026: Stifel upgrades ONTO to Buy, raises PT to $350 (from $220); Jefferies raises PT to $325 (from $300). Stock re-rated higher on AI packaging thesis. - April 2026: Dragonfly G5 Inspection System launched — new inspection/metrology platform with best-in-class throughput and 150nm defect sensitivity. - November 2025: Semilab acquisition closed ($495M); FAaST, CnCV, MBIR product lines added. - April 2025: Atlas G6 OCD Metrology Platform launched for advanced AI device process control. - June 2025: New CFO (Brian Roberts) and SVP Customer Success (Shirley Chen) appointed.
| Holder | Type | Who They Are | Shares | % Outstanding | Source |
|---|---|---|---|---|---|
| Vanguard Group Inc | Passive index | World’s largest passive asset manager; ONTO held as index constituent | 5,576,305 | ~11.3% | 13F |
| William Blair Inv. Mgmt | Active growth | Chicago-based active equity manager; growth/quality focus; significant ONTO thesis holder | 1,726,587 | ~3.5% | 13F |
| Geode Capital Management | Passive/quant | Fidelity’s passive indexing arm; pure index exposure | 1,127,532 | ~2.3% | 13F (45% increase) |
| Wellington Management | Active | Boston institutional active manager; multi-strategy | 1,218,548 | ~2.5% | 13F |
| Paradigm Capital Mgmt | Active small/mid-cap | NY-based active equity manager specializing in small/mid tech; thesis-driven | 1,125,838 | ~2.3% | 13F |
| Fisher Asset Management | Active | Ken Fisher’s global equity manager; growth-oriented | 701,999 | ~1.4% | 13F |
| T. Rowe Price | Active | Large active asset manager; growth equity | 680,266 | ~1.4% | 13F |
| AQR Capital Management | Quant/systematic | Quant hedge fund; recent 315% increase suggests model-driven factor buy signal | 615,651 | ~1.2% | 13F |
| D.E. Shaw | Quant | Major quant hedge fund; reduced position 48% recently | 517,189 | ~1.0% | 13F |
| Millennium Management | Multi-strategy HF | Major multi-strat hedge fund; tactical position | 495,000 | ~1.0% | 13F |
Total institutional ownership: ~93-95% of outstanding shares.
Insider ownership: ~0.86% (management + board combined). Low but typical for a post-merger mid-large cap. No disclosed activist positions (13D filers).
Short interest (Dec 2025): ~9.0% of float; 2.88 days to cover. Below peer group average of 9.01%. Modest; not a red flag.
| Metric | Value |
|---|---|
| Total analysts covering | 8 |
| Strong Buy | 5 |
| Buy | 3 |
| Hold | 0 |
| Sell | 0 |
| Average price target | $290-$317 (range by source) |
| High target | $350 (Stifel, Apr 2026) |
| Low target | $160 |
| FY2026E revenue consensus | $1.27B (+26% YoY) |
| FY2026E EPS consensus | $6.65 (+139% YoY from GAAP FY2025) |
Coverage is not thin (8 analysts); consensus is meaningful. Strong unanimous bullish bias reflects AI packaging tailwind consensus. The stock trading at $307 vs. average target ~$290-317 means the market is roughly at or slightly above analyst consensus.
For this specific research thread: Onto’s role in the Intel EMIB supply chain is process control for advanced packaging. Specifically:
Intel’s advanced packaging capex trajectory (projected ~$4B investment, leading among foundries) is a direct forward revenue signal for Onto.
Sources: Onto Innovation IR, Q4 2025 earnings call transcript, FY2024 10-K (SEC EDGAR), stockanalysis.com, fintel.io, Benzinga, Stifel/Jefferies analyst notes, SemiAnalysis, Onto Innovation product pages.