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Side-by-side financial comparison of ONTO INNOVATION INC. (ONTO) and Zai Lab Ltd (ZLAB). Click either name above to swap in a different company.

ONTO INNOVATION INC. is the larger business by last-quarter revenue ($218.2M vs $127.1M, roughly 1.7× Zai Lab Ltd). On growth, Zai Lab Ltd posted the faster year-over-year revenue change (17.1% vs -13.5%). ONTO INNOVATION INC. produced more free cash flow last quarter ($82.0M vs $-26.7M). Over the past eight quarters, Zai Lab Ltd's revenue compounded faster (20.8% CAGR vs 2.6%).

Onto Innovation Inc. is an American semiconductor company formed in 2019 from the merger of Rudolph Technologies, Inc. and Nanometrics Incorporated. It is a provider of process and process control equipment and software for microelectronic manufacturing industries.

Zai Lab Ltd is a global biopharmaceutical company focused on developing, manufacturing and commercializing innovative therapies for oncology, autoimmune disorders, infectious diseases and other unmet medical needs. It operates primarily in the Greater China region and partners with leading global biotech firms to expand access to life-saving treatments for underserved patient populations.

ONTO vs ZLAB — Head-to-Head

Bigger by revenue
ONTO
ONTO
1.7× larger
ONTO
$218.2M
$127.1M
ZLAB
Growing faster (revenue YoY)
ZLAB
ZLAB
+30.6% gap
ZLAB
17.1%
-13.5%
ONTO
More free cash flow
ONTO
ONTO
$108.7M more FCF
ONTO
$82.0M
$-26.7M
ZLAB
Faster 2-yr revenue CAGR
ZLAB
ZLAB
Annualised
ZLAB
20.8%
2.6%
ONTO

Income Statement — Q3 FY2025 vs Q4 FY2025

Metric
ONTO
ONTO
ZLAB
ZLAB
Revenue
$218.2M
$127.1M
Net Profit
$28.2M
Gross Margin
50.7%
51.0%
Operating Margin
10.9%
-54.6%
Net Margin
12.9%
Revenue YoY
-13.5%
17.1%
Net Profit YoY
-46.8%
EPS (diluted)
$0.57
$-0.05

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$127.1M
Q3 25
$218.2M
$115.4M
Q2 25
$253.6M
$109.1M
Q1 25
$266.6M
$105.7M
Q4 24
$263.9M
$108.5M
Q3 24
$252.2M
$101.8M
Q2 24
$242.3M
$100.1M
Q1 24
$228.8M
$87.1M
Net Profit
ONTO
ONTO
ZLAB
ZLAB
Q4 25
Q3 25
$28.2M
$-36.0M
Q2 25
$33.9M
$-40.7M
Q1 25
$64.1M
$-48.4M
Q4 24
$48.8M
Q3 24
$53.1M
$-41.7M
Q2 24
$52.9M
$-80.3M
Q1 24
$46.9M
$-53.5M
Gross Margin
ONTO
ONTO
ZLAB
ZLAB
Q4 25
51.0%
Q3 25
50.7%
59.5%
Q2 25
48.2%
60.6%
Q1 25
53.7%
63.6%
Q4 24
50.2%
61.5%
Q3 24
54.1%
64.1%
Q2 24
52.9%
64.9%
Q1 24
51.7%
61.4%
Operating Margin
ONTO
ONTO
ZLAB
ZLAB
Q4 25
-54.6%
Q3 25
10.9%
-42.3%
Q2 25
12.7%
-50.3%
Q1 25
23.7%
-53.3%
Q4 24
16.1%
-62.6%
Q3 24
21.0%
-66.6%
Q2 24
20.2%
-76.0%
Q1 24
18.7%
-80.7%
Net Margin
ONTO
ONTO
ZLAB
ZLAB
Q4 25
Q3 25
12.9%
-31.2%
Q2 25
13.4%
-37.3%
Q1 25
24.0%
-45.8%
Q4 24
18.5%
Q3 24
21.0%
-40.9%
Q2 24
21.9%
-80.2%
Q1 24
20.5%
-61.4%
EPS (diluted)
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$-0.05
Q3 25
$0.57
$-0.03
Q2 25
$0.69
$-0.04
Q1 25
$1.30
$-0.04
Q4 24
$0.98
$-0.09
Q3 24
$1.07
$-0.04
Q2 24
$1.07
$-0.08
Q1 24
$0.94
$-0.05

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
ONTO
ONTO
ZLAB
ZLAB
Cash + ST InvestmentsLiquidity on hand
$603.1M
$689.6M
Total DebtLower is stronger
Stockholders' EquityBook value
$2.0B
$715.5M
Total Assets
$2.2B
$1.2B
Debt / EquityLower = less leverage

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$689.6M
Q3 25
$603.1M
$717.2M
Q2 25
$217.5M
$732.2M
Q1 25
$203.7M
$757.3M
Q4 24
$212.9M
$779.7M
Q3 24
$188.7M
$616.1M
Q2 24
$172.6M
$630.0M
Q1 24
$190.9M
$650.8M
Stockholders' Equity
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$715.5M
Q3 25
$2.0B
$759.9M
Q2 25
$2.0B
$791.7M
Q1 25
$1.9B
$810.8M
Q4 24
$1.9B
$840.9M
Q3 24
$1.9B
$667.7M
Q2 24
$1.8B
$704.2M
Q1 24
$1.8B
$762.2M
Total Assets
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$1.2B
Q3 25
$2.2B
$1.2B
Q2 25
$2.1B
$1.2B
Q1 25
$2.1B
$1.2B
Q4 24
$2.1B
$1.2B
Q3 24
$2.1B
$985.3M
Q2 24
$2.0B
$987.4M
Q1 24
$2.0B
$988.4M

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
ONTO
ONTO
ZLAB
ZLAB
Operating Cash FlowLast quarter
$83.4M
$-26.0M
Free Cash FlowOCF − Capex
$82.0M
$-26.7M
FCF MarginFCF / Revenue
37.6%
-21.0%
Capex IntensityCapex / Revenue
0.6%
0.5%
Cash ConversionOCF / Net Profit
2.95×
TTM Free Cash FlowTrailing 4 quarters
$261.3M
$-158.9M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$-26.0M
Q3 25
$83.4M
$-32.0M
Q2 25
$57.9M
$-31.0M
Q1 25
$92.0M
$-61.7M
Q4 24
$56.0M
$-55.8M
Q3 24
$67.2M
$-26.8M
Q2 24
$65.3M
$-42.2M
Q1 24
$57.1M
$-90.1M
Free Cash Flow
ONTO
ONTO
ZLAB
ZLAB
Q4 25
$-26.7M
Q3 25
$82.0M
$-35.0M
Q2 25
$44.2M
$-33.9M
Q1 25
$83.7M
$-63.2M
Q4 24
$51.4M
$-58.4M
Q3 24
$59.2M
$-28.2M
Q2 24
$53.0M
$-42.9M
Q1 24
$50.2M
$-91.1M
FCF Margin
ONTO
ONTO
ZLAB
ZLAB
Q4 25
-21.0%
Q3 25
37.6%
-30.4%
Q2 25
17.4%
-31.1%
Q1 25
31.4%
-59.9%
Q4 24
19.5%
-53.8%
Q3 24
23.5%
-27.7%
Q2 24
21.9%
-42.9%
Q1 24
21.9%
-104.5%
Capex Intensity
ONTO
ONTO
ZLAB
ZLAB
Q4 25
0.5%
Q3 25
0.6%
2.6%
Q2 25
5.4%
2.6%
Q1 25
3.1%
1.5%
Q4 24
1.8%
2.4%
Q3 24
3.2%
1.3%
Q2 24
5.1%
0.7%
Q1 24
3.0%
1.1%
Cash Conversion
ONTO
ONTO
ZLAB
ZLAB
Q4 25
Q3 25
2.95×
Q2 25
1.71×
Q1 25
1.44×
Q4 24
1.15×
Q3 24
1.27×
Q2 24
1.23×
Q1 24
1.22×

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

Revenue Breakdown by Segment

ONTO
ONTO

Systems And Software Revenue$173.8M80%
Parts Revenue$23.9M11%
Service Revenue$20.5M9%

ZLAB
ZLAB

Zejula$56.0M44%
Other$21.9M17%
Nuzyra$16.0M13%
Optune$11.9M9%
XACDURO$10.7M8%
Qinlock$9.7M8%
AUGTYRO$836.0K1%

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