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Side-by-side financial comparison of ONTO INNOVATION INC. (ONTO) and CarParts.com, Inc. (PRTS). Click either name above to swap in a different company.

ONTO INNOVATION INC. is the larger business by last-quarter revenue ($218.2M vs $120.4M, roughly 1.8× CarParts.com, Inc.). ONTO INNOVATION INC. runs the higher net margin — 12.9% vs -9.6%, a 22.5% gap on every dollar of revenue. On growth, CarParts.com, Inc. posted the faster year-over-year revenue change (-9.8% vs -13.5%). Over the past eight quarters, ONTO INNOVATION INC.'s revenue compounded faster (2.6% CAGR vs -8.6%).

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.

Genuine Parts Company (GPC) is an American automotive and industrial parts distributor based in Atlanta, Georgia. Established by brothers Carlyle and Malcolm Fraser in 1928, the company has approximately 60,000 employees. In addition to the United States, GPC has operated in Australasia, Belgium, Canada, France, Germany, Mexico, the Netherlands, Poland, and the United Kingdom. GPC's subsidiaries include industrial parts distributor Motion as well as NAPA Auto Parts, which primarily sells part...

ONTO vs PRTS — Head-to-Head

Bigger by revenue
ONTO
ONTO
1.8× larger
ONTO
$218.2M
$120.4M
PRTS
Growing faster (revenue YoY)
PRTS
PRTS
+3.7% gap
PRTS
-9.8%
-13.5%
ONTO
Higher net margin
ONTO
ONTO
22.5% more per $
ONTO
12.9%
-9.6%
PRTS
Faster 2-yr revenue CAGR
ONTO
ONTO
Annualised
ONTO
2.6%
-8.6%
PRTS

Income Statement — Q3 FY2025 vs Q4 FY2025

Metric
ONTO
ONTO
PRTS
PRTS
Revenue
$218.2M
$120.4M
Net Profit
$28.2M
$-11.6M
Gross Margin
50.7%
33.2%
Operating Margin
10.9%
Net Margin
12.9%
-9.6%
Revenue YoY
-13.5%
-9.8%
Net Profit YoY
-46.8%
25.0%
EPS (diluted)
$0.57
$-0.82

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
PRTS
PRTS
Q4 25
$120.4M
Q3 25
$218.2M
$127.8M
Q2 25
$253.6M
$151.9M
Q1 25
$266.6M
$147.4M
Q4 24
$263.9M
$133.5M
Q3 24
$252.2M
$144.8M
Q2 24
$242.3M
$144.3M
Q1 24
$228.8M
Net Profit
ONTO
ONTO
PRTS
PRTS
Q4 25
$-11.6M
Q3 25
$28.2M
$-10.9M
Q2 25
$33.9M
$-12.7M
Q1 25
$64.1M
$-15.3M
Q4 24
$48.8M
$-15.4M
Q3 24
$53.1M
$-10.0M
Q2 24
$52.9M
$-8.7M
Q1 24
$46.9M
Gross Margin
ONTO
ONTO
PRTS
PRTS
Q4 25
33.2%
Q3 25
50.7%
33.1%
Q2 25
48.2%
32.8%
Q1 25
53.7%
32.1%
Q4 24
50.2%
32.5%
Q3 24
54.1%
35.2%
Q2 24
52.9%
33.5%
Q1 24
51.7%
Operating Margin
ONTO
ONTO
PRTS
PRTS
Q4 25
Q3 25
10.9%
-7.9%
Q2 25
12.7%
-8.2%
Q1 25
23.7%
-10.3%
Q4 24
16.1%
-11.6%
Q3 24
21.0%
-6.9%
Q2 24
20.2%
-6.0%
Q1 24
18.7%
Net Margin
ONTO
ONTO
PRTS
PRTS
Q4 25
-9.6%
Q3 25
12.9%
-8.5%
Q2 25
13.4%
-8.4%
Q1 25
24.0%
-10.4%
Q4 24
18.5%
-11.5%
Q3 24
21.0%
-6.9%
Q2 24
21.9%
-6.0%
Q1 24
20.5%
EPS (diluted)
ONTO
ONTO
PRTS
PRTS
Q4 25
$-0.82
Q3 25
$0.57
$-0.19
Q2 25
$0.69
$-0.23
Q1 25
$1.30
$-0.27
Q4 24
$0.98
$-0.28
Q3 24
$1.07
$-0.17
Q2 24
$1.07
$-0.15
Q1 24
$0.94

Balance Sheet & Financial Strength

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

Metric
ONTO
ONTO
PRTS
PRTS
Cash + ST InvestmentsLiquidity on hand
$603.1M
$25.8M
Total DebtLower is stronger
Stockholders' EquityBook value
$2.0B
$53.5M
Total Assets
$2.2B
$184.9M
Debt / EquityLower = less leverage

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
ONTO
ONTO
PRTS
PRTS
Q4 25
$25.8M
Q3 25
$603.1M
Q2 25
$217.5M
Q1 25
$203.7M
Q4 24
$212.9M
Q3 24
$188.7M
Q2 24
$172.6M
Q1 24
$190.9M
Stockholders' Equity
ONTO
ONTO
PRTS
PRTS
Q4 25
$53.5M
Q3 25
$2.0B
$64.2M
Q2 25
$2.0B
$62.4M
Q1 25
$1.9B
$72.8M
Q4 24
$1.9B
$85.2M
Q3 24
$1.9B
$97.2M
Q2 24
$1.8B
$103.9M
Q1 24
$1.8B
Total Assets
ONTO
ONTO
PRTS
PRTS
Q4 25
$184.9M
Q3 25
$2.2B
$200.3M
Q2 25
$2.1B
$189.6M
Q1 25
$2.1B
$216.5M
Q4 24
$2.1B
$210.6M
Q3 24
$2.1B
$227.6M
Q2 24
$2.0B
$238.0M
Q1 24
$2.0B

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
PRTS
PRTS
Operating Cash FlowLast quarter
$83.4M
Free Cash FlowOCF − Capex
$82.0M
FCF MarginFCF / Revenue
37.6%
Capex IntensityCapex / Revenue
0.6%
Cash ConversionOCF / Net Profit
2.95×
TTM Free Cash FlowTrailing 4 quarters
$261.3M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
ONTO
ONTO
PRTS
PRTS
Q4 25
Q3 25
$83.4M
$-6.4M
Q2 25
$57.9M
$-25.6M
Q1 25
$92.0M
$5.5M
Q4 24
$56.0M
$1.8M
Q3 24
$67.2M
$8.5M
Q2 24
$65.3M
$-3.6M
Q1 24
$57.1M
Free Cash Flow
ONTO
ONTO
PRTS
PRTS
Q4 25
Q3 25
$82.0M
$-8.3M
Q2 25
$44.2M
$-27.9M
Q1 25
$83.7M
$3.4M
Q4 24
$51.4M
$-631.0K
Q3 24
$59.2M
$4.9M
Q2 24
$53.0M
$-10.8M
Q1 24
$50.2M
FCF Margin
ONTO
ONTO
PRTS
PRTS
Q4 25
Q3 25
37.6%
-6.5%
Q2 25
17.4%
-18.3%
Q1 25
31.4%
2.3%
Q4 24
19.5%
-0.5%
Q3 24
23.5%
3.4%
Q2 24
21.9%
-7.5%
Q1 24
21.9%
Capex Intensity
ONTO
ONTO
PRTS
PRTS
Q4 25
Q3 25
0.6%
1.5%
Q2 25
5.4%
1.5%
Q1 25
3.1%
1.4%
Q4 24
1.8%
1.8%
Q3 24
3.2%
2.5%
Q2 24
5.1%
4.9%
Q1 24
3.0%
Cash Conversion
ONTO
ONTO
PRTS
PRTS
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%

PRTS
PRTS

Segment breakdown not available.

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