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

Protagonist Therapeutics, Inc is the larger business by last-quarter revenue ($170.6M vs $120.4M, roughly 1.4× CarParts.com, Inc.). Protagonist Therapeutics, Inc runs the higher net margin — 77.2% vs -9.6%, a 86.8% gap on every dollar of revenue. On growth, Protagonist Therapeutics, Inc posted the faster year-over-year revenue change (184.4% vs -9.8%).

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...

Protagonist Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on discovering and developing novel peptide-based targeted therapies for unmet medical needs, primarily covering gastrointestinal disorders, inflammatory diseases and rare disease indications. Its lead product candidates target inflammatory bowel disease and other chronic immune-related conditions, with operations spanning global R&D and partnership collaborations.

PRTS vs PTGX — Head-to-Head

Bigger by revenue
PTGX
PTGX
1.4× larger
PTGX
$170.6M
$120.4M
PRTS
Growing faster (revenue YoY)
PTGX
PTGX
+194.2% gap
PTGX
184.4%
-9.8%
PRTS
Higher net margin
PTGX
PTGX
86.8% more per $
PTGX
77.2%
-9.6%
PRTS

Income Statement — Q4 FY2025 vs Q4 FY2024

Metric
PRTS
PRTS
PTGX
PTGX
Revenue
$120.4M
$170.6M
Net Profit
$-11.6M
$131.7M
Gross Margin
33.2%
Operating Margin
74.3%
Net Margin
-9.6%
77.2%
Revenue YoY
-9.8%
184.4%
Net Profit YoY
25.0%
381.7%
EPS (diluted)
$-0.82
$2.01

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
PRTS
PRTS
PTGX
PTGX
Q4 25
$120.4M
Q3 25
$127.8M
Q2 25
$151.9M
Q1 25
$147.4M
Q4 24
$133.5M
$170.6M
Q3 24
$144.8M
Q2 24
$144.3M
Q1 24
$255.0M
Net Profit
PRTS
PRTS
PTGX
PTGX
Q4 25
$-11.6M
Q3 25
$-10.9M
Q2 25
$-12.7M
Q1 25
$-15.3M
Q4 24
$-15.4M
$131.7M
Q3 24
$-10.0M
Q2 24
$-8.7M
Q1 24
$207.3M
Gross Margin
PRTS
PRTS
PTGX
PTGX
Q4 25
33.2%
Q3 25
33.1%
Q2 25
32.8%
Q1 25
32.1%
Q4 24
32.5%
Q3 24
35.2%
Q2 24
33.5%
Q1 24
Operating Margin
PRTS
PRTS
PTGX
PTGX
Q4 25
Q3 25
-7.9%
Q2 25
-8.2%
Q1 25
-10.3%
Q4 24
-11.6%
74.3%
Q3 24
-6.9%
Q2 24
-6.0%
Q1 24
80.9%
Net Margin
PRTS
PRTS
PTGX
PTGX
Q4 25
-9.6%
Q3 25
-8.5%
Q2 25
-8.4%
Q1 25
-10.4%
Q4 24
-11.5%
77.2%
Q3 24
-6.9%
Q2 24
-6.0%
Q1 24
81.3%
EPS (diluted)
PRTS
PRTS
PTGX
PTGX
Q4 25
$-0.82
Q3 25
$-0.19
Q2 25
$-0.23
Q1 25
$-0.27
Q4 24
$-0.28
$2.01
Q3 24
$-0.17
Q2 24
$-0.15
Q1 24
$3.26

Balance Sheet & Financial Strength

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

Metric
PRTS
PRTS
PTGX
PTGX
Cash + ST InvestmentsLiquidity on hand
$25.8M
$418.9M
Total DebtLower is stronger
Stockholders' EquityBook value
$53.5M
$675.3M
Total Assets
$184.9M
$744.7M
Debt / EquityLower = less leverage

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
PRTS
PRTS
PTGX
PTGX
Q4 25
$25.8M
Q3 25
Q2 25
Q1 25
Q4 24
$418.9M
Q3 24
Q2 24
Q1 24
$322.6M
Stockholders' Equity
PRTS
PRTS
PTGX
PTGX
Q4 25
$53.5M
Q3 25
$64.2M
Q2 25
$62.4M
Q1 25
$72.8M
Q4 24
$85.2M
$675.3M
Q3 24
$97.2M
Q2 24
$103.9M
Q1 24
$560.4M
Total Assets
PRTS
PRTS
PTGX
PTGX
Q4 25
$184.9M
Q3 25
$200.3M
Q2 25
$189.6M
Q1 25
$216.5M
Q4 24
$210.6M
$744.7M
Q3 24
$227.6M
Q2 24
$238.0M
Q1 24
$629.3M

Cash Flow & Capital Efficiency

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

Metric
PRTS
PRTS
PTGX
PTGX
Operating Cash FlowLast quarter
$184.2M
Free Cash FlowOCF − Capex
$182.8M
FCF MarginFCF / Revenue
107.1%
Capex IntensityCapex / Revenue
0.8%
Cash ConversionOCF / Net Profit
1.40×
TTM Free Cash FlowTrailing 4 quarters
$101.7M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
PRTS
PRTS
PTGX
PTGX
Q4 25
Q3 25
$-6.4M
Q2 25
$-25.6M
Q1 25
$5.5M
Q4 24
$1.8M
$184.2M
Q3 24
$8.5M
Q2 24
$-3.6M
Q1 24
$-27.4M
Free Cash Flow
PRTS
PRTS
PTGX
PTGX
Q4 25
Q3 25
$-8.3M
Q2 25
$-27.9M
Q1 25
$3.4M
Q4 24
$-631.0K
$182.8M
Q3 24
$4.9M
Q2 24
$-10.8M
Q1 24
$-27.7M
FCF Margin
PRTS
PRTS
PTGX
PTGX
Q4 25
Q3 25
-6.5%
Q2 25
-18.3%
Q1 25
2.3%
Q4 24
-0.5%
107.1%
Q3 24
3.4%
Q2 24
-7.5%
Q1 24
-10.9%
Capex Intensity
PRTS
PRTS
PTGX
PTGX
Q4 25
Q3 25
1.5%
Q2 25
1.5%
Q1 25
1.4%
Q4 24
1.8%
0.8%
Q3 24
2.5%
Q2 24
4.9%
Q1 24
0.1%
Cash Conversion
PRTS
PRTS
PTGX
PTGX
Q4 25
Q3 25
Q2 25
Q1 25
Q4 24
1.40×
Q3 24
Q2 24
Q1 24
-0.13×

Financial Flow Comparison

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

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