WallStSmart

Castle Biosciences Inc (CSTL)vsEli Lilly and Company (LLY)

VS

Smart Verdict

WallStSmart Research — data-driven comparison

Eli Lilly and Company generates 21155% more annual revenue ($72.25B vs $339.92M). LLY leads profitability with a 35.0% profit margin vs -3.8%. LLY earns a higher WallStSmart Score of 76/100 (B+).

CSTL

Avoid

31

out of 100

Grade: F

Growth: 4.7Profit: 2.0Value: 6.7Quality: 8.5
Piotroski: 3/9Altman Z: 3.11

LLY

Strong Buy

76

out of 100

Grade: B+

Growth: 10.0Profit: 10.0Value: 4.3Quality: 6.0
Piotroski: 6/9Altman Z: 2.06
IV

Intrinsic Value Comparison

Multi-model valuation · Graham Formula

CSTLUndervalued (+58.2%)

Margin of Safety

+58.2%

Fair Value

$77.42

Current Price

$21.38

$56.04 discount

UndervaluedFair: $77.42Overvalued

Intrinsic value data unavailable for LLY.

Key Strengths & Concerns

Side-by-side fundamental analysis

Key Strengths

CSTL3 strengths · Avg: 10.0/10
Price/BookValuation
1.4x10/10

Reasonable price relative to book value

Debt/EquityHealth
0.0810/10

Conservative balance sheet, low leverage

Altman Z-ScoreHealth
3.1110/10

Safe zone — low bankruptcy risk

LLY6 strengths · Avg: 10.0/10
Market CapQuality
$1.01T10/10

Mega-cap, among the largest globally

Return on EquityProfitability
81.0%10/10

Every $100 of equity generates 81 in profit

Profit MarginProfitability
35.0%10/10

Keeps 35 of every $100 in revenue as profit

Operating MarginProfitability
49.4%10/10

Strong operational efficiency at 49.4%

Revenue GrowthGrowth
55.5%10/10

Revenue surging 55.5% year-over-year

EPS GrowthGrowth
169.9%10/10

Earnings expanding 169.9% YoY

Areas to Watch

CSTL4 concerns · Avg: 2.5/10
Market CapQuality
$627.83M3/10

Smaller company, higher risk/reward

Piotroski F-ScoreQuality
3/93/10

Weak financial health signals

Return on EquityProfitability
-2.8%2/10

ROE of -2.8% — below average capital efficiency

Revenue GrowthGrowth
-4.9%2/10

Revenue declined 4.9%

LLY4 concerns · Avg: 2.8/10
PEG RatioValuation
1.524/10

Expensive relative to growth rate

Debt/EquityHealth
1.393/10

Elevated debt levels

P/E RatioValuation
40.2x2/10

Premium valuation, high expectations priced in

Price/BookValuation
32.0x2/10

Trading at 32.0x book value

Comparative Analysis Report

WallStSmart Research

Bull Case : CSTL

The strongest argument for CSTL centers on Price/Book, Debt/Equity, Altman Z-Score.

Bull Case : LLY

The strongest argument for LLY centers on Market Cap, Return on Equity, Profit Margin. Profitability is solid with margins at 35.0% and operating margin at 49.4%. Revenue growth of 55.5% demonstrates continued momentum.

Bear Case : CSTL

The primary concerns for CSTL are Market Cap, Piotroski F-Score, Return on Equity.

Bear Case : LLY

The primary concerns for LLY are PEG Ratio, Debt/Equity, P/E Ratio. A P/E of 40.2x leaves little room for execution misses.

Key Dynamics to Monitor

CSTL profiles as a turnaround stock while LLY is a growth play — different risk/reward profiles.

CSTL carries more volatility with a beta of 1.02 — expect wider price swings.

LLY is growing revenue faster at 55.5% — sustainability is the question.

LLY generates stronger free cash flow (3.0B), providing more financial flexibility.

Bottom Line

LLY scores higher overall (76/100 vs 31/100), backed by strong 35.0% margins and 55.5% revenue growth. CSTL offers better value entry with a 58.2% margin of safety. Both earn "Strong Buy" and "Avoid" ratings respectively — the choice depends on your investment horizon and risk tolerance.

This analysis is generated from publicly available financial data. Not financial advice.

Castle Biosciences Inc

HEALTHCARE · DIAGNOSTICS & RESEARCH · USA

Castle Biosciences Inc. is a leading diagnostics company dedicated to improving patient care through cutting-edge gene-expression profiling tests, specifically in the realm of skin cancer, with its flagship product, DecisionDx®-Melanoma. This innovative solution provides crucial insights into patient risk stratification, thus facilitating informed treatment decisions in melanoma management. With a steadfast commitment to precision medicine and a robust research and development framework, Castle Biosciences is strategically positioned to expand its portfolio and address pivotal clinical needs. By focusing on the complexities of oncology, the company aims to enhance clinical outcomes while driving significant value for shareholders.

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Eli Lilly and Company

HEALTHCARE · DRUG MANUFACTURERS - GENERAL · USA

Eli Lilly and Company is an American pharmaceutical company headquartered in Indianapolis, Indiana, with offices in 18 countries. Its products are sold in approximately 125 countries.

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