CASTLE BIOSCIENCES INC(CSTL)— Stock Profile, AI Score & Financials

Healthcare · Nasdaq · AI-powered stock analysis, 32-signal quality score, SEC EDGAR financials, and institutional holdings. Updated .

CASTLE BIOSCIENCES INC (CSTL) stock profile, AI quality score, and SEC EDGAR financial data, a Healthcare sector company. 13F Pro's AI-powered ranking engine scores CSTL at 40.7/100 on a 32-signal composite quality model, placing it at rank #2,093 of 2,962 stocks — the bottom half of the AI-ranked universe. CSTL scores in the top quartile across earnings quality (85.5). Areas of concern include institutional flow (14.7) and profitability (23.4), which score below median versus the broader universe. Shareholder dilution risk is elevated at 13.1/100, reflecting ongoing share issuance or stock-based compensation. Based on the latest XBRL financial filings (Q2 2026), CASTLE BIOSCIENCES INC reports quarterly revenue of $103.5M, net income of $-2.1M, free cash flow of $6.6M. Top institutional holders of CSTL by reported 13-F value include BlackRock, RTW INVESTMENTS, PRINCIPAL FINANCIAL GROUP, based on the most recent SEC filings. CSTL trades on the Nasdaq exchange and files with the SEC under CIK 1447362. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate CSTL daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for CASTLE BIOSCIENCES INC directly from SEC EDGAR.

AI Quality Score

40.7/100

AI Rank

#2,093

Revenue

$103.5M

Net Income

$-2.1M

Free Cash Flow

$6.6M

CSTL key financials by period

CASTLE BIOSCIENCES INC reported revenue, net income and margins by fiscal period, from SEC filings.
PeriodFormRevenueNet incomeOperating margin
FY 202510-K$344.2M$-24.2M-12.4%
FY 202410-K$332.1M$18.2M2.6%
FY 202310-K$219.8M$-57.5M-30.9%
FY 202210-K$137.0M$-67.1M-53.2%
FY 202110-K$94.1M$-31.3M-42.6%
FY 202010-K$62.6M$-10.3M-10.4%

Institutions holding CSTL

Institutional investors reporting a position in CASTLE BIOSCIENCES INC on SEC Form 13F.
InstitutionSharesValueReported
BlackRock3,291,963$78.5M2026-06-30
RTW INVESTMENTS2,778,335$66.3M2026-06-30
PRINCIPAL FINANCIAL GROUP1,726,648$41.2M2026-06-30
VANGUARD CAPITAL MANAGEMENT1,226,497$29.3M2026-06-30
ACADIAN ASSET MANAGEMENT918,668$21.9M2026-06-30
VANGUARD PORTFOLIO MANAGEMENT840,785$20.1M2026-06-30
Allianz Asset Management GmbH811,324$19.9M2026-06-30
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT824,872$19.7M2026-06-30
STATE STREET822,079$19.6M2026-06-30
GEODE CAPITAL MANAGEMENT795,912$19.0M2026-06-30
CSTL

CASTLE BIOSCIENCES INC

CSTL
NasdaqSmall CapHealthcare

13F Pro Quality Score

40.7/100

Rank #2,093 of 2,962 stocks

View Healthcare peers →

Rankings refresh quarterly once 80% of peers have filed (~45 days after quarter-end). Next update: ~Nov 14, 2026.

Revenue Growth

70.7/100

Profitability

23.4/100

Balance Sheet

25.0/100

Earnings Quality

85.5/100

Free Cash Flow

27.0/100

Institutional Flow

14.7/100

Revenue Scale

32.4/100

Dilution Risk

13.1/100

Price Chart

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Key Metrics

Revenue

Q2 2026
EDGAR

$103.55M

Net Income

Q2 2026
EDGAR

$-2.06M

EPS (Diluted)

Q2 2026
EDGAR

$-0.07

ROIC

Q2 2026
EDGAR

-2.5%

Free Cash Flow

Q2 2026
EDGAR

$6.55M

Debt/Equity

Q2 2026
EDGAR

0.03

Top Institutional Holders

as of Q2 2026
$652.83M total

Financial Trends

Revenue & Net Income

Earnings Per Share

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