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Castle Biosciences, Inc. Share Price

Castle Biosciences, Inc. Share Price

NASDAQ: CSTL | Small Cap
$32.01
+$1.63 (5.37%) Last updated on 08 Aug, 2026 | 01:29 IST
  • Performance
  • Chart
  • Fundamentals
  • Quarterly P&L
  • Annual P&L
  • About
  • Price history
  • FAQs

Castle Biosciences, Inc. Stock Performance

Open
$31.51
Prev. Close
$30.38
Circuit Range
N/A
Day Range
$31.46 - $32.37
Year Range
$17.84 - $44.13
Volume
13,870
Average Traded
$31.93

Castle Biosciences, Inc. Share Price Today

As of 10 August 2026, Castle Biosciences, Inc.'s share price is $32.01. The stock opened at $31.51, compared to its previous close of $30.38. During today's trading session, Castle Biosciences, Inc.'s share price traded between $31.46 and $32.37, with an average price of $31.91. Over the past 52 weeks, the stock has recorded a high of $44.13 and a low of $17.84. In terms of performance, Castle Biosciences, Inc.'s share price has risen by 8.53% over the last six months and is up 33.13% on a year-on-year basis.

Castle Biosciences, Inc. Share Price Chart

$31.46$32.37
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Castle Biosciences, Inc. Stock Fundamentals & Key Indicators

Market Cap
$927.70M
PE Ratio (TTM)
-38.56
Dividend Yield
N/A
EPS (TTM)
$-0.83
Revenue (TTM)
$344.23M
Return On Equity (TTM)
-5.13%
Profit Margin
-7.02%
Debt to Equity
0.15
Quarterly Earnings Growth YoY
-122.08%

Castle Biosciences, Inc. Quarterly Profit & Loss

All figures in USD

ParticularsMar 2024Jun 2024Sep 2024Mar 2025Jun 2025Sep 2025
Revenue$72.97M$87.00M$85.78M$87.99M$86.19M$83.04M
Net Profit-$2.53M$8.92M$2.27M-$25.85M$4.52M-$501000.00
Net Profit Margin-3.47%10.25%2.65%-29.38%5.25%-0.60%
Income ChangeN/A452.01%-74.56%-1239.18%117.50%-111.08%

Castle Biosciences, Inc. Annual Profit & Loss

All figures in USD

Particulars20212022202320242025
Revenue$94.08M$137.04M$219.79M$332.07M$344.23M
Net Profit-$31.29M-$67.14M-$57.47M$18.25M-$24.16M
Net Profit Margin-33.26%-48.99%-26.15%5.49%-7.02%
Income ChangeN/A-114.55%14.41%131.75%-232.41%

About Castle Biosciences, Inc.

Castle Biosciences, Inc., a molecular diagnostics company, provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), uveal melanoma, and mental health conditions. The company offers DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test that predicts the risk of metastasis for patients with uveal melanoma; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a risk stratification spatial-omics test to predict future development of progression of high-grade dysplasia and/or esophageal cancer in patients with non-dysplastic, indefinite dysplasia, and low-grade dysplasia BE. It also provides DecisionDx-UM, a risk stratification GEP test that predicts the risk of metastasis for patients with uveal melanoma; and IDgenetix, a pharmacogenomic test that helps guide optimal drug treatment for patients diagnosed with major depressive disorder, schizophrenia, bipolar disorder, anxiety disorders, social phobia, obsessive-compulsive personality disorder, post-traumatic stress disorder, and attention deficit hyperactivity disorder. The company offers its products to skin cancer and gastroenterology markets. The company was incorporated in 2007 and is headquartered in Friendswood, Texas.

Castle Biosciences, Inc. Historical Returns

MonthOpenCloseChange %
Aug 2026
$27.91
$32.10
+14.40%
Jul 2026
$23.91
$28.06
+17.75%
Jun 2026
$21.02
$23.83
+13.05%
May 2026
$24.58
$21.08
-13.85%
Apr 2026
$24.89
$24.47
-0.33%
Mar 2026
$28.66
$24.55
-16.75%
Feb 2026
$39.84
$29.49
-25.11%
Jan 2026
$39.12
$39.38
+1.31%
Dec 2025
$39.70
$38.87
-2.31%
Nov 2025
$25.91
$39.79
+56.04%
Oct 2025
$22.88
$25.50
+11.89%
Sep 2025
$23.80
$22.79
-5.20%

CSTL Share Price FAQs

What is Castle Biosciences, Inc. share price today?

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Castle Biosciences, Inc. share price today is $32.01 as on August 8, 2026 at 1:29 am IST.

What is the 52 week high and 52 week low of Castle Biosciences, Inc. stock?

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The 52 week high of Castle Biosciences, Inc. stock is $44.13, while the 52 week low is $17.84 as of 8 Aug '26.

What is CSTL's market capitalisation today?

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CSTL market capitalisation is $927.70M as of August 10, 2026, at 6:42 am IST.

What is CSTL's net income for the last quarter?

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CSTL's net income for the last quarter is -0.00B USD.

What is the 5 year returns of CSTL?

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The 5 year returns of CSTL is -58.31% as on 8 Aug '26.

What is the high & low stock price of CSTL today?

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CSTL stock price hit a high of $32.37 and low of $31.46 as of 8 Aug '26.

Can I buy CSTL shares in India?

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Yes. You can buy CSTL in India by opening an international trading account.