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CSTL
Castle Biosciences, Inc. Common Stock
stockNASDAQ

At CloseOct 2, 2026 3:59:53 PM EDT
35.58USD+0.936%(+0.33)167,719
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Healthcare
Diagnostics & Research
HQ
Friendswood, TX, USA
Previous Close
$35.26
Beta
0.86
52-Week High
$44.28 2026-01-26
52-Week Low
$17.72 2026-05-14
SMA 50
$32.33
SMA 200
$29.09
Avg. Vol 10D
392,443
Avg. Vol 30D
358,077
Avg. Vol 90D
387,632
Relative Vol
0.47
26.99M
0.4100%
Nov 2, 2026 (28d)
CSTL Profile

castle biosciences, inc. specializes in diagnostic tests for cancers. founded in 2008, the company goal has been to help advance the care for cancers through objective testing. our team works with outstanding members of the oncology community throughout the discovery, development and utilization of these tests. currently, castle biosciences has tests to help doctors treat cutaneous melanoma, uveal melanoma, esophageal adenocarcinoma, mesothelioma and glioma. we have active research programs in rectal cancer and soft tissue sarcoma, and anticipate tests for these and other under-served cancers to be available in the near future please visit us at www.castlebiosciences.com for more information on our company and products.

CSTL Performance
PeriodPriceDateChangeBeta
1W35.932026-09-28-1.10%1.342
1M32.912026-09-04+7.98%0.113
3M24.212026-07-06+46.78%1.392
6M24.732026-04-06+43.69%0.874
1Y22.722025-10-03+56.40%0.861
2Y29.352024-10-04+21.07%—
5Y60.442021-10-04-41.21%1.417
CSTL Stock Summary

Castle Biosciences, Inc. Common Stock (NASDAQ:CSTL) stock price today is $35.54, and today's volume is 167,719. CSTL is up 0.794% today. The 30 day average volume is 358,077. CSTL market cap is $1.09B with 30.55M shares outstanding.