Institutional shares held 26 Million
128K calls
35.4K puts
Total value of holdings $522M
$2.57M calls
$711K puts
Market Cap $528M
26,297,000 Shares Out.
Institutional ownership 98.82%
# of Institutions 207


Latest Institutional Activity in CSTL

Top Purchases

Q1 2025
Allspring Global Investments Holdings, LLC Shares Held: 218K ($4.38M)
Q1 2025
Principal Financial Group Inc Shares Held: 1.47M ($29.5M)
Q1 2025
First Bank & Trust Shares Held: 15.1K ($304K)
Q1 2025
Summit Global Investments Shares Held: 30.6K ($616K)
Q1 2025
Truist Financial Corp Shares Held: 22.3K ($448K)

Top Sells

Q1 2025
Harbor Capital Advisors, Inc. Shares Held: 16.6K ($333K)
Q1 2025
Palisade Capital Management LLC Shares Held: 490K ($9.84M)
Q1 2025
Tritonpoint Wealth, LLC Shares Held: 41.6K ($836K)
Q1 2025
Gamma Investing LLC Shares Held: 218 ($4.38K)
Q1 2025
Envestnet Asset Management Inc Shares Held: 69.8K ($1.4M)

About CSTL

Castle Biosciences, Inc., a commercial-stage diagnostics company, focuses to provide diagnostic and prognostic testing services for dermatological cancers. Its lead product is DecisionDx-Melanoma, a multi-gene expression profile (GEP) test to identify the risk of metastasis for patients diagnosed with invasive cutaneous melanoma. The company also offers DecisionDx-UM test, a proprietary GEP test that predicts the risk of metastasis for patients with uveal melanoma, a rare eye cancer; DecisionDx-SCC, a proprietary 40-gene expression profile test that uses an individual patient's tumor biology to predict individual risk of squamous cell carcinoma metastasis for patients with one or more risk factors; and DecisionDx DiffDx-Melanoma and myPath Melanoma, a proprietary GEP test to diagnose suspicious pigmented lesions. It offers test services through physicians and their patients. The company was founded in 2007 and is headquartered in Friendswood, Texas.


Insider Transactions at CSTL

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
366K Shares
From 16 Insiders
Exercise of conversion of derivative security 268K shares
Grant, award, or other acquisition 98K shares
Sell / Disposition
395K Shares
From 9 Insiders
Open market or private sale 298K shares
Payment of exercise price or tax liability 96.1K shares

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