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C

Castle Biosciences CSTL · USD

Health Care · US listing · 🇺🇸 United States

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34.38

+5.72%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
BLACKROCK, INC.3m10.22%−122.3k31 Mar 2026
RTW INVESTMENTS, LP2.8m9.45%+643.1k31 Mar 2026
PRINCIPAL FINANCIAL GROUP INC1.8m6.06%−37.8k31 Mar 2026
PORTOLAN CAPITAL MANAGEMENT, LLC1.4m4.63%−379.2k31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC1.2m4.03%+1.2m31 Mar 2026
DIMENSIONAL FUND ADVISORS LP1m3.56%−104k31 Mar 2026
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC940.7k3.22%−118k31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC861.8k2.95%+861.8k31 Mar 2026
ALLIANZ ASSET MANAGEMENT GMBH811.3k2.78%+189k31 Mar 2026
STATE STREET CORP769.1k2.63%+32.6k31 Mar 2026
GEODE CAPITAL MANAGEMENT, LLC728.1k2.49%+13.2k31 Mar 2026
AIGH CAPITAL MANAGEMENT LLC590.6k2.02%−34.1k31 Mar 2026
QUBE RESEARCH & TECHNOLOGIES LTD559.6k1.92%+324.1k31 Mar 2026
PALISADE CAPITAL MANAGEMENT, LP535.9k1.84%−31.9k31 Mar 2026
RENAISSANCE TECHNOLOGIES LLC532.8k1.83%+39.7k31 Mar 2026

Insider trades

Purchases and sales by directors and officers, as filed with the regulator

DateWhoTypeSharesPriceValue
26 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale3.3k25.55$85,289
18 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale65025.39$16,504
17 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale18.7k25.93$483,595
16 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale17.6k25.97$456,408
13 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale13.2k25.45$336,002
12 Mar 2026 ↗Juvenal Tobin WChief Commercial OfficerSale20.9k25.24$526,582
12 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale23.2k25.28$585,942
11 Mar 2026 ↗MAETZOLD DEREK JPres. & Chief Exec. OfficerSale20.4k26.11$532,310
5 Mar 2026 ↗Cole G BradleyDirectorSale7.4k28.47$210,727
5 Mar 2026 ↗Stokes FrankChief Financial OfficerSale6k27.98$167,908
3 Mar 2026 ↗Stokes FrankChief Financial OfficerSale7k27.44$192,073

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

2m

+0.8% on the period before. 6.0 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

41.0%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 18 Sept 2026125 shares
  • 2 Sept 202657 shares
  • 31 Aug 202628 shares
  • 20 Aug 20261,667 shares
  • 17 Aug 202623 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.