$CSTL
Castle Biosciences, Inc. Common Stock
XNAS•Health Care•Services-Medical Laboratories
$33.14
▲+0.18%+$0.060
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Plans & pricingDonateCastle Biosciences, Inc. Common Stock
XNAS•Health Care•Services-Medical Laboratories
Why is CSTL up today? It is at $33.14 (+0.00%), and our scanner flagged it 44 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment CSTL spikes, and full due diligence on CSTL — key stats, earnings, dilution and insider activity. Free.
Our scanner flagged $CSTL 44 times in the last 30 days. Create a free account to track $CSTL, build a watchlist, and get instant unusual-volume alerts, with a full day of premium now and 5 more when you verify your email, no card needed.
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Here is the latest on CSTL from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for CSTL today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
Likely catalystCASTLE BIOSCIENCES INC: Q2 FY2026 results, three months to Jun 30, 2026, from an SEC filing. Read it →Latest filing4Insider trade (Form 4)Oct 21, 2026 · 4 days agoSources: float & market cap via Polygon · short interest via FINRA · borrow & shortability via Alpaca · SSR from Reg SHO 201 · filings & dilution via SEC EDGAR · analysts via Nasdaq.
Auto-generated from public data for research and education. Not investment advice.
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Maetzold Derek J Officer | Sold (automatic/other) | -9K 0.03% of company | sold 41% | 12K | $274K at $31.91 | Oct 19, 26 |
Maetzold Derek J Officer | Sold (automatic/other) | -6K 0.02% of company | sold 3.6% | 158K | $189K at $31.91 | Oct 19, 26 |
Juvenal Tobin W Officer | Sold (automatic/other) | -3K 0.01% of company | sold 6.3% | 49K | $111K at $33.64 | Oct 12, 26 |
Maetzold Derek J Officer | Sold (automatic/other) | -9K 0.03% of company | sold 29% | 21K | $305K at $35.57 | Oct 5, 26 |
Maetzold Derek J Officer | Sold (automatic/other) | -6K 0.02% of company | sold 3.5% | 164K | $210K at $35.57 | Oct 5, 26 |
Maetzold Derek J Officer | Other | 8K 0.03% of company | added 38% | 30K | $20K at $2.39 | Oct 5, 26 |
Oelschlager Kristen M Officer | Sold (automatic/other) | -4K 0.01% of company | sold 24% | 13K | $148K at $35.75 | Oct 1, 26 |
Oelschlager Kristen M Officer | Other | 4K 0.01% of company | added 31% | 18K | $14K at $3.38 | Oct 1, 26 |
Juvenal Tobin W Officer | Sold (automatic/other) | -1K | sold 1.9% | 52K | $35K at $34.20 | Sep 30, 26 |
Juvenal Tobin W Officer | Sold (automatic/other) | -6K 0.02% of company | sold 9.5% | 53K | $197K at $35.50 | Sep 29, 26 |
Maetzold Derek J Officer | Sold (automatic/other) | -9K 0.03% of company | sold 29% | 21K | $303K at $35.33 | Sep 21, 26 |
Maetzold Derek J Officer | Sold (automatic/other) | -6K 0.02% of company | sold 3.4% | 170K | $209K at $35.33 | Sep 21, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
Blend of news sentiment, today’s move, and community votes. Not investment advice.
News, unusual-volume alerts, AI-trader trades and community chatter - the whole story, newest first.
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Here is the latest on CSTL from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for CSTL today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
CSTL last traded at $33.14, up 0.00% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Castle Biosciences, Inc. Common Stock (CSTL) is next expected to report earnings on Thursday, November 5, 2026 (after close), about 10 days away. Earnings reports often cause large overnight gaps, so many traders manage risk around the date. The date can shift until the company officially confirms it.
The CSTL Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged CSTL 44 times in the last 30 days.
CSTL (Castle Biosciences, Inc. Common Stock) trades on XNAS, with a market cap of about $1.01B in the Services-Medical Laboratories sector.
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge CSTL for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.
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