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Castle Biosciences (CSTL) Insider Trading & Ownership

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$35.81 +0.62 (+1.76%)
Closing price 09/25/2026 04:00 PM Eastern
Extended Trading
$35.71 -0.10 (-0.28%)
As of 09/25/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.

Castle Biosciences (NASDAQ:CSTL) Insider Buying and Selling Activity

Current
Insider Ownership
Percentage
6.10%
Number Of
Insiders Buying
(Last 12 Months)
0
Number Of
Insiders Selling
(Last 12 Months)
5
Amount Of
Insider Selling
(Last 12 Months)
$10.82M
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CSTL Insider Buying and Selling by Quarter

Castle Biosciences Insider and Congressional Trades History

Transaction DateInsiderBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails
9/21/2026Sell8,580$35.33$303,131.40  
9/21/2026Sell5,916$35.33$209,012.28  
9/15/2026Sell3,294$35.14$115,751.16  
9/14/2026Sell3,306$32.32$106,849.92  
8/28/2026Sell12,428$33.20$412,609.60  
8/28/2026Sell6,132$33.20$203,582.40  
8/25/2026Sell12,384$34.42$426,257.28  
8/25/2026Sell9,050$35.04$317,112.00  
8/24/2026Sell12,218$33.69$411,624.42  
8/5/2026Sell2,546$30.68$78,111.28  
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8/5/2026Sell1,029$30.68$31,569.72  
8/4/2026Sell20,356$31.11$633,275.16  
8/4/2026Sell15,085$31.11$469,294.35  
8/3/2026Sell10,664$30.35$323,652.40  
8/3/2026Sell7,829$30.35$237,610.15  
8/3/2026Sell8,586$29.77$255,605.22  
8/3/2026Sell1,730$28.25$48,872.50  
7/31/2026Sell6,480$30.15$195,372.00  
7/31/2026Sell3,673$30.15$110,740.95  
7/31/2026Sell17,310$29.31$507,356.10  
7/27/2026Sell6,214$24.16$150,130.24  
7/27/2026Sell3,622$24.16$87,507.52  
7/1/2026Sell6,214$24.29$150,938.06  
7/1/2026Sell3,622$24.29$87,978.38  
7/1/2026Sell8,586$24.42$209,670.12  
6/16/2026Sell8,587$20.71$177,836.77  
6/15/2026Sell550$20.66$11,363.00  
6/15/2026Sell3,622$20.66$74,830.52  
5/21/2026Sell420$20.20$8,484.00  
5/21/2026Sell2,763$20.20$55,812.60  
5/20/2026Sell130$20.00$2,600.00  
5/20/2026Sell859$20.00$17,180.00  
5/7/2026Sell6,214$22.15$137,640.10  
5/7/2026Sell3,622$22.15$80,227.30  
4/21/2026Sell550$25.10$13,805.00  
4/21/2026Sell3,622$25.10$90,912.20  
4/6/2026Sell6,214$25.03$155,536.42  
4/6/2026Sell3,622$25.03$90,658.66  
3/18/2026Sell650$25.39$16,503.50  
3/17/2026Sell18,650$25.93$483,594.50  
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3/12/2026Sell20,863$25.24$526,582.12  
3/5/2026Sell6,001$27.98$167,907.98  
3/5/2026Sell7,403$28.47$210,763.41  
3/3/2026Sell7,000$27.44$192,080.00  
2/4/2026Sell817$37.99$31,037.83  
2/3/2026Sell3,200$39.91$127,712.00  
1/20/2026Sell4,017$40.01$160,720.17  
1/6/2026Sell1,339$40.10$53,693.90  
1/5/2026Sell2,678$38.09$102,005.02  
12/22/2025Sell830$40.35$33,490.50  
12/17/2025Sell509$40.04$20,380.36  
12/17/2025Sell14,888$39.31$585,247.28  
12/4/2025Sell1,339$40.03$53,600.17  
11/25/2025Sell5,115$40.05$204,855.75  
11/24/2025Sell1,301$38.39$49,945.39  
11/20/2025Sell4,693$35.58$166,976.94  
11/5/2025Sell2,678$31.85$85,294.30  
11/4/2025Sell6,695$30.44$203,795.80  
10/31/2025Sell12,678$25.04$317,457.12  
10/20/2025Sell1,339$22.44$30,047.16  
(Data available from 1/1/2013 forward)

CSTL Insider Trading Activity - Frequently Asked Questions

The list of insiders at Castle Biosciences includes Daniel Bradbury, Derek J Maetzold, Frank Stokes, G Bradley Cole, Kristen M Oelschlager, and Tobin W Juvenal. Learn more on insiders at CSTL.

6.10% of Castle Biosciences stock is owned by insiders. Learn more on CSTL's insider holdings.

The following insiders have sold CSTL shares in the last 24 months: Daniel Bradbury ($682,462.25), Derek J Maetzold ($7,237,152.75), Frank Stokes ($567,193.37), G Bradley Cole ($210,763.41), Kristen M Oelschlager ($2,383,698.21), and Tobin W Juvenal ($1,964,155.05).

Insiders have sold a total of 446,089 Castle Biosciences shares in the last 24 months for a total of $13,045,425.04 sold.



Insider trading data for NASDAQ:CSTL was last updated on 9/21/2026, the date of the most recent reported insider or congressional trade. New trades are added as they're reported.
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