InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (191 ops.)
Insider track record
CEODisclosed buys
0
Disclosed sells
191
T+90 hit rate
43%
T+90 mean return
-9.7%
Across 7 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Discover the full record of transactions filed by MAETZOLD DEREK J, Founder, President and Chief Executive Officer. Director active across 1 company, notably Castle Biosciences INC. Aggregated, 210 filings have been published. Breakdown: 0 buy · 191 sells. Total volume traded: €13.9m. History available since 11 May 2021. The latest transaction was disclosed on 1 July 2026 (Levée d'options). Regulator: SEC (Form 4). All data is free.
Declarations210 total
6,214 shares@ US$2.39Common StockSEC:0001628280-26-047287:0
6,214 shares@ US$24.29Common StockSEC:0001628280-26-047287:1
1,357 shares@ US$24.29Common StockSEC:0001628280-26-047287:2
1,153 shares@ US$24.29Common StockSEC:0001628280-26-047287:3
278 shares@ US$24.29Common StockSEC:0001628280-26-047287:4
278 shares@ US$24.29Common StockSEC:0001628280-26-047287:5
278 shares@ US$24.29Common StockSEC:0001628280-26-047287:6
278 shares@ US$24.29Common StockSEC:0001628280-26-047287:7
550 sharesCommon StockSEC:0001628280-26-044019:0
550 sharesCommon StockSEC:0001628280-26-044019:1
1,357 sharesCommon StockSEC:0001628280-26-044019:2
1,153 sharesCommon StockSEC:0001628280-26-044019:3
278 sharesCommon StockSEC:0001628280-26-044019:4
278 sharesCommon StockSEC:0001628280-26-044019:5
278 sharesCommon StockSEC:0001628280-26-044019:6
278 sharesCommon StockSEC:0001628280-26-044019:7
204 shares@ US$2.390.0000% mcap0.0% of flowCommon StockSEC:0001628280-26-040260:0
6,010 shares@ US$2.390.0011% mcap0.1% of flowCommon StockSEC:0001628280-26-040260:1
6,214 shares@ US$20.8570.0097% mcap0.8% of flowCommon StockSEC:0001628280-26-040260:2
1,357 shares@ US$20.8570.0021% mcap0.2% of flowCommon StockSEC:0001628280-26-040260:3
1,153 shares@ US$20.8570.0018% mcap0.1% of flowCommon StockSEC:0001628280-26-040260:4
278 shares@ US$20.8570.0004% mcap0.0% of flowCommon StockSEC:0001628280-26-040260:5
278 shares@ US$20.8570.0004% mcap0.0% of flowCommon StockSEC:0001628280-26-040260:6
278 shares@ US$20.8570.0004% mcap0.0% of flowCommon StockSEC:0001628280-26-040260:7
278 shares@ US$20.8570.0004% mcap0.0% of flowCommon StockSEC:0001628280-26-040260:8
25 of 210 declarations
About MAETZOLD DEREK J
Derek J. Maetzold founded Castle Biosciences in September 2007 and has served as its President, Chief Executive Officer, and a member of the board of directors since inception. Castle Biosciences says he previously held leadership roles at Encysive Pharmaceuticals, Schering-Plough, Integrated Communications, Amylin Pharmaceuticals, and Sandoz Pharmaceuticals, and that he earned a B.S. in Biology from George Mason University. Sources: https://www.castlebiosciences.com/company/leadership-and-board-of-directors
