Derek J Maetzold Castle Biosciences Inc (CSTL) insider trading activity

Derek J Maetzold is Pres. & Chief Exec. Officer of CASTLE BIOSCIENCES INC. Currently has a direct ownership of 91,732 shares of CSTL, which is worth approximately $3.07 Million. The most recent transaction as insider was on Aug 08, 2025, when has been sold 66,991 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 91.7K

42.6% 3M change

13.5% 12M change

Total Value Held $3.07 Million

DEREK J MAETZOLD Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Aug 08 2025	BUY Exercise of conversion of derivative security	-	66,991 Added 32.89%	136,674 Common Stock
Jun 27 2025	SELL Open market or private sale	$100,363 $20.3 p/Share	4,944 Reduced 6.62%	69,683 Common Stock
Apr 21 2025	SELL Open market or private sale	$26,598 $21.52 p/Share	1,236 Reduced 1.63%	74,627 Common Stock
Apr 09 2025	SELL Open market or private sale	$20,685 $20.22 p/Share	1,023 Reduced 1.33%	75,863 Common Stock
Apr 08 2025	SELL Open market or private sale	$4,266 $20.03 p/Share	213 Reduced 0.28%	76,886 Common Stock
Mar 26 2025	SELL Open market or private sale	$25,090 $20.3 p/Share	1,236 Reduced 1.58%	77,099 Common Stock
Mar 10 2025	SELL Open market or private sale	$41,577 $19.52 p/Share	2,130 Reduced 2.65%	78,335 Common Stock

Mar 07 2025	SELL Open market or private sale	$461,835 $20.4 p/Share	22,639 Reduced 21.96%	80,465 Common Stock
Mar 04 2025	SELL Open market or private sale	$26,012 $20.86 p/Share	1,247 Reduced 1.2%	103,104 Common Stock
Mar 04 2025	SELL Payment of exercise price or tax liability	$168,414 $22.23 p/Share	7,576 Reduced 6.77%	104,351 Common Stock
Mar 04 2025	BUY Exercise of conversion of derivative security	-	31,109 Added 21.75%	111,927 Common Stock
Jan 13 2025	SELL Open market or private sale	$28,150 $28.55 p/Share	986 Reduced 1.21%	80,818 Common Stock
Jan 07 2025	SELL Open market or private sale	$7,324 $30.14 p/Share	243 Reduced 0.3%	81,804 Common Stock
Jan 06 2025	SELL Open market or private sale	$79,386 $29.24 p/Share	2,715 Reduced 3.2%	82,047 Common Stock
Dec 17 2024	SELL Open market or private sale	$267,342 $28.55 p/Share	9,364 Reduced 9.95%	84,762 Common Stock
Dec 16 2024	SELL Open market or private sale	$318,830 $28.83 p/Share	11,059 Reduced 10.51%	94,126 Common Stock
Dec 13 2024	SELL Open market or private sale	$388,637 $28.82 p/Share	13,485 Reduced 11.36%	105,185 Common Stock
Dec 10 2024	SELL Payment of exercise price or tax liability	$242,373 $29.63 p/Share	8,180 Reduced 6.45%	118,670 Common Stock
Dec 10 2024	BUY Exercise of conversion of derivative security	-	20,787 Added 14.28%	124,740 Common Stock
Dec 09 2024	SELL Payment of exercise price or tax liability	$407,424 $30.91 p/Share	13,181 Reduced 11.05%	106,063 Common Stock
Dec 09 2024	BUY Exercise of conversion of derivative security	-	33,496 Added 21.93%	119,244 Common Stock
Dec 05 2024	SELL Open market or private sale	$61,822 $31.35 p/Share	1,972 Reduced 2.25%	85,748 Common Stock
Nov 12 2024	SELL Open market or private sale	$67,343 $34.15 p/Share	1,972 Reduced 2.2%	87,720 Common Stock
Nov 04 2024	SELL Open market or private sale	$64,760 $32.84 p/Share	1,972 Reduced 2.15%	89,692 Common Stock
Oct 14 2024	SELL Open market or private sale	$63,636 $32.27 p/Share	1,972 Reduced 2.11%	91,664 Common Stock

DJM

Derek J Maetzold

Pres. & Chief Exec. Officer

Friendswood, TX

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