Jim Simons Castle Biosciences Inc Transaction History

Renaissance Technologies LLC

$70.6 Billion
Q3 2025

A detailed history of Jim Simons (Renaissance Technologies LLC) transactions in Castle Biosciences Inc stock. As of the latest transaction made, Renaissance Technologies LLC holds 562,600 shares of CSTL stock, worth $18.8 Million. This represents 0.02% of its overall portfolio holdings.

Number of Shares

562,600

Previous 670,500 16.09%

Holding current value

$18.8 Million

Previous $13.7 Million 6.43%

% of portfolio

0.02%

Previous 0.02%

22 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 13, 2025	SELL	$14.65 - $24.65 $1.58 Million - $2.66 Million	-107,900 Reduced 16.09%	562,600 $12.8 Million
Q2 2025 Aug 13, 2025	SELL	$15.8 - $21.98 $485,060 - $674,786	-30,700 Reduced 4.38%	670,500 $13.7 Million
Q1 2025 May 14, 2025	BUY	$18.76 - $32.72 $303,912 - $530,064	16,200 Added 2.36%	701,200 $14 Million
Q4 2024 Feb 13, 2025	BUY	$26.52 - $34.67 $5.18 Million - $6.78 Million	195,438 Added 39.92%	685,000 $18.3 Million
Q3 2024 Nov 13, 2024	BUY	$17.4 - $31.47 $3.27 Million - $5.92 Million	188,062 Added 62.38%	489,562 $14 Million

Q2 2024 Aug 09, 2024	BUY	$18.84 - $24.94 $1.82 Million - $2.41 Million	96,800 Added 47.29%	301,500 $6.56 Million
Q1 2024 May 13, 2024	BUY	$18.06 - $25.3 $1.67 Million - $2.34 Million	92,300 Added 82.12%	204,700 $4.53 Million
Q4 2023 Feb 13, 2024	BUY	$12.19 - $22.43 $68,264 - $125,608	5,600 Added 5.24%	112,400 $2.43 Million
Q3 2023 Nov 14, 2023	SELL	$13.28 - $20.3 $871,168 - $1.33 Million	-65,600 Reduced 38.05%	106,800 $1.8 Million
Q2 2023 Aug 11, 2023	BUY	$11.66 - $26.0 $1.59 Million - $3.54 Million	136,000 Added 373.63%	172,400 $2.37 Million
Q1 2023 May 12, 2023	BUY	$19.47 - $28.49 $278,421 - $407,407	14,300 Added 64.71%	36,400 $827,000
Q4 2022 Feb 13, 2023	BUY	$18.08 - $30.0 $92,207 - $153,000	5,100 Added 30.0%	22,100 $520,000
Q3 2022 Nov 14, 2022	SELL	$22.51 - $34.32 $9,004 - $13,728	-400 Reduced 2.3%	17,000 $443,000
Q2 2022 Aug 12, 2022	SELL	$16.0 - $45.99 $121,600 - $349,524	-7,600 Reduced 30.4%	17,400 $382,000
Q1 2022 May 13, 2022	SELL	$33.17 - $46.98 $3.62 Million - $5.13 Million	-109,281 Reduced 81.38%	25,000 $1.12 Million
Q4 2021 Feb 11, 2022	BUY	$39.06 - $67.58 $5.25 Million - $9.07 Million	134,281 New	134,281 $5.76 Million
Q2 2021 Aug 13, 2021	SELL	$50.07 - $76.78 $1.38 Million - $2.11 Million	-27,500 Closed	0 $0
Q1 2021 May 13, 2021	BUY	$58.92 - $97.33 $1.62 Million - $2.68 Million	27,500 New	27,500 $1.88 Million
Q4 2020 Feb 10, 2021	SELL	$43.6 - $73.05 $170,040 - $284,895	-3,900 Closed	0 $0
Q3 2020 Nov 13, 2020	SELL	$38.47 - $52.03 $1.5 Million - $2.03 Million	-38,936 Reduced 90.9%	3,900 $201,000
Q2 2020 Aug 13, 2020	BUY	$27.28 - $43.01 $262,870 - $414,444	9,636 Added 29.02%	42,836 $1.61 Million
Q1 2020 May 14, 2020	BUY	$23.08 - $35.53 $766,256 - $1.18 Million	33,200 New	33,200 $990,000

Others Institutions Holding CSTL

# of Institutions

185

Shares Held

27M

Call Options Held

42.2K

Put Options Held

9.3K

View Full List

About CASTLE BIOSCIENCES INC

Ticker CSTL
Exchange NASDAQ
Sector Healthcare
Industry Diagnostics & Research
Shares Outstandng 26,297,000
Market Cap $880M
Description
Castle Biosciences, Inc., a commercial-stage diagnostics company, focuses to provide diagnostic and prognostic testing services for dermatological cancers. Its lead product is DecisionDx-Melanoma, a multi-gene expression profile (GEP) test to identify the risk of metastasis for patients diagnosed with invasive cutaneous melanoma. The company als...

More about CSTL

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