CSTL / Castle Biosciences, Inc. - Insider Trading and Ownership Report - SEC Form 3, 4, 5

Insider Trading Chart

Insider Roster and Profitability Metrics

This table shows the list known insiders, and is generated automatically from filings disclosed to the SEC. In addition to the names, most recent title, and director, officer, or 10% owner designation, we provide the latest disclosed holdings. Additionally, when possible we provide the historical trade performance for the insider. The historical trade performance is a weighted average of the performance of actual open-market purchase transactions made by the insider. For more information on how this is calculated, watch this YouTube webinar.

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Track Records of Insider Purchases - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in CSTL / Castle Biosciences, Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical .

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Max	Price at Max	Max Profit ($)	Max Return (%)
2023-06-05	Goldberg Ellen	2,500	17.2700	2,500	17.2700	43,175	256	25.3000	20,075	46.50
2023-06-05	Goldberg Ellen	2,300	11.2300	2,300	11.2300	25,829
2022-11-29	Olson Tiffany	1,162	21.5000	1,162	21.5000	24,983
2022-05-12	Olson Tiffany	220	18.7700	220	18.7700	4,129
2022-05-12	Olson Tiffany	1,100	18.7600	1,100	18.7600	20,636
2019-07-29	Cook Joseph C. III	22,245	16.0000	22,245	16.0000	355,920
2019-07-29	Cook Joseph C. III	312,500	16.0000	312,500	16.0000	5,000,000
2019-07-29	KABAKOFF DAVID S	62,500	16.0000	62,500	16.0000	1,000,000
2019-07-29	Sofinnova HealthQuest Partners, L.P.	62,500	16.0000	62,500	16.0000	1,000,000

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Track Records of Insider Sales - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in CSTL / Castle Biosciences, Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical .

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Min	Price at Min	Max Loss Avoided ($)	Max Loss Avoided (%)
2025-08-27	Oelschlager Kristen M	18,007	21.6900	18,007	21.6900	390,572	0	22.2800	10,625	2.72
2024-03-05	MAETZOLD DEREK J	4,131	21.4140	4,131	21.4140	88,461
2022-08-16	MAETZOLD DEREK J	21	32.8300	21	32.8300	689
2022-08-16	MAETZOLD DEREK J	43	32.8300	43	32.8300	1,412
2021-11-15	MAETZOLD DEREK J	1,012	53.0420	1,012	53.0420	53,679
2021-11-15	MAETZOLD DEREK J	15,394	52.4740	15,394	52.4740	807,785
2021-10-05	BRADBURY DANIEL	1,250	62.9430	1,250	62.9430	78,679
2020-12-01	Spiess Bernhard E.	40,000	49.9700	40,000	49.9700	1,998,800
2020-06-02	Spiess Bernhard E.	400	38.9400	400	38.9400	15,576

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Transaction History

Click the link icon to see the full transaction history. Transactions reported as part of a 10b5-1 automatic trading plan will have an X in the column marked 10b-5.