NASDAQ:CSTL

Castle Biosciences Stock Insider Trading

Healthcare > Medical - Diagnostics & Research

Buy CSTL

*Your capital is at risk

$24.11

-0.600 (-2.43%)

At Close: Jul 02, 2026

Castle Biosciences Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -58.38. In total, the insiders bought 545.84K and sold 188.48K CSTL shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-58.38
● Buy	545.84K shares
● Sell	188.48K shares
50% Buy Activity Weak Negative Correlation
Buy Signal Low Confidence May 22, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -58.38. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Jun 16, 2026 Sell	Common Stock S-Sale	Oelschlager Kristen M Chief Operating Officer	C-Suite Officer	8 587 Value: $177.8K
Jun 15, 2026 Sell	Common Stock S-Sale	Maetzold Derek J Pres. & Chief Exec. Officer	Officer	1 357 Value: $28.0K
Jun 15, 2026 Sell	Common Stock S-Sale	Maetzold Derek J Pres. & Chief Exec. Officer	Officer	1 153 Value: $23.8K
Jun 15, 2026 Buy	Common Stock M-Exempt	Maetzold Derek J Pres. & Chief Exec. Officer	Officer	550 Value: $1K
Jun 15, 2026 Sell	Common Stock S-Sale	Maetzold Derek J Pres. & Chief Exec. Officer	Officer	550 Value: $11.4K
Jun 15, 2026 Sell	Common Stock S-Sale	Maetzold Derek J Pres. & Chief Exec. Officer	Officer	278 Value: $6K
Jun 15, 2026 Buy	Stock option (right to buy) M-Exempt	Maetzold Derek J Pres. & Chief Exec. Officer	Officer	550 Value: $1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Olson Tiffany Director	Director	11 766 Value: $260.1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Goldberg Ellen Director	Director	11 766 Value: $260.1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Caple Kim Director	Director	11 766 Value: $260.1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Cole G Bradley Director	Director	11 766 Value: $260.1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Bradbury Daniel Director	Director	11 766 Value: $260.1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Cotton Rodney Director	Director	11 766 Value: $260.1K
May 28, 2026 Buy	Restricted Stock Units A-Award	Harrison Miles Director	Director	11 766 Value: $260.1K
May 22, 2026 Buy	Common Stock M-Exempt	Cotton Rodney Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Common Stock M-Exempt	Bradbury Daniel Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Restricted Stock Units M-Exempt	Bradbury Daniel Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Common Stock M-Exempt	Harrison Miles Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Restricted Stock Units M-Exempt	Harrison Miles Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Common Stock M-Exempt	Olson Tiffany Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Restricted Stock Units M-Exempt	Cole G Bradley Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Common Stock M-Exempt	Cole G Bradley Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Restricted Stock Units M-Exempt	Olson Tiffany Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Common Stock M-Exempt	Caple Kim Director	Director	13 667 Value: $275.4K
May 22, 2026 Buy	Restricted Stock Units M-Exempt	Goldberg Ellen Director	Director	13 667 Value: $275.4K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT CASTLE BIOSCIENCES, INC.

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 also offers DecisionDx-UM test, a proprietary GEP test that predicts the risk of metastasis for patients w...

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