Castle Biosciences (CSTL)

P/B ratio as of October 2026 : 2.30

According to Castle Biosciences's latest financial reports the company has a price-to-book ratio of 3.02094.
The price-to-book ratio is a way to measure how much the stock market thinks a company is worth compared to how much the company says its assets are worth on paper.

Castle Biosciences - P/B ratio (from 2019 to 2026)

P/B ratio by year

Year	P/B ratio	Change
2026-12-31	N/A	-100%
2025-12-31	2.45	49.78%
2024-12-31	1.64	10.32%
2023-12-31	1.48	-4.5%
2022-12-31	1.55	-41%
2021-12-31	2.63	-34.13%
2020-12-31	4.00	-42%
2019-12-31	6.89
2018-12-31	N/A

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Castle Biosciences (CSTL) - P/B ratio