Castle Biosciences (CSTL) Market Capitalization (2019 - 2026)
Castle Biosciences' (CSTL) quarterly Market Capitalization came in at $727.6 million in Q2 2026, up 22.95% year-over-year from $591.8 million in Q2 2025, and down 2.17% quarter-over-quarter from $743.8 million in Q1 2026.
Castle Biosciences (CSTL) Market Capitalization (2019 - 2026) Analysis & Trends
Castle Biosciences has disclosed Market Capitalization across 8 years of filings, most recently posting $727.6 million for Q2 2026.
- In Q2 2026, Market Capitalization rose 22.95% year-over-year to $727.6 million; the TTM figure through Jun 2026 stood at $727.6 million (up 22.95% YoY), while the FY2025 annual figure was $1.2 billion, up 52.13% from the prior year.
- Market Capitalization came in at $727.6 million for Q2 2026 at Castle Biosciences, down from $743.8 million in the prior quarter.
- In the past five years, Market Capitalization ranged from a high of $1.2 billion in Q4 2025 to a low of $367.5 million in Q2 2023.
- Average Market Capitalization over 5 years is $682.4 million, with a median of $618.0 million recorded in 2022.
- Year-over-year, Market Capitalization tumbled 68.72% in 2022 and soared 75.67% in 2024.
- Over 5 years, Market Capitalization stood at $625.1 million in 2022, then slipped by 5.37% to $591.5 million in 2023, then increased by 28.33% to $759.1 million in 2024, then surged by 52.13% to $1.2 billion in 2025, then plunged by 36.99% to $727.6 million in 2026.
- Per Business Quant data, the three most recent Market Capitalization figures were $727.6 million in Q2 2026, $743.8 million in Q1 2026, and $1.2 billion in Q4 2025.
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) |
|---|---|---|---|---|
| 1 | Natera | 53.05 Bn | 51.95 Bn | 486.15 Mn |
| 2 | Quest Diagnostics | 27.19 Bn | 26.87 Bn | 1.03 Bn |
| 3 | Labcorp Holdings | 25.93 Bn | 25.81 Bn | 1.11 Bn |
| 4 | Guardant Health | 23.97 Bn | 22.91 Bn | 219.03 Mn |
| 5 | Tempus AI | 13.64 Bn | 12.82 Bn | 274.25 Mn |
| 6 | Caris Life Sciences | 8.47 Bn | 7.68 Bn | 182.38 Mn |
| 7 | Sotera Health | 5.35 Bn | 4.99 Bn | 177.96 Mn |
| 8 | BillionToOne | 4.96 Bn | 4.41 Bn | 77.11 Mn |
| 9 | Adaptive Biotechnologies | 4.55 Bn | 4.21 Bn | 51.39 Mn |
| 10 | Castle Biosciences | 1.08 Bn | 811.36 Mn | 79.85 Mn |
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | 727.63 Mn |
| Mar 31, 2026 | 743.77 Mn |
| Dec 31, 2025 | 1.15 Bn |
| Sep 30, 2025 | 664.02 Mn |
| Jun 30, 2025 | 591.80 Mn |
| Mar 31, 2025 | 577.48 Mn |
| Dec 31, 2024 | 759.08 Mn |
| Sep 30, 2024 | 797.87 Mn |
| Jun 30, 2024 | 603.27 Mn |
| Mar 31, 2024 | 611.02 Mn |
| Dec 31, 2023 | 591.52 Mn |
| Sep 30, 2023 | 454.18 Mn |
| Jun 30, 2023 | 367.48 Mn |
| Mar 31, 2023 | 606.31 Mn |
| Dec 31, 2022 | 625.07 Mn |
| Sep 30, 2022 | 687.22 Mn |
| Jun 30, 2022 | 577.12 Mn |
| Mar 31, 2022 | 1.14 Bn |
| Dec 31, 2021 | 1.09 Bn |
| Sep 30, 2021 | 1.68 Bn |
Castle Biosciences Market Capitalization API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=market-capitalization&ticker=CSTL&period=max&api_key=YOUR_API_KEY
import requests
url = "https://data.businessquant.com/historic"
params = {"slug": "market-capitalization", "ticker": "CSTL", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()
const res = await fetch("https://data.businessquant.com/historic?slug=market-capitalization&ticker=CSTL&period=max&api_key=YOUR_API_KEY");
const data = await res.json();