Castle Biosciences (CSTL) Profit After Tax (2018 - 2026)
Castle Biosciences' (CSTL) quarterly Profit After Tax came in at -$2.1 million in Q2 2026, down 145.54% year-over-year from $4.5 million in Q2 2025, and up 85.81% quarter-over-quarter from -$14.5 million in Q1 2026.
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Castle Biosciences (CSTL) Profit After Tax (2018 - 2026) Analysis & Trends
Castle Biosciences has disclosed Profit After Tax across 9 years of filings, most recently posting -$2.1 million for Q2 2026.
- In Q2 2026, Profit After Tax fell 145.54% year-over-year to -$2.1 million; the TTM figure through Jun 2026 stood at -$19.4 million (down 105.1% YoY), while the FY2025 annual figure was -$24.2 million, down 232.41% from the prior year.
- Profit After Tax came in at -$2.1 million for Q2 2026 at Castle Biosciences, up from -$14.5 million in the prior quarter.
- In the past five years, Profit After Tax ranged from a high of $9.6 million in Q4 2024 to a low of -$29.2 million in Q1 2023.
- Average Profit After Tax over 5 years is -$8.2 million, with a median of -$2.6 million recorded in 2023.
- Year-over-year, Profit After Tax sank 1039.38% in 2023 and jumped 471.71% in 2024.
- Over 5 years, Profit After Tax stood at -$20.6 million in 2022, then surged by 87.49% to -$2.6 million in 2023, then jumped by 471.71% to $9.6 million in 2024, then tumbled by 124.32% to -$2.3 million in 2025, then climbed by 11.66% to -$2.1 million in 2026.
- Per Business Quant data, the three most recent Profit After Tax figures were -$2.1 million in Q2 2026, -$14.5 million in Q1 2026, and -$2.3 million in Q4 2025.
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | PAT (Qtr) |
|---|---|---|---|---|---|
| 1 | Natera | 53.05 Bn | 51.95 Bn | 486.15 Mn | -66.97 Mn |
| 2 | Quest Diagnostics | 27.19 Bn | 26.87 Bn | 1.03 Bn | 334.00 Mn |
| 3 | Labcorp Holdings | 25.93 Bn | 25.81 Bn | 1.11 Bn | 299.10 Mn |
| 4 | Guardant Health | 23.97 Bn | 22.91 Bn | 219.03 Mn | -120.14 Mn |
| 5 | Tempus AI | 13.64 Bn | 12.82 Bn | 274.25 Mn | 5.64 Mn |
| 6 | Caris Life Sciences | 8.47 Bn | 7.68 Bn | 182.38 Mn | -1.00 Mn |
| 7 | Sotera Health | 5.35 Bn | 4.99 Bn | 177.96 Mn | 53.64 Mn |
| 8 | BillionToOne | 4.96 Bn | 4.41 Bn | 77.11 Mn | 8.05 Mn |
| 9 | Adaptive Biotechnologies | 4.55 Bn | 4.21 Bn | 51.39 Mn | -39.94 Mn |
| 10 | Castle Biosciences | 1.08 Bn | 811.36 Mn | 79.85 Mn | -2.06 Mn |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | -2.06 Mn |
| Mar 31, 2026 | -14.52 Mn |
| Dec 31, 2025 | -2.33 Mn |
| Sep 30, 2025 | -501,000.00 |
| Jun 30, 2025 | 4.52 Mn |
| Mar 31, 2025 | -25.85 Mn |
| Dec 31, 2024 | 9.59 Mn |
| Sep 30, 2024 | 2.27 Mn |
| Jun 30, 2024 | 8.92 Mn |
| Mar 31, 2024 | -2.53 Mn |
| Dec 31, 2023 | -2.58 Mn |
| Sep 30, 2023 | -6.91 Mn |
| Jun 30, 2023 | -18.78 Mn |
| Mar 31, 2023 | -29.20 Mn |
| Dec 31, 2022 | -20.62 Mn |
| Sep 30, 2022 | -20.25 Mn |
| Jun 30, 2022 | -1.65 Mn |
| Mar 31, 2022 | -24.62 Mn |
| Dec 31, 2021 | -6.43 Mn |
| Sep 30, 2021 | -11.79 Mn |
API Access
Castle Biosciences Profit After Tax 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=profit-after-tax&ticker=CSTL&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "profit-after-tax", "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=profit-after-tax&ticker=CSTL&period=max&api_key=YOUR_API_KEY");
const data = await res.json();