Castle Biosciences (CSTL) Net Cash Flow (2018 - 2026)
Castle Biosciences' (CSTL) quarterly Net Cash Flow came in at -$1.6 million in Q2 2026, up 77.9% year-over-year from -$926378.8 in Q2 2025, and up 96.89% quarter-over-quarter from -$53.0 million in Q1 2026.
Powered by 
Analysis
Castle Biosciences (CSTL) Net Cash Flow (2018 - 2026) Analysis & Trends
Castle Biosciences has disclosed Net Cash Flow across 9 years of filings, most recently posting -$1.6 million for Q2 2026.
- In Q2 2026, Net Cash Flow rose 77.9% year-over-year to -$1.6 million; the TTM figure through Jun 2026 stood at -$20.1 million (down 502.49% YoY), while the FY2025 annual figure was -$3.0 million, down 114.28% from the prior year.
- Net Cash Flow came in at -$1.6 million for Q2 2026 at Castle Biosciences, up from -$53.0 million in the prior quarter.
- In the past five years, Net Cash Flow ranged from a high of $31.2 million in Q4 2025 to a low of -$139.0 million in Q3 2022.
- Average Net Cash Flow over 5 years is -$14.9 million, with a median of -$7.8 million recorded in 2023.
- Year-over-year, Net Cash Flow sank 2592.48% in 2022 and soared 301.83% in 2024.
- Over 5 years, Net Cash Flow stood at -$11.2 million in 2022, then soared by 167.82% to $7.6 million in 2023, then soared by 224.89% to $24.8 million in 2024, then advanced by 25.95% to $31.2 million in 2025, then slumped by 105.29% to -$1.6 million in 2026.
- Per Business Quant data, the three most recent Net Cash Flow figures were -$1.6 million in Q2 2026, -$53.0 million in Q1 2026, and $31.2 million in Q4 2025.
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Net Cash Flow (Qtr) |
|---|---|---|---|---|---|
| 1 | Natera | 53.05 Bn | 51.95 Bn | 486.15 Mn | 3.57 Mn |
| 2 | Quest Diagnostics | 27.19 Bn | 26.87 Bn | 1.03 Bn | 234.00 Mn |
| 3 | Labcorp Holdings | 25.93 Bn | 25.81 Bn | 1.11 Bn | -840.60 Mn |
| 4 | Guardant Health | 23.97 Bn | 22.91 Bn | 219.03 Mn | 66.71 Mn |
| 5 | Tempus AI | 13.64 Bn | 12.82 Bn | 274.25 Mn | 78.50 Mn |
| 6 | Caris Life Sciences | 8.47 Bn | 7.68 Bn | 182.38 Mn | -130.62 Mn |
| 7 | Sotera Health | 5.35 Bn | 4.99 Bn | 177.96 Mn | 42.79 Mn |
| 8 | BillionToOne | 4.96 Bn | 4.41 Bn | 77.11 Mn | 11.18 Mn |
| 9 | Adaptive Biotechnologies | 4.55 Bn | 4.21 Bn | 51.39 Mn | 92.31 Mn |
| 10 | Castle Biosciences | 1.08 Bn | 811.36 Mn | 79.85 Mn | -1.65 Mn |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | -1.65 Mn |
| Mar 31, 2026 | -52.97 Mn |
| Dec 31, 2025 | 31.17 Mn |
| Sep 30, 2025 | 3.32 Mn |
| Jun 30, 2025 | -7.46 Mn |
| Mar 31, 2025 | -30.02 Mn |
| Dec 31, 2024 | 24.75 Mn |
| Sep 30, 2024 | 9.39 Mn |
| Jun 30, 2024 | 2.62 Mn |
| Mar 31, 2024 | -15.89 Mn |
| Dec 31, 2023 | 7.62 Mn |
| Sep 30, 2023 | -4.65 Mn |
| Jun 30, 2023 | -18.95 Mn |
| Mar 31, 2023 | -8.13 Mn |
| Dec 31, 2022 | -11.23 Mn |
| Sep 30, 2022 | -138.99 Mn |
| Jun 30, 2022 | -35.85 Mn |
| Mar 31, 2022 | -20.62 Mn |
| Dec 31, 2021 | -33.54 Mn |
| Sep 30, 2021 | -5.16 Mn |
API Access
Castle Biosciences Net Cash Flow 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=net-cash-flow&ticker=CSTL&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "net-cash-flow", "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=net-cash-flow&ticker=CSTL&period=max&api_key=YOUR_API_KEY");
const data = await res.json();