Castle Biosciences (CSTL) FCF Margin (2018 - 2026)
Castle Biosciences (CSTL) posted FCF Margin of 41.33% for Q1 2026, down 167.02% sequentially from 61.66% in Q4 2025, and down 3081.0% YoY from 1.39% in Q1 2025.
Castle Biosciences (CSTL) FCF Margin (2018 - 2026) Analysis & Trends
Castle Biosciences (CSTL) has 9 years of FCF Margin data on file, last reported at 41.33% in Q1 2026.
- Quarterly FCF Margin fell 3081.0% year-over-year to 41.33% in Q1 2026, while the trailing twelve-month figure through Mar 2026 was 10.86% (down 734.0% YoY) and the FY2025 annual result came in at 18.08%, down 145.0% from the prior year.
- FCF Margin fell to 41.33% in Q1 2026 per CSTL's latest filing, from 61.66% in the prior quarter.
- The five-year high for FCF Margin was 61.66% in Q4 2025, with the low at 79.93% in Q1 2022.
- Average FCF Margin over 5 years is 5.32%, with a median of 6.65% recorded in 2023.
- The widest YoY moves for FCF Margin: up 14306 bps in 2022, down 11677 bps in 2022.
- Castle Biosciences' FCF Margin stood at 9.26% in 2022, then soared by 342 bps to 22.37% in 2023, then jumped by 134 bps to 52.28% in 2024, then grew by 18 bps to 61.66% in 2025, then tumbled by 167 bps to 41.33% in 2026.
- Business Quant data shows CSTL's FCF Margin at 41.33% in Q1 2026, 61.66% in Q4 2025, and 0.74% in Q3 2025.
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Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | FCF Margin (Qtr) |
|---|---|---|---|---|---|
| 1 | Waters | 31,055.11 Bn | 31,054.65 Bn | 1.11 Bn | -3.31% |
| 2 | Thermo Fisher Scientific | 191.02 Bn | 187.77 Bn | 7.74 Bn | 7.41% |
| 3 | Danaher | 137.16 Bn | 131.47 Bn | 3.59 Bn | 18.23% |
| 4 | Idexx Laboratories | 42.82 Bn | 42.62 Bn | 722.74 Mn | 22.61% |
| 5 | Natera | 39.09 Bn | 37.99 Bn | 696.04 Mn | 2.59% |
| 6 | Agilent Technologies | 37.61 Bn | 35.81 Bn | 990.00 Mn | 10.95% |
| 7 | Iqvia Holdings | 34.23 Bn | 32.25 Bn | 1.36 Bn | 11.83% |
| 8 | Illumina | 28.14 Bn | 26.98 Bn | 721.00 Mn | 23.01% |
| 9 | Mettler Toledo International | 26.40 Bn | 26.33 Bn | 555.82 Mn | 12.92% |
| 10 | Castle Biosciences | 738.56 Mn | 476.84 Mn | 63.15 Mn | -41.33% |
Historic Data
Download Data| Date | Value |
|---|---|
| Mar 31, 2026 | -41.33% |
| Dec 31, 2025 | 61.66% |
| Sep 30, 2025 | 0.74% |
| Jun 30, 2025 | 19.97% |
| Mar 31, 2025 | -10.52% |
| Dec 31, 2024 | 52.28% |
| Sep 30, 2024 | 19.77% |
| Jun 30, 2024 | 11.86% |
| Mar 31, 2024 | -10.32% |
| Dec 31, 2023 | 22.37% |
| Sep 30, 2023 | -6.65% |
| Jun 30, 2023 | -2.35% |
| Mar 31, 2023 | -68.46% |
| Dec 31, 2022 | -9.26% |
| Sep 30, 2022 | -22.62% |
| Jun 30, 2022 | -27.74% |
| Mar 31, 2022 | -79.93% |
| Dec 31, 2021 | 107.51% |
| Sep 30, 2021 | -26.13% |
| Jun 30, 2021 | -170.81% |