Castle Biosciences (CSTL) Free Cash Flow (2018 - 2026)

Castle Biosciences' (CSTL) quarterly Free Cash Flow came in at -$34.6 million in Q1 2026, down 273.76% year-on-year from $19.9 million in Q1 2025, and down 164.46% quarter-over-quarter from $53.7 million in Q4 2025.

Castle Biosciences (CSTL) Free Cash Flow (2018 - 2026) Analysis & Trends

Castle Biosciences has disclosed Free Cash Flow across 9 years of filings, most recently posting -$34.6 million for Q1 2026.

  • Free Cash Flow for Q1 2026 came in at -$34.6 million, down 273.76% year-over-year; the trailing twelve-month figure through Mar 2026 was $36.9 million (down 41.56% YoY), and the FY2025 annual result was $62.2 million, down 4.06% from the prior year.
  • Free Cash Flow came in at -$34.6 million for Q1 2026 at Castle Biosciences, down from $53.7 million in the prior quarter.
  • In the past five years, Free Cash Flow ranged from a high of $53.7 million in Q4 2025 to a low of -$34.6 million in Q1 2026.
  • The 5-year median for Free Cash Flow is -$3.6 million (2022), against an average of $1.8 million.
  • Across the five-year window, Free Cash Flow plunged 389.89% in 2022 and soared 977.21% in 2024, its largest moves.
  • Castle Biosciences' Free Cash Flow stood at -$3.6 million in 2022, then surged by 516.62% to $14.8 million in 2023, then soared by 205.02% to $45.1 million in 2024, then grew by 18.9% to $53.7 million in 2025, then tumbled by 164.46% to -$34.6 million in 2026.
  • The last three Free Cash Flow figures came in at -$34.6 million (Q1 2026), $53.7 million (Q4 2025), and $616000.0 (Q3 2025), per Business Quant data.

Peer Comparison

# Company Market Cap Enterprise Value Gross Profit (Qtr) Free Cash Flow (Qtr)
1 Waters 30,529.42 Bn 30,528.96 Bn 1.11 Bn -42.00 Mn
2 Thermo Fisher Scientific 183.75 Bn 180.50 Bn 7.74 Bn 816.00 Mn
3 Danaher 133.13 Bn 127.43 Bn 3.59 Bn 1.09 Bn
4 Idexx Laboratories 46.14 Bn 45.94 Bn 722.74 Mn 257.97 Mn
5 Agilent Technologies 38.20 Bn 36.39 Bn 990.00 Mn 201.00 Mn
6 Natera 31.50 Bn 30.40 Bn 696.04 Mn 18.03 Mn
7 Iqvia Holdings 31.34 Bn 29.36 Bn 1.36 Bn 491.00 Mn
8 Illumina 24.51 Bn 23.36 Bn 721.00 Mn 251.00 Mn
9 Mettler Toledo International 23.53 Bn 23.47 Bn 555.82 Mn 122.38 Mn
10 Castle Biosciences 629.76 Mn 368.04 Mn 63.15 Mn -34.58 Mn

Historic Data

Download Data
DateValue
Mar 31, 2026 -34.58 Mn
Mar 31, 2026 -34.58 Mn
Dec 31, 2025 53.65 Mn
Dec 31, 2025 53.65 Mn
Sep 30, 2025 616,000.00
Sep 30, 2025 616,000.00
Jun 30, 2025 17.22 Mn
Jun 30, 2025 17.22 Mn
Mar 31, 2025 -9.25 Mn
Mar 31, 2025 -9.25 Mn
Dec 31, 2024 45.12 Mn
Dec 31, 2024 45.12 Mn
Sep 30, 2024 16.96 Mn
Sep 30, 2024 16.96 Mn
Jun 30, 2024 10.32 Mn
Jun 30, 2024 10.32 Mn
Mar 31, 2024 -7.53 Mn
Mar 31, 2024 -7.53 Mn
Dec 31, 2023 14.79 Mn
Dec 31, 2023 14.79 Mn