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

Castle Biosciences (CSTL) posted Free Cash Flow of $6.6 million for Q2 2026, up 118.94% sequentially from -$34.6 million in Q1 2026, and down 43.32% YoY from $11.6 million in Q2 2025.

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

Castle Biosciences has reported Free Cash Flow for 9 years, with the latest figure at $6.6 million in Q2 2026.

  • Quarterly Free Cash Flow fell 43.32% year-over-year to $6.6 million in Q2 2026, while the trailing twelve-month figure through Jun 2026 was -$489000.0 (down 101.42% YoY) and the FY2025 annual result came in at $28.3 million, down 22.48% from the prior year.
  • Free Cash Flow rose to $6.6 million in Q2 2026 per CSTL's latest filing, from -$34.6 million in the prior quarter.
  • Over five years, Free Cash Flow peaked at $19.7 million in Q4 2025 and troughed at -$34.6 million in Q1 2026.
  • A 5-year average of -$1.7 million and a median of -$2.4 million in 2022 frame the typical range for Free Cash Flow.
  • The sharpest annual moves came in 2022 and 2024: Free Cash Flow sank 398.33% in 2022, then jumped 563.28% in 2024.
  • Over 5 years, Free Cash Flow stood at -$7.8 million in 2022, then surged by 289.98% to $14.8 million in 2023, then grew by 13.55% to $16.8 million in 2024, then climbed by 17.56% to $19.7 million in 2025, then slumped by 66.83% to $6.6 million in 2026.
  • According to Business Quant data, Free Cash Flow over the past three periods registered $6.6 million, -$34.6 million, and $19.7 million for Q2 2026, Q1 2026, and Q4 2025 respectively.

Peer Comparison

# Company Market Cap Enterprise Value Gross Profit (Qtr) Free Cash Flow (Qtr)
1 Thermo Fisher Scientific 213.88 Bn 209.81 Bn 8.34 Bn 1.68 Bn
2 Danaher 140.65 Bn 136.30 Bn 3.61 Bn 1.27 Bn
3 Idexx Laboratories 46.02 Bn 45.83 Bn 779.09 Mn 322.52 Mn
4 Agilent Technologies 39.85 Bn 38.05 Bn 990.00 Mn 201.00 Mn
5 Iqvia Holdings 39.20 Bn 37.12 Bn 1.44 Bn 360.00 Mn
6 Natera 38.80 Bn 37.70 Bn 696.04 Mn 18.03 Mn
7 Illumina 30.11 Bn 28.94 Bn 770.00 Mn 161.00 Mn
8 Mettler Toledo International 28.66 Bn 28.61 Bn 650.22 Mn 282.62 Mn
9 Quest Diagnostics 26.24 Bn 25.61 Bn 1.03 Bn 459.00 Mn
10 Castle Biosciences 926.56 Mn 659.75 Mn 79.85 Mn 6.55 Mn

Historic Data

Download Data
DateValue
Jun 30, 2026 6.55 Mn
Jun 30, 2026 6.55 Mn
Mar 31, 2026 -26.23 Mn
Mar 31, 2026 -26.23 Mn
Dec 31, 2025 44.43 Mn
Dec 31, 2025 44.43 Mn
Sep 30, 2025 616,000.00
Sep 30, 2025 616,000.00
Jun 30, 2025 18.74 Mn
Jun 30, 2025 18.74 Mn
Mar 31, 2025 -10.78 Mn
Mar 31, 2025 -10.78 Mn
Dec 31, 2024 23.70 Mn
Dec 31, 2024 23.70 Mn
Sep 30, 2024 36.15 Mn
Sep 30, 2024 36.15 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