Quick Answer
CASTLE BIOSCIENCES INC reported Shares Outstanding of 29.69 million shares for fiscal year 2025.
CASTLE BIOSCIENCES INC Shares Outstanding — Annual History
| Fiscal Year | Shares Outstanding | YoY Change |
|---|---|---|
| 2025 | 29.69M | +4.2% |
| 2024 | 28.48M | +3.9% |
| 2023 | 27.41M | +3.2% |
| 2022 | 26.55M | +4.6% |
| 2021 | 25.38M | +2.3% |
| 2020 | 24.81M | +44.8% |
| 2019 | 17.13M | +794.0% |
| 2018 | 1.92M | — |
Quarterly Shares Outstanding
| Quarter Ending | Shares Outstanding | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | 29.16M | +4.2% | +0.6% |
| June 30, 2025 | 28.98M | +4.6% | +0.5% |
| March 31, 2025 | 28.84M | +4.6% | +1.3% |
| December 31, 2024 | 28.48M | +3.9% | +1.8% |
| September 30, 2024 | 27.98M | +4.0% | +1.0% |
| June 30, 2024 | 27.71M | +3.5% | +0.5% |
| March 31, 2024 | 27.59M | +3.4% | +0.6% |
| December 31, 2023 | 27.41M | +3.2% | +1.9% |
- CASTLE BIOSCIENCES INC showed an increase of +4.2% in Shares Outstanding compared to the prior fiscal year.
- Over the 2018–2025 period, CASTLE BIOSCIENCES INC’s shares outstanding has grown by 1449.2% (from 1.92 million shares to 29.69 million shares).
- The most recent figure is from CASTLE BIOSCIENCES INC’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 26, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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