Castle Biosciences Inc
corporate_fare Company Profile
Castle Biosciences Inc (NASDAQ:CSTL) is a publicly traded company in the Industrial Applications And Services sector. Wiseek has independently scored 10 items for CSTL at importance 7 or higher on its 1–10 market-impact scale. Its most recent item scored 7 or higher is dated 2026-07-31, rated 7/10. Across its 10 most recent items scored 7 or higher, the top rating is 8/10, with 6 rated 8 or above. Recent SEC coverage for CSTL spans 10-Q, 8-K, DEF 14A, 10-K.
Recent high-impact activity:
- Castle Biosciences' AdvanceAD-Tx Shows 97.8% Concordance in Atopic Dermatitis Study
- Castle Biosciences Crushes Q2 Revenue, Lifts 2026 Outlook
- Q2 2026 Revenue Surges 20.1%, YTD Net Loss Narrows, Liquidity Strong Amidst Raised Guidance
- Castle Biosciences Smashes Q2 Revenue, Lifts 2026 Guidance to $365–375M
- Castle Biosciences Reports Improved Q1 Net Loss and Strong Test Volume Growth
Financial Snapshot
Short Interest & Short Volume
7.36 days to coverFINRA reported short interest of 1,899,369 shares in CSTL as of the September 15, 2026 settlement, a 3.9% decrease from the prior period — about 7.4 days to cover at its recent average daily volume. On October 2, 2026, 67.5% of CSTL volume reported to FINRA trade-reporting facilities was marked short.
Daily short sale volume covers trades reported to FINRA trade-reporting facilities and is not the same as short interest (bi-monthly reported positions). Source: FINRA — FINRA is the owner and source of this short interest and short sale volume data; it may not be redistributed.