PRNewswire (Fri, 27-Mar 9:05 AM ET)
Globe Newswire (Fri, 13-Mar 11:02 AM ET)
Globe Newswire (Mon, 9-Mar 7:00 AM ET)
Globe Newswire (Wed, 4-Mar 4:30 PM ET)
Castle Biosciences Announces Grand Opening of New Corporate Headquarters in Friendswood, Texas
Globe Newswire (Tue, 3-Mar 4:30 PM ET)
Castle Biosciences Reports Fourth Quarter and Full-Year 2025 Results
Globe Newswire (Thu, 26-Feb 4:05 PM ET)
Globe Newswire (Thu, 19-Feb 5:46 PM ET)
Globe Newswire (Thu, 5-Feb 7:00 AM ET)
Castle Biosciences Announces Preliminary Unaudited Fourth Quarter and Full-Year 2025 Results
Globe Newswire (Sun, 11-Jan 4:00 PM ET)
Market Chameleon (Mon, 22-Dec 6:15 AM ET)
Castle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. The company derives revenues through the delivery of test reports for its molecular diagnostic tests.
Castle Biosciences trades on the NASDAQ stock market under the symbol CSTL.
As of April 6, 2026, CSTL stock price climbed to $25.00 with 31,862 million shares trading.
CSTL has a beta of 0.66, meaning it tends to be less sensitive to market movements. CSTL has a correlation of 0.04 to the broad based SPY ETF.
CSTL has a market cap of $721.12 million. This is considered a Small Cap stock.
Last quarter Castle Biosciences reported $87 million in Revenue and -$.08 earnings per share. This beat revenue expectation by $7 million and exceeded earnings estimates by $.16.
In the last 3 years, CSTL traded as high as $44.28 and as low as $9.26.
The top ETF exchange traded funds that CSTL belongs to (by Net Assets): VTI, IWM, VXF, IWN, IBB.
CSTL has outperformed the market in the last year with a return of +23.8%, while the SPY ETF gained +17.8%. However, in the most recent history, CSTL shares have underperformed the stock market with its stock returning -35.1% in the last 3 month period and -2.7% for the last 2 week period, while SPY has returned -3.5% and +0.2%, respectively.
CSTL support price is $24.13 and resistance is $25.55 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that CSTL shares will trade within this expected range on the day.
