89 /100
LOW RISK
Score updated Feb 26, 2026
CSTL
Castle Biosciences, Inc.

DilutionScore™ measures dilution risk across 5 factors. Lower scores indicate higher risk of share dilution.

🔔 Get alerts when CSTL's score changes →
📊 Score Breakdown
📋 Offering Ability
80
💰 Cash Runway
100
📊 Float Risk
90
⚠️ Warrant Exposure
85
🔄Convertible Debt
💹 Market Data
Market Cap$930.53M
Shares Outstanding29.19M
Float24.57M
Cash$287.54M
Debt$37.14M
Short InterestN/A
🏛 Institutional Holdings
171 institutional holders · 29.21M shares
#1 BlackRock, Inc. 3.19M shares
#2 NEW YORK STATE COMMON RETIREMENT FUND 2.56M shares
#3 VANGUARD GROUP INC 2.17M shares
+ 17 more holders Sign up free to view →
📉 Short Interest
Short Interest1.53M
Days to Cover4.0
% of Float6.2%
FINRA data as of Jan 15, 2026
📁 Recent SEC Activity
xbrl XBRL CONVERTIBLE Dec 31, 2020
xbrl XBRL WARRANT Dec 31, 2020
Full SEC filing analysis available with free account
📰 Recent News
Track CSTL Dilution Risk in Real-Time
Get instant alerts when SEC filings impact dilution risk. Free tier available.
Start Tracking CSTL — Free
Real-time SEC alerts DilutionScore™ tracking No credit card required