CASTLE BIOSCIENCES INC (CSTL) Institutional Ownership and Insiders Activity
CASTLE BIOSCIENCES INC (CSTL) is widely held by institutional investors, with 182 firms reporting positions valued at approximately $669.80M based on SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is the largest disclosed holder, reporting approximately $78.51M in CSTL holdings in its latest filing.
Recent insider activity includes 50 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.
Institutional Holders
182
Total Reported Value
$669.80M
Largest Holder
Blackrock, Inc.
Largest Position
$78.51M
Insider Transactions (90d)
50
Latest Filing Quarter
Q2 2026
New Institutional Positions
187
Funds Exiting Positions
0
Top Institutional Owners
View allInvestorReported Balance
- Blackrock, Inc.$78.51M
- Rtw Investments, Lp$66.26M
- Principal Financial Group Inc$53.33M
- Vanguard Capital Management Llc$29.25M
- Geode Capital Management, Llc$28.21M
Related CSTL Institutional Insights:
- CSTL 13F Institutional Holders
- CSTL Superinvestors
- CSTL Institutional Ownership Changes
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- CSTL Insider Trading & SEC Form 4 Activity
- CSTL Articles
- Top Institutional Investor Stock Rankings