CASTLE BIOSCIENCES INC (CSTL) Institutional Ownership

CSTL is currently held by 1 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $13.08M based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026.

The largest disclosed holder is Renaissance Technologies LLC, which reported ownership valued at approximately $13.08M in its March 31, 2026 13F filing. Based on current market prices and the latest disclosed share count, Renaissance Technologies LLC's CSTL position is now estimated to be worth approximately $10.79M, representing an estimated loss of -17.52% since the filing period.

Major shareholders tracked on this page include Renaissance Technologies LLC, and other prominent asset managers. Collectively, these investors account for approximately 100% of the total disclosed value among the investors covered in this analysis.

This page tracks institutional ownership trends, hedge fund exposure, portfolio concentration, historical 13F filings, and estimated holding performance to help investors analyze smart money sentiment toward CASTLE BIOSCIENCES INC (CSTL).

Institutional Ownership Trend

Portfolio quarterInstitutional holdersTotal reported valueTotal shares
Q1 20261$13,080,240532,800
Q4 20251$19,181,590493,100
Q3 20251$12,810,402562,600
Q2 20251$13,691,610670,500
Q1 20251$14,038,024701,200
Q4 20241$18,255,250685,000
Q3 20241$13,962,308489,562
Q2 20241$6,563,655301,500
Q1 20241$4,534204,700
Q4 20231$2,426112,400
Q3 20231$1,804106,800
Q2 20231$2,365172,400

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