Castle Biosciences, Inc.
US ˙ NasdaqGM ˙ US14843C1053

SecurityCSTL / Castle Biosciences, Inc.
InstitutionFirst Horizon Advisors, Inc.
Latest Disclosed Ownership1,792 shares
Latest Disclosed Value $ 36,592
First Horizon Advisors, Inc. reports 0.99% decrease in ownership of CSTL / Castle Biosciences, Inc.

On August 6, 2025 - First Horizon Advisors, Inc. filed a 13F-HR form disclosing ownership of 1,792 shares of Castle Biosciences, Inc. (US:CSTL) valued at $36,593 USD as of June 30, 2025. The entity filed a previous 13F-HR on April 28, 2025 disclosing 1,810 shares of Castle Biosciences, Inc.. This represents a change in shares of -0.99% during the quarter. The current value of the position is $38,707 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2025-08-06 2025-06-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 1,792 -18 -0.99 37 0.00 0.0010
2025-04-28 2025-03-31 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 1,810 -200 -9.95 36 -32.08 0.0010
2025-02-03 2024-12-31 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 2,010 -60 -2.90 54 -10.17 0.0015
2024-11-08 2024-09-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 2,070 -5,783 -73.64 59 -65.29 0.0016
2024-07-19 2024-06-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 7,853 0 0.00 171 -1.73 0.0052
2024-04-26 2024-03-31 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 7,853 0 0.00 174 2.37 0.0054
2024-02-06 2023-12-31 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 7,853 -250 -3.09 169 24.26 0.0056
2023-10-27 2023-09-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 8,103 672 9.04 137 34.65 0.0050
2023-08-03 2023-06-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 7,431 442 6.32 102 -36.08 0.0035
2023-05-15 2023-03-31 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 6,989 18 0.26 159 -3.66 0.0057
2023-02-10 2022-12-31 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 6,971 -257 -3.56 164 -12.77 0.0060
2022-11-09 2022-09-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 7,228 6,682 1,223.81 188 1,609.09 0.0075
2022-08-02 2022-06-30 13F CASTLE BIOSCIENCES INC COM COMMON STOCK 14843C105 546 -52 -8.70 11 -59.26 0.0004
2022-05-10 2022-03-31 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 598 138 30.00 27 42.11 0.0011
2022-02-09 2021-12-31 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 460 -101 -18.00 19 -48.65 0.0006
2021-11-15 2021-09-30 13F/A-1 CASTLE BIOSCIENCES COMMON STOCK 14843C105 561 179 46.86 37 32.14 0.0012
2021-11-09 2021-09-30 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 999 617 57 0.0008
2021-08-09 2021-06-30 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 382 111 40.96 28 55.56 0.0015
2021-05-11 2021-03-31 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 271 -61 -18.37 18 -18.18 0.0010
2021-02-11 2020-12-31 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 332 149 81.42 22 144.44 0.0015
2020-11-12 2020-09-30 13F CASTLE BIOSCIENCES COMMON STOCK 14843C105 183 183 9 0.0007
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.