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CSTL in the 13F filings

Castle Biosciences Inc · CUSIP 14843C105

Sector · Health care services and research
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q1 2023
Quarter end
31 Mar 2023
the date the book describes
Filed
3 May 2023
up to 45 days after the quarter end
Managers listing it
1
at least, of 95 tracked, among listed positions
Comparable managers
93
filed both Q4 2022 and Q1 2023; 1 listed it in both
Shares listed
225
combined, among listed positions
Reported value
$5k
combined, at the quarter end

Managers listing CSTL in Q1 2023

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2022, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

1 of 1 holder

ActionFiling
Baillie Gifford & Co225$5kunder 0.1%Held03 May 2023 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2022 to Q1 2023, among managers that listed it in both quarters or opened it.

Increases

No increase among listed positions.

Reductions

No reduction among listed positions.

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (0)

No new position among listed positions.

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q3 2024 to 1 in Q2 2026

Tracked managers listing it, at least.

01232020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CSTL by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20191$3.0mn.a.n.a.
Q4 20191$7.1mn.a.n.a.
Q1 20201$6.6mn.a.n.a.
Q2 20201$18mn.a.n.a.
Q3 20202$27mn.a.n.a.
Q4 20201$139mn.a.n.a.
Q1 20212$179mn.a.n.a.
Q2 20213$187mn.a.n.a.
Q3 20213$138mn.a.n.a.
Q4 20213$73mn.a.n.a.
Q1 20223$80mn.a.n.a.
Q2 20222$5kn.a.n.a.
Q3 20221$6kn.a.n.a.
Q4 20221$5kn.a.n.a.
Q1 20231$5kn.a.n.a.
Q1 20241$4.7m10
Q2 20241$6.1m10
Q3 20243$12m30
Q4 20241$11m11
Q1 20251$14m10
Q2 20251$11m01
Q3 20251$10m01
Q4 20252$16m188
Q1 20261$12m168
Q2 20261$22m1111

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

CSTL and UNH →CSTL and ELV →CSTL and CI →Choose a stock to compare with CSTL →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own CSTL, latest filings →Back to the 13F Explorer →