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CSTL · CI in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

CSTLCI
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • CSTL
  • CI
010203040202120222023202420252026
Holders and value by quarter
QuarterCSTLCI
Q3 20202 holders, $27m34 holders, $18.1bn
Q4 20201 holders, $139m22 holders, $21.9bn
Q1 20212 holders, $179m24 holders, $23.9bn
Q2 20213 holders, $187m31 holders, $22.5bn
Q3 20213 holders, $138m30 holders, $17.8bn
Q4 20213 holders, $73m26 holders, $20.1bn
Q1 20223 holders, $80m28 holders, $20.4bn
Q2 20222 holders, $5k32 holders, $22.1bn
Q3 20221 holders, $6k31 holders, $21.5bn
Q4 20221 holders, $5k30 holders, $24.7bn
Q1 20231 holders, $5k35 holders, $18.2bn
Q2 2023none listed holders, n.a.30 holders, $19.8bn
Q3 2023none listed holders, n.a.28 holders, $19.8bn
Q4 2023none listed holders, n.a.31 holders, $20.6bn
Q1 20241 holders, $4.7m28 holders, $24.0bn
Q2 20241 holders, $6.1m28 holders, $19.5bn
Q3 20243 holders, $12m25 holders, $20.2bn
Q4 20241 holders, $11m23 holders, $15.2bn
Q1 20251 holders, $14m24 holders, $18.4bn
Q2 20251 holders, $11m34 holders, $19.5bn
Q3 20251 holders, $10m28 holders, $16.2bn
Q4 20252 holders, $16m21 holders, $14.6bn
Q1 20261 holders, $12m26 holders, $13.5bn
Q2 20261 holders, $22m28 holders, $13.0bn
CSTL

Castle Biosciences Inc

Holders
0
Reported value
$0
Buyers
n.a.
Sellers
n.a.

No cross-section for this quarter.

Health care services and research
CI

The Cigna Group

Holders
31
Reported value
$20.6bn
Buyers
16
Sellers
19

Breadth -3 among 93 comparable managers.

Health care services and researchManaged care

Who holds both, Q4 2023

Among the 31 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Both (0)

No tracked manager lists every one of them.

Only CSTL (0)

None.

Only CI (31)

Acadian Asset Management LLC, AllianceBernstein LP, AQR Capital Management LLC, Arrowstreet Capital LP, Artisan Partners LP, Balyasny Asset Management LLC, Bridgewater Associates LP, Capital World Investors, Citadel Advisors LLC, D. E. Shaw & Co., Dodge & Cox, ExodusPoint Capital Management LP, Fidelity (FMR LLC), GAMCO Investors Inc, Glenview Capital Management LLC, Invesco Ltd, Man Group PLC, Marshall Wace LLP, MFS Investment Management, Millennium Management LLC, Neuberger Berman Group LLC, Quantbot Technologies LP, Renaissance Technologies LLC, Soros Fund Management LLC, Squarepoint Ops LLC, and 6 more

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. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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