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CSTL · UNH 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.

CSTLUNH
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
  • UNH
0204060202120222023202420252026
Holders and value by quarter
QuarterCSTLUNH
Q3 20202 holders, $27m37 holders, $71.0bn
Q4 20201 holders, $139m36 holders, $79.4bn
Q1 20212 holders, $179m37 holders, $81.7bn
Q2 20213 holders, $187m43 holders, $86.1bn
Q3 20213 holders, $138m38 holders, $81.3bn
Q4 20213 holders, $73m38 holders, $104bn
Q1 20223 holders, $80m41 holders, $105bn
Q2 20222 holders, $5k33 holders, $107bn
Q3 20221 holders, $6k42 holders, $102bn
Q4 20221 holders, $5k43 holders, $116bn
Q1 20231 holders, $5k51 holders, $90.5bn
Q2 2023none listed holders, n.a.43 holders, $88.3bn
Q3 2023none listed holders, n.a.43 holders, $91.0bn
Q4 2023none listed holders, n.a.42 holders, $92.5bn
Q1 20241 holders, $4.7m44 holders, $82.5bn
Q2 20241 holders, $6.1m43 holders, $87.4bn
Q3 20243 holders, $12m37 holders, $95.7bn
Q4 20241 holders, $11m45 holders, $79.2bn
Q1 20251 holders, $14m49 holders, $81.5bn
Q2 20251 holders, $11m50 holders, $44.5bn
Q3 20251 holders, $10m42 holders, $44.3bn
Q4 20252 holders, $16m41 holders, $42.6bn
Q1 20261 holders, $12m44 holders, $38.0bn
Q2 20261 holders, $22m43 holders, $62.3bn
CSTL

Castle Biosciences Inc

Holders
1
Reported value
$11m
Buyers
0
Sellers
1

Breadth -1 among 95 comparable managers.

Health care services and research
UNH

Unitedhealth Group Inc

Holders
50
Reported value
$44.5bn
Buyers
30
Sellers
22

Breadth +8 among 95 comparable managers.

Health care services and researchManaged care

Who holds both, Q2 2025

Among the 50 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only CSTL (0)

None.

Only UNH (49)

AllianceBernstein LP, Appaloosa LP, AQR Capital Management LLC, Arrowstreet Capital LP, Baillie Gifford & Co, Berkshire Hathaway Inc, Brevan Howard Capital Management LP, Capital Research Global Investors, Capital World Investors, Citadel Advisors LLC, D. E. Shaw & Co., Discovery Capital Management LLC, Dodge & Cox, Eisler Capital Management Ltd, Farallon Capital Management LLC, Fidelity (FMR LLC), First Eagle Investment Management LLC, Hudson Bay Capital Management LP, Invesco Ltd, Jane Street Group LLC, Janus Henderson Group Ltd, Lone Pine Capital LLC, Man Group PLC, Markel Group Inc, Marshall Wace LLP, and 24 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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