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RDNT · 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.

RDNTUNH
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.
  • RDNT
  • UNH
0204060202120222023202420252026
Holders and value by quarter
QuarterRDNTUNH
Q3 20201 holders, $803k37 holders, $71.0bn
Q4 20201 holders, $876k36 holders, $79.4bn
Q1 20212 holders, $8.9m37 holders, $81.7bn
Q2 20214 holders, $57m43 holders, $86.1bn
Q3 20214 holders, $51m38 holders, $81.3bn
Q4 20214 holders, $19m38 holders, $104bn
Q1 20223 holders, $23m41 holders, $105bn
Q2 20223 holders, $31m33 holders, $107bn
Q3 20223 holders, $44m42 holders, $102bn
Q4 20222 holders, $11m43 holders, $116bn
Q1 20233 holders, $28m51 holders, $90.5bn
Q2 20233 holders, $97m43 holders, $88.3bn
Q3 20234 holders, $66m43 holders, $91.0bn
Q4 20233 holders, $34m42 holders, $92.5bn
Q1 20242 holders, $14m44 holders, $82.5bn
Q2 20243 holders, $14m43 holders, $87.4bn
Q3 20243 holders, $99m37 holders, $95.7bn
Q4 20243 holders, $92m45 holders, $79.2bn
Q1 20252 holders, $20m49 holders, $81.5bn
Q2 20253 holders, $36m50 holders, $44.5bn
Q3 20253 holders, $41m42 holders, $44.3bn
Q4 20254 holders, $253m41 holders, $42.6bn
Q1 20266 holders, $337m44 holders, $38.0bn
Q2 20264 holders, $302m43 holders, $62.3bn
RDNT

Radnet Inc

Holders
6
Reported value
$337m
Buyers
16
Sellers
9

Breadth +7 among 91 comparable managers.

Health care services and research
UNH

Unitedhealth Group Inc

Holders
44
Reported value
$38.0bn
Buyers
30
Sellers
24

Breadth +6 among 91 comparable managers.

Health care services and researchManaged care

Who holds both, Q1 2026

Among the 45 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only RDNT (1)

Holocene Advisors LP

Only UNH (39)

Acadian Asset Management LLC, AllianceBernstein LP, Appaloosa LP, AQR Capital Management LLC, Arrowstreet Capital LP, Baillie Gifford & Co, Balyasny Asset Management LLC, Brevan Howard Capital Management LP, Capital Research Global Investors, Capital World Investors, Caxton Associates LLP, Citadel Advisors LLC, D. E. Shaw & Co., Davidson Kempner Capital Management LP, Dodge & Cox, ExodusPoint Capital Management LP, Farallon Capital Management LLC, Fidelity (FMR LLC), Hudson Bay Capital Management LP, Invesco Ltd, Jane Street Group LLC, Janus Henderson Group Ltd, Markel Group Inc, Marshall Wace LLP, Millennium Management LLC, and 14 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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