DOSSIER · 13F Holders · Q1 2026Healthcare · Services-Medical Laboratories
RDNT

RADNET INC

357 institutions still hold RADNET INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 750491102·Services-Medical Laboratories·357 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$2.7B
visible holders
Holders
357
filers reporting
Concentration
20.63%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

357 institutions reported RDNT in Q1 2026. BlackRock, Inc. leads at 20.6% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$561M10.0M0.01%Q1 2026
02
RTW INVESTMENTS, LP
CIK 0001493215
$239M4.3M2.38%Q1 2026
03
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$232M4.2M0.03%Q1 2026
04
Vanguard Portfolio Management
CIK 0002100121· Index
$218M3.9M0.01%Q1 2026
05
BECK MACK & OLIVER LLC
CIK 0000010742
$177M3.2M3.65%Q1 2026
06
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$174M3.1M0.00%Q1 2026
07
STATE STREET CORP
CIK 0000093751
$148M2.7M0.01%Q1 2026
08
Van Berkom & Associates Inc.
CIK 0001524408
$115M2.1M1.88%Q1 2026
09
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$96M1.7M0.01%Q1 2026
10
Invesco Ltd.
CIK 0000914208
$91M1.6M0.01%Q1 2026
11
Alyeska Investment Group, L.P.
CIK 0001453072
$82M1.2M0.23%Q4 2025
12
JB CAPITAL PARTNERS LP
CIK 0001138532
$80M1.4M13.71%Q1 2026
13
Hood River Capital Management LLC
CIK 0001578177
$79M1.4M0.79%Q1 2026
14
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$77M1.4M0.02%Q1 2026
15
Clearbridge Investments, LLC
CIK 0001348883
$71M1.3M0.06%Q1 2026
16
GOLDMAN SACHS GROUP INC
CIK 0000886982
$67M1.2M0.01%Q1 2026
17
PRINCIPAL FINANCIAL GROUP INC
CIK 0001126328
$62M1.1M0.03%Q1 2026
18
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$50M902K0.03%Q1 2026
19
AMERIPRISE FINANCIAL INC
CIK 0000820027
$50M899K0.01%Q1 2026
20
Allspring Global Investments Holdings, LLC
CIK 0001890906
$48M865K0.08%Q1 2026
Page 1 of 18
337 more holders available. Log in →
Insiders at RADNET INC
Berger Howard GWesdorp CornelisLevitt Lawrence LJacobs Laura PastreSwartz David LSpurlock Gregory E.Sorensen Alma GregoryKatz David Jeffrey