13F Insight
DOSSIER · 13F Holders · Q1 2026Healthcare · Services-Medical LaboratoriesMega-capCrowded
RDNT

RADNET INC

360 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·360 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 9.9%
vs prior quarter
13F value held
$2.5B
52.0% inst. owned
of float
Holders
360
-8 QoQ
filers reporting
Activity
+84 / −22
+910 added · −716 reduced
this quarter
Concentration
22.74%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

360 institutions reported RDNT in Q1 2026. BlackRock, Inc. leads at 22.7% of the visible book. -8 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$561M10.0M0.01%Q1 202602
RTW INVESTMENTS, LP
CIK 0001493215
$239M4.3M2.38%Q1 202603
Vanguard Portfolio Management
CIK 0002100121
$218M3.9M0.01%Q1 202604
BECK MACK & OLIVER LLC
CIK 0000010742
$177M3.2M3.65%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$174M3.1M0.00%Q1 202606
STATE STREET CORP
CIK 0000093751
$148M2.7M0.01%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$96M1.7M0.01%Q1 202608
Invesco Ltd.
CIK 0000914208
$91M1.6M0.01%Q1 202609
Alyeska Investment Group, L.P.
CIK 0001453072
$82M1.2M0.23%Q4 202510
JB CAPITAL PARTNERS LP
CIK 0001138532
$80M1.4M13.71%Q1 202611
Hood River Capital Management LLC
CIK 0001578177
$79M1.4M0.79%Q1 202612
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$77M1.4M0.02%Q1 202613
Clearbridge Investments, LLC
CIK 0001348883
$71M1.3M0.06%Q1 202614
GOLDMAN SACHS GROUP INC
CIK 0000886982
$67M1.2M0.01%Q1 202615
PRINCIPAL FINANCIAL GROUP INC
CIK 0001126328
$62M1.1M0.03%Q1 202616
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$50M902K0.03%Q1 202617
AMERIPRISE FINANCIAL INC
CIK 0000820027
$50M899K0.01%Q1 202618
Allspring Global Investments Holdings, LLC
CIK 0001890906
$48M865K0.08%Q1 202619
Point72 Asset Management, L.P.
CIK 0001603466
$48M855K0.06%Q1 202620
MORGAN STANLEY
CIK 0000895421
$48M850K0.00%Q1 2026
Page 1 of 18
340 more holders available. Log in →