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

QUEST DIAGNOSTICS INC

1,107 institutions still hold QUEST DIAGNOSTICS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 74834L100·Services-Medical Laboratories·1,107 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$11.8B
visible holders
Holders
1,107
filers reporting
Concentration
15.24%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

1,107 institutions reported DGX in Q1 2026. BlackRock, Inc. leads at 15.2% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$1.8B9.2M0.03%Q1 202602
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1.4B7.1M0.03%Q1 202603
Vanguard Portfolio Management
CIK 0002100121· Index
$1.2B6.1M0.06%Q1 202604
STATE STREET CORP
CIK 0000093751
$1.1B5.4M0.04%Q1 202605
Boston Partners
CIK 0001386060
$787M4.0M0.82%Q1 202606
JPMORGAN CHASE & CO
CIK 0000019617
$758M3.8M0.05%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$603M3.1M0.04%Q1 202608
MORGAN STANLEY
CIK 0000895421
$486M2.5M0.03%Q1 202609
EdgePoint Investment Group Inc.
CIK 0001481669
$440M2.2M3.52%Q1 202610
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$382M1.9M0.08%Q1 202611
Grantham, Mayo, Van Otterloo & Co. LLC
CIK 0001352662
$369M1.9M0.94%Q1 202612
VICTORY CAPITAL MANAGEMENT INC
CIK 0001040188
$362M1.8M0.23%Q1 202613
WELLS FARGO & COMPANY/MN
CIK 0000072971
$345M1.8M0.07%Q1 202614
BANK OF AMERICA CORP /DE/
CIK 0000070858
$344M1.8M0.03%Q1 202615
Invesco Ltd.
CIK 0000914208
$321M1.6M0.05%Q1 202616
DAVIS SELECTED ADVISERS
CIK 0001036325
$317M1.6M1.46%Q1 202617
GOLDMAN SACHS GROUP INC
CIK 0000886982
$264M1.3M0.03%Q1 202618
NORTHERN TRUST CORP
CIK 0000073124· Index
$218M1.1M0.03%Q1 202619
FMR LLC
CIK 0000315066
$185M942K0.01%Q1 202620
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$170M867K0.09%Q1 2026
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