DOSSIER · 13F Holders · Q2 2026Healthcare · Services-Medical Laboratories
DGX

QUEST DIAGNOSTICS INC

1,163 institutions still hold QUEST DIAGNOSTICS INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 74834L100·Services-Medical Laboratories·1,163 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$14.0B
visible holders
Holders
1,163
filers reporting
Concentration
14.08%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

1,163 institutions reported DGX in Q2 2026. BlackRock, Inc. leads at 14.1% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$2.0B9.3M0.03%Q2 2026
02
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1.5B7.2M0.03%Q2 2026
03
Vanguard Portfolio Management
CIK 0002100121· Index
$1.3B6.1M0.06%Q2 2026
04
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$1.2B6.3M0.14%Q1 2026
05
STATE STREET CORP
CIK 0000093751
$1.2B5.5M0.03%Q2 2026
06
Boston Partners
CIK 0001386060
$1.0B4.7M0.89%Q2 2026
07
JPMORGAN CHASE & CO
CIK 0000019617
$749M3.5M0.04%Q2 2026
08
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$663M3.1M0.04%Q2 2026
09
MORGAN STANLEY
CIK 0000895421
$522M2.5M0.03%Q2 2026
10
EdgePoint Investment Group Inc.
CIK 0001481669
$440M2.2M3.52%Q1 2026
11
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$421M2.0M0.08%Q2 2026
12
BANK OF AMERICA CORP /DE/
CIK 0000070858
$410M1.9M0.03%Q2 2026
13
Grantham, Mayo, Van Otterloo & Co. LLC
CIK 0001352662
$400M1.9M0.90%Q2 2026
14
WELLS FARGO & COMPANY/MN
CIK 0000072971
$371M1.8M0.06%Q2 2026
15
DAVIS SELECTED ADVISERS
CIK 0001036325
$330M1.6M1.42%Q2 2026
16
VICTORY CAPITAL MANAGEMENT INC
CIK 0001040188
$329M1.6M0.18%Q2 2026
17
NORGES BANK
CIK 0001374170· Sovereign
$298M1.4M0.03%Q2 2026
18
FMR LLC
CIK 0000315066
$296M1.4M0.01%Q2 2026
19
Invesco Ltd.
CIK 0000914208
$292M1.4M0.02%Q2 2026
20
NORTHERN TRUST CORP
CIK 0000073124· Index
$239M1.1M0.03%Q2 2026
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Insiders at QUEST DIAGNOSTICS INC
Delaney Mark ELassiter Wright IiiSamad SamMain Timothy LPlewman PatrickGregg Vicky BCarter Robert BKuppusamy Karthik