13F Insight
DOSSIER · 13F Holders · Q1 2026Healthcare · Drug Manufacturers - GeneralMega-capCrowded
MRK

MERCK & CO INC

3,933 institutions still hold MERCK & CO INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 58933Y105·Drug Manufacturers - General·3,933 13F holders·last filed Mar 31, 2026
Market cap
$260.0B
▲ 4.5%
vs prior quarter
13F value held
$136.1B
63.0% inst. owned
of float
Holders
3,933
-117 QoQ
filers reporting
Activity
+13 / −62
+984 added · −866 reduced
this quarter
Concentration
19.97%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

3,933 institutions reported MRK in Q1 2026. BlackRock, Inc. leads at 20.0% of the visible book. -117 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
$27.2B225.9M0.47%Q1 202602
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119
$19.4B161.0M0.48%Q1 202603
STATE STREET CORP
CIK 0000093751
$14.5B119.3M0.50%Q1 202604
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$10.1B84.3M1.89%Q1 202605
Vanguard Portfolio Management
CIK 0002100121
$8.1B67.3M0.42%Q1 202606
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$7.1B59.6M0.44%Q1 202607
JPMORGAN CHASE & CO
CIK 0000019617
$6.3B53.0M0.40%Q1 202608
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$6.0B49.8M0.91%Q1 202609
MORGAN STANLEY
CIK 0000895421
$5.7B47.6M0.35%Q1 202610
FMR LLC
CIK 0000315066
$5.4B44.5M0.28%Q1 202611
BANK OF AMERICA CORP /DE/
CIK 0000070858
$3.7B30.8M0.27%Q1 202612
NORTHERN TRUST CORP
CIK 0000073124· Index
$3.3B27.1M0.43%Q1 202613
Fisher Asset Management, LLC
CIK 0000850529
$3.2B26.4M1.08%Q1 202614
Invesco Ltd.
CIK 0000914208
$2.6B21.9M0.40%Q1 202615
GOLDMAN SACHS GROUP INC
CIK 0000886982
$2.6B21.8M0.30%Q1 202616
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
CIK 0000861177
$2.5B20.4M0.51%Q1 202617
Legal & General Group Plc
CIK 0000764068
$2.4B19.5M0.54%Q1 202618
Bank of New York Mellon Corp
CIK 0001390777
$2.3B18.7M0.41%Q1 202619
AMERIPRISE FINANCIAL INC
CIK 0000820027
$2.0B16.3M0.45%Q1 202620
FRANKLIN RESOURCES INC
CIK 0000038777
$2.0B16.3M0.48%Q1 2026
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