Merck & Co.

MRK • NYSE

Merck & Co. is a drug manufacturers - general company in the healthcare sector on NYSE, led by Robert M. Davis, with a market cap of $250.41B. As of Q3 2025, 76% of shares are held by 3,211 institutional investors, with VANGUARD GROUP INC as the largest holder at 10.09%.

CEO and PresidentRobert M. Davis

Market Cap$250.41B

Drug Manufacturers - General

Healthcare

Websitemerck.com

Country

United States of America

Overview

Overview of institutional ownership in MRK as of Q3 2025 with a market cap of $209.64B

All Institutions

Institutions: 3,211
Value Held: $158.29B
Shares Held: 1.89B
Avg Position: $49.3M
Median Position: $1.2M

Hedge Funds

Hedge Funds: 105
Value Held: $4.4B
Shares Held: 53.1M
Avg Position: $42.0M
Median Position: $4.4M

Ownership Breakdown

Institutional (non-HF)

73.4%

$153.88B

Hedge Funds

2.1%

$4.4B

Retail & Other

24.49%

$51.3B

Based on market cap of $209.64B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in MRK as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
VANGUARD GROUP INC Institution	Salim Ramji CEO	$21.2B 0.32% of portfolio	10.09% 252.1M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
B BlackRock, Inc. Institution	-	$18.0B 0.32% of portfolio	8.60% 214.9M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$10.0B 0.35% of portfolio	4.73% 118.2M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
WELLINGTON MANAGEMENT CO LLP Long Only Manager	Edmund Wellington Iii President	$6.3B 1.11% of portfolio	3.01% 75.3M shares	≤ Q2 2013 Held for 12y 5m+	$571.21B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$5.0B 0.32% of portfolio	2.39% 59.8M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
SCHWAB CHARLES INVESTMENT MANAGEMENT INC Long Only Manager	Omar Aguilar Chavez CEO	$4.5B 0.73% of portfolio	2.15% 53.7M shares	≤ Q2 2013 Held for 12y 5m+	$620.51B
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$3.7B 0.23% of portfolio	1.79% 44.6M shares	≤ Q2 2013 Held for 12y 5m+	$1.65T
JPMORGAN CHASE & CO Institution	Jamie Dimon CEO	$3.0B 0.19% of portfolio	1.41% 35.2M shares	≤ Q2 2013 Held for 12y 5m+	$1.56T
FMR LLC Institution	-	$2.8B 0.15% of portfolio	1.34% 33.4M shares	≤ Q2 2013 Held for 12y 5m+	$1.92T
NORTHERN TRUST CORP Institution	Michael G. O'Grady CEO	$2.3B 0.30% of portfolio	1.12% 27.9M shares	≤ Q2 2013 Held for 12y 5m+	$782.01B

Net Capital Flow

Institutional buying and selling activity for MRK in Q3 2025

Net Flow: −$3.0B
Buyers: 1,379
Sellers: 1,534
Total Bought: +$5.4B
Total Sold: −$8.4B
Avg Position: $48.5M

Biggest Buyers

Institution	Net Bought	Current Position
A Assenagon Asset Management S.A. Institution	+$303.7M +3.6M shares	$461.3M 5.5M shares
JPMORGAN CHASE & CO Institution	+$283.7M +3.4M shares	$3.0B 35.2M shares
Invesco Ltd. ETF Provider	+$236.8M +2.8M shares	$1.7B 19.8M shares
PRICE T ROWE ASSOCIATES INC /MD/ Long Only Manager	+$235.3M +2.8M shares	$1.1B 13.6M shares
AMERIPRISE FINANCIAL INC Institution	+$229.5M +2.7M shares	$1.3B 15.9M shares
VAN ECK ASSOCIATES CORP ETF Provider	+$170.3M +2.0M shares	$446.9M 5.3M shares
FMR LLC Institution	+$156.2M +1.9M shares	$2.8B 33.4M shares
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$149.4M +1.9M shares	$851.4M 10.7M shares
BARCLAYS PLC Institution	+$135.7M +1.6M shares	$630.6M 7.5M shares
Capital Wealth Planning, LLC RIA/Wealth	+$134.7M +1.6M shares	$267.9M 3.2M shares

Biggest Sellers

Institution	Net Sold	Current Position
FRANKLIN RESOURCES INC Institution	−$863.3M −10.3M shares	$1.4B 16.7M shares
D D. E. Shaw & Co., Inc. Institution	−$579.1M −6.9M shares	$291.1M 3.5M shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	−$451.8M −5.4M shares	$1.7B 19.7M shares
B BlackRock, Inc. Institution	−$290.8M −3.5M shares	$18.0B 214.9M shares
GOLDMAN SACHS GROUP INC Institution	−$282.9M −3.4M shares	$1.3B 15.0M shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	−$281.8M −3.4M shares	$194.8M 2.3M shares
Kingstone Capital Partners Texas, LLC RIA/Wealth	−$258.3M −3.3M shares	Sold Off 0 shares
C CI Private Wealth, LLC RIA/Wealth	−$209.7M −2.5M shares	$202.7M 2.4M shares
Marshall Wace LLP Institution	−$189.7M −2.3M shares	$74.2M 883.9K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	−$165.8M −2.0M shares	$184.9M 2.2M shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited MRK in Q3 2025

New Positions: 39
New Value: $21.3M
Exited Positions: 147
Exited Value: $540.1M

New Positions

Institution	Position Value
Arrow Capital Pty Ltd Hedge Fund•Market Neutral	$5.1M 40.0K shares
Optimist Retirement Group LLC RIA/Wealth	$2.4M 28.6K shares
E Econ Financial Services Corp Institution	$2.0M 24.2K shares
Blackstone Group L.P. Institution	$1.1M 13.6K shares
P PINNBROOK CAPITAL MANAGEMENT LP Hedge Fund•Global Macro	$1.0M 11.9K shares
S Stonegate Management LLC Institution	$868.2K 10.2K shares
Elevate Capital Advisors, LLC RIA/Wealth	$725.6K 8.6K shares
LifePlan Financial, LLC RIA/Wealth	$595.3K 7.1K shares
P Polymer Capital Management LLC Hedge Fund•Multi-Strategy	$536.3K 6.4K shares
BANYAN CAPTIAL MANAGEMENT, INC. RIA/Wealth	$536.2K 6.4K shares

Exited Positions

Institution	Previous Position
Kingstone Capital Partners Texas, LLC RIA/Wealth	$258.3M 3.3M shares
Z Zurich Insurance Group Ltd/FI Institution	$40.6M 513.3K shares
Weiss Asset Management LP Hedge Fund•Multi-Strategy	$35.4M 447.4K shares
WORLDQUANT MILLENNIUM QUANTITATIVE STRATEGIES LLC Hedge Fund•Multi-Strategy	$35.3M 446.4K shares
Trexquant Investment LP Hedge Fund•Quant	$15.5M 196.1K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$13.9M 176.1K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	$11.1M 139.8K shares
M MIRAE ASSET SECURITIES INC. Institution	$9.9M 125.3K shares
Y Y-Intercept Ltd Institution	$8.9M 111.8K shares
L Lombard Odier Asset Management Ltd Private Equity	$7.5M 94.9K shares

Options Activity

Institutions with the largest Call and Put options positions in MRK as of Q3 2025

Call Positions: 67
Call Value: $2.6B
Put Positions: 61
Put Value: $2.3B

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$520.2M 62.0K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$496.7M 59.2K contracts
J JANE STREET GROUP, LLC Institution	$186.4M 22.2K contracts
BANK OF AMERICA CORP /DE/ Institution	$138.8M 16.5K contracts
D D. E. Shaw & Co., Inc. Institution	$94.7M 11.3K contracts
Q Qube Research & Technologies Ltd Institution	$94.3M 11.2K contracts
CITIGROUP INC Institution	$93.4M 11.1K contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$90.6M 10.8K contracts
TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy	$87.8M 10.5K contracts
ExodusPoint Capital Management, LP Hedge Fund•Multi-Strategy	$83.9M 10.0K contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$503.1M 59.9K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$326.1M 38.9K contracts
BANK OF AMERICA CORP /DE/ Institution	$155.4M 18.5K contracts
CITIGROUP INC Institution	$144.8M 17.3K contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$133.9M 16.0K contracts
J JANE STREET GROUP, LLC Institution	$105.0M 12.5K contracts
Q Qube Research & Technologies Ltd Institution	$100.7M 12.0K contracts
UBS Group AG Institution	$84.2M 10.0K contracts
D D. E. Shaw & Co., Inc. Institution	$76.8M 9.1K contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$71.9M 8.6K contracts

Most Committed Institutions

Institutions with MRK as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
P PKS Advisory Services, LLC RIA/Wealth	Pamela Sue Young President	10.25% $49.0M	0.00% 5.8K shares	Q4 2024 Held for 11 months	$478.0M
T Tri Locum Partners LP Hedge Fund•Long/Short	Prashanth Nmn Jayaram CIO	8.62% $37.5M	0.02% 446.9K shares	Q3 2025 Held for 2 months	$435.1M
Wallace Advisory Group, LLC RIA/Wealth	Hosler Lee Wall President	7.38% $9.2M	0.00% 115.7K shares	Q4 2022 Held for 2y 11m	$124.1M
DLD Asset Management, LP Hedge Fund•Multi-Strategy	Mark Lawrence Friedman CIO	6.73% $47.1M	0.02% 561.7K shares	Q2 2025 Held for 5 months	$700.9M
S SECTOR GAMMA AS Institution	-	6.71% $27.1M	0.01% 322.5K shares	Q2 2025 Held for 5 months	$403.3M
R Radnor Capital Management, LLC Institution	-	6.65% $43.7M	0.02% 521.0K shares	Q4 2016 Held for 8y 11m	$657.3M
Clark & Stuart, Inc RIA/Wealth	Charles Stone Clark CCO	6.55% $9.2M	0.00% 108.1K shares	Q4 2024 Held for 11 months	$139.9M
O OPTIMAS CAPITAL Ltd Institution	-	6.49% $10.3M	0.00% 122.3K shares	Q3 2025 Held for 2 months	$158.1M
Slocum, Gordon & Co LLP RIA/Wealth	Barclay Douglas Partner	6.36% $8.0M	0.00% 95.0K shares	Q4 2022 Held for 2y 11m	$125.4M
K KAHN BROTHERS & CO INC /DE/ RIA/Wealth	Adama Nmn Kah CEO	6.30% $36.4M	0.02% 433.8K shares	≤ Q2 2013 Held for 12y 5m+	$578.1M

Hedge Fund Spotlight

Discover hedge funds investing in MRK

Core Wealth Partners LLC

Hedge Fund • Long/Short

Portfolio ManagerMichael John Hall

Portfolio Value: $217.4M
Positions: 177
Last Reported: Q3 2025

Sector Allocation

Position in Merck & Co.

Market Value: $589.6K
Shares Held: 7.0K
Portfolio Weight: 0.27%
Owned Since: 2022-Q4

Top Holding	Sector	Market Value	Weight
1 Apple AAPL	Consumer Electronics Technology	$16.5M	7.57%
2 Rockwell Automation ROK	Industrial - Machinery Industrials	$14.6M	6.70%
3 Microsoft MSFT	Software - Infrastructure Technology	$8.0M	3.70%