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MRK · Healthcare

Merck & Co Inc

USA Healthcare Filing: 2026-03-31
28/100
Smart-money confidence1 of 3 sources positive
Weak — few signals

No standout activity across the feeds we track.

Hedge funds
38
Congress
No data
Insiders
No data
Cross-source blend of hedge-fund breadth, Congress trades, and insider Form 4s.  ·  how the score works
Market cap
$332.5B
Industry
Drug Manufacturers - General
Sector
Healthcare
Exchange
NYSE
About MERCK & CO INC

Merck & Co., Inc. operates as a healthcare company worldwide. It offers human health pharmaceutical for various areas under the Keytruda, Keytruda Qlex, Welireg, Gardasil, ProQuad, M-M-R II, Varivax, Vaxneuvance, Capvaxive, RotaTeq, Pneumovax 23, Bridion, Prevymis, Dificid, Zerbaxa, Winrevair, Adempas/ Verquvo, Ohtuvayre, Lagevrio, Isentress/Isentress HD, Delstrigo, Pifeltro, Belsomra, Januvia, and Janumet brands. The company also provides veterinary pharmaceuticals, vaccines and health management solutions and services, such as livestock products under the Nuflor, Bovilis/Vista, Bovilis…

Who's behind the signal
Every informed buyer we can see on MRK, across all three feeds.
Hedge funds · 7
AQR Capital Management Decreased −23%
D.E. Shaw & Co Decreased −3%
Citadel Advisors Decreased −44%
Point72 (Steve Cohen) Decreased −31%
+1 more in the full breakdown below ↓
Congress · 0
No congressional trades on record.
Insiders
No significant Form 4 insider activity in the window.
Congressional trades · 50 on record
Disclosures from 2018-01-16 to 2022-09-15
The newest disclosure we hold for this stock is 2022-09-15. That is the end of our data, not necessarily the end of the trading — our bulk STOCK Act archive stops there and newer filings arrive through a separate live feed. Treat the absence of recent rows as “not covered”, not as “no trades”.
Trade date Member Chamber Action Amount
2022-09-15 Earl Blumenauer · D-OR House Sold $15,001 - $50,000
2022-09-12 Kathy E. Manning · D-NC House Bought $1,001 - $15,000
2022-06-01 Lois Frankel · D-FL House Sold $1,001 - $15,000
2022-02-28 Robert J. Wittman · R-VA House Sold $1,001 - $15,000
2021-12-03 Lois Frankel · D-FL House Bought $1,001 - $15,000
2021-11-26 Bob Gibbs · R-OH House Bought $1,001 - $15,000
2021-10-05 Gus M. Bilirakis · R-FL House Sold $1,001 - $15,000
2021-09-30 Zoe Lofgren · D-CA House Bought $1,001 - $15,000
2021-09-16 Katherine M. Clark · D-MA House Sold $1,001 - $15,000
2021-07-28 Carol D. Miller · R-WV House Sold $15,001 - $50,000
Show the other 40
Trade date Member Chamber Action Amount
2021-07-27 Katherine M. Clark · D-MA House Bought $1,001 - $15,000
2021-07-19 John R. Curtis · R-UT House Sold $1,001 - $15,000
2021-04-09 Sara Jacobs · D-CA House Sold $50,001 - $100,000
2021-03-17 William R. Keating · D-MA House Bought $1,001 - $15,000
2021-03-10 Rick W. Allen · R-GA House Sold $15,001 - $50,000
2021-03-05 Michael T. McCaul · R-TX House Bought $15,001 - $50,000
2021-02-25 Ro Khanna · D-CA House Bought $1,001 - $15,000
2021-02-05 Kurt Schrader · D-OR House Bought $1,001 - $15,000
2021-01-28 Peter Meijer · R-MI House Sold $1,001 - $15,000
2021-01-13 Peter Meijer · R-MI House Bought $1,001 - $15,000
2020-11-13 Michael T. McCaul · R-TX House Bought $50,001 - $100,000
2020-11-13 Michael T. McCaul · R-TX House Bought $15,001 - $50,000
2020-10-07 Lois Frankel · D-FL House Bought $1,001 - $15,000
2020-09-23 Lois Frankel · D-FL House Bought $1,001 - $15,000
2020-07-02 Rick W. Allen · R-GA House Bought $15,001 - $50,000
2020-04-16 David Perdue · R-GA Senate Sold $1,001 - $15,000
2020-04-15 Lois Frankel · D-FL House Bought $1,001 - $15,000
2020-04-14 David Perdue · R-GA Senate Sold $50,001 - $100,000
2020-04-14 David Perdue · R-GA Senate Sold $15,001 - $50,000
2020-04-07 Kelly Loeffler · R-GA Senate Bought $15,001 - $50,000
2020-04-06 David Perdue · R-GA Senate Sold $1,001 - $15,000
2020-04-03 David Perdue · R-GA Senate Sold $15,001 - $50,000
2020-03-31 David Perdue · R-GA Senate Sold $15,001 - $50,000
2020-03-30 Robert J. Wittman · R-VA House Bought $1,001 - $15,000
2020-03-27 John R. Curtis · R-UT House Bought $1,001 - $15,000
2020-03-23 Zoe Lofgren · D-CA House Sold $1,001 - $15,000
2020-02-20 Lois Frankel · D-FL House Bought $1,001 - $15,000
2020-02-20 Mikie Sherrill · D-NJ House Sold $1,001 - $15,000
2020-02-19 Lois Frankel · D-FL House Bought $1,001 - $15,000
2020-02-06 Mikie Sherrill · D-NJ House Sold $1,001+
2020-02-05 Kelly Loeffler · R-GA Senate Sold $1,001 - $15,000
2020-01-13 Mike Gallagher · R-WI House Sold $1,001 - $15,000
2019-04-10 David Perdue · R-GA Senate Sold $15,001 - $50,000
2019-02-19 David Perdue · R-GA Senate Sold $15,001 - $50,000
2019-01-11 James M. Inhofe · R-OK Senate Sold $100,001 - $250,000
2018-10-29 David Perdue · R-GA Senate Sold $1,001 - $15,000
2018-10-03 David Perdue · R-GA Senate Sold $15,001 - $50,000
2018-06-04 Susan M. Collins · R-ME Senate Bought $1,001 - $15,000
2018-04-24 David Perdue · R-GA Senate Bought $1,001 - $15,000
2018-01-16 David Perdue · R-GA Senate Bought $100,001 - $250,000
Not a model pick — but on our radar. MERCK & CO INC isn't in the top-10 model right now, but 7 tracked investors hold it. Everything below is real signal from public filings — treat this as a watch candidate, not a conviction call.
7
Investors
0
New positions
1
Increasing
5
Decreasing
1
Unchanged
Price History
Loading price data...
Return: High: Low:
Who's Holding This Stock
Position sizes and recent activity from tracked institutional investors
Trust weight: 1.1×
Increased +13%
% of portfolio
0.2%
Position change
+13%
0.2% of Gotham Asset Mgmt's portfolio
Trust weight: 1.0×
Decreased −23%
% of portfolio
0.5%
Position change
−23%
0.5% of AQR Capital Management's portfolio
Trust weight: 1.0×
Decreased −3%
% of portfolio
0.3%
Position change
−3%
0.3% of D.E. Shaw & Co's portfolio
Trust weight: 1.0×
Decreased −44%
% of portfolio
0.3%
Position change
−44%
0.3% of Citadel Advisors's portfolio
Trust weight: 1.3×
Unchanged
% of portfolio
0.3%
Position change
0.3% of Polen Capital Management's portfolio
Trust weight: 1.1×
Decreased −31%
% of portfolio
0.2%
Position change
−31%
0.2% of Point72's portfolio
Trust weight: 1.0×
Decreased −71%
% of portfolio
0.2%
Position change
−71%
0.2% of Millennium Management's portfolio
Portfolio Allocation
How much of each investor's portfolio is allocated to MERCK & CO INC
⚠ Disclaimer: This page is for informational purposes only. Holdings data from SEC EDGAR 13F filings, delayed up to 135 days. Not a recommendation to buy or sell MERCK & CO INC or any security.

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