MRK · Healthcare
Merck & Co Inc
34/100
Smart-money confidence1 of 3 sources positive
Below average interest
No standout activity across the feeds we track.
What this band has actually done: stocks scoring 0–25 beat the S&P 500 over the next three months 39.9% of the time, across 100,496 cases since 2015. That is below a coin flip — and so is every other band, because the median stock loses to a cap-weighted index. How we measured this
Hedge funds
45
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
$367.1B
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 · 9
Bridgewater Associates (Dalio)
New position
Gotham Asset Mgmt (Greenblatt)
Increased +4%
AQR Capital Management
Decreased −6%
D.E. Shaw & Co
Decreased −19%
Polen Capital Management
Unchanged
Citadel Advisors
Decreased −49%
+3 more in the full breakdown below ↓
Congress · 21
Maria Elvira Salazar
bought
Alan Armstrong
sold
Josh Gottheimer
bought
Gilbert Ray Cisneros, Jr.
bought
Julie Johnson
sold
Val T. Hoyle
sold
Marjorie Taylor Greene
bought
Lisa C. McClain
sold
+13 more in the full record below ↓
Insiders
No significant Form 4 insider activity in the window.
Congressional trades · 50 on record
Disclosures from 2023-11-10 to 2026-08-19
| Trade date | Member | Chamber | Action | Amount |
|---|---|---|---|---|
| 2026-08-19 | Maria Elvira Salazar · R-FL | House | Bought | $15,001 - $50,000 |
| 2026-03-27 | Alan Armstrong · R-OK | Senate | Sold | $15,001 - $50,000 |
| 2026-02-04 | Josh Gottheimer · D-NJ | House | Bought | $1,001 - $15,000 |
| 2025-12-19 | Gilbert Ray Cisneros, Jr. · D-CA | House | Bought | $1,001 - $15,000 |
| 2025-12-18 | Julie Johnson · D-TX | House | Sold | $1,001 - $15,000 |
| 2025-11-18 | Gilbert Ray Cisneros, Jr. · D-CA | House | Bought | $1,001 - $15,000 |
| 2025-11-13 | Julie Johnson · D-TX | House | Sold | $1,001 - $15,000 |
| 2025-09-23 | Val T. Hoyle · D-OR | House | Sold | $1,001 - $15,000 |
| 2025-08-28 | Marjorie Taylor Greene · R-GA | House | Bought | $1,001 - $15,000 |
| 2025-08-14 | Julie Johnson · D-TX | House | Sold | $1,001 - $15,000 |
Show the other 40
| Trade date | Member | Chamber | Action | Amount |
|---|---|---|---|---|
| 2025-08-05 | Gilbert Ray Cisneros, Jr. · D-CA | House | Bought | $1,001 - $15,000 |
| 2025-08-04 | Lisa C. McClain · R-MI | House | Sold | $1,001 - $15,000 |
| 2025-07-11 | Ritchie Torres · D-NY | House | Sold | $1,001 - $15,000 |
| 2025-06-24 | Lisa C. McClain · R-MI | House | Bought | $1,001 - $15,000 |
| 2025-06-16 | Scott Franklin · R-FL | House | Sold | $1,001 - $15,000 |
| 2025-06-13 | Julie Johnson · D-TX | House | Bought | $1,001 - $15,000 |
| 2025-05-30 | Gilbert Ray Cisneros, Jr. · D-CA | House | Sold | $1,001 - $15,000 |
| 2025-05-15 | Robert P. Bresnahan, Jr. · R-PA | House | Sold | $15,001 - $50,000 |
| 2025-05-05 | Marjorie Taylor Greene · R-GA | House | Bought | $1,001 - $15,000 |
| 2025-04-29 | Gilbert Ray Cisneros, Jr. · D-CA | House | Bought | $1,001 - $15,000 |
| 2025-04-21 | Bruce Westerman · R-AR | House | Sold | $1,001 - $15,000 |
| 2025-04-17 | Jefferson Shreve · R-IN | House | Sold | $15,001 - $50,000 |
| 2025-04-09 | Marjorie Taylor Greene · R-GA | House | Bought | $1,001 - $15,000 |
| 2025-04-08 | Robert P. Bresnahan, Jr. · R-PA | House | Bought | $15,001 - $50,000 |
| 2025-03-31 | Gilbert Ray Cisneros, Jr. · D-CA | House | Sold | $15,001 - $50,000 |
| 2025-03-20 | Kelly Morrison · D-MN | House | Sold | $1,001 - $15,000 |
| 2025-03-19 | Sheri Biggs · R-SC | House | Sold | $15,001 - $50,000 |
| 2025-03-03 | Bruce Westerman · R-AR | House | Bought | $1,001 - $15,000 |
| 2025-02-26 | Gilbert Ray Cisneros, Jr. · D-CA | House | Bought | $15,001 - $50,000 |
| 2025-02-25 | Robert P. Bresnahan, Jr. · R-PA | House | Sold | $15,001 - $50,000 |
| 2025-02-24 | Jefferson Shreve · R-IN | House | Bought | $15,001 - $50,000 |
| 2025-01-27 | Josh Gottheimer · D-NJ | House | Sold | $15,001 - $50,000 |
| 2025-01-24 | Gilbert Ray Cisneros, Jr. · D-CA | House | Sold | $1,001 - $15,000 |
| 2025-01-17 | Julie Johnson · D-TX | House | Bought | $1,001 - $15,000 |
| 2025-01-16 | Byron Donalds · R-FL | House | Sold | $1,001 - $15,000 |
| 2025-01-15 | Jared Moskowitz · D-FL | House | Sold | $1,001 - $15,000 |
| 2024-11-08 | Jared Moskowitz · D-FL | House | Bought | $1,001 - $15,000 |
| 2024-10-29 | Val T. Hoyle · D-OR | House | Bought | $1,001 - $15,000 |
| 2024-09-26 | Ritchie Torres · D-NY | House | Bought | $1,001 - $15,000 |
| 2024-09-24 | Jonathan L. Jackson · D-IL | House | Sold | $15,001 - $50,000 |
| 2024-09-04 | John James · R-MI | House | Sold | $1,001 - $15,000 |
| 2024-08-07 | Scott Franklin · R-FL | House | Bought | $1,001 - $15,000 |
| 2024-08-02 | Scott Franklin · R-FL | House | Bought | $1,001 - $15,000 |
| 2024-07-02 | Kathy E. Manning · D-NC | House | Bought | $1,001 - $15,000 |
| 2024-06-21 | Josh Gottheimer · D-NJ | House | Sold | $1,001 - $15,000 |
| 2024-04-10 | Michael C. Burgess · R-TX | House | Sold | $1,001 - $15,000 |
| 2024-01-23 | Kathy E. Manning · D-NC | House | Bought | $1,001 - $15,000 |
| 2024-01-23 | Kathy E. Manning · D-NC | House | Bought | $15,001 - $50,000 |
| 2023-12-28 | Jared Moskowitz · D-FL | House | Bought | $1,001 - $15,000 |
| 2023-11-10 | John James · R-MI | House | Bought | $1,001 - $15,000 |
Not a model pick — but on our radar.
MERCK & CO INC isn't in the top-10 model right now, but 9 tracked investors hold it. Everything below is real signal from public filings — treat this as a watch candidate, not a conviction call.
9
Investors
1
New positions
1
Increasing
5
Decreasing
2
Unchanged
Price History
Loading price data...
A member of Congress bought
A member sold
Return:
High:
Low:
Markers sit on the transaction date the member disclosed, snapped to the nearest close on the chart. They are not the date the public found out — that came later, and the gap is its own page. Every marker is listed by name in the table above.
Who's Holding This Stock
Position sizes and recent activity from tracked institutional investors
Trust weight: 1.3×
% of portfolio
0.0%
Position change
NEW
0.0% of Bridgewater Associates's portfolio
Trust weight: 1.1×
% of portfolio
0.2%
Position change
+4%
0.2% of Gotham Asset Mgmt's portfolio
Trust weight: 1.0×
% of portfolio
0.4%
Position change
−6%
0.4% of AQR Capital Management's portfolio
Trust weight: 1.0×
% of portfolio
0.2%
Position change
−19%
0.2% of D.E. Shaw & Co's portfolio
Trust weight: 1.3×
% of portfolio
0.2%
Position change
—
0.2% of Polen Capital Management's portfolio
Trust weight: 1.0×
% of portfolio
0.1%
Position change
−49%
0.1% of Citadel Advisors's portfolio
Trust weight: 1.1×
% of portfolio
0.1%
Position change
−59%
0.1% of Point72's portfolio
Trust weight: 1.0×
% of portfolio
0.1%
Position change
−72%
0.1% of Millennium Management's portfolio
Trust weight: 1.2×
% of portfolio
0.0%
Position change
—
0.0% of Dodge & Cox'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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