InvestorLens

MRK — MERCK & CO INC

Health Care · Drug Manufacturers

Sign in to save5 tracked investors reported this
For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying MRK?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
50
Institutional Conviction
Net distribution · 1 buying vs 1 selling last quarter
41
Macro Tailwind
Macro conditions are mixed for this sector
53
Congressional Activity
0 congressional purchases, 1 sale disclosed in the last 6 months
Why? — Evidence & Confidence ▾

Of 2 tracked investors who changed their MRK position last quarter, 1 bought and 1 sold (50% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 53/100 in a Overheat regime). 0 congressional purchases, 1 sale disclosed in the last 6 months.

Supporting evidence
  • +1 tracked investor added or increased positions last quarter (Ray Dalio)
  • +5 tracked investors reported holding MRK at their latest filing
Contradicting evidence — always shown
  • −1 tracked investor reduced or exited last quarter (0 reduced, 1 sold out)
  • −Congressional disclosures lean toward selling (1 sales vs 0 purchases, 6 months)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/18/2026.

About MERCK & CO INC (MRK)

MERCK & CO INC (MRK) appears in the most recent 13F filings of 5 tracked institutional investors. MERCK & CO INC is classified in the Health Care sector (Drug Manufacturers industry). The largest disclosed position is held by Izzy Englander (Millennium Management), valued at $1.6B. Across recent filings, tracked investors recorded 6 new positions, 8 increased, 7 reduced, and 5 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in MRK

54
/100
Mixed Activity
Added / Increased14
Reduced7
Exited5
BearishBullish
Crowded Trade Score™

How many top investors track MRK

33
/100
Emerging Interest
5investors

A small number of top investors own this.

UndiscoveredCrowded
151015+

MRK Ownership Composition

How MERCK & CO INC is held across tracked investor types, based on reported 13F positions.

Dominant Type
Multi-Strategy / Quant
97% of tracked value
Institutions
5
tracked investors
Total Reported
$1.6B
combined 13F value
Types2
  • Multi-Strategy / Quant96.7%
  • Macro3.3%
Multi-Strategy / Quant(3)
96.7%
Macro(2)
3.3%

Tracked investors currently reporting MRK

1 tracked investor has since exited this position — listed separately below.

  • Izzy EnglanderJun 30, 2026
    Millennium Management
    Shares
    2.1M
    Value
    $271.7M
    % Portfolio
    0.10%
  • Ken GriffinJun 30, 2026
    Citadel Advisors
    Shares
    9.2M
    Value
    $1.2B
    % Portfolio
    0.13%
  • Ray DalioJun 30, 2026
    Bridgewater Associates
    Shares
    30.3K
    Value
    $3.9M
    % Portfolio
    0.02%
  • Paul Tudor JonesJun 30, 2026
    Tudor Investment Corp
    Shares
    368.3K
    Value
    $47.3M
    % Portfolio
    0.07%
  • Steve CohenJun 30, 2026
    Point72 Asset Management
    Shares
    552.7K
    Value
    $71M
    % Portfolio
    0.08%

Previously held MRK

These investors reported MRK in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

InvestorFirmLast reported sharesValue thenLast held
George SorosSoros Fund Management300K$34.1MSep 30, 2024

Recent activity

Frequently asked questions

How many institutional investors hold MRK?
5 tracked institutional investors disclosed a position in MRK (MERCK & CO INC) in their most recent 13F filing.
Who is the largest institutional holder of MRK?
Izzy Englander, Millennium Management, holds the largest disclosed position in MRK, valued at $1.6B.
Did institutional ownership of MRK increase or decrease?
Across recent 13F filings, tracked investors recorded 6 new positions, 8 increased, 7 reduced, and 5 fully exited MRK.
What sector is MRK in?
MERCK & CO INC is classified in the Health Care GICS sector, Drug Manufacturers industry.
Where does this MRK ownership data come from?
SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.
MRK (MERCK & CO INC) — Institutional Holders & 13F History — InvestorLens