MRK
MRK 13F Institutional Holders
Merck & Co. INC.
+$26.3B
Net Activity
Data as of: 2026-03-31
Institutions Holding
3796
Popularity Rank
#26
Avg Weight
0.44%
Total Value
$237.3B
Ownership Trend
3796 institutions currently hold MRK, with 1721 net buyers and 1733 net sellers this quarter.
Institutional Moves
Institutional Moves (Q1 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
1733
Net Buying Institutions
1721
Key Holders
Key Holders
Top 5 by Value
Across its top 20 institutional holders, MRK's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 17/100).
Quarterly Activity
Recent Activity
+$112.5B
Total Buy Value
$95.0B
Total Sell Value
New buy274
Trim1599
Add1447
Sold out134
1721
Net Buyers
1733
Net Sellers
Game Theory Scenarios
Bullish— Smart Money Convergence
Institutions heavily accumulate, insider selling limited
Signal Basis
13F data shows MRK institutional net value increased by $26.3B, with 1,721 net buyers vs. 1,733 net sellers, indicating strong accumulation; insider activity shows 16 sells totaling ~$40.7M over 90 days with zero buys.
Confirmation
Continued institutional buying or a shift to insider buying would further confirm the bullish outlook.
Invalidation Risk
An escalation in insider selling or a broad institutional reduction could invalidate this verdict.
Compiled by AI directly from institutional holders' regulatory filings on SEC EDGAR; describes past institutional behavior only. Not a substitute for independent investment research.
See the institutional 13F filings behind this signalSmart Money Convergence
MRK does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
Terms of Use for AI
AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/MRK
Insider Trading (Form 4)
90d confidence
0
unique buyers
—
buy value
data as of 2026-07-24
12-Month Buy/Sell Activity
Feb 25
Feb 26
BuySell
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | Guindo Chirfi | 2026-02-12 | $1.21M |
| Sell | Li Dean Y | 2026-02-10 | $1.20M |
| Sell | Guindo Chirfi | 2026-02-09 | $1.18M |
| Sell | Zachary Jennifer | 2026-02-09 | $4.63M |
| Sell | Zachary Jennifer | 2026-02-09 | $6.77M |
| Sell | Zachary Jennifer | 2026-02-09 | $3.09M |
| Sell | Williams David Michael | 2026-02-06 | $610K |
| Sell | Oosthuizen Johannes Jacobus | 2026-02-06 | $1.83M |
Form 144 Pre-Sale Notices
No Form 144 planned sale filings in the last 90 days
Beneficial Ownership (13D/13G)
No Schedule 13D/13G filings for this ticker
Material Events (8-K)
No Form 8-K filings for this ticker
CUSIP
58933Y105, 589331107, 58933Y10 , 58933Y905, 58933Y955, 58933y105
FAQ
Who are the top institutional investors holding MERCK & CO. INC. (MRK)?
Major stakeholders currently include BlackRock, Inc. ($27.2B), Vanguard Capital Management LLC ($19.4B), State Street CORP ($14.5B). Based on the latest 13F filings, there are a total of 3796 tracked investment funds and institutions maintaining positions in MRK.
What is the overall institutional sentiment toward MRK recently?
Institutional sentiment appears Bullish (Net Buying). During the most recent reporting quarter, the stock experienced a net inflow of $26.3B, driven by 1721 managers accumulating shares while 1733 reduced their exposure.
Which institutions have been selling or reducing their MRK positions?
In the latest period, 1599 funds trimmed their holdings, and 134 managers completely exited their positions. The aggregate reported sell value was $95.0B.
Are there any notable investors adding MRK to their portfolios?
Yes, buying activity remains notable. 274 institutions opened new positions in {ticker}, and 1447 existing holders added to their shares. The total reported buy value for the quarter amounted to $112.5B.
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Developer Access
Access MRK's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/MRKCLI
npx alphasmo stocks get MRK