$MRK
Merck & Co., Inc.
XNYS•Health Care•Pharmaceutical Preparations
Why is MRK down today? It is at $148.99 (-2.11%), and our scanner flagged it 82 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment MRK spikes, and full due diligence on MRK — key stats, earnings, dilution and insider activity. Free.
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Key Stats
- Price
- $148.99
- Change today
- -2.11%
- Previous close
- $152.20
- 52-week range
- $77.58 – $153.50
- Market cap
- $333.49B
- Dividend yield
- 2.23% ($3.40)
- Ex-dividend
- Sep 15
- Institutional own.
- 90.97%
- Total held
- 91.1%
- Tradeable float
- 219.1M 9% of shares · after <1% insiders + 91% institutions
- Short interest
- 28.3M ▼ -4% vs prior · as of 2026-07-31
- Short % of float
- 12.9%
- Days to cover
- 3.3d
- Avg daily volume
- 11.7M
- Sector
- Health Care
- Industry
- Pharmaceutical Preparations
- Exchange
- XNYS
- 5mthin
- 0.0x
- 15mthin
- 0.7x
- 1hthin
- 1.0x
- 1D
- 0.3x
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Why is $MRK down today?
MRK is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 7 unusual-volume and momentum alerts on MRK today, peaking at 25.0x its normal volume.
Analyst data via Nasdaq. Not investment advice.
From the trading subreddits (WallStreetBets, r/stocks and more). Retail chatter, not a signal. Do your own research.
Insiders
Insiders selling0 buys, 9 sells last 3 months (11/38 over 12 months)Show 12 recent transactionsMinimize 12 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Guindo Chirfi Officer | Sold (automatic/other) | -10K | sold 21% | 37K | $1.4M at $135.00 | Aug 13, 26 |
Deluca Richard R. Officer | Sold (automatic/other) | -12K | sold 9.6% | 110K | $1.5M at $131.61 | Aug 12, 26 |
Zachary Jennifer Officer | Sold (automatic/other) | -80K | sold 64% | 46K | $10.7M at $133.46 | Aug 12, 26 |
Zachary Jennifer Officer | Other | 55K | added 77% | 126K | $4.7M at $84.71 | Aug 12, 26 |
Deluca Richard R. Officer | Sold (automatic/other) | -13K | sold 9.5% | 122K | $1.7M at $131.33 | Aug 11, 26 |
Deluca Richard R. Officer | Sold (automatic/other) | -21K | sold 13% | 135K | $2.7M at $130.43 | Aug 10, 26 |
Guindo Chirfi Officer | Sold (automatic/other) | -15K | sold 24% | 47K | $2.0M at $131.00 | Aug 6, 26 |
Deluca Richard R. Officer | Sold (automatic/other) | -6K | sold 3.7% | 155K | $788K at $130.23 | Aug 6, 26 |
Williams David Michael Officer | Sold (automatic/other) | -53K | sold 62% | 32K | $6.8M at $128.77 | Aug 5, 26 |
Williams David Michael Officer | Other | 53K | added 100% | 66K | $3.9M at $73.73 | Aug 5, 26 |
Maraldo David R. Officer | Sold (automatic/other) | -19K | sold 51% | 18K | $2.4M at $128.72 | Aug 5, 26 |
Maraldo David R. Officer | Other | 19K | added 100% | 28K | $1.4M at $73.73 | Aug 5, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
Dilution watch
UnavailableWe could not reach SEC EDGAR, so the dilution check did not run for $MRK. This is not a clean result: there may be an offering, a registration or a shelf on file that we were unable to read. Check it yourself on SEC EDGAR before trading it.
$MRK Sentiment
BullishBlend of news sentiment, today’s move, and community votes. Not investment advice.
$MRK Activity
News, unusual-volume alerts, AI-trader trades and community chatter - the whole story, newest first.
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MRK is in these themes
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MRK stock FAQ
Why is $MRK down today?
MRK is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 7 unusual-volume and momentum alerts on MRK today, peaking at 25.0x its normal volume.
What is the MRK stock price today?
MRK last traded at $148.99, down 2.11% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Does MRK pay a dividend?
Yes. MRK currently has a dividend yield of about 2.23% ($3.40 per share per year), with the next ex-dividend date on Sep 15. Dividend figures can change; this is not investment advice.
Where can I see live MRK alerts?
The MRK Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged MRK 82 times in the last 30 days.
What exchange is MRK on?
MRK (Merck & Co., Inc.) trades on XNYS, with a market cap of about $333.49B in the PHARMACEUTICAL PREPARATIONS sector.
Is MRK good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge MRK for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.