Skip to content

Subscriptions are live.

Plans
Logo
Start Free

Why is $MRK stock moving today?

Merck & Co., Inc. · PHARMACEUTICAL PREPARATIONS

Why is $MRK moving today?

The likely driver

Merck & Co., Inc.: Q2 FY2026 results, three months to Jun 30, 2026
Merck & Co., Inc.: Q2 FY2026 results, three months to Jun 30, 2026
SEC filing · Aug 7

The numbers behind the move

Short interest
13.8% of float
Days to cover
2.2d
Float
219.8M · High
Float rotation
0.1x
Dilution
Heavy

MRK: 13.8% of the float is sold short (2.2 days to cover), active share dilution on file.

Price
$146.63
Move today
+0.0%
Volume vs avg
0.0x
Scanner alerts today
0
Flagged in 30 days
164
Market cap
$362.4B
Prev close
$146.63
Avg volume
10.2M

Nothing has triggered on MRK yet in this session. Our scanner has flagged it 164 times in the last 30 days , most recently on September 18 for big percentage moves, unusual volume, which is why this page is here. See the full MRK page for the chart and the alert history.

Earlier scanner activity on MRK

  • Sep 18Unusual volume (RVOL) alert
  • Sep 18Unusual volume (RVOL) alert
  • Sep 18Unusual volume (RVOL) alert
  • Sep 18Unusual volume (RVOL) alert
  • Sep 17Unusual volume (RVOL) alert
  • Sep 17Unusual volume (RVOL) alert
  • Sep 17Unusual volume (RVOL) alert
  • Sep 15Unusual volume (RVOL) alert
  • Sep 15Unusual volume (RVOL) alert
  • Sep 15Unusual volume (RVOL) alert
  • Sep 15Unusual volume (RVOL) alert
  • Sep 15Unusual volume (RVOL) alert

Prior sessions in the last 30 days. A name our scanner keeps flagging is behaving differently from the rest of the market, even on a quiet day.

Full $MRK page →Live chartTrending stocks

Other stocks moving today

$KAZR +18.6%$DSP +18.6%$ETS +18.2%$FNUC +17.5%$CYPH +17.3%$KXIN -17.1%$SION -17.0%$VEEA -16.5%

Each opens that stock’s own why-is-it-moving page.

Move and volume are based on the latest market data and refresh live on this page. Scanner alerts are our own real-time unusual-volume signals. This is research, not investment advice.