MarketPeel
Insider Trading Intelligence
Pricing
…
Mayo Stephen
Fri, May 29, 2026
May 29
bought
$220.00k
of
MRK
1,853.1
shares @ $118.72
Increased holdings by
+14.30%
Cluster Buy
Trade made by a director
Part of a cluster of 2 transactions by 2 insiders
Unscheduled trade
Price 15% above 200-day moving average
MRK
Merck & Co., Inc.
Health Care
Pharmaceuticals
1D
0.00%
1W
+0.70%
1M
+7.73%
3M
—
6M
—
1Y
—
Recent insider activity at MRK
Feb 12
Guindo Chirfi
Sold
$1.21m
Feb 10
Li Dean Y
Sold
$1.20m
Feb 9
Zachary Jennifer
Sold
$3.09m
Feb 9
Zachary Jennifer
Sold
$4.63m
Feb 9
Zachary Jennifer
Sold
$6.77m
Feb 9
Guindo Chirfi
Sold
$1.18m
Feb 6
DeLuca Richard R.
Sold
$4.56m
Feb 6
Oosthuizen Johannes Jacobus
Sold
$1.83m
Full MRK profile →
Mayo Stephen’s trading history →
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