Insider trading

Period: 12 months Stock: MRK Plan: Not on a plan × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

23 decisions over 12 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

23 decisions over 12 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

23 decisions over 12 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

23 decisions over 12 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
23 decisions over 12 months Remove this filter
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
23 decisions over 12 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

23 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
13 Aug 2026
Guindo Chirfi EVP, Access, Policy & Comms
Sold at will
$1.35M 10,000 at 135.00
21.5%
Not planned
12 Aug 2026
Zachary Jennifer EVP, General Counsel
Sold at will
$10.72M 80,315 at 133.46
63.8%
Sold half or more
12 Aug 2026
DeLuca Richard R. EVP&Pres, Merck Animal Heallth
Sold at will 2×
$1.54M 11,699 at 131.63
9.6%
Not planned
11 Aug 2026
DeLuca Richard R. EVP&Pres, Merck Animal Heallth
Sold at will 2×
$1.69M 12,837 at 131.76
9.5%
Not planned
10 Aug 2026
DeLuca Richard R. EVP&Pres, Merck Animal Heallth
Sold at will
$2.71M 20,784 at 130.43
13.4%
Not planned
6 Aug 2026
Guindo Chirfi EVP, Access, Policy & Comms
Sold at will
$1.97M 15,000 at 131.00
24.3%
Not planned
6 Aug 2026
DeLuca Richard R. EVP&Pres, Merck Animal Heallth
Sold at will 3×
$788.77K 6,050 at 130.38
3.7%
Not planned
5 Aug 2026
Williams David Michael EVP,Chief Info&Digital Officer
Sold at will 3×
$6.81M 52,847 at 128.77
62.5%
Sold half or more
5 Aug 2026
Maraldo David R. EVP & Pres. MMD
Sold at will 3×
$2.41M 18,706 at 128.72
50.7%
Sold half or more
12 Feb 2026
Guindo Chirfi Chief Marketing Officer
Sold at will
$1.21M 10,000 at 121.46
14.2%
Not planned
10 Feb 2026
Li Dean Y Executive VP & President, MRL
Sold at will
$1.20M 10,235 at 117.52
10.0%
Not planned
9 Feb 2026
Zachary Jennifer EVP, General Counsel
Sold at will 3×
$14.49M 121,573 at 119.15
63.8%
Sold half or more
9 Feb 2026
Guindo Chirfi Chief Marketing Officer
Sold at will
$1.18M 10,000 at 118.41
12.4%
Not planned
6 Feb 2026
DeLuca Richard R. EVP&Pres, Merck Animal Heallth
Sold at will
$4.56M 37,685 at 120.92
19.0%
Not planned
6 Feb 2026
Oosthuizen Johannes Jacobus President, U.S. Market
Sold at will
$1.83M 15,000 at 121.87
41.4%
Not planned
6 Feb 2026
Williams David Michael EVP,Chief Info&Digital Officer
Sold at will
$609.53K 5,000 at 121.91
14.0%
Not planned
5 Feb 2026
Guindo Chirfi Chief Marketing Officer
Sold at will
$2.44M 20,000 at 121.88
19.9%
Not planned
4 Feb 2026
Davis Robert M Chairman, CEO & President
Sold at will 2×
$5.60M 47,434 at 118.04
9.7%
Not planned
4 Feb 2026
Sold at will
$5.02M 41,997 at 119.61
31.8%
Not planned
4 Feb 2026
Li Dean Y Executive VP & President, MRL
Sold at will
$1.79M 15,087 at 118.77
12.9%
Not planned
4 Feb 2026
Smart Dalton E. III SVP Fin. - Global Controller
Sold at will 2×
$765.92K 6,400 at 119.68
43.8%
Not planned
10 Nov 2025
Downing Cristal N Chief Comm. & Public Afrs Ofcr
Sold at will
$616.40K 7,085 at 87.00
100%
Sold half or more
3 Nov 2025
Williams David Michael EVP,Chief Info&Digital Officer
Sold at will
$720.04K 8,614 at 83.59
26.0%
Not planned
Showing 1–23 of 23.