Merck MRK Insider Ownership

NYSE MRK

$148.10 +4.46 (+3.11%)

As of: Oct 20, 2026 · 11:25 AM EDT

Insider Holdings by Owner

1.84Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

0.041%

▼-0.0041% pp QoQ

Shares Held by Insiders

1.01Mn

filed for Sep 2026

▼-9.19% QoQ

Shares Outstanding

2.47Bn

2,470,000,000 shares

Direct Holdings

1.01Mn

Indirect: 0

Net Shares Traded (QoQ)

-101.76K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 11, 2026

Over the past 12 months, Merck insiders sold $72.01 million of stock on the open market (584.35K shares) and made no open-market purchases.

A count shows 11 insiders selling MRK stock on the open market over the past 12 months and none buying.
The largest open-market sales of MRK in the past 12 months were by Jennifer Zachary (EVP, General Counsel), totaling $25.2 million (201.89K shares), most recently on August 12, 2026.
The latest open-market trade on record is a sale of 10K shares for $1.35 million by Chirfi Guindo (EVP, Access, Policy & Communications) on August 13, 2026.
Apart from open-market trades, MRK insiders received 149.25K shares in stock awards, acquired 363.28K shares through option exercises and conversions and gave up 22.92K shares to cover taxes or exercise prices in the past 12 months.
Per Business Quant, MRK insiders together hold 1.01Mn shares based on their latest Form 4 filings, down 9.19% from 1.11Mn shares at the end of Q2 2026 and down 16.04% from 1.2Mn shares at the end of Q3 2025.
All of the 1.01Mn shares held by Merck insiders are held directly, none through trusts, partnerships or other entities.
Business Quant counts 17 insiders with holdings in Merck stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
MRK's three largest insider shareholders, per their latest Form 4 filings, are Robert M. Davis (Chairman, CEO & President, 450.35K shares), Richard R. Deluca (Evppres, Merck Animal Heallth, 110.17K shares) and Dean Y. Li (Executive VP & President, MRL, 94.43K shares).
Of the shares held by MRK insiders, 44.78% belong to Robert M. Davis.
Institutional holders reported 79.85% of Merck's outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 0.04%, and other investors, including the public, hold the remaining 20.11%.
A total of 81 Form 4 filings with transactions in Merck stock were made over the past 12 months, by 27 insiders.
Insider figures for MRK include Form 4 filings through October 1, 2026.

Form 4 Holdings

Insiders Holding MRK

Insiders 22

Shares held 1.84Mn

Of outstanding 0.074%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Kenneth C Frazier	Executive Chair	700,653	700,653	38.1%	08 Nov, 2022
2	Robert M Davis	Chairman, Ceo President	450,351	450,351	24.5%	01 May, 2026
3	Richard R. Deluca	Evppres, Merck Animal Heallth	110,167	110,167	6.0%	12 Aug, 2026
4	Dean Y Li	Executive Vp President, Mrl	94,431	94,431	5.1%	01 May, 2026
5	Caroline Litchfield	Evp Cfo	92,301	92,301	5.0%	01 May, 2026
6	Julie L. Gerberding	Evp, Chief Patient Officer	48,712	48,712	2.7%	28 Feb, 2022
7	Rita A Karachun	Sr. Vp Fince Global Controller	45,710	45,710	2.5%	05 May, 2023
8	Jennifer Zachary	Evp, General Counsel	45,509	45,509	2.5%	13 Aug, 2026
9	Chirfi Guindo	Evp, Access, Policy Comms	36,613	36,613	2.0%	13 Aug, 2026
10	David Michael Williams	Evp,Chief Infodigital Officer	31,716	31,716	1.7%	07 Aug, 2026
11	Joseph Romanelli	President, Human Health Int?L	28,739	28,739	1.6%	28 Jan, 2026
12	Michael A Klobuchar	Evp Chief Strategy Officer	23,621	23,621	1.3%	06 May, 2024
13	Steven Mizell	Evp, Chief Hr Officer	23,619	23,619	1.3%	02 Feb, 2024
14	Johannes Jacobus Oosthuizen	Evp, Oncology Int?L	21,895	21,895	1.2%	01 May, 2026
15	David R. Maraldo	Evp Pres. Mmd	18,212	18,212	1.0%	07 Aug, 2026
16	Douglas M Jr Baker	Director	16,000	16,000	0.9%	07 Feb, 2025
17	Sanat Chattopadhyay	Exe V P Pres. Mmd	15,347	15,347	0.8%	01 May, 2026
18	Betty D Larson	Evp, Chief Hr Officer	13,774	13,774	0.7%	01 May, 2026
19	Dalton E. Iii Smart	Svp Fin. Global Controller	9,388	9,388	0.5%	05 May, 2026
20	Lisa Lecointe-Cephas	Svp Chief Ethics Com Officer	5,142	5,142	0.3%	05 May, 2023
21	Inge G Thulin	Director	2,933	2,933	0.2%	07 Feb, 2025
22	Arpa Garay	Svp Human Health Global Mktg.	2,109	2,109	0.1%	05 May, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,336 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
30 Sep, 2026	Surendralal Lanca Karsanbhai	Director	Acquired A	112	$145.31	$16.25K	5,667	Direct
30 Sep, 2026	Christine E Seidman	Director	Acquired A	56	$145.31	$8.12K	21,490	Direct
30 Sep, 2026	Mary Ellen Coe	Director	Acquired A	206	$145.31	$30.00K	32,420	Direct
13 Aug, 2026	Chirfi Guindo	Evp, Access, Policy Comms	Disposed S	10,000	$135.00	$1.35Mn	36,613	Direct
12 Aug, 2026	Jennifer Zachary	Evp, General Counsel	Acquired M	41,494	$117.89	$4.89Mn	112,391	Direct
12 Aug, 2026	Jennifer Zachary	Evp, General Counsel	Acquired M	13,433	$84.71	$1.14Mn	125,824	Direct
12 Aug, 2026	Jennifer Zachary	Evp, General Counsel	Disposed S	80,315	$133.46	$10.72Mn	45,509	Direct
12 Aug, 2026	Jennifer Zachary	Evp, General Counsel	Disposed M	41,494	$0.00	$0	0	Direct
12 Aug, 2026	Jennifer Zachary	Evp, General Counsel	Disposed M	13,433	$0.00	$0	0	Direct
10 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	20,784	$130.43	$2.71Mn	134,703	Direct
11 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	7,410	$131.33	$973.16K	127,293	Direct
11 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	5,427	$132.35	$718.26K	121,866	Direct
12 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	11,099	$131.61	$1.46Mn	110,767	Direct
12 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	600	$132.04	$79.22K	110,167	Direct
06 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	805	$131.02	$105.47K	160,732	Direct
06 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	4,945	$130.23	$643.99K	155,787	Direct
06 Aug, 2026	Richard R. Deluca	Evppres, Merck Animal Heallth	Disposed S	300	$131.02	$39.31K	155,487	Direct
05 Aug, 2026	David Michael Williams	Evp,Chief Infodigital Officer	Acquired M	4,600	$77.62	$357.05K	36,316	Direct
05 Aug, 2026	David R. Maraldo	Evp Pres. Mmd	Acquired M	6,311	$73.73	$465.31K	24,523	Direct
06 Aug, 2026	Chirfi Guindo	Evp, Access, Policy Comms	Disposed S	15,000	$131.00	$1.97Mn	46,613	Direct

Showing 1 to 20 of 3,336 transactions