MRK

MERCK & CO. INC.

Data as of 2026 Q2 (06-30) · 13F snapshot

Summary

MERCK & CO. INC. (MRK) is held as common stock by 7 tracked hedge-fund managers, with a combined reported value of ~$1.33B; the largest are Jeremy Grantham, Ken Griffin, Izzy Englander. 4 tracked managers also disclosed PUT or CALL positions, reported separately below. This quarter: 1 new, 1 added, 4 trimmed. 20 public STOCK Act / OGE trade disclosures are on record. Data as of 2026 Q2, from public SEC 13F filings, delayed up to ~45 days.

Attention · MediumThis quarter · Cooling

Common-stock holders74 also report options

Congress trades20

Price$148.69vs quarter-end+15.71%

Sectors2

This quarter's moves

New1

Added1

Trimmed / sold4

Top holderJeremy Grantham

Common-stock positions

PUT and CALL disclosures are excluded from these holder counts and values.

Dodge & CoxHold

Value $17.44M0.0% of portfolio135,7502026 Q2

Investor	Period	Value	Shares	% of portfolio	Action
Dodge & Cox	2026 Q2	$17.44M	135,750	0.0%	Hold

PUT / CALL disclosures

Reported separately: 13F option values are not common-stock ownership and do not reveal the full strategy or economic exposure.

Ken GriffinPUT—

Value $482.76M— of portfolio3,756,9002026 Q2

Ken GriffinCALL—

Value $447.91M— of portfolio3,485,7002026 Q2

Izzy EnglanderPUT—

Value $156.87M— of portfolio1,220,8002026 Q2

Izzy EnglanderCALL—

Value $42.70M— of portfolio332,3002026 Q2

Paul Tudor JonesCALL—

Value $39.42M— of portfolio306,8002026 Q2

Steven CohenCALL—

Value $13.16M— of portfolio102,4002026 Q2

Steven CohenPUT—

Value $9.02M— of portfolio70,2002026 Q2

Paul Tudor JonesPUT—

Value $7.90M— of portfolio61,5002026 Q2

Investor	Period	Value	Shares	% of portfolio	Action
Ken GriffinPUT	2026 Q2	$482.76M	3,756,900	—	—
Ken GriffinCALL	2026 Q2	$447.91M	3,485,700	—	—
Izzy EnglanderPUT	2026 Q2	$156.87M	1,220,800	—	—
Izzy EnglanderCALL	2026 Q2	$42.70M	332,300	—	—
Paul Tudor JonesCALL	2026 Q2	$39.42M	306,800	—	—
Steven CohenCALL	2026 Q2	$13.16M	102,400	—	—
Steven CohenPUT	2026 Q2	$9.02M	70,200	—	—
Paul Tudor JonesPUT	2026 Q2	$7.90M	61,500	—	—

Insider Trading

Officers · directors · Form 4

Open-market purchases and sales (P/S)17

Chirfi Guindo
EVP, Access, Policy & Comms
Sell$1.35M
10,000 @ $135.00Traded 2026-08-13Filed 2026-08-13
Jennifer Zachary
EVP, General Counsel
Sell$10.72M
80,315 @ $133.46Traded 2026-08-12Filed 2026-08-13
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$973.2K
7,410 @ $131.33Traded 2026-08-10Filed 2026-08-12
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$718.3K
5,427 @ $132.35Traded 2026-08-10Filed 2026-08-12
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$79.2K
600 @ $132.04Traded 2026-08-10Filed 2026-08-12
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$2.71M
20,784 @ $130.43Traded 2026-08-10Filed 2026-08-12
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$1.46M
11,099 @ $131.61Traded 2026-08-10Filed 2026-08-12
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$39.3K
300 @ $131.02Traded 2026-08-06Filed 2026-08-10
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$105.5K
805 @ $131.02Traded 2026-08-06Filed 2026-08-10
Richard R. Deluca
EVP&Pres, Merck Animal Heallth
Sell$644.0K
4,945 @ $130.23Traded 2026-08-06Filed 2026-08-10
Chirfi Guindo
EVP, Access, Policy & Comms
Sell$1.97M
15,000 @ $131.00Traded 2026-08-06Filed 2026-08-07
David Michael Williams
EVP,Chief Info&Digital Officer
Sell$592.3K
4,600 @ $128.77Traded 2026-08-05Filed 2026-08-07
David Michael Williams
EVP,Chief Info&Digital Officer
Sell$1.74M
13,542 @ $128.77Traded 2026-08-05Filed 2026-08-07
David R. Maraldo
EVP & Pres. MMD
Sell$345.7K
2,686 @ $128.72Traded 2026-08-05Filed 2026-08-07
David R. Maraldo
EVP & Pres. MMD
Sell$812.3K
6,311 @ $128.72Traded 2026-08-05Filed 2026-08-07
David R. Maraldo
EVP & Pres. MMD
Sell$1.25M
9,709 @ $128.72Traded 2026-08-05Filed 2026-08-07
David Michael Williams
EVP,Chief Info&Digital Officer
Sell$4.47M
34,705 @ $128.77Traded 2026-08-05Filed 2026-08-07

Insider transactions are public SEC Form 4 disclosures (company officers, directors, 10% owners), for research only — not investment advice.

Public SEC 13F filings may appear up to 45 days after quarter-end; STOCK Act / OGE trade filings are generally due within 45 days but may be late. Partial data only — research, not investment advice.