PRIMECAP MANAGEMENT CO/CA/

Position in MRK — Merck & Co., Inc.

CIK 763212 PASADENA, CA

Position in MRK

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$4,587,450

+$269,039 QoQ

Shares Held

35,700

-0.6% QoQ

Ownership

0.001%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#1,090

of 3,778 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

PRIMECAP MANAGEMENT CO/CA/ holds $23,952,609,496 across 9 Drug Manufacturers - General names. MRK ranks #8 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LLY	ELI LILLY & Co	9,172,904	$11,002,257,162
2	AZN	Astrazeneca PLC	18,095,178	$3,431,207,652
3	BIIB	Biogen Inc.	15,154,606	$3,274,304,172
4	AMGN	Amgen Inc	6,756,962	$2,446,831,079
5	BMY	Bristol Myers Squibb Co	24,923,900	$1,436,115,118
6	GSK	GSK plc	25,182,068	$1,320,044,004
7	NVS	Novartis AG	6,592,124	$1,033,117,673
8	MRK	Merck & Co., Inc. This page	35,700	$4,587,450

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$4,587,450	35,700	-0.6%	Shares	Sole	2026-08-14
2026-03-31	$4,318,411	35,900	-5.5%	Shares	Sole	2026-05-11
2025-12-31	$3,999,880	38,000	-17.4%	Shares	Sole	2026-02-11
2025-09-30	$3,860,780	46,000	-11.4%	Shares	Sole	2025-11-12
2025-06-30	$4,108,404	51,900	-9.7%	Shares	Sole	2025-08-11
2025-03-31	$5,161,200	57,500	-4.8%	Shares	Sole	2025-05-09
2024-12-31	$6,008,592	60,400	-9.6%	Shares	Sole	2025-02-10
2024-09-30	$7,585,808	66,800	-8.2%	Shares	Sole	2024-11-08
2024-06-30	$9,012,640	72,800	-4.2%	Shares	Sole	2024-08-09
2024-03-31	$10,028,200	76,000	-10.1%	Shares	Sole	2024-05-14
2023-12-31	$9,212,190	84,500	-9.1%	Shares	Sole	2024-02-09
2023-09-30	$9,574,350	93,000	-3.2%	Shares	Sole	2023-11-13
2023-06-30	$11,088,979	96,100	-4.8%	Shares	Sole	2023-08-11
2023-03-31	$10,734,751	100,900	-6.1%	Shares	Sole	2023-05-15
2022-12-31	$11,916,030	107,400	-7.8%	Shares	Sole	2023-02-13
2022-09-30	$10,032,980	116,500	-13.6%	Shares	Sole	2022-11-14
2022-06-30	$12,298,833	134,900	-4.7%	Shares	Sole	2022-08-11
2022-03-31	$11,618,280	141,600	-41.9%	Shares	Sole	2022-05-11
2021-12-31	$18,677,168	243,700	-52.4%	Shares	Sole	2022-02-11
2021-09-30	$38,486,364	512,400	-1.6%	Shares	Sole	2021-11-12
2021-06-30	$40,494,839	520,700	-55.5%	Shares	Sole	2021-08-10
2021-03-31	$90,303,274	1,171,400	-52.8%	Shares	Sole	2021-05-14
2020-12-31	$203,011,148	2,481,800	-6.0%	Shares	Sole	2021-02-08
2020-09-30	$219,021,281	2,640,400	-6.1%	Shares	Sole	2020-11-13
2020-06-30	$217,490,719	2,812,500	-9.4%	Shares	Sole	2020-08-13
2020-03-31	$238,752,414	3,103,100	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.