BARCLAYS PLC

Position in MRK — Merck & Co., Inc.

CIK 312069 LONDON, X0

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Position in MRK

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$909,093,835

+$406,615,650 QoQ

Shares Held

7,557,518

+58.3% QoQ

Ownership

0.306%

of shares outstanding

% of Portfolio

0.40%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 99.37523139210519.ToString("F0")% Shared 0.ToString("F0")% None 0.6247686078948141.ToString("F0")%

Common Shares in MRK Over Time

Shares Held

Position Value (USD)

Derivatives in MRK

reported options exposure · as of Dec 31, 2025

CallValue

$497,048,246

CallShares

4,722,100

PutValue

$4,641,966

PutShares

44,100

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Drug Manufacturers - General

Healthcare · as of Mar 31, 2026

BARCLAYS PLC holds $8,691,009,698 across 16 Drug Manufacturers - General names. MRK ranks #5 (10.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	JNJ	Johnson & Johnson	6,786,107	$1,658,795,994
2	LLY	ELI LILLY & Co	1,563,625	$1,438,175,365
3	ABBV	AbbVie Inc.	5,571,610	$1,211,769,456
4	AZN	Astrazeneca PLC	5,491,992	$1,083,130,660
5	MRK	Merck & Co., Inc. This page	7,557,518	$909,093,835
6	GILD	Gilead Sciences, Inc.	5,282,196	$736,179,654
7	AMGN	Amgen Inc	1,529,613	$538,194,332
8	PFE	Pfizer Inc	14,689,187	$412,472,368

All Filings in MRK

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50 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$909,093,835	7,557,518	+17037.2%	Shares	Defined	2026-05-15
2025-12-31	$4,641,966	44,100	-99.1%	Put	Sole	2026-02-13
2025-12-31	$497,048,246	4,722,100	-1.1%	Call	Sole	2026-02-13
2025-12-31	$502,478,185	4,773,686	-36.5%	Shares	Sole	2026-02-13
2025-09-30	$630,556,603	7,512,887	+1038.0%	Shares	Defined	2026-03-31
2025-09-30	$55,410,586	660,200	+1819.2%	Call	Sole	2026-03-31
2025-09-30	$2,887,192	34,400	-31.6%	Put	Sole	2026-03-31
2025-06-30	$3,981,748	50,300	+185.8%	Call	Sole	2026-02-27
2025-06-30	$1,393,216	17,600	-99.7%	Put	Sole	2026-02-27
2025-06-30	$466,724,824	5,895,968	+0.7%	Shares	Defined	2026-02-27
2025-03-31	$525,711,032	5,856,852	+2242.7%	Shares	Defined	2026-03-17
2025-03-31	$22,440,000	250,000	+107.0%	Call	Sole	2026-03-17
2025-03-31	$10,843,008	120,800	+2416.7%	Put	Sole	2026-03-17
2024-12-31	$477,504	4,800	-99.9%	Call	Sole	2026-03-19
2024-12-31	$643,238,771	6,466,011	+4301.6%	Shares	Defined	2026-03-19
2024-12-31	$14,613,612	146,900	+2960.4%	Put	Sole	2026-03-19
2024-09-30	$545,088	4,800	-99.9%	Call	Sole	2026-03-31
2024-09-30	$782,153,013	6,887,575	+4504.0%	Shares	Defined	2026-03-31
2024-09-30	$16,988,576	149,600	-98.1%	Put	Sole	2026-03-31
2024-06-30	$995,949,209	8,044,824	+5110.4%	Shares	Sole	2026-03-23
2024-06-30	$19,114,720	154,400	+117.8%	Call	Sole	2026-03-23
2024-03-31	$9,355,255	70,900	-2.7%	Put	Sole	2026-03-24
2024-03-31	$9,619,155	72,900	-99.2%	Call	Sole	2026-03-24
2024-03-31	$1,144,244,932	8,671,807	+5981.2%	Shares	Sole	2026-03-24
2023-12-31	$15,546,252	142,600	-97.4%	Call	Sole	2026-03-24
2023-12-31	$596,920,583	5,475,331	+3926.0%	Shares	Defined	2026-03-24
2023-12-31	$14,826,720	136,000	-98.0%	Put	Sole	2026-03-24
2023-09-30	$695,250,482	6,753,283	-6.9%	Shares	Sole	2026-03-26
2023-06-30	$837,144,524	7,254,914	+2030.0%	Shares	Defined	2026-03-27
2023-03-31	$36,236,434	340,600	+4.5%	Put	Sole	2026-03-30
2023-03-31	$34,672,501	325,900	-87.3%	Call	Sole	2026-03-30
2023-03-31	$272,848,855	2,564,610	+706.5%	Shares	Defined	2026-03-30
2022-12-31	$35,282,100	318,000	-96.1%	Call	Sole	2026-03-30
2022-12-31	$908,106,663	8,184,828	+1280.7%	Shares	Defined	2026-03-30
2022-12-31	$65,771,160	592,800	+107.7%	Put	Sole	2026-03-30
2022-09-30	$24,578,648	285,400	+415.2%	Put	Sole	2022-11-03
2022-09-30	$4,771,048	55,400	-98.7%	Call	Sole	2022-11-03
2022-09-30	$367,968,107	4,272,737	+54.7%	Shares	Defined	2022-11-03
2022-06-30	$251,761,485	2,761,451	+20507.8%	Shares	Defined	2022-08-12
2022-06-30	$1,221,678	13,400	-86.2%	Call	Sole	2022-08-12
2022-06-30	$8,879,958	97,400	+175.1%	Put	Sole	2022-08-12
2022-03-31	$2,904,570	35,400	-99.2%	Put	Sole	2022-05-16
2022-03-31	$348,949,540	4,252,889	-50.9%	Shares	Sole	2022-05-16
2021-12-31	$663,373,995	8,655,715	+19438.9%	Shares	Sole	2022-02-23
2021-12-31	$3,395,152	44,300	-90.5%	Put	Sole	2022-02-23
2021-12-31	$35,675,920	465,500	-93.0%	Call	Sole	2022-02-23
2021-09-30	$502,783,784	6,693,966	+4510.2%	Shares	Defined	2021-11-09
2021-09-30	$10,905,972	145,200	+153.4%	Put	Sole	2021-11-09
2021-09-30	$4,303,803	57,300	-98.8%	Call	Sole	2021-11-09
2021-06-30	$366,186,965	4,708,589	—	Shares	Sole	2021-08-13
No filing history on record for this holder in this stock.