JANE STREET GROUP, LLC

Position in MRK — Merck & Co., Inc.

CIK 1595888 NEW YORK, NY

Back to MRK Full portfolio

Position in MRK

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$42,237,546

+$28,797,214 QoQ

Shares Held

351,131

+175.0% QoQ

Ownership

0.014%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in MRK Over Time

Shares Held

Position Value (USD)

Derivatives in MRK

reported options exposure · as of Mar 31, 2026

CallValue

$465,462,155

CallShares

3,869,500

PutValue

$280,612,512

PutShares

2,332,800

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

JANE STREET GROUP, LLC holds $859,838,957 across 13 Drug Manufacturers - General names. MRK ranks #8 (4.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AZN	Astrazeneca PLC	844,701	$166,591,930
2	BMY	Bristol Myers Squibb Co	2,265,508	$137,403,059
3	LLY	ELI LILLY & Co	115,863	$106,567,309
4	GILD	Gilead Sciences, Inc.	666,637	$92,909,198
5	NVO	Novo Nordisk A S	2,024,007	$74,382,257
6	NVS	Novartis AG	366,467	$55,977,834
7	PFE	Pfizer Inc	1,883,213	$52,880,620
8	MRK	Merck & Co., Inc. This page	351,131	$42,237,546

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	$42,237,546	351,131	-84.9%	Shares	Defined	2026-05-12
2026-03-31	$280,612,512	2,332,800	-39.7%	Put	Defined	2026-05-12
2026-03-31	$465,462,155	3,869,500	+59.1%	Call	Defined	2026-05-12
2025-12-31	$255,981,794	2,431,900	+1804.6%	Put	Defined	2026-02-12
2025-12-31	$13,440,332	127,687	-97.3%	Shares	Defined	2026-02-12
2025-12-31	$497,037,720	4,722,000	+277.5%	Call	Defined	2026-02-12
2025-09-30	$104,979,644	1,250,800	+92.1%	Put	Defined	2025-11-14
2025-09-30	$54,645,479	651,084	-70.7%	Shares	Defined	2025-11-14
2025-09-30	$186,425,316	2,221,200	+26453.5%	Call	Defined	2025-11-14
2025-06-30	$662,172	8,365	-99.7%	Shares	Defined	2025-08-14
2025-06-30	$203,512,444	2,570,900	+8.2%	Put	Defined	2025-08-14
2025-06-30	$188,115,824	2,376,400	+45.2%	Call	Defined	2025-08-14
2025-03-31	$146,937,120	1,637,000	+15.7%	Put	Defined	2025-05-19
2025-03-31	$126,947,568	1,414,300	+272.5%	Call	Defined	2025-05-19
2025-03-31	$34,081,153	379,692	-5.5%	Shares	Defined	2025-05-19
2024-12-31	$39,964,299	401,732	+11.1%	Shares	Defined	2025-02-14
2024-12-31	$35,971,968	361,600	-38.7%	Put	Defined	2025-02-14
2024-12-31	$58,713,096	590,200	+99.8%	Call	Defined	2025-02-14
2024-09-30	$33,545,624	295,400	-74.0%	Put	Defined	2024-11-15
2024-09-30	$128,981,448	1,135,800	+599.3%	Call	Defined	2024-11-15
2024-09-30	$18,443,051	162,408	-93.3%	Shares	Defined	2024-11-15
2024-06-30	$301,381,690	2,434,424	+52.9%	Shares	Defined	2024-08-15
2024-03-31	$210,125,755	1,592,465	+182.5%	Shares	Defined	2024-05-16
2023-12-31	$61,461,550	563,764	+51.0%	Shares	Defined	2024-02-15
2023-09-30	$38,443,794	373,422	+5.1%	Shares	Defined	2023-11-15
2023-06-30	$40,983,873	355,177	-51.8%	Shares	Defined	2023-08-14
2023-03-31	$78,401,237	736,923	+204.7%	Shares	Defined	2023-05-16
2022-12-31	$26,834,366	241,860	+118.2%	Shares	Defined	2023-02-15
2022-09-30	$9,545,282	110,837	-23.1%	Shares	Defined	2022-11-15
2022-06-30	$13,137,688	144,101	-92.7%	Shares	Defined	2022-08-16
2022-03-31	$161,827,215	1,972,300	+304.0%	Call	Defined	2022-05-17
2022-03-31	$40,051,640	488,137	-35.4%	Shares	Defined	2022-05-17
2022-03-31	$62,038,005	756,100	-14.5%	Put	Defined	2022-05-17
2021-12-31	$67,811,072	884,800	+50.5%	Put	Defined	2022-02-15
2021-12-31	$45,069,530	588,068	-66.2%	Shares	Defined	2022-02-15
2021-12-31	$133,506,880	1,742,000	+4.8%	Call	Defined	2022-02-15
2021-09-30	$124,871,350	1,662,513	-26.5%	Shares	Defined	2021-11-16
2021-09-30	$169,981,441	2,263,100	+161.7%	Call	Defined	2021-11-16
2021-09-30	$64,955,128	864,800	-21.7%	Put	Defined	2021-11-16
2021-06-30	$85,905,830	1,104,614	+80.0%	Shares	Defined	2021-08-16
2021-06-30	$47,719,672	613,600	-0.5%	Call	Defined	2021-08-16
2021-06-30	$47,976,313	616,900	-39.5%	Put	Defined	2021-08-16
2021-03-31	$74,978,892	1,019,300	+41.5%	Call	Defined	2021-05-18
2021-03-31	$52,969,979	720,100	-26.2%	Put	Defined	2021-05-18
2021-03-31	$71,743,685	975,319	+130.2%	Shares	Defined	2021-05-18
2020-12-31	$33,064,511	423,614	-69.8%	Shares	Defined	2021-02-17
2020-12-31	$109,469,892	1,402,500	+365.2%	Call	Defined	2021-02-17
2020-12-31	$23,533,100	301,500	-32.3%	Put	Defined	2021-02-17
2020-09-30	$35,237,936	445,200	+100.1%	Put	Defined	2020-11-17
2020-09-30	$17,606,777	222,446	—	Shares	Defined	2020-11-17
No filing history on record for this holder in this stock.