CSS LLC/IL

Position in MRK — Merck & Co., Inc.

CIK 1103646 CHICAGO, IL

Back to MRK Full portfolio

Position in MRK

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

Position Value

$1,311,985

-$355,835 QoQ

Shares Held

10,210

-26.4% QoQ

Ownership

0.000%

of shares outstanding

% of Portfolio

0.18%

of 13F equity value

Holder Rank

#1,897

of 3,769 holders

Holding Since

Mar 2020

21 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in MRK Over Time

Shares Held

Position Value (USD)

Derivatives in MRK

reported options exposure · as of Jun 30, 2022

CallValue

$2,279,250

CallShares

25,000

PutValue

$2,279,250

PutShares

25,000

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 Jun 30, 2026

CSS LLC/IL holds $6,263,567 across 6 Drug Manufacturers - General names. MRK ranks #2 (20.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BMY	Bristol Myers Squibb Co	32,320	$1,862,278
2	MRK	Merck & Co., Inc. This page	10,210	$1,311,985
3	SNY	Sanofi	22,970	$979,900
4	PFE	Pfizer Inc	34,351	$827,172
5	OGN	Organon & Co.	48,743	$659,980
6	BIIB	Biogen Inc.	2,880	$622,252

All Filings in MRK

Export CSV

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,311,985	10,210	-26.4%	Shares	Sole	2026-08-14
2026-03-31	$1,667,820	13,865	-12.9%	Shares	Sole	2026-05-15
2025-12-31	$1,676,265	15,925	-9.8%	Shares	Sole	2026-02-17
2025-09-30	$1,481,784	17,655	-23.1%	Shares	Sole	2025-11-13
2025-06-30	$1,817,909	22,965	+29.2%	Shares	Sole	2025-08-14
2025-03-31	$1,595,484	17,775	+10.8%	Shares	Sole	2025-05-15
2024-12-31	$1,596,156	16,045	+43.2%	Shares	Sole	2025-02-18
2024-09-30	$1,272,439	11,205	+67.2%	Shares	Sole	2024-11-14
2024-06-30	$829,460	6,700	-22.9%	Shares	Sole	2024-08-14
2024-03-31	$1,146,381	8,688	-10.3%	Shares	Sole	2024-05-15
2023-12-31	$1,056,185	9,688	+56.6%	Shares	Sole	2024-02-14
2023-09-30	$637,054	6,188	+54.7%	Shares	Sole	2023-11-14
2023-06-30	$461,560	4,000	-11.1%	Shares	Sole	2023-08-14
2023-03-31	$478,755	4,500	+28.6%	Shares	Sole	2023-05-15
2022-12-31	$388,214	3,499	-53.3%	Shares	Sole	2023-02-14
2022-09-30	$645,900	7,500	+50.0%	Shares	Sole	2022-11-14
2022-06-30	$2,279,250	25,000	-66.6%	Call	Sole	2022-08-15
2022-06-30	$2,279,250	25,000	-52.4%	Put	Sole	2022-08-15
2022-03-31	$410,250	5,000	-28.6%	Shares	Sole	2022-05-16
2021-12-31	$536,480	7,000	-67.4%	Shares	Sole	2022-02-14
2020-09-30	$1,782,015	21,483	+2647.2%	Shares	Sole	2020-11-16
2020-09-30	$6,204,662	74,800	—	Call	Sole	2020-11-16
2020-09-30	$4,354,877	52,500	+425.0%	Put	Sole	2020-11-16
2020-03-31	$60,167	782	—	Shares	Sole	2020-05-15
2020-03-31	$769,399	10,000	—	Put	Sole	2020-05-15
No filing history on record for this holder in this stock.