Marshall Wace, LLP Merck & Co., Inc. Transaction History

Marshall Wace, LLP

$81.7 Billion
Q2 2025

A detailed history of Marshall Wace, LLP transactions in Merck & Co., Inc. stock. As of the latest transaction made, Marshall Wace, LLP holds 3,144,500 shares of MRK stock, worth $270 Million. This represents 0.3% of its overall portfolio holdings.

Number of Shares

3,144,500

Previous 7,607 41236.93%

Holding current value

$270 Million

Previous $682,000 36398.24%

% of portfolio

0.3%

Previous 0.0%

27 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 13, 2025	BUY	$73.47 - $87.12 $230 Million - $273 Million	3,136,893 Added 41236.93%	3,144,500 $249 Million
Q1 2025 May 15, 2025	BUY	$83.01 - $101.02 $603,980 - $735,021	7,276 Added 2198.19%	7,607 $682,000
Q4 2024 Feb 13, 2025	SELL	$96.31 - $114.76 $291,722 - $347,608	-3,029 Reduced 90.15%	331 $32,000
Q3 2024 Nov 14, 2024	SELL	$111.15 - $128.97 $287 Million - $333 Million	-2,580,823 Reduced 99.87%	3,360 $381,000
Q2 2024 Aug 14, 2024	BUY	$123.8 - $132.96 $78.5 Million - $84.3 Million	634,194 Added 32.52%	2,584,183 $320 Million
Q1 2024 May 15, 2024	SELL	$113.24 - $131.95 $231 Million - $269 Million	-2,039,971 Reduced 51.13%	1,949,989 $257 Million
Q4 2023 Feb 14, 2024	BUY	$100.18 - $109.02 $194 Million - $211 Million	1,938,555 Added 94.5%	3,989,960 $435 Million
Q3 2023 Nov 14, 2023	BUY	$102.95 - $114.33 $193 Million - $214 Million	1,875,318 Added 1065.0%	2,051,405 $211 Million
Q2 2023 Aug 14, 2023	BUY	$108.61 - $118.38 $19.1 Million - $20.8 Million	176,087 New	176,087 $20.3 Million
Q4 2022 Feb 14, 2023	BUY	$87.44 - $112.11 $32.6 Million - $41.8 Million	372,519 Added 56.33%	1,033,806 $115 Million
Q3 2022 Nov 14, 2022	SELL	$84.53 - $94.96 $435 Million - $488 Million	-5,140,458 Reduced 88.6%	661,287 $57 Million
Q2 2022 Aug 15, 2022	SELL	$83.49 - $94.64 $82.1 Million - $93.1 Million	-983,823 Reduced 14.5%	5,801,745 $529 Million
Q1 2022 May 16, 2022	BUY	$73.51 - $82.4 $496 Million - $556 Million	6,746,481 Added 17260.17%	6,785,568 $557 Million
Q4 2021 Feb 14, 2022	BUY	$72.28 - $90.54 $2.64 Million - $3.31 Million	36,573 Added 1454.77%	39,087 $3 Million
Q3 2021 Nov 15, 2021	BUY	$71.68 - $78.83 $180,203 - $198,178	2,514 New	2,514 $189,000
Q1 2021 May 17, 2021	SELL	$68.86 - $81.11 $3.73 Million - $4.39 Million	-54,136 Closed	0 $0
Q4 2020 Feb 16, 2021	SELL	$71.77 - $79.65 $14.8 Million - $16.5 Million	-206,854 Reduced 79.26%	54,136 $4.43 Million
Q3 2020 Nov 16, 2020	BUY	$73.18 - $82.95 $7.13 Million - $8.08 Million	97,378 Added 59.52%	260,990 $21.7 Million
Q2 2020 Aug 13, 2020	SELL	$70.42 - $80.13 $11.1 Million - $12.7 Million	-158,205 Reduced 49.16%	163,612 $12.7 Million
Q1 2020 May 15, 2020	SELL	$63.36 - $87.82 $2.07 Million - $2.87 Million	-32,736 Reduced 9.23%	321,817 $24.8 Million
Q4 2019 Feb 14, 2020	BUY	$77.58 - $87.54 $11.5 Million - $13 Million	147,992 Added 71.65%	354,553 $32.2 Million
Q3 2019 Nov 14, 2019	SELL	$76.08 - $82.93 $19.6 Million - $21.4 Million	-257,708 Reduced 55.51%	206,561 $17.4 Million
Q2 2019 Aug 14, 2019	BUY	$69.84 - $81.59 $17.1 Million - $19.9 Million	244,145 Added 110.91%	464,269 $38.9 Million
Q1 2019 May 14, 2019	BUY	$69.58 - $79.36 $5.99 Million - $6.84 Million	86,159 Added 64.31%	220,124 $18.3 Million
Q4 2018 Feb 14, 2019	BUY	$65.24 - $75.71 $4.62 Million - $5.37 Million	70,868 Added 112.32%	133,965 $10.2 Million
Q3 2018 Nov 14, 2018	BUY	$57.69 - $67.84 $1.71 Million - $2.01 Million	29,699 Added 88.92%	63,097 $4.48 Million
Q2 2018 Aug 14, 2018	BUY	$50.83 - $59.72 $1.7 Million - $1.99 Million	33,398 New	33,398 $2.03 Million

Others Institutions Holding MRK

# of Institutions

3,842

Shares Held

1.96B

Call Options Held

29.2M

Put Options Held

30M

View Full List

About Merck & Co., Inc.

Ticker MRK
Exchange NYSE
Sector Healthcare
Industry Drug Manufacturers—General
Shares Outstandng 2,533,280,000
Market Cap $218B
Description
Merck & Co., Inc. operates as a healthcare company worldwide. It operates through two segments, Pharmaceutical and Animal Health. The Pharmaceutical segment offers human health pharmaceutical products in the areas of oncology, hospital acute care, immunology, neuroscience, virology, cardiovascular, and diabetes, as well as vaccine products, ...

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Marshall Wace, LLP Merck & Co., Inc. Transaction History