Walleye Trading LLC Merck & Co., Inc. Transaction History

Walleye Trading LLC

$52.6 Billion
Q2 2025

A detailed history of Walleye Trading LLC transactions in Merck & Co., Inc. stock. As of the latest transaction made, Walleye Trading LLC holds 295,600 shares of MRK stock, worth $25.4 Million. This represents 0.04% of its overall portfolio holdings.

Number of Shares

295,600

Previous 110,821 166.74%

Holding current value

$25.4 Million

Previous $9.95 Million 135.24%

% of portfolio

0.04%

Previous 0.02%

17 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 13, 2025	SELL	$73.47 - $87.12 $2.61 Million - $3.09 Million	-35,508 Reduced 32.04%	75,313 $5.96 Million
Q1 2025 May 14, 2025	BUY	$83.01 - $101.02 $9.2 Million - $11.2 Million	110,821 New	110,821 $9.95 Million
Q3 2024 Nov 14, 2024	SELL	$111.15 - $128.97 $812,728 - $943,028	-7,312 Reduced 12.34%	51,924 $5.9 Million
Q2 2024 Aug 14, 2024	BUY	$123.8 - $132.96 $7.33 Million - $7.88 Million	59,236 New	59,236 $7.33 Million
Q4 2023 Feb 14, 2024	SELL	$100.18 - $109.02 $9.39 Million - $10.2 Million	-93,695 Reduced 68.8%	42,492 $4.63 Million
Q3 2023 Nov 14, 2023	BUY	$102.95 - $114.33 $14 Million - $15.6 Million	136,187 New	136,187 $14 Million
Q4 2022 Feb 14, 2023	SELL	$87.44 - $112.11 $2.09 Million - $2.68 Million	-23,877 Reduced 31.13%	52,830 $5.86 Million
Q3 2022 Nov 14, 2022	BUY	$84.53 - $94.96 $6.48 Million - $7.28 Million	76,707 New	76,707 $6.61 Million
Q4 2021 Feb 14, 2022	SELL	$72.28 - $90.54 $37,874 - $47,442	-524 Reduced 0.4%	129,557 $9.93 Million
Q3 2021 Nov 15, 2021	BUY	$71.68 - $78.83 $8.23 Million - $9.05 Million	114,863 Added 754.78%	130,081 $9.77 Million
Q1 2021 May 17, 2021	SELL	$68.86 - $81.11 $3.03 Million - $3.57 Million	-43,997 Reduced 74.3%	15,218 $1.17 Million
Q4 2020 Feb 16, 2021	BUY	$71.77 - $79.65 $2.39 Million - $2.65 Million	33,241 Added 127.98%	59,215 $4.84 Million
Q2 2018 Aug 14, 2018	SELL	$50.83 - $59.72 $3.68 Million - $4.33 Million	-72,490 Reduced 73.62%	25,974 $1.58 Million
Q1 2018 May 15, 2018	BUY	$50.96 - $59.23 $3.75 Million - $4.36 Million	73,546 Added 295.15%	98,464 $5.36 Million
Q4 2017 Feb 14, 2018	SELL	$51.62 - $61.64 $1.56 Million - $1.86 Million	-30,132 Reduced 54.74%	24,918 $1.4 Million
Q3 2017 Nov 14, 2017	BUY	$58.67 - $63.13 $2.2 Million - $2.36 Million	37,439 Added 212.59%	55,050 $3.53 Million
Q2 2017 Aug 14, 2017	BUY	N/A	17,611	17,611 $1.13 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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Walleye Trading LLC Merck & Co., Inc. Transaction History