Sei Investments CO Merck & Co., Inc. Transaction History

Sei Investments CO

$89.6 Billion
Q3 2025

A detailed history of Sei Investments CO transactions in Merck & Co., Inc. stock. As of the latest transaction made, Sei Investments CO holds 1,753,537 shares of MRK stock, worth $163 Million. This represents 0.16% of its overall portfolio holdings.

Number of Shares

1,753,537

Previous 1,604,142 9.31%

Holding current value

$163 Million

Previous $127 Million 15.9%

% of portfolio

0.16%

Previous 0.15%

36 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 13, 2025	BUY	$77.6 - $87.37 $11.6 Million - $13.1 Million	149,395 Added 9.31%	1,753,537 $147 Million
Q2 2025 Aug 14, 2025	SELL	$73.47 - $87.12 $13.8 Million - $16.4 Million	-187,799 Reduced 10.48%	1,604,142 $127 Million
Q1 2025 May 14, 2025	BUY	$83.01 - $101.02 $8.19 Million - $9.97 Million	98,649 Added 5.83%	1,791,941 $161 Million
Q1 2025 May 13, 2025	BUY	$83.01 - $101.02 $2.42 Million - $2.95 Million	29,198 Added 1.75%	1,693,292 $152 Million
Q4 2024 Feb 11, 2025	SELL	$96.31 - $114.76 $10.6 Million - $12.6 Million	-109,664 Reduced 6.18%	1,664,094 $166 Million

Q3 2024 Nov 12, 2024	BUY	$111.15 - $128.97 $21.1 Million - $24.4 Million	189,549 Added 11.96%	1,773,758 $201 Million
Q2 2024 Aug 13, 2024	BUY	$123.8 - $132.96 $3.49 Million - $3.75 Million	28,185 Added 1.81%	1,584,209 $196 Million
Q1 2024 May 07, 2024	BUY	$113.24 - $131.95 $8.32 Million - $9.7 Million	73,490 Added 4.96%	1,556,024 $205 Million
Q4 2023 Feb 14, 2024	SELL	$100.18 - $109.02 $3.51 Million - $3.81 Million	-34,991 Reduced 2.31%	1,482,534 $162 Million
Q3 2023 Nov 14, 2023	BUY	$102.95 - $114.33 $1.11 Million - $1.23 Million	10,763 Added 0.71%	1,517,525 $156 Million
Q2 2023 Aug 11, 2023	SELL	$108.61 - $118.38 $9.56 Million - $10.4 Million	-88,013 Reduced 5.52%	1,506,762 $174 Million
Q1 2023 May 12, 2023	BUY	$102.94 - $114.86 $22.6 Million - $25.2 Million	219,647 Added 15.97%	1,594,775 $170 Million
Q4 2022 Feb 10, 2023	SELL	$87.44 - $112.11 $11.9 Million - $15.3 Million	-136,468 Reduced 9.03%	1,375,128 $153 Million
Q3 2022 Nov 14, 2022	BUY	$84.53 - $94.96 $32.3 Million - $36.3 Million	382,622 Added 33.89%	1,511,596 $130 Million
Q2 2022 Aug 15, 2022	BUY	$83.49 - $94.64 $18.7 Million - $21.2 Million	223,541 Added 24.69%	1,128,974 $103 Million
Q1 2022 May 13, 2022	BUY	$73.51 - $82.4 $3.41 Million - $3.83 Million	46,428 Added 5.4%	905,433 $74.2 Million
Q4 2021 Feb 14, 2022	BUY	$72.28 - $90.54 $2.87 Million - $3.6 Million	39,756 Added 4.85%	859,005 $65.8 Million
Q3 2021 Nov 12, 2021	SELL	$71.68 - $78.83 $13.4 Million - $14.8 Million	-187,208 Reduced 18.6%	819,249 $61.5 Million
Q2 2021 Aug 06, 2021	SELL	$70.31 - $77.77 $970,910 - $1.07 Million	-13,809 Reduced 1.35%	1,006,457 $78.2 Million
Q1 2021 May 12, 2021	BUY	$68.86 - $81.11 $622,425 - $733,153	9,039 Added 0.89%	1,020,266 $80.7 Million
Q4 2020 Feb 08, 2021	SELL	$71.77 - $79.65 $3.03 Million - $3.37 Million	-42,271 Reduced 4.01%	1,011,227 $82.7 Million
Q3 2020 Dec 04, 2020	SELL	$73.18 - $82.95 $3.04 Million - $3.45 Million	-41,553 Reduced 3.79%	1,053,498 $87.2 Million
Q3 2020 Nov 06, 2020	SELL	$73.18 - $82.95 $25.2 Million - $28.5 Million	-343,845 Reduced 23.9%	1,095,051 $90.7 Million
Q2 2020 Aug 17, 2020	SELL	$70.42 - $80.13 $2.52 Million - $2.87 Million	-35,827 Reduced 2.43%	1,438,896 $111 Million
Q2 2020 Aug 11, 2020	BUY	$70.42 - $80.13 $11 Million - $12.5 Million	156,208 Added 11.85%	1,474,723 $125 Million
Q1 2020 May 14, 2020	BUY	$63.36 - $87.82 $2.37 Million - $3.29 Million	37,413 Added 2.92%	1,318,515 $101 Million
Q4 2019 Feb 06, 2020	SELL	$77.58 - $87.54 $5.56 Million - $6.27 Million	-71,659 Reduced 5.3%	1,281,102 $116 Million
Q3 2019 Nov 12, 2019	BUY	$76.08 - $82.93 $21.8 Million - $23.8 Million	287,162 Added 26.95%	1,352,761 $254 Million
Q2 2019 Aug 14, 2019	BUY	$69.84 - $81.59 $4.94 Million - $5.77 Million	70,679 Added 7.1%	1,065,599 $89.4 Million
Q1 2019 May 15, 2019	BUY	$69.58 - $79.36 $4.33 Million - $4.94 Million	62,297 Added 6.68%	994,920 $82.8 Million
Q4 2018 Feb 13, 2019	BUY	$65.24 - $75.71 $10.4 Million - $12 Million	158,692 Added 20.5%	932,623 $68.1 Million
Q3 2018 Nov 08, 2018	SELL	$57.69 - $67.84 $14.5 Million - $17 Million	-250,634 Reduced 24.46%	773,931 $54.8 Million
Q2 2018 Aug 03, 2018	SELL	$50.83 - $59.72 $7.03 Million - $8.26 Million	-138,263 Reduced 11.89%	1,024,565 $62.2 Million
Q1 2018 May 11, 2018	SELL	$50.96 - $59.23 $2.29 Million - $2.66 Million	-44,881 Reduced 3.72%	1,162,828 $63.3 Million
Q4 2017 Feb 08, 2018	SELL	$51.62 - $61.64 $1.34 Million - $1.6 Million	-25,897 Reduced 2.1%	1,207,709 $68 Million
Q3 2017 Nov 06, 2017	BUY	$58.67 - $63.13 $72.4 Million - $77.9 Million	1,233,606	1,233,606 $79 Million

Others Institutions Holding MRK

# of Institutions

3,875

Shares Held

1.9B

Call Options Held

30.1M

Put Options Held

27.7M

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 $235B
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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Sei Investments CO Merck & Co., Inc. Transaction History