Merck & Co. (MRK) Shares Outstanding: History & Chart

Merck & Co., Inc.(MRK)

Drug Manufacturers - General · Rahway, NJ

$148.64-1.69 (-1.12%)

Delayed quote: Sep 8, 2026, 2:55 PM EDT

About Merck & Co., Inc.

Merck & Co., Inc. is a global healthcare leader with operations spanning two core divisions: Pharmaceuticals and Animal Health. The Pharmaceutical segment is dedicated to human health, offering a broad spectrum of medicinal products. These cover crucial therapeutic areas such as oncology, acute hospital care, immunology, neuroscience, virology, cardiovascular conditions, and diabetes. This division also develops vital preventive vaccines for pediatric, adolescent, and adult populations. Meanwhile, the Animal Health segment focuses on the research, development, manufacturing, and marketing of veterinary medications, vaccines, and comprehensive health management solutions for animals. This division further provides innovative digital products designed for animal identification, traceability, and continuous monitoring. Merck's extensive clientele encompasses drug wholesalers, pharmacies, hospitals, and government agencies. It also serves managed healthcare organizations, including health maintenance organizations (HMOs) and pharmacy benefit managers, as well as various other institutional clients. Additionally, the company supplies products to individual physicians and their distributors, veterinarians, and livestock producers. The organization actively engages in strategic collaborations with companies such as AstraZeneca PLC, Bayer AG, Eisai Co., Ltd., Ridgeback Biotherapeutics, and Gilead Sciences, Inc. These partnerships are specifically aimed at the joint development and commercialization of prolonged-acting therapies for HIV. Established in 1891, Merck & Co., Inc. maintains its corporate headquarters in Kenilworth, New Jersey.

Rahway, NJ

74,000 employees

www.merck.com

Healthcare / Drug Manufacturers - General

Sector: Healthcare
Industry: Drug Manufacturers - General
CEO: Robert Davis

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MRK Shares Outstanding Metrics

SHARES OUTSTANDING

2.47B

SHARES OUTSTANDING AVG TTM

2.49B

SHARES OUTSTANDING AVG 3Y

2.52B

SHARES OUTSTANDING AVG 5Y

2.54B

SHARES OUTSTANDING AVG 10Y

2.58B

SHARES OUTSTANDING AVG 15Y

2.71B

SHARES OUTSTANDING AVG 20Y

2.63B

CURRENT VS TTM AVG

-0.67%

CURRENT VS 3Y AVG

-1.97%

CURRENT VS 5Y AVG

-2.68%

CURRENT VS 10Y AVG

-4.16%

CURRENT VS 15Y AVG

-8.93%

CURRENT VS 20Y AVG

-6.17%

Period	Weighted Average Shares	QoQ Change
Quarter ended Jun 2026	2.47B	+0.00%
Quarter ended Mar 2026	2.47B	-0.64%
Quarter ended Dec 2025	2.49B	-0.40%
Quarter ended Sep 2025	2.50B	-0.60%

Period

Weighted Average Shares

QoQ Change

Quarter ended Jun 2026

2.47B

+0.00%

Quarter ended Mar 2026

2.47B

-0.64%

Quarter ended Dec 2025

2.49B

-0.40%

Quarter ended Sep 2025

2.50B

-0.60%

Shares Outstanding FAQ

What is the shares outstanding for Merck & Co., Inc. (MRK)?

The shares outstanding for MRK stock is 2.47B.

What is the TTM average shares outstanding for Merck & Co., Inc. (MRK)?

The TTM average shares outstanding for MRK stock is 2.49B.

What is the 3Y average shares outstanding for Merck & Co., Inc. (MRK)?

The 3Y average shares outstanding for MRK stock is 2.52B.

What is the 5Y average shares outstanding for Merck & Co., Inc. (MRK)?

The 5Y average shares outstanding for MRK stock is 2.54B.

What is the 10Y average shares outstanding for Merck & Co., Inc. (MRK)?

The 10Y average shares outstanding for MRK stock is 2.58B.

What is the 15Y average shares outstanding for Merck & Co., Inc. (MRK)?

The 15Y average shares outstanding for MRK stock is 2.71B.

What is the 20Y average shares outstanding for Merck & Co., Inc. (MRK)?

The 20Y average shares outstanding for MRK stock is 2.63B.

DATE	SHARES OUTSTANDING
2026-06-30	2.47B
2026-03-31	2.47B
2025-12-31	2.49B
2025-09-30	2.50B
2025-06-30	2.51B
2025-03-31	2.53B
2024-12-31	2.54B
2024-09-30	2.54B
2024-06-30	2.54B
2024-03-31	2.54B
2023-12-31	2.55B
2023-09-30	2.55B
2023-06-30	2.54B
2023-03-31	2.55B
2022-12-31	2.55B
2022-09-30	2.54B
2022-06-30	2.54B
2022-03-31	2.54B
2021-12-31	2.54B
2021-09-30	2.54B
2021-06-30	2.54B
2021-03-31	2.54B
2020-12-31	2.54B
2020-09-30	2.54B
2020-06-30	2.54B
2020-03-31	2.55B
2019-12-31	2.56B
2019-09-30	2.57B
2019-06-30	2.59B
2019-03-31	2.60B
2018-12-31	2.63B
2018-09-30	2.68B
2018-06-30	2.70B
2018-03-31	2.71B
2017-12-31	2.71B
2017-09-30	2.73B
2017-06-30	2.75B
2017-03-31	2.77B
2016-12-31	2.78B
2016-09-30	2.79B
2016-06-30	2.79B
2016-03-31	2.79B
2015-12-31	2.81B
2015-09-30	2.84B
2015-06-30	2.85B
2015-03-31	2.87B
2014-12-31	2.88B
2014-09-30	2.91B
2014-06-30	2.95B
2014-03-31	2.97B
2013-12-31	2.96B
2013-09-30	2.96B
2013-06-30	3.01B
2013-03-31	3.05B
2012-12-31	3.07B
2012-09-30	3.07B
2012-06-30	3.07B
2012-03-31	3.07B
2011-12-31	3.07B
2011-09-30	3.09B
2011-06-30	3.11B
2011-03-31	3.10B
2010-12-31	3.08B
2010-09-30	3.10B
2010-06-30	3.13B
2010-03-31	3.14B
2009-12-31	2.11B
2009-09-30	2.11B
2009-06-30	2.11B
2009-03-31	2.11B
2008-12-31	2.13B
2008-09-30	2.13B
2008-06-30	2.15B
2008-03-31	2.16B
2007-12-31	2.18B
2007-09-30	2.18B
2007-06-30	2.18B
2007-03-31	2.19B
2006-12-31	2.18B
2006-09-30	2.19B
2006-06-30	2.17B
2006-03-31	2.19B
2005-12-31	2.19B
2005-09-30	2.20B
2005-06-30	2.21B
2005-03-31	2.21B
2004-12-31	2.22B
2004-09-30	2.23B
2004-06-30	2.23B
2004-03-31	2.23B
2003-12-31	2.24B
2003-09-30	2.25B
2003-06-30	2.26B
2003-03-31	2.26B
2002-12-31	2.25B
2002-09-30	2.27B

DATE

SHARES OUTSTANDING

2026-06-30

2.47B

2026-03-31

2.47B

2025-12-31

2.49B

2025-09-30

2.50B

2025-06-30

2.51B

2025-03-31

2.53B

2024-12-31

2.54B

2024-09-30

2.54B

2024-06-30

2.54B

2024-03-31

2.54B

2023-12-31

2.55B

2023-09-30

2.55B

2023-06-30

2.54B

2023-03-31

2.55B

2022-12-31

2.55B

2022-09-30

2.54B

2022-06-30

2.54B

2022-03-31

2.54B

2021-12-31

2.54B

2021-09-30

2.54B

2021-06-30

2.54B

2021-03-31

2.54B

2020-12-31

2.54B

2020-09-30

2.54B

2020-06-30

2.54B

2020-03-31

2.55B

2019-12-31

2.56B

2019-09-30

2.57B

2019-06-30

2.59B

2019-03-31

2.60B

2018-12-31

2.63B

2018-09-30

2.68B

2018-06-30

2.70B

2018-03-31

2.71B

2017-12-31

2.71B

2017-09-30

2.73B

2017-06-30

2.75B

2017-03-31

2.77B

2016-12-31

2.78B

2016-09-30

2.79B

2016-06-30

2.79B

2016-03-31

2.79B

2015-12-31

2.81B

2015-09-30

2.84B

2015-06-30

2.85B

2015-03-31

2.87B

2014-12-31

2.88B

2014-09-30

2.91B

2014-06-30

2.95B

2014-03-31

2.97B

2013-12-31

2.96B

2013-09-30

2.96B

2013-06-30

3.01B

2013-03-31

3.05B

2012-12-31

3.07B

2012-09-30

3.07B

2012-06-30

3.07B

2012-03-31

3.07B

2011-12-31

3.07B

2011-09-30

3.09B

2011-06-30

3.11B

2011-03-31

3.10B

2010-12-31

3.08B

2010-09-30

3.10B

2010-06-30

3.13B

2010-03-31

3.14B

2009-12-31

2.11B

2009-09-30

2.11B

2009-06-30

2.11B

2009-03-31

2.11B

2008-12-31

2.13B

2008-09-30

2.13B

2008-06-30

2.15B

2008-03-31

2.16B

2007-12-31

2.18B

2007-09-30

2.18B

2007-06-30

2.18B

2007-03-31

2.19B

2006-12-31

2.18B

2006-09-30

2.19B

2006-06-30

2.17B

2006-03-31

2.19B

2005-12-31

2.19B

2005-09-30

2.20B

2005-06-30

2.21B

2005-03-31

2.21B

2004-12-31

2.22B

2004-09-30

2.23B

2004-06-30

2.23B

2004-03-31

2.23B

2003-12-31

2.24B

2003-09-30

2.25B

2003-06-30

2.26B

2003-03-31

2.26B

2002-12-31

2.25B

2002-09-30

2.27B

Shares Outstanding: 2.47B

MRK Shares Outstanding

MRK Average Shares Outstanding Chart

MRK Current vs Average Shares Outstanding Chart

MRK Shares Outstanding Metrics

Share Structure

Quarterly Shares Outstanding History

Shares Outstanding Formula & Definition

Shares Outstanding FAQ

MRK Shares Outstanding History

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