What is Merck & Co.'s common stock shares outstanding?

Merck & Co. (MRK) reported common stock shares outstanding of $275.00M in Q4 2025.

How has Merck & Co.'s common stock shares outstanding changed year-over-year?

Merck & Co.'s common stock shares outstanding increased by 10.4% year-over-year, from $249.00M to $275.00M.

What is the long-term trend for Merck & Co.'s common stock shares outstanding?

Over 5 years (2020 to 2025), Merck & Co.'s common stock shares outstanding has grown at a -4.9% compound annual growth rate (CAGR), from $353.00M to $275.00M.

What does common stock shares outstanding mean?

The total count of shares currently held by all company investors.

Equity

Common Stock Shares Outstanding

Merck & Co. Common Stock Shares Outstanding increased by 10.4% to $275.00M in Q4 2025 compared to the prior quarter. Year-over-year, this metric grew by 10.4%, from $249.00M to $275.00M. Over 5 years (FY 2020 to FY 2025), Common Stock Shares Outstanding shows a downward trend with a -4.9% CAGR.

Analysis

StatementBalance Sheet Statement

SectionEquity

CategoryCapital Allocation

SignalContext dependent

VolatilityStable

First reportedQ4 2015

Last reportedQ4 2025Feb 24, 2026

How to read this metric

An increase suggests share issuance or conversion, while a decrease indicates share buybacks or retirements.

Detailed definition

The total number of common shares held by all shareholders, including institutional investors and individual retail hold...

Peer comparison

Standard across all public companies; tracked against historical trends and peer buyback programs.

Metric ID: common_stock_shares_outstanding

Historical Data

5 periods

	Q4 '21	Q4 '22	Q4 '23	Q4 '24	Q4 '25
Value	$213.00M	$554.00M	$442.00M	$249.00M	$275.00M
QoQ Change	—	+160.1%	-20.2%	-43.7%	+10.4%
YoY Change	—	+160.1%	-20.2%	-43.7%	+10.4%

Range$213.00M – $554.00M

CAGR+29.1%

Avg YoY Growth+26.7%

Median YoY Growth-4.9%

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Frequently Asked Questions

What is Merck & Co.'s common stock shares outstanding?: Merck & Co. (MRK) reported common stock shares outstanding of $275.00M in Q4 2025.
How has Merck & Co.'s common stock shares outstanding changed year-over-year?: Merck & Co.'s common stock shares outstanding increased by 10.4% year-over-year, from $249.00M to $275.00M.
What is the long-term trend for Merck & Co.'s common stock shares outstanding?: Over 5 years (2020 to 2025), Merck & Co.'s common stock shares outstanding has grown at a -4.9% compound annual growth rate (CAGR), from $353.00M to $275.00M.
What does common stock shares outstanding mean?: The total count of shares currently held by all company investors.