Three Months Ended March 31,

Common Stock

Other
Paid-In
Capital

Retained
Earnings

Accumulated
Other
Comprehensive
Loss

Treasury Stock

Non-
controlling
Interests

Total

($ and shares in millions except per share amounts)

Shares

Par Value

Shares

Cost

Balance at January 1, 2020

3,577

$

1,788

$

39,660

$

46,602

$

(6,193)

1,038

$

(55,950)

$

94

$

26,001

Net income attributable to Merck & Co., Inc.

—

3,219

—

3,219

Other comprehensive loss, net of taxes

—

(198)

—

(198)

Cash dividends declared on common stock ($0.61 per share)

—

(1,549)

—

(1,549)

Treasury stock shares purchased

—

16

(1,281)

—

(1,281)

Share-based compensation plans and other

—

37

—

(1)

70

—

107

Other changes in noncontrolling interests

—

1

Balance at March 31, 2020

3,577

$

1,788

$

39,697

$

48,272

$

(6,391)

1,053

$

(57,161)

$

95

$

26,300

Balance at January 1, 2021

3,577

$

1,788

$

39,588

$

47,362

$

(6,634)

1,047

$

(56,787)

$

87

$

25,404

Net income attributable to Merck & Co., Inc.

—

3,179

—

3,179

Other comprehensive income, net of taxes

—

12

—

12

Cash dividends declared on common stock ($0.65 per share)

—

(1,653)

—

(1,653)

Share-based compensation plans and other

—

25

—

(1)

65

—

90

Net income attributable to noncontrolling interests

—

7

Balance at March 31, 2021

3,577

$

1,788

$

39,613

$

48,888

$

(6,622)

1,046

$

(56,722)

$

94

$

27,039