v3.26.1
(Loss) Earnings Per Share
 6 Months Ended
Jun. 30, 2026
Earnings Per Share [Abstract]  
(Loss) Earnings Per Share (Loss) Earnings Per Share
The calculations of (loss) earnings per share are as follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
($ and shares in millions except per share amounts)2026202520262025
Net (Loss) Income Attributable to Merck & Co., Inc.
$(1,335)$4,427 $(5,575)$9,506 
Average common shares outstanding2,470 2,510 2,471 2,516 
Common shares issuable (1)
— 3 — 6 
Average common shares outstanding assuming dilution 2,470 2,513 2,471 2,522 
Basic (Loss) Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders
$(0.54)$1.76 $(2.26)$3.78 
(Loss) Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders
$(0.54)$1.76 $(2.26)$3.77 
(1)    Issuable primarily under share-based compensation plans.
The Company recorded a net loss for both the second quarter and first six months of 2026; therefore, no potential dilutive common shares were used in the computations of loss per common share assuming dilution because the effects would have been antidilutive. For the second quarter and first six months of 2025, 19 million and 12 million, respectively, of common shares issuable under share-based compensation plans were excluded from the computations of earnings per common share assuming dilution because the effects would have been antidilutive.