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Merck & Co., Inc.

MRKNYSEPharmaceutical PreparationsFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 7, 2026Score 9/30250% above fair value
$149.52+3.19 (+2.18%)

Close on Oct 30, 2026Market cap $368.89BP/E 119.6Yield 2.19%

Merck Dificid (fidaxomicin by Year

Dificid (fidaxomicin — C. difficile infection) — International sales ($M) ($M)

Merck Dificid (fidaxomicin: $45M in FY2025, up 21.6% from a year earlier.

Latest, FY2025
45
Period ended Dec 31, 2025
Change on a year earlier
+21.6%
37 in FY2024
History
6 years
Since FY2020
Sources
5
Documents cited below

Where the FY2025 figure comes from

“|| Dificid | 247 | 340 | -27 | 202 | 303 | -33 | 45 | 37 | 20”

Source: Form 8-K (tm264564d1_ex99-1.htm, filed 2026-02-03) ↗

Reported in Form 10-Q / 10-K Segment & Product Sales Footnote & Form 8-K Table 3 / 3a / 3b.

Annual history

Hover a value to see the sentence it was read from; calculated values show their formula

PeriodEndedDificid (fidaxomicin — C. difficile infection) — International sales ($M) ($M)Year on yearSource
FY2025Dec 31, 202545+21.6%Form 8-K (tm264564d1_ex99-1.htm, filed 2026-02-03) ↗
FY2024Dec 31, 202437+32.1%Form 8-K (tm264564d1_ex99-1.htm, filed 2026-02-03) ↗
FY2023Dec 31, 202328+27.3%Form 8-K (tm255059d1_ex99-1.htm, filed 2025-02-04) ↗
FY2022Dec 31, 202222+120.0%Form 8-K (tm244517d1_ex99-1.htm, filed 2024-02-01) ↗
FY2021Dec 31, 202110+42.9%Form 10-K (filed 2024-02-26) ↗
FY2020Dec 31, 20207–Form 10-K (filed 2023-02-24) ↗

Breakdown

What makes up dificid (fidaxomicin

Cite this data

StockData. (2026). Merck Dificid (fidaxomicin ($M), annual FY2020–FY2025 [Data set]. Compiled from Merck SEC filings and investor materials. https://stockdatahq.com/stocks/mrk/kpis/rev-dificid-intl

See every metric in the Merck KPI table. Data updated Oct 26, 2026.