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Merck & Co., Inc.
MRK - Company ID 0000310158
Market cap$371.29 B
Rank#34
Filings998
Market capitalization of Merck & Co., Inc.
As of 2026-09-08, Merck & Co., Inc. (MRK) has a market capitalization of $371.29 B, making it the #34 most valuable US-listed company.
Recent market cap readings
| Date | Market cap |
|---|---|
| 2026-09-08 | $371.29 B |
| 2026-09-07 | $371.29 B |
| 2026-09-06 | $371.29 B |
| 2026-09-05 | $371.29 B |
| 2026-09-04 | $371.29 B |
| 2026-09-03 | $376.25 B |
| 2026-09-02 | $374.52 B |
| 2026-09-01 | $370.13 B |
| 2026-08-31 | $364.94 B |
| 2026-08-30 | $366.40 B |
| 2026-08-29 | $366.40 B |
| 2026-08-28 | $366.40 B |
Market Cap of similar companies
Frequently asked questions
What is Merck & Co., Inc.'s market cap?
As of 2026-09-08, Merck & Co., Inc. (MRK) has a market capitalization of $371.29 B, making it the #34 most valuable US-listed company.
Where does Merck & Co., Inc. rank by market cap?
Merck & Co., Inc. is the #34 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.