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Merck & Co., Inc.
MRK - Company ID 0000310158
Market cap$308.78 B
Rank#45
Filings998
Market capitalization of Merck & Co., Inc.
As of 2026-07-09, Merck & Co., Inc. (MRK) has a market capitalization of $308.78 B, making it the #45 most valuable US-listed company.
Recent market cap readings
| Date | Market cap |
|---|---|
| 2026-07-09 | $308.78 B |
| 2026-07-08 | $311.17 B |
| 2026-07-07 | $318.26 B |
| 2026-07-06 | $313.00 B |
| 2026-07-05 | $319.99 B |
| 2026-07-04 | $319.99 B |
| 2026-07-03 | $319.99 B |
| 2026-07-02 | $317.76 B |
| 2026-07-01 | $309.64 B |
| 2026-06-30 | $318.47 B |
| 2026-06-29 | $318.51 B |
| 2026-06-28 | $317.77 B |
Market Cap of similar companies
Frequently asked questions
What is Merck & Co., Inc.'s market cap?
As of 2026-07-09, Merck & Co., Inc. (MRK) has a market capitalization of $308.78 B, making it the #45 most valuable US-listed company.
Where does Merck & Co., Inc. rank by market cap?
Merck & Co., Inc. is the #45 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.