MRK - CIK 0000310158
As of 2026-06-10, Merck & Co., Inc. (MRK) has a market capitalization of $293.16 B, making it the #44 most valuable US-listed company.
| Date | Market cap |
|---|---|
| 2026-06-10 | $293.16 B |
| 2026-05-29 | $292.13 B |
| 2026-05-28 | $296.97 B |
| 2026-05-26 | $299.68 B |
| 2026-05-25 | $302.33 B |
| 2026-05-24 | $302.33 B |
| 2026-05-22 | $302.33 B |
Readings accumulate daily as market data refreshes, combining SEC-reported share counts with live prices.
As of 2026-06-10, Merck & Co., Inc. (MRK) has a market capitalization of $293.16 B, making it the #44 most valuable US-listed company.
Merck & Co., Inc. is the #44 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.