MRK - CIK 0000310158
Merck & Co., Inc. has filed 996 documents with the SEC between 2018 and 2026. The most frequent type is insider trade (653 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Prospectus supplement | 424B5 | 2026-05-20 | - |
| Free writing prospectus | FWP | 2026-05-19 | - |
| Prospectus supplement | 424B5 | 2026-05-18 | - |
| Institutional holdings | 13F-HR | 2026-05-13 | 2026-03-31 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| Insider trade | 4 | 2026-05-07 | 2026-05-05 |
| SC TO-T/A | - | 2026-05-05 | - |
| Insider trade | 4 | 2026-05-05 | 2026-05-02 |
| Insider trade | 4 | 2026-05-05 | 2026-05-02 |
| 3/A | - | 2026-05-05 | 2026-05-01 |
| Quarterly report | 10-Q | 2026-05-04 | 2026-03-31 |
| New insider ownership | 3 | 2026-05-04 | 2026-05-01 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| Insider trade | 4 | 2026-05-01 | 2026-04-29 |
| SCHEDULE 13G | - | 2026-04-30 | - |
| Major company event | 8-K | 2026-04-30 | 2026-04-30 |
| SC TO-T/A | - | 2026-04-24 | - |
| Annual report to shareholders | ARS | 2026-04-08 | 2025-12-31 |
| Proxy materials | DEFA14A | 2026-04-08 | - |
| Proxy statement | DEF 14A | 2026-04-08 | 2026-05-26 |
| SC TO-T | - | 2026-04-07 | - |
| Insider trade | 4 | 2026-04-01 | 2026-03-31 |
| Insider trade | 4 | 2026-04-01 | 2026-03-31 |
| Insider trade | 4 | 2026-04-01 | 2026-03-31 |
| SCHEDULE 13G/A | - | 2026-03-27 | - |
| New insider ownership | 3 | 2026-03-12 | 2026-03-02 |
| Annual report | 10-K | 2026-02-24 | 2025-12-31 |
| Institutional holdings | 13F-HR | 2026-02-17 | 2025-12-31 |
| 144/A | - | 2026-02-13 | - |
| Insider trade | 4 | 2026-02-12 | 2026-02-12 |
| Insider sale notice | 144 | 2026-02-10 | - |