GHC - CIK 0000104889
Graham Holdings Co has filed 1,251 documents with the SEC between 1994 and 2026. The most frequent type is insider trade (519 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 |
|---|---|---|---|
| SC 13E4/A | - | 1999-12-07 | - |
| Insider trade | 4 | 1999-11-10 | 1999-10-31 |
| Insider trade | 4 | 1999-11-10 | 1999-10-31 |
| SC 13E4 | - | 1999-11-10 | - |
| Quarterly report | 10-Q | 1999-11-10 | 1999-10-03 |
| Insider trade | 4 | 1999-10-12 | 1999-09-30 |
| Insider trade | 4 | 1999-09-10 | 1999-08-31 |
| Quarterly report | 10-Q | 1999-08-18 | 1999-07-04 |
| Insider trade | 4 | 1999-08-10 | 1999-07-31 |
| Insider trade | 4 | 1999-08-06 | 1999-07-31 |
| Insider trade | 4 | 1999-07-08 | 1999-06-07 |
| Insider trade | 4 | 1999-06-09 | 1999-05-18 |
| Insider trade | 4 | 1999-06-08 | 1999-05-31 |
| Insider trade | 4 | 1999-06-07 | 1999-05-28 |
| Quarterly report | 10-Q | 1999-05-18 | 1999-04-04 |
| Insider trade | 4 | 1999-05-07 | 1999-04-26 |
| Insider trade | 4 | 1999-05-07 | 1999-04-01 |
| Insider trade | 4 | 1999-04-08 | 1999-03-31 |
| Insider trade | 4 | 1999-04-08 | 1999-03-31 |
| Proxy statement | DEF 14A | 1999-03-31 | 1999-05-13 |
| Activist ownership stake (update) | SC 13D/A | 1999-03-26 | - |
| 10-K405 | - | 1999-03-26 | 1999-01-03 |
| Passive ownership stake (update) | SC 13G/A | 1999-02-24 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-02-23 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-02-23 | - |
| Insider trade | 4 | 1999-02-17 | 1998-02-11 |
| Insider trade | 4 | 1999-02-17 | 1998-03-01 |
| Insider trade | 4 | 1999-02-17 | 1998-02-01 |
| Annual insider summary | 5 | 1999-02-17 | 1997-12-01 |
| Insider trade | 4 | 1999-02-17 | 1997-04-01 |
| Insider trade | 4 | 1999-02-17 | 1997-01-01 |
| Passive ownership stake | SC 13G | 1999-02-16 | - |
| Prospectus supplement | 424B5 | 1999-02-12 | - |
| Insider trade | 4 | 1999-02-09 | 1999-01-31 |
| 424B3 | - | 1999-02-09 | - |
| Insider trade | 4 | 1999-01-07 | 1998-12-31 |
| Insider trade | 4 | 1999-01-07 | 1998-12-31 |
| Insider trade | 4 | 1999-01-07 | 1998-12-31 |
| Insider trade | 4 | 1999-01-07 | 1998-12-31 |
| Insider trade | 4 | 1999-01-07 | 1998-12-11 |
| Insider trade | 4 | 1999-01-07 | 1998-12-11 |
| Securities registration | S-3 | 1998-12-23 | - |
| Activist ownership stake (update) | SC 13D/A | 1998-12-09 | - |
| Quarterly report | 10-Q | 1998-11-12 | 1998-09-27 |
| Insider trade | 4 | 1998-11-05 | 1998-10-30 |
| Insider trade | 4 | 1998-10-05 | 1998-09-30 |
| Insider trade | 4 | 1998-10-05 | 1998-09-30 |
| Insider trade | 4 | 1998-09-09 | 1998-08-31 |
| Quarterly report | 10-Q | 1998-08-11 | 1998-06-28 |
| Insider trade | 4 | 1998-08-07 | 1998-07-31 |