| Type | Value |
|---|---|
| cik | 0000104889 |
| ticker | GHC |
Discretionary BUY minus SELL in USD over rolling windows. Excludes compensation flow.
| Date | Type | Insider | Qty | Price | Signals |
|---|---|---|---|---|---|
| 26 May 2026 | OTHER | O'Shaughnessy Timothy J | 5,600 | — | indirect |
| 26 May 2026 | OTHER | O'Shaughnessy Timothy J | 400 | — | |
| 26 May 2026 | OTHER | O'Shaughnessy Timothy J | 6,000 | — | derivindirect |
| 26 May 2026 | OTHER | Weymouth Katharine | 6,000 | — | |
| 26 May 2026 | OTHER | Weymouth Katharine | 6,000 | — | deriv |
| 26 May 2026 | OTHER | O'Shaughnessy Laura | 5,600 | — | indirect |
| 26 May 2026 | OTHER | O'Shaughnessy Laura | 400 | — | |
| 26 May 2026 | OTHER | O'Shaughnessy Laura | 6,000 | — | deriv |
| 30 Jul 2025 | SALE | Allen Tony | 7 | 942.89 USD | |
| 16 Jan 2026 | GRANT_AWARD | Maas, Jacobentity | 1,000 | 0.00 USD | |
| 16 Jan 2026 | TAX_WITHHOLDING | Maas, Jacobentity | 377 | 1150.50 USD | |
| 02 Jan 2026 | GRANT_AWARD | WAGONER G RICHARD JR | 22 | 1091.18 USD | indirect |
| 02 Jan 2026 | GRANT_AWARD | MULCAHY ANNE M | 22 | 1091.18 USD | indirect |
| 02 Jan 2026 | GRANT_AWARD | CONLEY DANIELLE Y. | 20 | 1091.18 USD | indirect |
| 02 Jan 2026 | GRANT_AWARD | Davis Christopher C | 25 | 1091.18 USD | |
| 02 Jan 2026 | GRANT_AWARD | Markell Jack A. | 8 | 1091.18 USD | indirect |
| 29 Dec 2025 | OTHER | Weymouth Katharine | 36,000 | — | deriv |
| 11 Nov 2025 | TAX_WITHHOLDING | O'Shaughnessy Timothy J | 6,839 | 1085.29 USD | |
| 11 Nov 2025 | EXERCISE | O'Shaughnessy Timothy J | 7,582 | 872.01 USD | |
| 11 Nov 2025 | EXERCISE | O'Shaughnessy Timothy J | 7,582 | 0.00 USD | deriv |
| 11 Nov 2025 | TAX_WITHHOLDING | O'Shaughnessy Laura | 6,839 | 1085.29 USD | |
| 11 Nov 2025 | EXERCISE | O'Shaughnessy Laura | 7,582 | 872.01 USD | |
| 11 Nov 2025 | EXERCISE | O'Shaughnessy Laura | 7,582 | 0.00 USD | derivindirect |
| 20 Oct 2025 | GRANT_AWARD | Maas, Jacobentity | 1,000 | 0.00 USD | |
| 20 Oct 2025 | TAX_WITHHOLDING | Maas, Jacobentity | 501 | 987.72 USD |