10 insiders reported 58 Form 4 transactions for Graham Holdings Co (GHC) over the past 18 months (most recent 2026-08-14). Recent activity: O'Shaughnessy Timothy J (President and CEO) Sell 4,211 shares, O'Shaughnessy Laura (10% Owner) Sell 4,211 shares, CONLEY DANIELLE Y. (Director) Buy 19 shares, MULCAHY ANNE M (Director) Buy 21 shares, Davis Christopher C (Director) Buy 23 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-14 | O'Shaughnessy Timothy J | President and CEO | Sell | 4,211 | $0 |
| 2026-08-14 | O'Shaughnessy Laura | 10% Owner | Sell | 4,211 | $0 |
| 2026-07-06 | CONLEY DANIELLE Y. | Director | Buy | 19 | $22,061 |
| 2026-07-06 | MULCAHY ANNE M | Director | Buy | 21 | $24,383 |
| 2026-07-06 | Davis Christopher C | Director | Buy | 23 | $26,706 |
| 2026-07-06 | Markell Jack A. | Director | Buy | 7 | $8,128 |
| 2026-07-06 | WAGONER G RICHARD JR | Director | Buy | 21 | $24,383 |
| 2026-05-28 | Weymouth Katharine | Director | Buy | 6,000 | $0 |
| 2026-05-28 | O'Shaughnessy Timothy J | President and CEO | Sell | 5,600 | $0 |
| 2026-05-28 | O'Shaughnessy Laura | 10% Owner | Sell | 5,600 | $0 |
| 2026-05-28 | O'Shaughnessy Timothy J | President and CEO | Sell | 400 | $0 |
| 2026-05-28 | O'Shaughnessy Laura | 10% Owner | Sell | 400 | $0 |
| 2026-04-02 | MULCAHY ANNE M | Director | Buy | 23 | $24,419 |
| 2026-04-02 | Davis Christopher C | Director | Buy | 25 | $26,542 |
| 2026-04-02 | Markell Jack A. | Director | Buy | 8 | $8,494 |
| 2026-04-02 | CONLEY DANIELLE Y. | Director | Buy | 21 | $22,296 |
| 2026-04-02 | WAGONER G RICHARD JR | Director | Buy | 23 | $24,419 |
| 2026-03-10 | Allen Tony | Director | Sell | 7 | $6,600 |
| 2026-01-21 | Maas, Jacob | Executive VP | Buy | 1,000 | $0 |
| 2026-01-21 | Maas, Jacob | Executive VP | Sell | 377 | $433,738 |
| 2026-01-05 | CONLEY DANIELLE Y. | Director | Buy | 20 | $21,824 |
| 2026-01-05 | MULCAHY ANNE M | Director | Buy | 22 | $24,006 |
| 2026-01-05 | WAGONER G RICHARD JR | Director | Buy | 22 | $24,006 |
| 2026-01-05 | Davis Christopher C | Director | Buy | 25 | $27,280 |
| 2026-01-05 | Markell Jack A. | Director | Buy | 8 | $8,729 |
Source: SEC Form 4 filings · as of 2026-08-14