2026Q1
| Insider | Role (last 12 mo) | Shares held | Filed at |
|---|---|---|---|
| Graham Holdings Co | — | 1,428,094 | Nov 2, 2015 |
| Graham Donald | Director | 628,209 | Apr 9, 2018 |
| Berkshire Hathaway Inc | — | 107,575 | Jul 2, 2014 |
| Buffett Warren E | — | 107,575 | Jul 2, 2014 |
| National Indemnity Co | — | 107,575 | Jul 2, 2014 |
| Exec date | Filing date | Insider | Role | Signal | Confidence | Shares | % of shares | Under plan? | Amount (USD) |
|---|---|---|---|---|---|---|---|---|---|
| Jan 16, 2026 | Jan 21, 2026 | Maas, Jacob | Executive VP | Sell | 97.5 | +623 | 10.32% | ✗ | $433.7K |
| Jan 2, 2026 | Jan 5, 2026 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +22 | 1.48% | ✗ | - |
| Jan 2, 2026 | Jan 5, 2026 | MULCAHY ANNE M | Director | Neutral | 82.5 | +22 | 3.18% | ✗ | - |
| Jan 2, 2026 | Jan 5, 2026 | Markell Jack A. | Director | Neutral | 90.0 | +8 | 32.00% | ✗ | - |
| Jan 2, 2026 | Jan 5, 2026 | Davis Christopher C | Director | Neutral | 60.0 | +25 | 0.45% | ✗ | - |
| Jan 2, 2026 | Jan 5, 2026 | CONLEY DANIELLE Y. | Director | Neutral | 82.5 | +20 | 4.99% | ✗ | - |
| Dec 29, 2025 | Dec 29, 2025 | Weymouth Katharine | Director | Neutral | 52.5 | - | 0.00% | ✗ | - |
| Nov 11, 2025 | Nov 13, 2025 | O'Shaughnessy Laura | 10% Owner | Sell | 16.3 | -6,839 | -17.13% | ✗ | $7.4M |
| Nov 11, 2025 | Nov 13, 2025 | O'Shaughnessy Timothy J | CEO | Sell | 16.3 | -6,839 | -17.13% | ✗ | $7.4M |
| Oct 20, 2025 | Oct 22, 2025 | Maas, Jacob | Executive VP | Sell | 92.5 | +499 | 9.02% | ✗ | $494.8K |
| Oct 7, 2025 | Oct 9, 2025 | O'Shaughnessy Timothy J | CEO | Neutral | 27.5 | -2,800 | -7.97% | ✗ | - |
| Oct 7, 2025 | Oct 9, 2025 | O'Shaughnessy Laura | 10% Owner | Neutral | 27.5 | -2,800 | -7.97% | ✗ | - |
| Oct 1, 2025 | Oct 2, 2025 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +21 | 1.43% | ✗ | - |
| Oct 1, 2025 | Oct 2, 2025 | MULCAHY ANNE M | Director | Neutral | 82.5 | +21 | 3.13% | ✗ | - |
| Oct 1, 2025 | Oct 2, 2025 | Markell Jack A. | Director | Neutral | 90.0 | +7 | 38.89% | ✗ | - |
| Oct 1, 2025 | Oct 2, 2025 | Davis Christopher C | Director | Neutral | 60.0 | +23 | 0.42% | ✗ | - |
| Oct 1, 2025 | Oct 2, 2025 | CONLEY DANIELLE Y. | Director | Neutral | 82.5 | +19 | 4.97% | ✗ | - |
| Sep 29, 2025 | Sep 30, 2025 | O'Shaughnessy Laura | 10% Owner | Sell | 16.3 | -6,568 | -15.75% | ✗ | $7.8M |
| Sep 29, 2025 | Sep 30, 2025 | O'Shaughnessy Timothy J | CEO | Sell | 16.3 | -6,568 | -15.75% | ✗ | $7.8M |
| Aug 20, 2025 | Aug 22, 2025 | O'Shaughnessy Timothy J | CEO | Sell | 16.3 | -6,878 | -16.77% | ✗ | $7.4M |
| Aug 20, 2025 | Aug 22, 2025 | O'Shaughnessy Laura | 10% Owner | Sell | 16.3 | -6,878 | -16.77% | ✗ | $7.4M |
| Aug 19, 2025 | Aug 21, 2025 | Maas, Jacob | Executive VP | Sell | 17.5 | -1,752 | -24.04% | ✗ | $1.9M |
| Jul 1, 2025 | Jul 2, 2025 | MULCAHY ANNE M | Director | Neutral | 82.5 | +26 | 4.03% | ✗ | - |
| Jul 1, 2025 | Jul 2, 2025 | CONLEY DANIELLE Y. | Director | Neutral | 85.0 | +23 | 6.41% | ✗ | - |
| Jul 1, 2025 | Jul 2, 2025 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +26 | 1.80% | ✗ | - |
| Jul 1, 2025 | Jul 2, 2025 | Davis Christopher C | Director | Neutral | 67.5 | +28 | 0.51% | ✗ | - |
| Jul 1, 2025 | Jul 2, 2025 | Markell Jack A. | Director | Neutral | 90.0 | +9 | 100.00% | ✗ | - |
| Apr 1, 2025 | Apr 3, 2025 | Markell Jack A. | Director | Neutral | 90.0 | +9 | 100.00% | ✗ | - |
| Apr 1, 2025 | Apr 3, 2025 | MULCAHY ANNE M | Director | Neutral | 82.5 | +25 | 4.03% | ✗ | - |
| Apr 1, 2025 | Apr 3, 2025 | Davis Christopher C | Director | Neutral | 67.5 | +28 | 0.51% | ✗ | - |
| Apr 1, 2025 | Apr 3, 2025 | CONLEY DANIELLE Y. | Director | Neutral | 85.0 | +23 | 6.85% | ✗ | - |
| Apr 1, 2025 | Apr 3, 2025 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +25 | 1.77% | ✗ | - |
| Jan 27, 2025 | Jan 29, 2025 | Maas, Jacob | Executive VP | Sell | 97.5 | +562 | 11.89% | ✗ | $402.2K |
| Jan 2, 2025 | Jan 6, 2025 | Cooney Wallace R. | CFO | Sell | 90.0 | +208 | 6.27% | ✗ | $193.6K |
| Jan 2, 2025 | Jan 6, 2025 | Maas, Jacob | Executive VP | Sell | 87.5 | +173 | 3.80% | ✗ | $224.1K |
| Jan 2, 2025 | Jan 6, 2025 | Maddrey Nicole Marie | Sr. VP-GC & Secretary | Neutral | 90.0 | +401 | 10.49% | ✗ | - |
| Jan 2, 2025 | Jan 6, 2025 | Rosen Andrew Stephen | President | Neutral | 67.5 | +344 | 0.85% | ✗ | - |
| Jan 2, 2025 | Jan 6, 2025 | Stonesifer Sandra M. | VP, Chief HR Officer | Sell | 95.0 | +180 | 15.76% | ✗ | $192.7K |
| Jan 2, 2025 | Jan 6, 2025 | Snyman Marcel A. | VP-Chief Accounting Officer | Sell | 37.5 | -14 | -3.07% | ✓ | $213.4K |
| Jan 2, 2025 | Jan 6, 2025 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +28 | 2.02% | ✗ | - |
| Jan 2, 2025 | Jan 6, 2025 | MULCAHY ANNE M | Director | Neutral | 82.5 | +28 | 4.73% | ✗ | - |
| Jan 2, 2025 | Jan 6, 2025 | Davis Christopher C | Director | Neutral | 67.5 | +31 | 0.57% | ✗ | - |
| Jan 2, 2025 | Jan 6, 2025 | CONLEY DANIELLE Y. | Director | Neutral | 85.0 | +25 | 8.04% | ✗ | - |
| Nov 13, 2024 | Nov 14, 2024 | Weymouth Katharine | Director | Sell | 20.0 | -378 | -18.97% | ✗ | $358.8K |
| Nov 5, 2024 | Nov 8, 2024 | Maas, Jacob | Executive VP | Neutral | 90.0 | +1,000 | 28.15% | ✗ | - |
| Nov 1, 2024 | Nov 5, 2024 | O'Shaughnessy Laura | 10% Owner | Sell | 15.0 | -23,858 | -41.65% | ✗ | $20.1M |
| Nov 1, 2024 | Nov 5, 2024 | O'Shaughnessy Timothy J | CEO | Sell | 15.0 | -23,858 | -41.65% | ✗ | $20.1M |
| Oct 15, 2024 | Oct 17, 2024 | O'Shaughnessy Laura | 10% Owner | Sell | 15.0 | -24,126 | -43.35% | ✗ | $19.9M |
| Oct 15, 2024 | Oct 17, 2024 | O'Shaughnessy Timothy J | CEO | Sell | 15.0 | -24,126 | -43.35% | ✗ | $19.9M |
| Oct 1, 2024 | Oct 2, 2024 | CONLEY DANIELLE Y. | Director | Neutral | 85.0 | +27 | 9.51% | ✗ | - |
| Oct 1, 2024 | Oct 2, 2024 | Davis Christopher C | Director | Neutral | 67.5 | +34 | 0.63% | ✗ | - |
| Oct 1, 2024 | Oct 2, 2024 | MULCAHY ANNE M | Director | Neutral | 85.0 | +30 | 5.34% | ✗ | - |
| Oct 1, 2024 | Oct 2, 2024 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +30 | 2.21% | ✗ | - |
| Sep 23, 2024 | Sep 25, 2024 | O'Shaughnessy Laura | 10% Owner | Sell | 15.0 | -24,412 | -44.95% | ✗ | $19.5M |
| Sep 23, 2024 | Sep 25, 2024 | O'Shaughnessy Timothy J | CEO | Sell | 15.0 | -24,412 | -44.95% | ✗ | $19.5M |
| Sep 12, 2024 | Sep 13, 2024 | GAYNER THOMAS SINNICKSON | Director | Buy | 82.5 | +100 | 1.72% | ✗ | $74.3K |
| Sep 5, 2024 | O'Shaughnessy Laura | 10% Owner | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Jul 1, 2024 | Jul 2, 2024 | WAGONER G RICHARD JR | Director | Neutral | 82.5 | +35 | 2.65% | ✗ | - |
| Jul 1, 2024 | Jul 2, 2024 | MULCAHY ANNE M | Director | Neutral | 85.0 | +35 | 6.64% | ✗ | - |
| Jul 1, 2024 | Jul 2, 2024 | Davis Christopher C | Director | Neutral | 67.5 | +39 | 0.73% | ✗ | - |
| Jul 1, 2024 | Jul 2, 2024 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +32 | 12.70% | ✗ | - |
| May 28, 2024 | May 29, 2024 | MULCAHY ANNE M | Director | Buy | 95.0 | +135 | 25.62% | ✗ | $100.6K |
| Apr 1, 2024 | Apr 2, 2024 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +29 | 13.00% | ✗ | - |
| Apr 1, 2024 | Apr 2, 2024 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +29 | 13.00% | ✗ | - |
| Apr 1, 2024 | Apr 2, 2024 | WAGONER G RICHARD JR | Director | Neutral | 77.5 | +32 | 2.48% | ✗ | - |
| Apr 1, 2024 | Apr 2, 2024 | Davis Christopher C | Director | Neutral | 67.5 | +36 | 0.68% | ✗ | - |
| Apr 1, 2024 | Apr 2, 2024 | MULCAHY ANNE M | Director | Neutral | 85.0 | +32 | 6.46% | ✗ | - |
| Mar 14, 2024 | Mar 15, 2024 | Weymouth Katharine | Director | Sell | 20.0 | -556 | -21.81% | ✗ | $396.4K |
| Jan 2, 2024 | Jan 3, 2024 | WAGONER G RICHARD JR | Director | Neutral | 82.5 | +35 | 2.79% | ✗ | - |
| Jan 2, 2024 | Jan 3, 2024 | MULCAHY ANNE M | Director | Neutral | 85.0 | +35 | 7.61% | ✗ | - |
| Jan 2, 2024 | Jan 3, 2024 | Davis Christopher C | Director | Neutral | 67.5 | +39 | 0.74% | ✗ | - |
| Jan 2, 2024 | Jan 3, 2024 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +32 | 16.75% | ✗ | - |
| Nov 9, 2023 | Nov 9, 2023 | GAYNER THOMAS SINNICKSON | Director | Buy | 82.5 | +100 | 1.75% | ✗ | $60.7K |
| Nov 8, 2023 | Nov 9, 2023 | Allen Tony | Director | Sell | 26.3 | -75 | -83.33% | ✗ | $46.4K |
| Oct 2, 2023 | Oct 3, 2023 | WAGONER G RICHARD JR | Director | Neutral | 82.5 | +42 | 3.46% | ✗ | - |
| Oct 2, 2023 | Oct 3, 2023 | MULCAHY ANNE M | Director | Neutral | 90.0 | +42 | 10.05% | ✗ | - |
| Oct 2, 2023 | Oct 3, 2023 | Davis Christopher C | Director | Neutral | 67.5 | +47 | 0.90% | ✗ | - |
| Oct 2, 2023 | Oct 3, 2023 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +38 | 24.84% | ✗ | - |
| Oct 2, 2023 | Oct 3, 2023 | Allen Tony | Director | Neutral | 90.0 | +15 | 20.00% | ✗ | - |
| Sep 8, 2023 | Sep 12, 2023 | GAYNER THOMAS SINNICKSON | Director | Buy | 82.5 | +100 | 1.79% | ✗ | $57K |
| Jul 6, 2023 | Jul 7, 2023 | O'Shaughnessy Timothy J | CEO | Neutral | 52.5 | - | 0.00% | ✗ | - |
| Jul 3, 2023 | Jul 6, 2023 | WAGONER G RICHARD JR | Director | Neutral | 82.5 | +43 | 3.67% | ✗ | - |
| Jul 3, 2023 | Jul 6, 2023 | MULCAHY ANNE M | Director | Neutral | 90.0 | +43 | 11.47% | ✗ | - |
| Jul 3, 2023 | Jul 6, 2023 | Davis Christopher C | Director | Neutral | 67.5 | +48 | 0.93% | ✗ | - |
| Jul 3, 2023 | Jul 6, 2023 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +39 | 34.21% | ✗ | - |
| Jul 3, 2023 | Jul 6, 2023 | Allen Tony | Director | Neutral | 90.0 | +15 | 25.00% | ✗ | - |
| May 9, 2023 | May 9, 2023 | GAYNER THOMAS SINNICKSON | Director | Buy | 82.5 | +100 | 1.82% | ✗ | $58.2K |
| Apr 3, 2023 | Apr 4, 2023 | MULCAHY ANNE M | Director | Neutral | 90.0 | +42 | 12.61% | ✗ | - |
| Apr 3, 2023 | Apr 4, 2023 | CONLEY DANIELLE Y. | Director | Neutral | 90.0 | +37 | 48.05% | ✗ | - |
| Apr 3, 2023 | Apr 4, 2023 | Allen Tony | Director | Neutral | 90.0 | +15 | 33.33% | ✗ | - |
| Apr 3, 2023 | Apr 4, 2023 | Davis Christopher C | Director | Neutral | 67.5 | +46 | 0.89% | ✗ | - |
| Apr 3, 2023 | Apr 4, 2023 | WAGONER G RICHARD JR | Director | Neutral | 82.5 | +42 | 3.72% | ✗ | - |
| Mar 7, 2023 | Mar 8, 2023 | O'Shaughnessy Timothy J | CEO | Neutral | 52.5 | - | 0.00% | ✗ | - |
| Jan 9, 2023 | Jan 9, 2023 | Snyman Marcel A. | VP-Chief Accounting Officer | Sell | 15.0 | -128 | -21.92% | ✓ | $79.1K |
| Jan 3, 2023 | Jan 4, 2023 | MULCAHY ANNE M | Director | Neutral | 90.0 | +41 | 14.04% | ✗ | - |
| Jan 3, 2023 | Jan 4, 2023 | Rosen Andrew Stephen | President | Neutral | 77.5 | +493 | 1.23% | ✗ | - |
| Jan 3, 2023 | Jan 4, 2023 | Stonesifer Sandra M. | VP, Chief HR Officer | Neutral | 90.0 | +525 | 85.09% | ✗ | - |
| Jan 3, 2023 | Jan 4, 2023 | Snyman Marcel A. | VP-Chief Accounting Officer | Sell | 91.3 | +141 | 31.83% | ✓ | $44K |
| Jan 3, 2023 | Jan 4, 2023 | Maddrey Nicole Marie | Sr. VP-GC & Secretary | Neutral | 90.0 | +575 | 17.71% | ✗ | - |
| Jan 3, 2023 | Jan 4, 2023 | Maas, Jacob | Executive VP-Planning and Dev. | Neutral | 90.0 | +616 | 20.98% | ✗ | - |