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| Latest Insider Trading | Top Insider Trading Recent Week | Top 10% Owner Trading Recent Week | Filter
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| Ticker | Owner | Relationship | Date | Transaction | Cost |
#Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| GHC | O'Shaughnessy Timothy J | President and CEO | Nov 11 '25 | Option Exercise | 872.01 | 7,582 | 6,611,580 | 34,323 | Nov 13 04:27 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Sep 29 '25 | Option Exercise | 872.01 | 7,580 | 6,609,836 | 32,007 | Sep 30 06:56 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Aug 20 '25 | Option Exercise | 872.01 | 7,580 | 6,609,836 | 31,305 | Aug 22 04:21 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Nov 01 '24 | Option Exercise | 719.15 | 25,754 | 18,520,989 | 47,578 | Nov 05 04:21 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Oct 15 '24 | Option Exercise | 719.15 | 25,752 | 18,519,551 | 45,950 | Oct 17 07:11 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Sep 23 '24 | Option Exercise | 719.15 | 25,752 | 18,519,551 | 44,610 | Sep 25 08:36 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Jul 06 '23 | Option Exercise | 426.86 | 2,060 | 879,332 | 18,855 | Jul 07 04:24 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Mar 07 '23 | Option Exercise | 426.86 | 1,000 | 426,860 | 16,795 | Mar 08 04:24 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Mar 07 '22 | Option Exercise | 426.86 | 3,153 | 1,345,890 | 15,795 | Mar 08 04:31 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Aug 02 '18 | Buy | 547.48 | 1,360 | 744,575 | 10,252 | Aug 06 04:16 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Aug 02 '18 | Buy | 547.48 | 1,360 | 744,575 | 5,160 | Aug 06 04:16 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Aug 03 '18 | Buy | 558.63 | 440 | 245,797 | 10,692 | Aug 06 04:16 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Aug 03 '18 | Buy | 558.63 | 440 | 245,798 | 5,600 | Aug 06 04:16 PM |
| GHC | O'Shaughnessy Timothy J | President and CEO | Mar 23 '16 | Buy | 463.61 | 1,100 | 509,971 | 8,892 | Mar 24 05:29 PM |
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