X0508 4 2025-09-29 0000104889 Graham Holdings Co GHC 0001813477 O'Shaughnessy Laura C/O GRAHAM HOLDINGS COMPANY 1300 NORTH 17TH STREET, SUITE 1700 ARLINGTON VA 22209 true false Class B Common Stock 4099 D Class B Common Stock 2700 D Class B Common Stock 2025-09-29 4 M 0 7580 872.01 A 29307 I Spouse Class B Common Stock 2025-09-29 4 F 0 6568 1190.8 D 22739 I Spouse Class B Common Stock 5600 I Trust Class A Common Stock Class B Common Stock 2700 2700 D Employee Stock Option (Right to Buy) 872.01 2025-09-29 4 M 0 7580 0 D 2025-11-12 Class B Common Stock 7580 7582 I Spouse The reporting person has no voting or investment power with respect to such shares. The reporting person disclaims beneficial ownership of the reported securities. The options exercise was executed in anticipation of the November 12, 2025 expiration date on a net settlement basis. The reporting person's spouse is a trustee of the trust that owns the reported securities. The reporting person is a beneficiary of such trust but has no voting or investment power with respect to the shares held in such trust. The reporting person disclaims beneficial ownership of the reported securities. Shares of Class A Common Stock are convertible into shares of Class B Common Stock at any time on a one-for-one basis and have no expiration date. The stock option is fully vested. After this exercise of 7,580 options, the reporting person's spouse has 7,582 vested and exercisable options remaining. The reporting person disclaims beneficial ownership of the reported securities. /s/ Nicole Maddrey, attorney-in-fact 2025-09-30