GHC

SEC source: 0001628280-26-064548 · wk-form4_1790972615.xml · nonDerivative · entry 1

Markell Jack A. · CIK 0001705859 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 55

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-064546 · wk-form4_1790972545.xml · nonDerivative · entry 1

Davis Christopher C · CIK 0001350384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,638

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-064550 · wk-form4_1790972673.xml · nonDerivative · entry 1

MULCAHY ANNE M · CIK 0001201725 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 779

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-064542 · wk-form4_1790972467.xml · nonDerivative · entry 1

CONLEY DANIELLE Y. · CIK 0001944202 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 480

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-064552 · wk-form4_1790972733.xml · nonDerivative · entry 1

WAGONER G RICHARD JR · CIK 0001181664 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 1,575

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0000950157-26-000967 · ownership.xml · nonDerivative · entry 2

Maas, Jacob · CIK 0001655513 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,156

F5 · shares: Represents withholding of Class B shares for the tax liability associated with the vesting and settlement of the restricted stock unit award referred to in footnote 1 above.

SEC source: 0000950157-26-000967 · ownership.xml · nonDerivative · entry 1

Maas, Jacob · CIK 0001655513 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,657

F1 · security: On January 19, 2022, the reporting person received a restricted stock unit award (Award) with price-based vesting conditions. The terms of the Award provide that 1,000 shares vest if the issuer's Class B Common Stock's closing price meets or exceeds $700 for 90 consecutive calendar days on or before December 31, 2027, with an additional 1,000 shares vesting following each additional incremental increase of $100 in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027.

F2 · security: On November 5, 2024, the first 1,000 shares vested following achievement of the first stock price goal. On January 27, 2025, the second 1,000 shares vested following achievement of the second stock price goal. On October 20, 2025, the third 1,000 shares vested following achievement of the third stock price goal. On January 16, 2026, the fourth 1,000 shares vested following achievement of the fourth stock price goal. On August 28, 2026, the fifth 1,000 shares vested following achievement of the fifth stock price goal.

F3 · kind: Represents the sixth tranche of the Award, which will vest if the closing price of the issuer's Class B Common Stock exceeds $1,200 for 90 consecutive calendar days on or before December 31, 2027. As noted above, if such price-based vesting condition is satisfied, the reporting person is eligible for vesting of additional 1,000 share increments of Class B Common Stock for each additional $100 increase in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027 (e.g., if the closing price of the issuer's Class B Common Stock exceeds $1,300 for 90 consecutive calendar days, then 1,000 additional shares of Class B Common stock will vest).

F3 · shares: Represents the sixth tranche of the Award, which will vest if the closing price of the issuer's Class B Common Stock exceeds $1,200 for 90 consecutive calendar days on or before December 31, 2027. As noted above, if such price-based vesting condition is satisfied, the reporting person is eligible for vesting of additional 1,000 share increments of Class B Common Stock for each additional $100 increase in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027 (e.g., if the closing price of the issuer's Class B Common Stock exceeds $1,300 for 90 consecutive calendar days, then 1,000 additional shares of Class B Common stock will vest).

F4 · price: N/A

SEC source: 0000950157-26-000904 · ownership.xml · derivative · entry 3

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 19,922

Underlying: Class B Common Stock · 4,211 shares

Expires not disclosed

F4 · derivative.exercise_price: 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.

F6 · kind: Acquisition of Class A shares by the spouse of the reporting person from a distribution pursuant to the terms of a trust.

F3 · price: N/A

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000904 · ownership.xml · derivative · entry 2

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 15,711

Underlying: Class B Common Stock · 4,211 shares

Expires not disclosed

F4 · derivative.exercise_price: 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.

F5 · kind: Acquisition of Class A shares by the spouse of the reporting person in an exchange transaction for the equivalent number of Class B shares.

F3 · price: N/A

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000904 · ownership.xml · nonDerivative · entry 1

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,878

F1 · kind: Disposition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F3 · price: N/A

F2 · balance_after: Includes 13 shares of Class B Common Stock held by the reporting person in his Graham Holdings Company 401(k) plan account.

SEC source: 0000950157-26-000903 · ownership.xml · derivative · entry 4

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,922

Underlying: Class B Common Stock · 4,211 shares

Expires not disclosed

F4 · derivative.exercise_price: 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.

F6 · kind: Acquisition of Class A shares from a distribution pursuant to the terms of a trust.

F2 · price: N/A

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000903 · ownership.xml · derivative · entry 3

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,711

Underlying: Class B Common Stock · 4,211 shares

Expires not disclosed

F4 · derivative.exercise_price: 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.

F5 · kind: Acquisition of Class A shares in an exchange transaction for the equivalent number of Class B shares.

F2 · price: N/A

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000903 · ownership.xml · nonDerivative · entry 1

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,865

F1 · kind: Disposition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F2 · price: N/A

SEC source: 0000950157-26-000902 · ownership.xml · derivative · entry 2

GRAHAM DONALD · CIK 0001018401 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficiary of Trusts

Disclosed balance after: 375,592

Underlying: Class B Common Stock · Not disclosed shares

Expires not disclosed

F1 · derivative.exercise_price: 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.

F2 · kind: Distribution of Class A shares pursuant to the terms of a trust of which the reporting person is a trustee and beneficiary.

F3 · price: N/A

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

F1 · derivative.underlying_shares: 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.

SEC source: 0001628280-26-047322 · wk-form4_1783371556.xml · nonDerivative · entry 1

WAGONER G RICHARD JR · CIK 0001181664 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 1,554

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-047321 · wk-form4_1783371476.xml · nonDerivative · entry 1

MULCAHY ANNE M · CIK 0001201725 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 758

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-047319 · wk-form4_1783371412.xml · nonDerivative · entry 1

Markell Jack A. · CIK 0001705859 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 48

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-047318 · wk-form4_1783371331.xml · nonDerivative · entry 1

Davis Christopher C · CIK 0001350384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,614

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-047316 · wk-form4_1783371229.xml · nonDerivative · entry 1

CONLEY DANIELLE Y. · CIK 0001944202 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 461

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0000950157-26-000656 · ownership.xml · derivative · entry 4

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,500

Underlying: Class B Common Stock · 6,000 shares

Expires not disclosed

F5 · derivative.exercise_price: 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.

F6 · kind: Acquisition of Class A shares in an exchange transaction for the equivalent number of Class B shares.

F2 · price: N/A

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000656 · ownership.xml · nonDerivative · entry 2

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,076

F1 · kind: Disposition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F2 · price: N/A

SEC source: 0000950157-26-000656 · ownership.xml · nonDerivative · entry 1

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · Trust

Disclosed balance after: 0

F1 · kind: Disposition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F2 · price: N/A

F4 · ownership.nature: 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.

SEC source: 0000950157-26-000655 · ownership.xml · derivative · entry 2

Weymouth Katharine · CIK 0001501808 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class B Common Stock · 6,000 shares

Expires not disclosed

F3 · derivative.exercise_price: 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.

F4 · kind: Disposition of 6,000 Class A shares in an exchange transaction for the equivalent number of Class B shares.

F2 · price: N/A

F3 · derivative.exercise_date: 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.

F3 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000655 · ownership.xml · nonDerivative · entry 1

Weymouth Katharine · CIK 0001501808 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,615

F1 · kind: Acquisition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F2 · price: N/A

SEC source: 0000950157-26-000654 · ownership.xml · derivative · entry 3

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 11,500

Underlying: Class B Common Stock · 6,000 shares

Expires not disclosed

F5 · derivative.exercise_price: 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.

F6 · kind: Acquisition of Class A shares by the spouse of the reporting person in an exchange transaction for the equivalent number of Class B shares.

F3 · price: N/A

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0000950157-26-000654 · ownership.xml · nonDerivative · entry 2

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,087

F1 · kind: Disposition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F3 · price: N/A

F2 · balance_after: Includes 11 shares of Class B Common Stock held by the reporting person in his Graham Holdings Company 401(k) plan account.

SEC source: 0000950157-26-000654 · ownership.xml · nonDerivative · entry 1

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · Trust for spouse and children

Disclosed balance after: 0

F1 · kind: Disposition of Class B shares in an exchange transaction for the equivalent number of Class A shares.

F3 · price: N/A

F4 · ownership.nature: The reporting person is a trustee of the trust that owns the reported securities, but he is not a beneficiary of such trust. The reporting person disclaims beneficial ownership of the reported securities.

SEC source: 0001628280-26-023190 · wk-form4_1775161159.xml · nonDerivative · entry 1

WAGONER G RICHARD JR · CIK 0001181664 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 1,533

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-023187 · wk-form4_1775161103.xml · nonDerivative · entry 1

MULCAHY ANNE M · CIK 0001201725 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 737

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-023182 · wk-form4_1775161045.xml · nonDerivative · entry 1

Markell Jack A. · CIK 0001705859 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 41

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-023174 · wk-form4_1775160978.xml · nonDerivative · entry 1

Davis Christopher C · CIK 0001350384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,591

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-023168 · wk-form4_1775160920.xml · nonDerivative · entry 1

CONLEY DANIELLE Y. · CIK 0001944202 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 442

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-002885 · wk-form4_1769030388.xml · nonDerivative · entry 2

Maas, Jacob · CIK 0001655513 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,657

F4 · shares: Represents withholding of Class B shares for the tax liability associated with the vesting and settlement of the restricted stock unit award referred to in footnote 1 above.

SEC source: 0001628280-26-002885 · wk-form4_1769030388.xml · nonDerivative · entry 1

Maas, Jacob · CIK 0001655513 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,034

F1 · security: On January 19, 2022, the reporting person received a restricted stock unit award (Award) with price-based vesting conditions. The terms of the Award provide that 1,000 shares vest if the issuer's Class B Common Stock's closing price meets or exceeds $700 for 90 consecutive calendar days on or before December 31, 2027, with an additional 1,000 shares vesting following each additional incremental increase of $100 in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027. On November 5, 2024, the first 1,000 shares vested following achievement of the first stock price goal. On January 27, 2025, the second 1,000 shares vested following achievement of the second stock price goal. On October 20, 2025, the third 1,000 shares vested following achievement of the third stock price goal. On January 16, 2026, the fourth 1,000 shares vested following achievement of the fourth stock price goal.

F2 · kind: Represents the fifth tranche of the Award, which will vest if the closing price of the issuer's Class B Common Stock exceeds $1,100 for 90 consecutive calendar days on or before December 31, 2027. As noted above, if such price-based vesting condition is satisfied, the reporting person is eligible for vesting of additional 1,000 share increments of Class B Common Stock for each additional $100 increase in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027 (e.g., if the closing price of the issuer's Class B Common Stock exceeds $1,200 for 90 consecutive calendar days, then 1,000 additional shares of Class B Common stock will vest).

F2 · shares: Represents the fifth tranche of the Award, which will vest if the closing price of the issuer's Class B Common Stock exceeds $1,100 for 90 consecutive calendar days on or before December 31, 2027. As noted above, if such price-based vesting condition is satisfied, the reporting person is eligible for vesting of additional 1,000 share increments of Class B Common Stock for each additional $100 increase in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027 (e.g., if the closing price of the issuer's Class B Common Stock exceeds $1,200 for 90 consecutive calendar days, then 1,000 additional shares of Class B Common stock will vest).

F3 · price: N/A

SEC source: 0001628280-26-000472 · wk-form4_1767648255.xml · nonDerivative · entry 1

WAGONER G RICHARD JR · CIK 0001181664 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 1,510

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-000458 · wk-form4_1767648120.xml · nonDerivative · entry 1

MULCAHY ANNE M · CIK 0001201725 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 714

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-000453 · wk-form4_1767648015.xml · nonDerivative · entry 1

Markell Jack A. · CIK 0001705859 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 33

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-000448 · wk-form4_1767647924.xml · nonDerivative · entry 1

Davis Christopher C · CIK 0001350384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,566

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0001628280-26-000442 · wk-form4_1767647804.xml · nonDerivative · entry 1

CONLEY DANIELLE Y. · CIK 0001944202 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Revocable Trust

Disclosed balance after: 421

F1 · kind: Securities acquired pursuant to the Director's election under the Director Share Purchase Program to receive a portion of the fees received for service as a director in stock in lieu of cash.

SEC source: 0000950157-25-001035 · form4.xml · derivative · entry 2

Weymouth Katharine · CIK 0001501808 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,000

Underlying: Class B Common Stock · 36,000 shares

Expires not disclosed

F1 · derivative.exercise_price: 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.

F2 · kind: Receipt of 36,000 shares of Class A Common Stock pursuant to the terms of a trust of which the reporting person is a beneficiary.

F3 · price: N/A

F1 · derivative.exercise_date: 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.

F1 · derivative.expiration_date: 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.

SEC source: 0000950157-25-000942 · form4.xml · derivative · entry 6

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 0

Underlying: Class B Common Stock · 7,582 shares

Expires 2025-11-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: The stock option is fully vested. After this exercise of 7,582 options, the reporting person's spouse has no options remaining under the related grant.

SEC source: 0000950157-25-000942 · form4.xml · nonDerivative · entry 2

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,476

F1 · shares: The options exercise was executed in anticipation of the November 12, 2025 expiration date on a net settlement basis.

SEC source: 0000950157-25-000942 · form4.xml · nonDerivative · entry 1

O'Shaughnessy Laura · CIK 0001813477 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,315

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000950157-25-000941 · form4.xml · derivative · entry 4

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 7,582 shares

Expires 2025-11-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: The stock option is fully vested. After this exercise of 7,582 options, there are no options remaining under the related grant.

SEC source: 0000950157-25-000941 · form4.xml · nonDerivative · entry 2

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,484

F2 · shares: The options exercise was executed in anticipation of the November 12, 2025 expiration date on a net settlement basis.

SEC source: 0000950157-25-000941 · form4.xml · nonDerivative · entry 1

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,323

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 8 shares of Class B Common Stock held by the reporting person in his Graham Holdings Company 401(k) plan account.

SEC source: 0001628280-25-045868 · wk-form4_1761164226.xml · nonDerivative · entry 2

Maas, Jacob · CIK 0001655513 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,034

F4 · shares: Represents withholding of Class B shares for the tax liability associated with the vesting and settlement of the restricted stock unit award referred to in footnote 1 above.

SEC source: 0001628280-25-045868 · wk-form4_1761164226.xml · nonDerivative · entry 1

Maas, Jacob · CIK 0001655513 · Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,535

F1 · security: On January 19, 2022, the reporting person received a restricted stock unit award (Award) with price-based vesting conditions. The terms of the Award provide that 1,000 shares vest if the issuer's Class B Common Stock's closing price meets or exceeds $700 for 90 consecutive calendar days on or before December 31, 2027, with an additional 1,000 shares vesting following each additional incremental increase of $100 in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027. On November 5, 2024, the first 1,000 shares vested following achievement of the first stock price goal. On January 27, 2025, the second 1,000 shares vested following achievement of the second stock price goal. On October 20, 2025, the third 1,000 shares vested following achievement of the third stock price goal.

F2 · kind: Represents the fourth tranche of the Award, which will vest if the closing price of the issuer's Class B Common Stock exceeds $1,000 for 90 consecutive calendar days on or before December 31, 2027. As noted above, if such price-based vesting condition is satisfied, the reporting person is eligible for vesting of additional 1,000 share increments of Class B Common Stock for each additional $100 increase in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027 (e.g., if the closing price of the issuer's Class B Common Stock exceeds $1,100 for 90 consecutive calendar days, then 1,000 additional shares of Class B Common stock will vest).

F2 · shares: Represents the fourth tranche of the Award, which will vest if the closing price of the issuer's Class B Common Stock exceeds $1,000 for 90 consecutive calendar days on or before December 31, 2027. As noted above, if such price-based vesting condition is satisfied, the reporting person is eligible for vesting of additional 1,000 share increments of Class B Common Stock for each additional $100 increase in the closing price of the issuer's Class B Common Stock maintained for 90 consecutive days on or before December 31, 2027 (e.g., if the closing price of the issuer's Class B Common Stock exceeds $1,100 for 90 consecutive calendar days, then 1,000 additional shares of Class B Common stock will vest).

F3 · price: N/A

SEC source: 0000950157-25-000854 · form4.xml · derivative · entry 3

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 5,500

Underlying: Class B Common Stock · 2,800 shares

Expires not disclosed

F5 · derivative.exercise_price: 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.

F6 · kind: Exchange of Class A shares to be held by the spouse of the reporting person for the equivalent number of Class B shares.

F3 · price: N/A

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0000950157-25-000854 · form4.xml · nonDerivative · entry 1

O'Shaughnessy Timothy J · CIK 0001621362 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,741

F2 · kind: Exchange of Class B shares held directly by the reporting person for the equivalent number of Class A shares.

F3 · price: N/A

F1 · balance_after: Includes 8 shares of Class B Common Stock held by the reporting person in his Graham Holdings Company 401(k) plan account.