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Washington Post Co
TickerGHC
CIK #0000104889
CUSIP384637104
SectorTrade & Services - Services-Educational Services
Address1150 15th St NW, Washington, DC 20071
Source [EDGAR]
CIK Filing 2011 - 2026
[0000104889] 10-K
[0000104889] 10-Q
[0000104889] 13F-HR
[0000104889] 3
[0000104889] 4
[0000104889] 5
[0000104889] 8-K
[0000104889] SC 13D
[0000104889] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Capital Management LLC Graham Holdings Co [2026-04-30] 0.0
Vanguard Portfolio Management LLC Graham Holdings Co [2026-04-29] 0.0
O'shaughnessy Laura Graham Holdings Co [2024-09-05] 10.8
Graham Holdings Co Pubmatic Inc [2024-08-20] 5.7
Madison Avenue Partners LP Graham Holdings Co [2024-05-30] 6.4
Weymouth Elizabeth G Graham Holdings Co [2024-05-13] 5.8
O'shaughnessy Timothy J Graham Holdings Co [2024-05-10] 5.8
O'shaughnessy Laura Graham Holdings Co [2024-05-10] 5.6
Fiduciary Management Inc /WI/ Graham Holdings Co [2020-02-11] 12.0
Fiduciary Management Inc /WI/ Graham Holdings Co [2019-02-14] 5.04
Dimensional Fund Advisors LP Graham Holdings Co [2018-02-09] 5.49
van Eck Associates Corp Graham Holdings Co [2017-04-07] 37.51
Schroder Investment Management North America INC/ de Graham Holdings Co [2017-02-10] 2.971
Capital Research Global Investors Graham Holdings Co [2016-02-16] 6.9
Graham Holdings Co Columbus McKinnon Corp [2016-02-01] 8.83
Graham Holdings Co SmartPros Ltd [2015-11-02] 29.9
Schroder Investment Management North America INC/ de Graham Holdings Co [2015-02-13] 4.345
Vanguard Group Inc Graham Holdings Co [2015-02-10] 5.31
BlackRock Inc Graham Holdings Co [2015-02-03] 5.1
Form 3/4/5 Filer 2011 - 2026
Markell Jack A
Graham Holdings Co
Mulcahy Anne M
Wagoner G Richard Jr
Conley Danielle Y
Davis Christopher C
Weymouth Katharine
O'shaughnessy Laura
O'shaughnessy Timothy J
Allen Tony
Maas Jacob
Cooney Wallace R
Rosen Andrew Stephen
Maddrey Nicole Marie
Stonesifer Sandra M
Snyman Marcel A
Gayner Thomas Sinnickson
Bollinger Lee C
Graham Donald
Demeter Denise M
Shelton James H
SmartPros Ltd
Cable One Inc
McDaniel Ann
Rosberg Gerald M
Jones Hal
Dillon Veronica
Buffett Warren E
Berkshire Hathaway Inc
National Indemnity Co
Goldberg David Bruce
Thompson Larry D
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Maas Jacob
Class B Common Stock
2026-01-16 Tax withheld 377 $1,150.50 433,738
Maas Jacob
Class B Common Stock
2026-01-16 Grant 1,000 $0.00
Mulcahy Anne M
Class B Common Stock
2026-01-02 Grant 22 $1,091.18 24,006
Wagoner G Richard Jr
Class B Common Stock
2026-01-02 Grant 22 $1,091.18 24,006
Conley Danielle Y
Class B Common Stock
2026-01-02 Grant 20 $1,091.18 21,824
Davis Christopher C
Class B Common Stock
2026-01-02 Grant 25 $1,091.18 27,280
Markell Jack A
Class B Common Stock
2026-01-02 Grant 8 $1,091.18 8,729
Weymouth Katharine
Class A Common Stock · derivative
2025-12-29 Other 36,000
O'shaughnessy Laura
Employee Stock Option (Right to Buy) · derivative
2025-11-11 Option exercise 7,582 $0.00
O'shaughnessy Timothy J
Class B Common Stock
2025-11-11 Tax withheld 6,839 $1,085.29 7,422,298
O'shaughnessy Timothy J
Class B Common Stock
2025-11-11 Option exercise 7,582 $872.01 6,611,580
O'shaughnessy Laura
Class B Common Stock
2025-11-11 Option exercise 7,582 $872.01 6,611,580
O'shaughnessy Timothy J
Employee Stock Option (Right to Buy) · derivative
2025-11-11 Option exercise 7,582 $0.00
O'shaughnessy Laura
Class B Common Stock
2025-11-11 Tax withheld 6,839 $1,085.29 7,422,298
Maas Jacob
Class B Common Stock
2025-10-20 Tax withheld 501 $987.72 494,848
Maas Jacob
Class B Common Stock
2025-10-20 Grant 1,000 $0.00
O'shaughnessy Timothy J
Class A Common Stock · derivative
2025-10-07 Other 2,800
O'shaughnessy Laura
Class A Common Stock · derivative
2025-10-07 Other 2,800
O'shaughnessy Timothy J
Class B Common Stock
2025-10-07 Other 2,800
O'shaughnessy Laura
Class B Common Stock
2025-10-07 Other 2,800
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 328 2,674,404
2025-12-31 348 2,679,637
2025-09-30 325 2,714,365
2025-06-30 309 2,687,884
2025-03-31 294 2,597,632
2024-12-31 286 2,561,464
2024-09-30 262 2,618,897
2024-06-30 250 2,678,338
2024-03-31 247 2,773,481
2023-12-31 246 2,774,730
2023-09-30 247 2,738,160
2023-06-30 251 2,827,622
Form 13F Holdings
Firm Period DFND Voting Shares
Linden Thomas Advisory Services LLC [2026-06-30] SOLE 0 3,801
MRAZ Amerine & Associates Inc [2026-06-30] SOLE 0 3,357
AMI Investment Management Inc [2026-06-30] SOLE 0 2,566
Cohen Klingenstein LLC [2026-06-30] SOLE 2,000 2,000
Norman Fields Gottscho Capital Management LLC [2026-06-30] SOLE 0 1,407
Alaska Retirement Management Board [2026-06-30] SOLE 14,652 1,093
Louisiana State Employees Retirement System [2026-06-30] SOLE 1,000 1,000
Yousif Capital Management LLC [2026-06-30] SOLE 275 927
QRG Capital Management Inc [2026-06-30] SOLE 920 920
Howard Financial Services Ltd [2026-06-30] SOLE 0 844
Commonwealth of Pennsylvania Public School Empls Retrmt SYS [2026-06-30] SOLE 800 800
Handelsbanken Fonder AB [2026-06-30] SOLE 0 793
Davenport & Company LLC [2026-06-30] SOLE 350 570
Sequoia Financial Advisors LLC [2026-06-30] SOLE 0 500
Palisade Asset Management LLC [2026-06-30] SOLE 478 478
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 14 440
Atticus Wealth Management LLC [2026-06-30] SOLE 0 438
Sterling Investment Counsel LLC [2026-06-30] SOLE 405 405
Folger Nolan Fleming Douglas Capital Management Inc [2026-06-30] SOLE 0 332
Crossmark Global Holdings Inc [2026-06-30] SOLE 224 224
Baron Wealth Management LLC [2026-06-30] SOLE 4 206
Lexington Hill Partners LLC [2026-06-30] SOLE 0 201
Live Oak Private Wealth LLC [2026-06-30] SOLE 200 200
IFP Advisors LLC [2026-06-30] SOLE 43 43
Salem Investment Counselors Inc [2026-06-30] SOLE 30 40
Versant Capital Management Inc [2026-06-30] SOLE 33 33
Gamma Investing LLC [2026-06-30] DFND 33 33
First Pacific Financial [2026-06-30] SOLE 0 12
Farther Finance Advisors LLC [2026-06-30] SOLE 0 11
Torren Management LLC [2026-06-30] SOLE 0 10
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