Graham Holdings Co

CIK

104889

City

ARLINGTON

State / Country

VA

Stock

PUBM — PubMatic, Inc.

Top Portfolio Positions

3 positions · $150,540,189 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio	Open
MKL	Markel Group Inc. Financial Services	55,430	$106,096,894	70.48%
PUBM	PubMatic, Inc. Technology	3,398,904	$27,803,034	18.47%
CABO	Cable One, Inc. Communication Services	182,439	$16,640,261	11.05%

Portfolio Trend

18 quarters · across all stocks

Holdings in PUBM

Compact Export CSV

Shares Held

Position Value (USD)

16 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$27,803,034	3,398,904	+20.0%	Shares	Sole	2026-05-15
2025-12-31	$25,115,067	2,831,462	0.0%	Shares	Sole	2026-02-13
2025-09-30	$23,444,505	2,831,462	0.0%	Shares	Sole	2025-11-14
2025-06-30	$35,223,387	2,831,462	0.0%	Shares	Sole	2025-08-14
2025-03-31	$25,879,562	2,831,462	+21.4%	Shares	Sole	2025-05-15
2024-12-31	$34,249,176	2,331,462	0.0%	Shares	Sole	2025-02-14
2024-09-30	$34,668,839	2,331,462	+18.1%	Shares	Sole	2024-11-14
2024-06-30	$40,078,007	1,973,314	0.0%	Shares	Sole	2024-08-14
2024-03-31	$46,807,008	1,973,314	0.0%	Shares	Sole	2024-05-16
2023-12-31	$32,184,751	1,973,314	0.0%	Shares	Sole	2024-02-14
2023-09-30	$23,877,099	1,973,314	0.0%	Shares	Sole	2023-11-14
2023-06-30	$36,072,179	1,973,314	0.0%	Shares	Sole	2023-08-14
2023-03-31	$27,271,199	1,973,314	+21.3%	Shares	Sole	2023-05-15
2022-12-31	$20,839,448	1,626,811	+50.4%	Shares	Sole	2023-02-14
2022-09-30	$17,990,516	1,081,811	+27.0%	Shares	Sole	2022-11-15
2022-06-30	$13,536,611	851,895	—	Shares	Sole	2022-08-15
No 13F history on record for this holder in this stock.