Mason Hawkins - Longleaf Partners 13F Activity & Position Changes (Q2 2026)

According to the SEC 13F filed on Aug 14, 2026, the Longleaf Partners portfolio showed several notable changes in holdings as of quarter-end Jun 30, 2026. The activity included new positions, additions to existing holdings, reductions, and complete exits, providing a clear view of how the portfolio evolved during the quarter.

During Q2 2026, the filing reported:

New Buys - Abbott Laboratories, Tencent Music Entertainment Gro

Increases - Albertsons Companies, Inc., Avantor, Inc., Clearwater Paper Corporation, CNX Resources Corporation, Empire State Realty Trust, Inc., and 2 more

Reductions - ACM Research, Inc., Atlanta Braves Holdings, Inc. -, CNH Industrial, New Oriental Education & Techno, Fortune Brands Innovations, Inc, and 17 more

Complete Exits - Bio-Rad Laboratories, Inc., Fiserv, Inc., Constellation Brands, Inc.

These updates highlight how the portfolio adjusted across different sectors and market conditions, offering insights into allocation shifts and investment trends.

Date	Symbol	Name	Type	Change Qty	% Change	Value	Remaining
Q2 2026	ABT Abbott Laboratories	Abbott Laboratories	Buy - Position Entry	+840,747	-	$76.29M	840,747
Q2 2026	ACI Albertsons Companies, Inc.	Albertsons Companies, Inc.	Buy	+1,216,461	+16.4%	$116.85M	8,636,262
Q2 2026	ACMR ACM Research, Inc.	ACM Research, Inc.	Sell	-643,422	-82.2%	$17.70M	139,478
Q2 2026	AVTR Avantor, Inc.	Avantor, Inc.	Buy	+1,205,266	+34.2%	$46.78M	4,725,478
Q2 2026	BATRK Atlanta Braves Holdings, Inc. -	Atlanta Braves Holdings, Inc. -	Sell	-65,923	-9.8%	$31.40M	605,091
Q2 2026	BIO Bio-Rad Laboratories, Inc.	Bio-Rad Laboratories, Inc.	Sell - Position Exit	-162,804	-100.0%	$0.00	-
Q2 2026	CLW Clearwater Paper Corporation	Clearwater Paper Corporation	Buy	+14,065	+0.9%	$24.14M	1,539,556
Q2 2026	CNH CNH Industrial	CNH Industrial	Sell	-198,538	-5.3%	$39.51M	3,518,270
Q2 2026	CNX CNX Resources Corporation	CNX Resources Corporation	Buy	+648,942	+16.2%	$158.22M	4,663,053
Q2 2026	EDU New Oriental Education & Techno	New Oriental Education & Techno	Sell	-110,682	-21.2%	$18.90M	411,598
Q2 2026	ESRT Empire State Realty Trust, Inc.	Empire State Realty Trust, Inc.	Buy	+2,223,117	+34.3%	$47.05M	8,696,434
Q2 2026	FBIN Fortune Brands Innovations, Inc	Fortune Brands Innovations, Inc	Sell	-466,176	-21.6%	$92.62M	1,687,109
Q2 2026	FDX FedEx Corporation	FedEx Corporation	Sell	-52,667	-21.3%	$61.01M	194,828
Q2 2026	FI Fiserv, Inc.	Fiserv, Inc.	Sell - Position Exit	-3,990	-100.0%	$0.00	-
Q2 2026	FIS Fidelity National Information S	Fidelity National Information S	Sell	-58,364	-7.1%	$29.90M	769,137
Q2 2026	G27907107 Dole	Dole	Sell	-181,553	-9.4%	$24.04M	1,752,155
Q2 2026	G9618E107 White Mountains	White Mountains	Sell	-1,760	-9.3%	$35.46M	17,104
Q2 2026	GHC Graham Holdings Company	Graham Holdings Company	Sell	-8,604	-22.8%	$33.28M	29,156
Q2 2026	HTHT H World Group Limited	H World Group Limited	Sell	-25,690	-11.1%	$8.58M	205,682
Q2 2026	IAC IAC Inc.	IAC Inc.	Sell	-890,894	-22.1%	$144.57M	3,131,835
Q2 2026	KHC The Kraft Heinz Company	The Kraft Heinz Company	Sell	-340,767	-8.6%	$85.22M	3,607,946
Q2 2026	KSPI Joint Stock Company Kaspi.kz -	Joint Stock Company Kaspi.kz -	Sell	-27,629	-11.5%	$18.45M	212,999
Q2 2026	MAT Mattel, Inc.	Mattel, Inc.	Sell	-489,602	-3.8%	$171.04M	12,322,555
Q2 2026	MGM MGM Resorts International	MGM Resorts International	Sell	-493,448	-29.7%	$55.91M	1,169,513
Q2 2026	MLCO Melco Resorts & Entertainment L	Melco Resorts & Entertainment L	Sell	-189,400	-10.5%	$8.47M	1,607,854
Q2 2026	PVH PVH Corp.	PVH Corp.	Sell	-107,038	-14.5%	$46.78M	629,897
Q2 2026	REGN Regeneron Pharmaceuticals, Inc.	Regeneron Pharmaceuticals, Inc.	Buy	+21,660	+16.6%	$94.98M	152,322
Q2 2026	RYN Rayonier Inc. REIT	Rayonier Inc. REIT	Sell	-1,271,296	-11.8%	$201.98M	9,491,347
Q2 2026	SAM Boston Beer Company, Inc. (The)	Boston Beer Company, Inc. (The)	Buy	+27,642	+23.3%	$25.85M	146,043
Q2 2026	SHEN Shenandoah Telecommunications C	Shenandoah Telecommunications C	Sell	-323,499	-11.0%	$39.46M	2,616,797

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