Mason Hawkins Portfolio Analysis: Top Holdings and Concentration

As of December 31, 2025, Mason Hawkins' portfolio at Longleaf Partners shows significant concentration in specific sectors and holdings. The analysis focuses on the largest positions and their performance changes.

The largest position is CNX Res Corp (CNX), representing 7.76% of the portfolio. This Energy sector holding saw a slight decrease in shares (-0.35%) compared to the previous period.

Mattel Inc (MAT), a Consumer Cyclical stock, holds the second-largest position at 7.57%. This position saw substantial growth with a 5.01% increase in shares.

IAC Inc (IAC), a Communication Services company, makes up 6.95% of the portfolio. This position experienced a significant increase, with a 44.15% jump in shares during the period.

Regeneron Pharmaceuticals (REGN) is positioned at 5.7% in the Healthcare sector. This holding also showed strong growth, with a 14.65% increase in shares.

PotlatchDeltic Corporation (PCH), representing 5.6% of the portfolio, is another key holding in the Real Estate sector. This position saw an impressive 48.37% increase in shares.

Rayonier Inc (RYN), another Real Estate holding, accounts for 5.48% of the portfolio. This position also showed strong growth with a 26.29% increase in shares.

Kraft Heinz Co (KHC) holds a 4.85% position in the Consumer Defensive sector. This holding saw a 23.39% increase in shares during the period.

Albertsons Cos Inc (ACI), also in Consumer Defensive, represents 4.72% of the portfolio. This position saw a 24.73% increase in shares.

For more information on Mason Hawkins' investment profile, visit https://www.insiderset.com/investor/mason-hawkins-longleaf-partners. Detailed analysis of each stock can be found at CNX, MAT, IAC, REGN, PCH, RYN, KHC, and ACI.