Mason Hawkins - Longleaf Partners Portfolio (Q1 2026)

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Longleaf Partners, Mason Hawkins, has built a diversified portfolio of 45 publicly traded holdings with a total market value of $2.0B as of Mar 31, 2026. This comprehensive analysis examines the latest 13F filing data to understand the investment strategy and recent portfolio adjustments.

The portfolio demonstrates a concentrated approach to stock selection, with the top holding representing 10.9% of the total portfolio value. The top 5 holdings account for 41.8% of the overall portfolio allocation.

Recent portfolio activity shows 10 significant position adjustments, indicating active portfolio management and strategic repositioning. These changes reflect the investor's response to market conditions and evolving investment thesis.

Portfolio Statistics

45
Total Holdings
$2.0B
Portfolio Value
Mar 31, 2026
Latest Filing
10.9%
Largest Position

Top Holdings Analysis

The portfolio's top holdings reveal the investor's core investment thesis and sector preferences. The largest position in RAYONIER INC (RYN) represents 10.9% of the total portfolio, valued at $221.9M.

Rank Symbol Company Value Portfolio % Change
1 RYN RAYONIER INC $221.9M 10.9% +89.5%
2 MAT MATTEL INC $186.2M 9.2% +49.5%
3 IAC IAC INC $161.0M 7.9% +0.8%
4 CNX CNX RES CORP $154.7M 7.6% -15.2%
5 ACI ALBERTSONS COS INC $126.4M 6.2% +20.3%

For a complete analysis of all holdings and detailed portfolio breakdown by sector and market cap, visit our comprehensive holdings page.

Recent Portfolio Activity

Recent portfolio adjustments provide insights into the investor's evolving strategy and market outlook. The following table shows the top 10 most significant position changes from recent reporting periods (out of 159 total transactions), sorted by the magnitude of change.

For a complete history of all portfolio transactions and detailed activity analysis, visit our comprehensive activity page.

Symbol Company Quantity Change Date Action
RYN Rayonier Inc. REIT +5,083,702 Mar 31, 2026 BUY
MAT Mattel, Inc. +4,241,829 Mar 31, 2026 BUY
PCH PotlatchDeltic Corporation - Co -3,162,963 Mar 31, 2026 SELL
ESRT Empire State Realty Trust, Inc. +2,769,081 Mar 31, 2026 BUY
TRIP TripAdvisor, Inc. +1,759,811 Mar 31, 2026 BUY
ACI Albertsons Companies, Inc. +1,253,089 Mar 31, 2026 BUY
FBIN Fortune Brands Innovations, Inc +975,182 Mar 31, 2026 BUY
ACMR ACM Research, Inc. -897,281 Mar 31, 2026 SELL
CNX CNX Resources Corporation -721,713 Mar 31, 2026 SELL
KHC The Kraft Heinz Company -539,403 Mar 31, 2026 SELL

Investment Strategy Insights

Longleaf Partners's investment approach can be analyzed through several key metrics. The portfolio's concentration in top holdings suggests a high-conviction investment strategy, with significant positions in companies that align with the investor's long-term thesis.

The largest position in RAYONIER INC (RYN) demonstrates strong conviction in this particular investment opportunity. Recent activity shows a increase of 89.5% in this position, indicating active portfolio management and strategic positioning.

Portfolio turnover can be assessed through recent activity patterns. The 10 most significant transactions shown here (out of 159 total transactions) suggest a highly active approach to portfolio management, with frequent strategic adjustments and position changes.

Additional Analysis

Complete Holdings

View all 45 holdings with detailed analysis

Trading Activity

Track all portfolio transactions and position changes

Performance Metrics

Analyze profit, winning trades, and investment returns

Sector Allocation

Analyze portfolio breakdown by sector and industry

Longleaf Partners's portfolio as of Mar 31, 2026 reflects a strategic approach to equity investing with 45 holdings valued at $2.0B. The concentrated position in RAYONIER INC and other top holdings demonstrates the investor's confidence in specific investment themes and long-term value creation opportunities. Recent activity indicates ongoing portfolio optimization and strategic repositioning.

For the most current portfolio data and detailed analysis, refer to the latest SEC 13F filings and our comprehensive holdings and activity pages, which are updated regularly with the latest filing information.

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