Mason Hawkins - Longleaf Partners Investment Strategy (Sep 30, 2025)
As of Sep 30, 2025, the Longleaf Partners portfolio managed by Mason Hawkins demonstrates a sophisticated investment approach with 74 positions and an average holding period of 939 quarters. The strategy focuses on Basic Materials, Communication Services, Consumer Cyclical, Consumer Defensive, Energy, Financial Services, Healthcare, Industrials, Real Estate, Technology sectors with a typical position size of 1.5% of the portfolio.
The portfolio's risk management approach includes a maximum position size of 1.54% and sector diversification of 10%, exemplified by the case study of CNX RES CORP (CNX). This strategic framework provides insights into Mason Hawkins's investment philosophy, risk management practices, and long-term value creation approach.
Investment Strategy Metrics
Key metrics revealing investment style, risk management, and performance characteristics
| Metric | Value | Category | Description |
|---|---|---|---|
| Holding Period | 2.6 years | Style | Average duration positions are maintained |
| Position Count | 74 | Style | Number of active positions in portfolio |
| Position Size | 1.5% | Risk | Typical allocation per position |
| Win Rate | 48.2% | Performance | Percentage of profitable positions |
| Average Return | 233.5% | Performance | Mean return across positions |
| Sharpe Ratio | 0.26 | Performance | Return per unit of risk taken |
Investment Case Study: CNX RES CORP (CNX)
9/30/2024 - 12/26/2025
Performance Metrics
Total Return: -10.43%
Holding Period: 452 days
Max Position Size: $201,022,106.00
Position Weight: 8.13%
Key Events
Investment Thesis
Entry Context: Initial position established based on fundamental analysis
Sector Conditions: Favorable market conditions in the sector
- Market volatility
- Sector-specific risks
Key Learnings
- Position sizing is critical for portfolio management
- Important to monitor sector exposure