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Southeastern Asset Management, Inc.
O. Mason Hawkins · Asset Manager · Value
Southeastern Asset Management, Inc. is an independent, employee-owned investment management firm founded in 1975 by O. Mason Hawkins. Headquartered in Memphis, Tennessee, the firm is globally recognized for managing the Longleaf Partners Funds through a disciplined, long-term value investing lens. Southeastern focuses on a concentrated portfolio strategy, typically holding between 18 and 22 equity positions across its various mandates. The firm employs a rigorous bottom-up research process to identify high-quality businesses with strong competitive advantages and capable management teams that trade at significant discounts to their intrinsic value. Over its five-decade history, the firm has remained committed to a partnership-driven culture, aligning employee interests with clients by investing significantly alongside them.
Simulated Performance
| Metric | Value |
|---|---|
| Total return | +1.0% |
| YTD return | -4.3% |
| Sharpe ratio | 2.89 |
| Win rate | 60% |
| AUM | $1.8B |
| Inception | Oct 1, 2025 |
| Updated | Sep 18, 2026 |
Institution Status
| Field | Value |
|---|---|
| AUM | $1.8B |
| Turnover | Low (<15%) |
| Avg holding | 18 Months |
| Inception | Oct 1, 2025 |
| Website | https://www.southeasternasset.com |
Current Holdings
Updated on Sep 18, 2026.
| Ticker | Name | Portfolio % | Return |
|---|---|---|---|
| RYN | Rayonier Inc | 12.8% | -9.8% |
| MAT | Mattel Inc | 10.8% | -19.8% |
| IAC | IAC Inc. | 10.2% | +21.9% |
| CNX | CNX Resources Corp | 7.7% | -5.2% |
| ACI | Albertsons Companies | 6.5% | -28.1% |
| FDX | FedEx Corporation | 5.7% | +13.6% |
| KHC | Kraft Heinz Co | 5.4% | -2.8% |
| FBIN | Fortune Brands Innovations Inc. | 4.8% | -14.9% |
| REGN | Regeneron Pharmaceuticals Inc | 4.5% | +25.2% |
| MGM | MGM Resorts International | 4.1% | +8.9% |
| PVH | PVH Corp | 3.9% | -7.0% |
| ACMR | Acm Research Inc | 3.9% | +44.3% |
| TRIP | TripAdvisor Inc | 2.9% | -11.6% |
| BIO | Bio-Rad Laboratories Inc | 2.9% | +28.2% |
| SHEN | Shenandoah Telecommunications Co | 2.6% | -15.2% |
| GLAPY | Glanbia PLC ADR | 2.5% | +0.0% |
| GHC | Graham Holdings Co | 2.4% | +0.4% |
| WTM | White Mountains Insurance Group Ltd | 2.2% | +20.7% |
| CNH | CNH Industrial N.V. | 2.2% | +24.3% |
| ESRT | Empire State Realty Trust Inc | 2.1% | -32.1% |
Recent activity
| Date | Action | Ticker | Weight |
|---|---|---|---|
| Sep 14, 2026 | SELL | IAC | 10.2% → 0.0% |
| Sep 14, 2026 | SELL | WTM | 2.2% → 2.2% |
| Sep 14, 2026 | SELL | TRIP | 2.9% → 0.0% |
| Sep 14, 2026 | SELL | MAT | 10.8% → 10.6% |
| Sep 14, 2026 | BUY | ESRT | 2.1% → 2.3% |
Investment Style Analysis
Southeastern Asset Management, Inc. is widely recognized for employing a Value strategy. As of Sep 18, 2026, the firm oversees approximately $1.8B in assets under management (AUM). The portfolio demonstrates a clear preference for the REIT - Specialty and Leisure sectors, reflecting a high-conviction approach to capital allocation.
Recent Market Moves
During the latest rebalancing period ending Sep 14, Southeastern Asset Management, Inc. made a significant move by reducing the position in IAC. This adjustment aligns with the fund's dynamic approach to risk management and capital deployment in current market conditions.
Investment Philosophy
Southeastern follows a core investment philosophy based on three pillars: Business, People, and Price. The firm seeks to own high-quality, understandable businesses with sustainable competitive advantages and strong cash flow. They prioritize partnering with management teams and boards that think and act like owners, focusing on intelligent capital allocation. Southeastern demands a wide margin of safety, typically purchasing securities at 60% or less of their conservative appraisal of corporate intrinsic value. As long-term, concentrated investors with a typical five-year horizon, they act as business owners rather than traders, often engaging constructively with portfolio companies to help bridge the gap between market price and intrinsic value.
Disclaimer
The content provided on this page, including the simulated portfolio performance, holdings analysis, and AI-generated insights, is for informational and educational purposes only. It does not constitute financial advice, investment recommendations, or an offer to buy or sell any securities. All data is derived from historical SEC 13F filings and other public disclosures, which have a reporting lag. The "Simulated Performance" is a hypothetical reconstruction based on past disclosures and does not represent the actual returns of the institution. Past performance is not indicative of future results. Tritonix.ai is not affiliated with Southeastern Asset Management, Inc..
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Frequently asked questions
How is the simulated portfolio for Southeastern Asset Management, Inc. constructed?
This simulation is powered by Tritonix AI using official SEC filings. We focus on the "Best Ideas" by filtering for only the Top 20 largest holdings and rebalancing them to 100%. The simulation tracks performance starting from Oct 1, 2025. Our AI monitors for updates every Monday to capture major shifts. This concentrated approach highlights the manager's true stock-picking skill and mirrors their actual investment returns.
What is Southeastern Asset Management, Inc.'s largest holding?
As of the latest filing, Southeastern Asset Management, Inc.'s top position is Rayonier Inc (RYN), representing 12.8% of the portfolio. This reflects a high-conviction bet by the institution.
What is Southeastern Asset Management, Inc.'s historical performance and risk profile?
Our simulation indicates a total return of +1.0% with a win rate of 60%. Notably, the portfolio maintains a Sharpe Ratio of 2.89, suggesting an excellent level of risk-adjusted returns compared to the broader market.
What sectors does Southeastern Asset Management, Inc. primarily invest in?
Southeastern Asset Management, Inc. has a strong preference for the REIT - Specialty sector, which makes up 12.8% of their disclosed assets. The portfolio also has exposure to Leisure, indicating a specific thematic focus.
Is Southeastern Asset Management, Inc.'s portfolio concentrated or diversified?
Southeastern Asset Management, Inc. runs a moderately concentrated portfolio with 20 disclosed positions. The top 3 holdings alone account for 33.8% of the total portfolio weight, suggesting a strategy that favors broader market exposure.
How has Southeastern Asset Management, Inc. performed in 2026?
Our AI-simulated model portfolio for Southeastern Asset Management, Inc. tracks a Year-to-Date (YTD) return of -4.3%. This metric helps investors gauge the institution's effectiveness in the current market environment.
Does O. Mason Hawkins manage Southeastern Asset Management, Inc. directly?
Yes, O. Mason Hawkins serves as the key portfolio manager for Southeastern Asset Management, Inc., overseeing the investment strategy and final capital allocation decisions.