SOUTHEASTERN ASSET MANAGEMENT INC/TN/ is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $2.2B in reported equity holdings across 53 positions. The largest holdings are CNX (7.8%), MAT (7.6%), IAC (6.9%), REGN (5.7%), POTLATCHDE (5.6%). The portfolio is concentrated in Other (75.3%), Energy (7.8%), Industrials (4.6%). Data sourced from SEC EDGAR 13F filings (CIK 807985).