Mason Hawkins

Across Mason Hawkins’s registered funds — $2.96B disclosed in SEC Form N-PORT — just 59.4% sits in US-listed equity, the only slice a 13F reports. The other $1.20B is foreign listings and cash — none of which a 13F can show.

From SEC Form N-PORT, which registered funds file with their full portfolio — every currency, asset class and short. Covers 4 funds. The percentage above is the composition of those funds, not a ratio between two filings: a 13F spans every discretionary account but only US-listed securities, while N-PORT covers only the registered funds but every asset inside them — different universes, so the totals are not comparable (the 13F itself reports $1.92B for 2026-06-30). None of this feeds the backtest above, which stays a pure 13F clone.

About Mason Hawkins

Mason Hawkins founded Southeastern Asset Management in Memphis in 1975 and has run it on a consistent framework for five decades: concentrated, long-only equity in businesses trading at a meaningful discount to his estimate of intrinsic value, with a willingness to hold for years and engage management when necessary. The current 13F reflects that discipline — 49 positions, top-5 at 42%, with names like Rayonier (RYN), Mattel (MAT), and IAC representing the kind of out-of-favor, asset-heavy or misunderstood businesses Southeastern targets. Hawkins is most associated with the Longleaf Partners funds, whose long-term record established him as a canonical figure in domestic value investing, though the strategy has faced persistent headwinds during growth-dominated markets; the backtest here shows roughly -5.8% annual excess return versus SPY over twelve years. The 13F captures the book well — Southeastern runs long-only domestic equity without the derivatives overlays or short books that would distort a filing read.