Mason Hawkins Holdings 13F: Latest Southeastern Asset Management Portfolio Changes
Southeastern Asset Management. Deep value, concentrated portfolio. Mason Hawkins is a classic, Graham-and-Dodd style value investor. His firm is known for taking large, concentrated positions in heavily discounted businesses and engaging constructively with management.
As of the latest Q1 2026 13F filing, Mason Hawkins (managing Southeastern Asset Management) reported a public portfolio value of $2.0B with 49 positions. This page tracks latest holdings, latest 13F changes, top buys, top sells, and top holdings from the public filing. The top recent buy was RYN. The top recent sell was CNX.
Open interactive portfolioLatest 13F portfolio changes
Mason Hawkins holdings 13F summary: the latest Southeastern Asset Management portfolio changes show top holdings including RAYONIER, MATTEL, IAC, CNX RES, and ALBERTSONS COS, reported top buys such as RAYONIER, MATTEL, IAC, and ALBERTSONS COS, and top sells or reductions such as CNX RES, POTLATCHDELTIC, REGENERON PHARMACEUTICALS, and KRAFT HEINZ.
Latest filing metadata: quarter Q1 2026; report date 2026-03-31; filing date 2026-05-15; disclosure source SEC 13F.
Mason Hawkins 13F portfolio and latest holdings overview
Mason Hawkins's Q1 2026 13F holdings show Southeastern Asset Management reporting 49 positions with a disclosed portfolio value of $2.0B. For readers searching Mason Hawkins 13F holdings, Mason Hawkins portfolio, Southeastern Asset Management holdings, or latest 13F changes, the latest top holdings include RAYONIER, MATTEL, IAC, CNX RES, and ALBERTSONS COS.
The three largest reported positions add up to roughly 28.0%, which helps readers judge portfolio concentration rather than just headline AUM. The largest reported sector exposure is Other at 67.8% of the disclosed portfolio. This makes the page useful for comparing the manager's actual disclosed exposure with market narratives around the same names.
The latest change data highlights reported buys such as RAYONIER, MATTEL, IAC, ALBERTSONS COS, and FORTUNE BRANDS INNOVATIONS I and reported reductions or exits such as CNX RES, POTLATCHDELTIC, REGENERON PHARMACEUTICALS, KRAFT HEINZ, and FEDEX. Those changes should be read as historical disclosure signals, not as real-time trade alerts.
The filing metadata lists report date 2026-03-31, filing date 2026-05-15, SEC accession 0001398344-26-009296. SEC 13F reports are normally published up to 45 days after quarter end, so the data is best used to understand institutional positioning after the fact rather than to infer today's exact portfolio.
Mason Hawkins portfolio analytics
the top five positions account for 41.8% of disclosed value; the largest sector exposure is Consumer Discretionary at 9.2%; reported buy and sell activity implies roughly 94.5% turnover this period; cost-basis P&L across 48 tracked positions averages 13.1% (16/27 currently in profit).
Top reported holdings
| Holding | Reported value | Weight | Quarter change |
|---|---|---|---|
| RYN whale holders RAYONIER INC | $221.9M | 10.9% | Increased |
| MAT whale holders MATTEL INC | $186.2M | 9.2% | Increased |
| IAC whale holders IAC INC | $161.0M | 7.9% | Increased |
| CNX whale holders CNX RES CORP | $154.7M | 7.6% | Reduced |
| ACI whale holders ALBERTSONS COS INC | $126.4M | 6.2% | Increased |
| REGN whale holders REGENERON PHARMACEUTICALS | $101.0M | 5.0% | Reduced |
| KHC whale holders KRAFT HEINZ CO | $88.8M | 4.4% | Reduced |
| FDX whale holders FEDEX CORP | $88.2M | 4.3% | Reduced |
| FBIN whale holders FORTUNE BRANDS INNOVATIONS I | $83.9M | 4.1% | Increased |
| MGM whale holders MGM RESORTS INTERNATIONAL | $61.5M | 3.0% | Reduced |
Top buys
- RYN whale holders — RAYONIER INC ($221.9M)
- MAT whale holders — MATTEL INC ($186.2M)
- IAC whale holders — IAC INC ($161.0M)
- ACI whale holders — ALBERTSONS COS INC ($126.4M)
- FBIN whale holders — FORTUNE BRANDS INNOVATIONS I ($83.9M)
- TRIP whale holders — TRIPADVISOR INC ($49.0M)
Top sells
- CNX whale holders — CNX RES CORP ($154.7M)
- N/A whale holders — POTLATCHDELTIC CORPORATION ($125.8M)
- REGN whale holders — REGENERON PHARMACEUTICALS ($101.0M)
- KHC whale holders — KRAFT HEINZ CO ($88.8M)
- FDX whale holders — FEDEX CORP ($88.2M)
- MGM whale holders — MGM RESORTS INTERNATIONAL ($61.5M)
Allocation
- Other: 67.8%
- Consumer Discretionary: 9.2%
- Health Care: 6.4%
- Industrials: 4.5%
- Consumer Staples: 4.4%
- Information Technology: 3.4%
- Communication Services: 2.6%
- Real Estate: 1.7%
Data notes
Report date: 2026-03-31
Disclosure source: SEC 13F
SEC 13F filings are delayed public disclosures and do not include every asset class, short positions, or real-time trades.
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Frequently asked questions
Mason Hawkins 13F Holdings
The Q1 2026 13F profile for Mason Hawkins and Southeastern Asset Management shows 49 reported positions, $2.0B in disclosed portfolio value, and top holdings including RAYONIER, MATTEL, IAC, CNX RES, and ALBERTSONS COS.
What is Mason Hawkins buying? Latest 13F changes
The latest tracked change data for Mason Hawkins highlights reported buys such as RAYONIER, MATTEL, IAC, and ALBERTSONS COS and reported sells or reductions such as CNX RES, POTLATCHDELTIC, REGENERON PHARMACEUTICALS, and KRAFT HEINZ.
Southeastern Asset Management top holdings
Southeastern Asset Management top holdings are summarized from public disclosures with reported values, weights, portfolio concentration, top buys, top sells, and filing metadata where available.
Mason Hawkins buys and sells
Use the top buys and top sells sections above to compare Mason Hawkins's reported additions, reductions, exits, and latest portfolio activity against other tracked investors.
How delayed is Mason Hawkins's 13F data?
SEC Form 13F requires institutional investment managers with $100M+ in US equities to disclose their holdings quarterly. Read our comprehensive 13F guide for timing, coverage, and limitations. Read the Whale Analyzer 13F guide.