Mason Hawkins – Longleaf Partners Portfolio Activity & Recent Trades (Dec 31, 2025)
As of Dec 31, 2025, the Longleaf Partners portfolio activity showed several notable changes in holdings, according to the latest SEC 13F filing reported on Feb 13, 2026. The activity included new positions, additions to existing holdings, reductions, and complete exits, providing a clear view of how the portfolio evolved during the quarter.
During Q4 2025, the filing reported:
Increases – Albertsons Companies, Inc., ACM Research, Inc., Clearwater Paper Corporation, Walt Disney Company (The), Empire State Realty Trust, Inc., and 13 more
Reductions – Affiliated Managers Group, Inc., Avantor, Inc., Bio-Rad Laboratories, Inc., Cardinal Health, Inc., CNX Resources Corporation, and 17 more
Complete Exits –
None reported
These updates highlight how the portfolio adjusted across different sectors and market conditions, offering insights into allocation shifts and investment trends.
| Date | Symbol | Name | Type | Change Qty | % Change | Value | Remaining |
|---|---|---|---|---|---|---|---|
Q4 2025 | ACI Albertsons Companies, Inc. | Albertsons Companies, Inc. | Buy | +1,222,843 | +24.7% | $105.88M | 6,166,712 |
Q4 2025 | ACMR ACM Research, Inc. | ACM Research, Inc. | Buy | +194,494 | +13.1% | $66.28M | 1,680,181 |
Q4 2025 | AMG Affiliated Managers Group, Inc. | Affiliated Managers Group, Inc. | Sell | -1,276 | -18.7% | $1.60M | 5,562 |
Q4 2025 | AVTR Avantor, Inc. | Avantor, Inc. | Sell | -1,600,902 | -31.1% | $40.67M | 3,548,518 |
Q4 2025 | BIO Bio-Rad Laboratories, Inc. | Bio-Rad Laboratories, Inc. | Sell | -9,624 | -4.1% | $68.97M | 227,630 |
Q4 2025 | CAH Cardinal Health, Inc. | Cardinal Health, Inc. | Sell | -1,995 | -18.7% | $1.78M | 8,649 |
Q4 2025 | CLW Clearwater Paper Corporation | Clearwater Paper Corporation | Buy | +443,009 | +47.2% | $24.03M | 1,380,930 |
Q4 2025 | CNX CNX Resources Corporation | CNX Resources Corporation | Sell | -16,805 | -0.4% | $174.14M | 4,735,824 |
Q4 2025 | DIS Walt Disney Company (The) | Walt Disney Company (The) | Buy | +31,315 | +11.0% | $36.09M | 317,175 |
Q4 2025 | EDU New Oriental Education & Techno | New Oriental Education & Techno | Buy - Position Entry | +379,561 | - | $20.89M | 379,561 |
Q4 2025 | ENOV Enovis Corporation | Enovis Corporation | Sell | -10,203 | -18.7% | $1.18M | 44,258 |
Q4 2025 | ESRT Empire State Realty Trust, Inc. | Empire State Realty Trust, Inc. | Buy | +1,074,096 | +40.8% | $24.15M | 3,704,236 |
Q4 2025 | FBIN Fortune Brands Innovations, Inc | Fortune Brands Innovations, Inc | Buy | +162,501 | +16.0% | $58.93M | 1,178,103 |
Q4 2025 | FDX FedEx Corporation | FedEx Corporation | Sell | -15,258 | -4.1% | $103.74M | 359,122 |
Q4 2025 | FI Fiserv, Inc. | Fiserv, Inc. | Buy - Position Entry | +3,990 | - | $268.01K | 3,990 |
Q4 2025 | FIS Fidelity National Information S | Fidelity National Information S | Sell | -3,960 | -0.6% | $41.35M | 622,149 |
Q4 2025 | GHC Graham Holdings Company | Graham Holdings Company | Buy | +364 | +1.0% | $39.24M | 35,721 |
Q4 2025 | H Hyatt Hotels Corporation | Hyatt Hotels Corporation | Sell | -1,775 | -18.7% | $1.24M | 7,733 |
Q4 2025 | HDB HDFC Bank Limited | HDFC Bank Limited | Sell | -39,412 | -79.0% | $382.28K | 10,462 |
Q4 2025 | HSIC Henry Schein, Inc. | Henry Schein, Inc. | Sell | -3,924 | -18.7% | $1.29M | 17,038 |
Q4 2025 | HTHT H World Group Limited | H World Group Limited | Sell | -645,490 | -73.6% | $10.89M | 231,372 |
Q4 2025 | IAC IAC Inc. | IAC Inc. | Buy | +1,221,829 | +44.1% | $155.98M | 3,989,340 |
Q4 2025 | KHC The Kraft Heinz Company | The Kraft Heinz Company | Buy | +850,742 | +23.4% | $108.84M | 4,488,116 |
Q4 2025 | KSPI Joint Stock Company Kaspi.kz - | Joint Stock Company Kaspi.kz - | Buy | +62,184 | +34.8% | $18.80M | 240,628 |
Q4 2025 | LAZ Lazard, Inc. | Lazard, Inc. | Sell | -4,255 | -18.6% | $903.60K | 18,608 |
Q4 2025 | LPX Louisiana-Pacific Corporation | Louisiana-Pacific Corporation | Buy - Position Entry | +272,123 | - | $21.98M | 272,123 |
Q4 2025 | LYV Live Nation Entertainment, Inc. | Live Nation Entertainment, Inc. | Sell | -1,946 | -18.7% | $1.20M | 8,434 |
Q4 2025 | MAT Mattel, Inc. | Mattel, Inc. | Buy | +409,032 | +5.0% | $170.04M | 8,570,328 |
Q4 2025 | MGM MGM Resorts International | MGM Resorts International | Buy | +285,367 | +16.3% | $74.20M | 2,033,369 |
Q4 2025 | MLCO Melco Resorts & Entertainment L | Melco Resorts & Entertainment L | Sell | -213,165 | -10.6% | $13.61M | 1,797,254 |