Maple Rock Capital Partners Inc. reported 51 positions worth $5.10B for the quarter ended Jun 30, 2026, up 68.0% on the prior quarter. It opened 11 new positions, added to 25, trimmed 8 and exited 3. Its largest holding is Western Digital Corp at 17% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| UNH Unitedhealth Group Inc | +465.7K | +216.2% | $193.56M | 5.55% |
| ICLR Icon Plc | +864.3K | +257.8% | $150.14M | 4.09% |
| SW Smurfit Westrock plc | +2.61M | – | $120.66M | 2.37% |
| HUM Humana Inc | +283.5K | +82.2% | $112.59M | 4.89% |
| NUE Nucor Corp | +496.8K | +423.8% | $110.66M | 2.68% |
| RXO RXO, Inc. | +2.58M | – | $71.28M | 1.4% |
| AAP Advance Auto Parts Inc | +1.12M | +86.5% | $69.87M | 2.95% |
| FDXF FedEx Freight Holding Company, Inc. | +451.7K | – | $68.21M | 1.34% |
| MOS Mosaic Co | +2.68M | – | $56.79M | 1.11% |
| ELV Elevance Health, Inc. | +129.5K | +208.9% | $50.08M | 1.45% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| SNDK Sandisk Corp | -164.6K | -98.9% | $374.24M | 0.085% |
| STX Seagate Technology Holdings plc | -232.8K | -43.6% | $224.67M | 5.7% |
| CLF Cleveland-Cliffs Inc. | -17.66M | -85.1% | $165.85M | 0.568% |
| GT Goodyear Tire & Rubber Co | -5.82M | -100.0% | $38.57M | Exited |
| WHR Whirlpool Corp | -593.2K | -100.0% | $31.99M | Exited |
| LYFT Lyft, Inc. | -2.06M | -50.0% | $30.13M | 0.591% |
| WDC Western Digital Corp | -42.6K | -3.0% | $27.21M | 17.01% |
| EQX Equinox Gold Corp. | -1.89M | -9.7% | $18.41M | 3.34% |
| CAR Avis Budget Group, Inc. | -92.2K | -100.0% | $13.45M | Exited |
| ASO Academy Sports & Outdoors, Inc. | -253.6K | -30.2% | $11.95M | 0.542% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| SW Smurfit Westrock plc | +2.61M | $120.66M | 2.37% |
| RXO RXO, Inc. | +2.58M | $71.28M | 1.4% |
| FDXF FedEx Freight Holding Company, Inc. | +451.7K | $68.21M | 1.34% |
| MOS Mosaic Co | +2.68M | $56.79M | 1.11% |
| RMBS Rambus Inc | +342.6K | $45.48M | 0.892% |
| GPK Graphic Packaging Holding Co | +4.10M | $43.33M | 0.85% |
| TECK Teck Resources Ltd | +718.5K | $42.72M | 0.838% |
| GM General Motors Co | +499.5K | $38.50M | 0.755% |
| TLN Talen Energy Corp | +80.3K | $30.86M | 0.605% |
| AMZN Amazon Com Inc | +108.0K | $25.74M | 0.505% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | WDC Western Digital Corp | Technology | 1.36M | $867.28M | 17.01% | -42.6K | -3.0% | Reduced | 0.39% |
| 2 | STX Seagate Technology Holdings plc | Technology | 301.2K | $290.62M | 5.7% | -232.8K | -43.6% | Reduced | 0.13% |
| 3 | UNH Unitedhealth Group Inc | Healthcare | 681.1K | $283.09M | 5.55% | +465.7K | +216.2% | Added | 0.08% |
| 4 | HUM Humana Inc | Healthcare | 628.3K | $249.55M | 4.89% | +283.5K | +82.2% | Added | 0.52% |
| 5 | ICLR Icon Plc | Healthcare | 1.20M | $208.38M | 4.09% | +864.3K | +257.8% | Added | 1.53% |
| 6 | TFII TFI International Inc. | Industrials | 1.42M | $203.64M | 3.99% | +56.6K | +4.2% | Added | 1.71% |
| 7 | EQX Equinox Gold Corp. | Basic Materials | 17.53M | $170.44M | 3.34% | -1.89M | -9.7% | Reduced | 2.78% |
| 8 | AAP Advance Auto Parts Inc | Consumer Discretionary | 2.42M | $150.64M | 2.95% | +1.12M | +86.5% | Added | 4.03% |
| 9 | BKD Brookdale Senior Living Inc. | Healthcare | 8.89M | $143.01M | 2.8% | +731.0K | +9.0% | Added | 3.72% |
| 10 | NUE Nucor Corp | Basic Materials | 614.0K | $136.77M | 2.68% | +496.8K | +423.8% | Added | 0.27% |
| 11 | BTI British American Tobacco p.l.c. | Consumer Staples | 2.17M | $133.77M | 2.62% | +576.9K | +36.3% | Added | 0.1% |
| 12 | MT ArcelorMittal | Basic Materials | 2.19M | $131.93M | 2.59% | +776.6K | +54.9% | Added | 0.29% |
| 13 | CVS CVS HEALTH Corp | Healthcare | 1.20M | $123.93M | 2.43% | +149.9K | +14.3% | Added | 0.09% |
| 14 | SW Smurfit Westrock plc | Basic Materials | 2.61M | $120.66M | 2.37% | +2.61M | – | New | 0.5% |
| 15 | LPX Louisiana-Pacific Corp | Industrials | 1.52M | $119.71M | 2.35% | +409.3K | +36.8% | Added | 2.17% |
Tip. Select a row to see that position’s full history at Maple Rock Capital Partners.
As of its Q2 2026 13F filing, Maple Rock Capital Partners Inc.’s five largest positions were Western Digital Corp (WDC) at 17.0%, Seagate Technology Holdings plc (STX) at 5.7%, Unitedhealth Group Inc (UNH) at 5.6%, Humana Inc (HUM) at 4.9%, Icon Plc (ICLR) at 4.1% of the reported portfolio.
Maple Rock Capital Partners Inc. reported a 13F portfolio worth $5.10B across 51 positions for Q2 2026. That is up 68.0% from the previous quarter.
Its largest purchases by value were Unitedhealth Group Inc ($193.56M), Icon Plc ($150.14M), Smurfit Westrock plc ($120.66M). It opened 11 new positions.
Its largest sales by value were Sandisk Corp ($374.24M), Seagate Technology Holdings plc ($224.67M), Cleveland-Cliffs Inc. ($165.85M). It exited 3 positions entirely.
From the Form 13F-HR reports Maple Rock Capital Partners Inc. files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.