CIK: 0001658363
Total reported value
$3.1B
Reporting period: 2026-03-31 · Number of holdings: 44
Maple Rock Capital Partners Inc. disclosed 44 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $3.1B and a quarterly turnover rate of 54.8%.
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Maple Rock Capital Partners Inc.'s disclosed holdings carry a Herfindahl concentration index of 0.046 — mathematically equivalent to about 22 equally-sized positions, well below its 44 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 1.02), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 69% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Trim HCC
-91.3% -$131.0M
Trim AA
-72.3% -$113.5M
Trim RUN
-43.6% -$57.2M
Trim LVS
-52.0% -$54.2M
Add UNH
+291.6% $40.1M
Trim WDC
-41.2% -$31.5M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | WDC | Western Digital CORP | Stock-Tech | 12.32% | -1.23% | -41.20% | |
| 2 | EQX | Equinox Gold CORP | Stock-Other | 9.14% | -0.25% | -4.00% | |
| 3 | STX | Seagate Technology Holdings plc | Stock-Tech | 6.81% | +0.75% | -19.80% | |
| 4 | CLF | Cleveland-cliffs INC | Stock-Materials | 5.70% | +0.28% | +67.87% | |
| 5 | TFII | Tfi International INC | Stock-Other | 4.81% | +4.81% | NEW | |
| 6 | BKD | Brookdale Senior Living INC | Stock-Other | 3.63% | +0.60% | -4.00% | |
| 7 | SNDK | Sandisk CORP | Stock-Tech | 3.44% | -0.39% | -65.90% | |
| 8 | BTI | British American Tob-sp Adr | Stock-Consumer Staples | 3.02% | -0.08% | -4.00% | |
| 9 | JD | Jd.com Inc-adr | Stock-Consumer Disc | 2.91% | +1.09% | +57.60% | |
| 10 | LPX | Louisiana-pacific CORP | Stock-Industrials | 2.63% | +1.06% | +88.93% | |
| 11 | CVS | Cvs Health CORP | Stock-Healthcare | 2.45% | +0.31% | +28.38% | |
| 12 | MT | Arcelormittal-ny Registered | Stock-Other | 2.39% | — | -13.27% | |
| 13 | AAP | Advance Auto Parts INC | Stock-Consumer Disc | 2.23% | +0.47% | -4.00% | |
| 14 | ASTL | Algoma Steel Group INC | Stock-Other | 2.14% | +0.19% | +10.39% | |
| 15 | XPO | Xpo INC | Stock-Industrials | 2.03% | +2.03% | NEW | |
| 16 | LKQ | Lkq CORP | Stock-Consumer Disc | 1.97% | +0.93% | +97.27% | |
| 17 | AA | Alcoa CORP | Stock-Materials | 1.95% | -3.78% | -72.32% | |
| 18 | HUM | Humana INC | Stock-Healthcare | 1.95% | +0.49% | +99.65% | |
| 19 | UNH | Unitedhealth Group INC | Stock-Healthcare | 1.90% | +1.30% | +291.64% | |
| 20 | LYFT | Lyft Inc-a | Stock-Tech | 1.78% | -0.97% | -4.00% | |
| 21 | WAB | Wabtec CORP | Stock-Industrials | 1.75% | +1.75% | NEW | |
| 22 | ASO | Academy Sports & Outdoors In | Stock-Consumer Disc | 1.54% | +1.54% | NEW | |
| 23 | RKT | Rocket Cos Inc-class A | Stock-Financials | 1.45% | +0.29% | +72.20% | |
| 24 | NGVT | Ingevity CORP | Stock-Other | 1.40% | +0.08% | -10.58% | |
| 25 | RUN | Sunrun INC | Stock-Tech | 1.32% | -1.92% | -43.60% | |
| 26 | ARCB | Arcbest CORP | Stock-Other | 1.29% | +0.94% | +181.28% | |
| 27 | GT | Goodyear Tire & Rubber Co | Stock-Consumer Disc | 1.25% | +0.10% | +46.43% | |
| 28 | TPB | Turning Point Brands INC | Stock-Other | 1.23% | -0.20% | +9.19% | |
| 29 | ICLR | ICON Public Limited Company | Stock-Healthcare | 1.21% | +1.21% | NEW | |
| 30 | BTG | B2gold CORP | Stock-Other | 1.20% | +1.20% | NEW | |
| 31 | THO | Thor Industries INC | Stock-Consumer Disc | 1.20% | +0.62% | +170.47% | |
| 32 | WGO | Winnebago Industries | Stock-Other | 1.18% | +1.18% | NEW | |
| 33 | RYAM | Rayonier Advanced Materials | Stock-Other | 1.17% | +1.17% | NEW | |
| 34 | LVS | Las Vegas Sands CORP | Stock-Consumer Disc | 1.16% | -1.81% | -52.00% | |
| 35 | WHR | Whirlpool CORP | Stock-Consumer Disc | 1.04% | +0.08% | +46.83% | |
| 36 | MOH | Molina Healthcare INC | Stock-Healthcare | 0.74% | -0.56% | -24.98% | |
| 37 | CNC | Centene CORP | Stock-Healthcare | 0.70% | -0.67% | -35.07% | |
| 38 | KNX | Knight-swift Transportation | Stock-Industrials | 0.69% | +0.69% | NEW | |
| 39 | NUE | Nucor CORP | Stock-Materials | 0.64% | +0.64% | NEW | |
| 40 | FBIN | Fortune Brands Innovations I | Stock-Industrials | 0.62% | +0.62% | NEW | |
| 41 | ELV | Elevance Health INC | Stock-Healthcare | 0.59% | +0.59% | NEW | |
| 42 | WERN | Werner Enterprises INC | Stock-Other | 0.53% | -0.26% | -30.26% | |
| 43 | CAR | Avis Budget Group INC | Stock-Other | 0.44% | +0.44% | NEW | |
| 44 | HCC | Warrior Met Coal INC | Stock-Materials | 0.43% | -4.34% | -91.26% |
Performance for Q3 2026
+1.7%
Performance Last 4 Quarters
+73.3%
Based on 76% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 44 | $3.1B | 55 | |
| 2025-12-31 | 38 | $3.0B | 59 | |
| 2025-09-30 | 41 | $2.5B | 100 | |
| 2025-06-30 | 40 | $2.0B | 0 | |
| 2025-03-31 | 41 | $2.7B | 100 | |
| 2024-12-31 | 36 | $3.3B | 0 | |
| 2024-09-30 | 33 | $3.5B | 0 | |
| 2024-06-30 | 34 | $3.0B | 0 | |
| 2024-03-31 | 31 | $1.8B | 0 | |
| 2023-12-31 | 33 | $1.8B | 0 | |
| 2023-09-30 | 26 | $1.1B | 0 | |
| 2023-06-30 | 22 | $1.2B | 0 | |
| 2023-03-31 | 31 | $1.1B | 0 | |
| 2022-12-31 | 32 | $2.5B | 0 | |
| 2022-09-30 | 36 | $2.1B | 0 | |
| 2022-06-30 | 30 | $1.7B | 0 | |
| 2022-03-31 | 26 | $1.9B | 0 | |
| 2021-12-31 | 25 | $936.4M | 0 | |
| 2021-09-30 | 22 | $713.9M | 0 | |
| 2021-06-30 | 20 | $665.3M | 62 | |
| 2021-03-31 | 22 | $689.2M | 75 | |
| 2020-12-31 | 27 | $689.4M | 89 | |
| 2020-09-30 | 25 | $547.3M | 85 | |
| 2020-06-30 | 25 | $499.7M | 100 | |
| 2020-03-31 | 25 | $389.9M | 100 | |
| 2019-12-31 | 21 | $657.0M | 52 | |
| 2019-09-30 | 18 | $746.0M | 32 | |
| 2019-06-30 | 15 | $604.3M | 77 | |
| 2019-03-31 | 13 | $340.7M | 59 | |
| 2018-12-31 | 11 | $282.5M | 54 | |
| 2018-09-30 | 17 | $425.5M | 56 | |
| 2018-06-30 | 18 | $448.4M | 45 | |
| 2018-03-31 | 15 | $402.1M | 39 | |
| 2017-12-31 | 15 | $300.9M | 44 | |
| 2017-09-30 | 14 | $285.9M | 54 | |
| 2017-06-30 | 21 | $324.8M | 66 | |
| 2017-03-31 | 21 | $487.2M | 58 | |
| 2016-12-31 | 20 | $297.1M | 69 | |
| 2016-09-30 | 23 | $264.2M | 70 | |
| 2016-06-30 | 20 | $212.7M | 30 | |
| 2016-03-31 | 18 | $177.6M | 49 | |
| 2015-12-31 | 17 | $137.5M | 0 |
Maple Rock Capital Partners Inc.'s most significant position changes for 2026-03-31: New buy: Tfi International INC (TFII); Sold out: Sealed Air CORP (SDA); Sold out: Barrick Mining CORP (B); Sold out: Teck Resources Ltd-cls B (TECK); New buy: Xpo INC (XPO).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | UNH | Unitedhealth Group INC | +1.3% | +291.64% | Add |
| 2 | JD | Jd.com Inc-adr | +1.1% | +57.60% | Add |
| 3 | LPX | Louisiana-pacific CORP | +1.1% | +88.93% | Add |
| 4 | ARCB | Arcbest CORP | +0.9% | +181.28% | Add |
| 5 | LKQ | Lkq CORP | +0.9% | +97.27% | Add |
| 6 | STX | Seagate Technology Holdings plc | +0.8% | -19.80% | Trim |
| 7 | THO | Thor Industries INC | +0.6% | +170.47% | Add |
| 8 | BKD | Brookdale Senior Living INC | +0.6% | -4.00% | Trim |
| 9 | HUM | Humana INC | +0.5% | +99.65% | Add |
| 10 | AAP | Advance Auto Parts INC | +0.5% | -4.00% | Trim |
| 11 | CVS | Cvs Health CORP | +0.3% | +28.38% | Add |
| 12 | RKT | Rocket Cos Inc-class A | +0.3% | +72.20% | Add |
| 13 | CLF | Cleveland-cliffs INC | +0.3% | +67.87% | Add |
| 14 | ASTL | Algoma Steel Group INC | +0.2% | +10.39% | Add |
| 15 | GT | Goodyear Tire & Rubber Co | +0.1% | +46.43% | Add |
| 16 | NGVT | Ingevity CORP | +0.1% | -10.58% | Trim |
| 17 | WHR | Whirlpool CORP | +0.1% | +46.83% | Add |
| 18 | BTI | British American Tob-sp Adr | -0.1% | -4.00% | Trim |
| 19 | TPB | Turning Point Brands INC | -0.2% | +9.19% | Add |
| 20 | EQX | Equinox Gold CORP | -0.3% | -4.00% | Trim |
| 21 | WERN | Werner Enterprises INC | -0.3% | -30.26% | Trim |
| 22 | SNDK | Sandisk CORP | -0.4% | -65.90% | Trim |
| 23 | MOH | Molina Healthcare INC | -0.6% | -24.98% | Trim |
| 24 | CNC | Centene CORP | -0.7% | -35.07% | Trim |
| 25 | LYFT | Lyft Inc-a | -1% | -4.00% | Trim |
| 26 | WDC | Western Digital CORP | -1.2% | -41.20% | Trim |
| 27 | LVS | Las Vegas Sands CORP | -1.8% | -52.00% | Trim |
| 28 | RUN | Sunrun INC | -1.9% | -43.60% | Trim |
| 29 | AA | Alcoa CORP | -3.8% | -72.32% | Trim |
| 30 | HCC | Warrior Met Coal INC | -4.3% | -91.26% | Trim |
| 31 | TFII | Tfi International INC | — | NEW | New buy |
| 32 | SDA | Sealed Air CORP | — | EXIT | Sold out |
| 33 | B | Barrick Mining CORP | — | EXIT | Sold out |
| 34 | TECK | Teck Resources Ltd-cls B | — | EXIT | Sold out |
| 35 | XPO | Xpo INC | — | NEW | New buy |
| 36 | WAB | Wabtec CORP | — | NEW | New buy |
| 37 | ASO | Academy Sports & Outdoors In | — | NEW | New buy |
| 38 | ICLR | ICON Public Limited Company | — | NEW | New buy |
| 39 | BTG | B2gold CORP | — | NEW | New buy |
| 40 | WGO | Winnebago Industries | — | NEW | New buy |
| 41 | RYAM | Rayonier Advanced Materials | — | NEW | New buy |
| 42 | PDD | Pdd Holdings INC | — | EXIT | Sold out |
| 43 | PAGS | PagSeguro Digital Ltd. | — | EXIT | Sold out |
| 44 | KNX | Knight-swift Transportation | — | NEW | New buy |
| 45 | NUE | Nucor CORP | — | NEW | New buy |
| 46 | FBIN | Fortune Brands Innovations I | — | NEW | New buy |
| 47 | ELV | Elevance Health INC | — | NEW | New buy |
| 48 | JBS | Jbs N.v. | — | EXIT | Sold out |
| 49 | CAR | Avis Budget Group INC | — | NEW | New buy |
| 50 | UWMC | Uwm Holdings CORP | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-15 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-17 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-15 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-16 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-16 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-14 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-14 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-14 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-15 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-14 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-14 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-15 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-14 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-15 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-14 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-16 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-16 | 13F-HR | View on EDGAR |
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