Maple Rock Capital Partners Inc.
CIK 1658363 · View on SEC EDGAR ↗
- Portfolio value
- $5.1B
- Positions
- 51
- As of
- June 30, 2026
#803 of 9,443 by 13F value · top 8.5%
Portfolio value QoQ: +65.9% 13F does not disclose cash
- Top 10 holdings weight
- 53.01%
- Top 25 holdings weight
- 80.21%
- Positions above 1%
- 32
- Effective number of positions
- 19.5
Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)
Turnover Q2 2026: 24.04% Est. buys $1,672,238,469 · sells $982,495,385
Median holding: 3.0 quarters Tracked Q4 2024–Q2 2026 · 56.7% still held
- New positions
- 11
- Increased
- 25
- Decreased
- 8
- Closed
- 4
On this page
- Performance vs S&P How this manager's 13F portfolio performed against the S&P 500.
- Sector breakdown How the portfolio splits across market sectors.
- Portfolio Every stock this institution reports holding, from its latest 13F.
- High-conviction bets The holdings this manager is most concentrated in.
- Biggest new bets Brand-new positions opened in the latest quarter.
- Top moves The biggest position increases and decreases this quarter.
- Exited positions Positions the manager fully sold out of last quarter.
- Related The person behind this filer, where we can match one.
Performance vs S&P 500
Annualized: +97.7% · S&P 500: +18.0%
Approximates a buy-and-hold portfolio built from quarterly SEC 13F snapshots. Excludes cash, short positions, options/derivatives, and non-13(f) securities — reflects the disclosed long-equity book only, not total fund AUM. SEC filing lag is up to 45 days; this is not a real-time-copyable timing.
Priceable coverage: 89.8% · Options excluded: 20.4%
Sector breakdown
Health Care
24.0%
Technology
23.7%
Industrials
13.8%
Materials
12.5%
Retail
5.3%
Consumer Discretionary
4.1%
Consumer Staples
3.8%
Packaging
3.4%
Paper & Forest
2.3%
Financial Services
1.7%
Utilities
0.6%
Other/Unmapped
4.7%
Full portfolio 51 positions
| Type | Streak | 8Q trend | |||||
|---|---|---|---|---|---|---|---|
| WDC Western Digital Corporation - Common Stock | $867,275,732 | 17.01% | 1,357,834 | $488,472,339 | Down ×4 | ||
| STX Seagate Technology Holdings PLC - Ordinary Shares (Ireland) | $290,621,330 | 5.70% | 301,162 | $81,427,366 | Down ×4 | ||
| UNH UnitedHealth Group Incorporated Common Stock (DE) | $283,085,593 | 5.55% | 681,100 | $224,800,507 | Up ×2 | ||
| HUM Humana Inc. Common Stock | $249,553,862 | 4.89% | 628,251 | $189,768,990 | Up ×2 | ||
| ICLR ICON plc - Ordinary Shares | $208,382,516 | 4.09% | 1,199,600 | $171,278,218 | Up ×1 | ||
| TFII TFI International Inc. Common Shares | $203,640,980 | 3.99% | 1,418,409 | $55,705,278 | Up ×1 | ||
| EQX | $170,435,907 | 3.34% | 17,531,248 | $-110,350,535 | Down ×2 | ||
| AAP Advance Auto Parts Inc. | $150,637,109 | 2.95% | 2,421,040 | $82,160,224 | Up ×1 | ||
| BKD Brookdale Senior Living Inc. Common Stock | $143,010,301 | 2.80% | 8,888,148 | $31,420,516 | Up ×1 | ||
| NUE Nucor Corporation Common Stock | $136,768,500 | 2.68% | 614,000 | $116,947,951 | Up ×1 | ||
| BTI British American Tobacco Industries, p.l.c. Common Stock ADR | $133,772,160 | 2.62% | 2,166,000 | $40,857,483 | Up ×1 | ||
| MT Arcelor Mittal NY Registry Shares NEW | $131,933,589 | 2.59% | 2,190,860 | $58,420,094 | Up ×1 | ||
| CVS CVS Health Corporation Common Stock | $123,932,686 | 2.43% | 1,197,996 | $48,658,144 | Up ×2 | ||
| SW Smurfit WestRock plc Ordinary Shares | $120,659,865 | 2.37% | 2,608,298 | Up ×1 | |||
| LPX Louisiana-Pacific Corporation Common Stock | $119,709,429 | 2.35% | 1,521,859 | $38,770,762 | Up ×4 | ||
| CNC Centene Corporation Common Stock | $88,702,813 | 1.74% | 1,381,879 | $67,206,417 | Up ×1 | ||
| RKT Rocket Companies, Inc. Class A Common Stock | $87,311,700 | 1.71% | 5,543,600 | $42,663,600 | Up ×2 | ||
| AA Alcoa Corporation Common Stock | $82,262,321 | 1.61% | 1,577,720 | $22,345,105 | Up ×1 | ||
| ARCB ArcBest Corporation - Common Stock | $76,900,981 | 1.51% | 535,746 | $37,129,508 | Up ×2 | ||
| ELV Elevance Health, Inc. Common Stock | $74,058,795 | 1.45% | 191,500 | $55,908,295 | Up ×1 | ||
| XPO XPO, Inc. Common Stock | $72,406,194 | 1.42% | 352,702 | $10,103,113 | Up ×1 | ||
| RXO RXO, Inc. Common Stock | $71,283,041 | 1.40% | 2,583,655 | Up ×1 | |||
| ASTL Algoma Steel Group Inc. - Common Shares | $68,290,363 | 1.34% | 16,861,818 | $2,496,085 | Up ×6 | ||
| Unknown issuer (CUSIP: 314352105) | $68,206,700 | 1.34% | 451,700 | Up ×1 | |||
| JD JD.com, Inc. - American Depositary Shares | $68,045,410 | 1.33% | 2,670,542 | $-21,441,157 | Down ×1 | ||
| WERN Werner Enterprises, Inc. - Common Stock | $59,578,543 | 1.17% | 1,366,167 | $43,304,020 | Up ×1 | ||
| TPB Turning Point Brands, Inc. Common Stock | $58,247,508 | 1.14% | 686,800 | $20,407,068 | Up ×3 | ||
| WAB Westinghouse Air Brake Technologies Corporation Common Stock | $58,071,840 | 1.14% | 215,400 | $4,241,226 | |||
| MOS Mosaic Company (The) Common Stock | $56,789,200 | 1.11% | 2,680,000 | Up ×1 | |||
| MOH Molina Healthcare Inc Common Stock | $55,642,710 | 1.09% | 243,300 | $33,021,700 | Up ×1 | ||
| FBIN Fortune Brands Innovations, Inc. Common Stock | $54,695,882 | 1.07% | 996,282 | $35,764,957 | Up ×1 | ||
| LKQ LKQ Corporation - Common Stock | $54,386,326 | 1.07% | 2,065,565 | $-6,279,318 | |||
| RUN Sunrun Inc. - Common Stock | $49,433,052 | 0.97% | 3,694,548 | $8,724,576 | Up ×1 | ||
| WGO Winnebago Industries, Inc. Common Stock | $48,710,376 | 0.96% | 1,559,231 | $12,457,313 | Up ×1 | ||
| RMBS Rambus, Inc. - Common Stock | $45,476,724 | 0.89% | 342,600 | Up ×1 | |||
| NGVT Ingevity Corporation Common Stock | $45,048,635 | 0.88% | 603,303 | $2,075,362 | |||
| GPK Graphic Packaging Holding Company | $43,334,886 | 0.85% | 4,099,800 | Up ×1 | |||
| TECK Teck Resources Ltd Ordinary Shares | $42,722,010 | 0.84% | 718,500 | ||||
| GM General Motors Company Common Stock | $38,501,229 | 0.75% | 499,497 | Up ×1 | |||
| THO Thor Industries, Inc. Common Stock | $34,713,698 | 0.68% | 461,864 | $-2,184,617 | |||
| TLN Talen Energy Corporation - Common Stock | $30,856,078 | 0.61% | 80,300 | ||||
| LVS Las Vegas Sands Corp. Common Stock | $30,615,841 | 0.60% | 662,824 | $-5,097,116 | |||
| LYFT Lyft, Inc. - Class A Common Stock | $30,130,948 | 0.59% | 2,062,351 | $-24,727,602 | Down ×2 | ||
| CLF Cleveland-Cliffs Inc. Common Stock | $28,950,844 | 0.57% | 3,083,157 | $-146,349,113 | Down ×1 | ||
| KNX Knight-Swift Transportation Holdings Inc. | $28,507,818 | 0.56% | 366,095 | $7,428,068 | |||
| ASO Academy Sports and Outdoors, Inc. - Common Stock | $27,637,032 | 0.54% | 586,400 | $-19,780,968 | Down ×1 | ||
| AMZN Amazon.com, Inc. - Common Stock | $25,740,720 | 0.50% | 108,000 | Up ×1 | |||
| RYAM Rayonier Advanced Materials Inc. Common Stock | $25,599,148 | 0.50% | 3,256,889 | $-10,454,613 | |||
| HCC Warrior Met Coal, Inc. Common Stock | $20,578,848 | 0.40% | 253,559 | $7,252,902 | Up ×1 | ||
| IP International Paper Company Common Stock | $10,835,640 | 0.21% | 284,400 | Up ×1 | |||
| SNDK Sandisk Corporation - Common Stock | $4,333,729 | 0.08% | 1,906 | $-101,450,381 | Down ×3 | ||
| No matches | |||||||
Conviction holdings
Positions increased for 3+ consecutive quarters.
Share counts are as reported in 13F filings (not split-adjusted)
Biggest new bets
New positions opened this quarter, largest first.
| Security | Value | Shares | % of portfolio |
|---|---|---|---|
| SW | $120,659,865 | 2,608,298 | 2.37% |
| RXO | $71,283,041 | 2,583,655 | 1.40% |
| Unknown issuer (CUSIP: 314352105) | $68,206,700 | 451,700 | 1.34% |
| MOS | $56,789,200 | 2,680,000 | 1.11% |
| RMBS | $45,476,724 | 342,600 | 0.89% |
| GPK | $43,334,886 | 4,099,800 | 0.85% |
| TECK | $42,722,010 | 718,500 | 0.84% |
| GM | $38,501,229 | 499,497 | 0.75% |
| TLN | $30,856,078 | 80,300 | 0.61% |
| AMZN | $25,740,720 | 108,000 | 0.50% |
| IP | $10,835,640 | 284,400 | 0.21% |
Top movers (QoQ)
| Security | Action | Shares Δ | Value Δ |
|---|---|---|---|
| WDC | Trimmed | -43K | +$488.5M |
| UNH | Bought more | +466K | +$224.8M |
| HUM | Bought more | +283K | +$189.8M |
| EQX | Trimmed | -1.9M | -$110.4M |
| AAP | Bought more | +1.1M | +$82.2M |
| STX | Trimmed | -233K | +$81.4M |
| CNC | Bought more | +725K | +$67.2M |
| MT | Bought more | +777K | +$58.4M |
| ELV | Bought more | +130K | +$55.9M |
| TFII | Bought more | +57K | +$55.7M |
4 positions hidden (data completeness check)
Exited positions
Includes corporate events (mergers, delistings) — not all exits are sells
Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.
| Security | Quarter | Shares before | Value before | Price since exit |
|---|---|---|---|---|
| QQQ | June 30, 2025 | 1,000,000 | $468,920,000 | |
| SPY | June 30, 2025 | 700,000 | $391,573,000 | No longer tracked |
| GLD | March 31, 2025 | 1,500,000 | $363,195,000 | No longer tracked |
| NVDA | June 30, 2025 | 2,000,000 | $216,760,000 | 37.3% |
| TSLA | June 30, 2025 | 500,000 | $129,580,000 | 9.8% |
| LNG | June 30, 2025 | 500,000 | $115,700,000 | 14.8% |
| INTC | Dec. 31, 2025 | 3,046,800 | $102,220,140 | 149.1% |
| TFII | Dec. 31, 2025 | 1,098,362 | $96,721,758 | 36.2% |
| VST | March 31, 2025 | 675,414 | $93,119,328 | 18.5% |
| TEVA | March 31, 2025 | 4,208,741 | $92,760,652 | 141.8% |
| SEE | March 31, 2026 | 2,105,556 | $87,233,185 | No longer tracked |
| B | March 31, 2026 | 1,991,400 | $86,725,470 | 15.7% |
| ALB | March 31, 2025 | 1,000,000 | $86,080,000 | 97.4% |
| BABA | Dec. 31, 2025 | 406,930 | $72,730,599 | -16.7% |
| CAR | Sept. 30, 2025 | 415,584 | $70,254,475 | -9.3% |
| TECK | March 31, 2026 | 1,393,516 | $66,735,481 | 33.2% |
| TGI | March 31, 2025 | 3,323,178 | $62,010,501 | No longer tracked |
| BIDU | June 30, 2025 | 625,100 | $57,527,953 | 8.8% |
| KD | Sept. 30, 2025 | 1,000,832 | $41,994,911 | -58.7% |
| TLN | Dec. 31, 2025 | 98,175 | $41,761,682 | -15.8% |
| TMF | June 30, 2025 | 945,000 | $41,580,000 | No longer tracked |
| GT | June 30, 2026 | 5,817,063 | $38,567,128 | -9.3% |
| W | Sept. 30, 2025 | 743,491 | $38,022,130 | 13.4% |
| BTG | June 30, 2026 | 8,158,600 | $36,958,458 | No longer tracked |
| WERN | March 31, 2025 | 981,540 | $35,256,917 | 31.4% |
| PDD | March 31, 2026 | 306,641 | $34,770,023 | -13.2% |
| KMX | June 30, 2025 | 433,528 | $33,780,502 | -8.4% |
| PAGS | March 31, 2026 | 3,365,400 | $32,442,456 | -14.8% |
| WHR | June 30, 2026 | 593,200 | $31,985,344 | 4.9% |
| NUE | Dec. 31, 2025 | 226,200 | $30,634,266 | 52.9% |
| BMBL | Sept. 30, 2025 | 4,571,614 | $30,126,936 | -54.5% |
| BLCO | June 30, 2025 | 1,971,053 | $28,580,269 | 32.4% |
| BMA | March 31, 2025 | 261,400 | $25,293,064 | -0.7% |
| UMC | Sept. 30, 2025 | 3,140,443 | $24,024,389 | 144.6% |
| TDOC | Sept. 30, 2025 | 2,688,278 | $23,414,901 | -16.9% |
| WGO | Dec. 31, 2025 | 680,199 | $22,745,855 | -19.7% |
| SNAP | March 31, 2025 | 2,000,000 | $21,540,000 | -39.5% |
| ILMN | Sept. 30, 2025 | 220,855 | $21,071,776 | 121.1% |
| JBS | March 31, 2026 | 985,106 | $14,205,229 | -24.9% |
| BHC | Dec. 31, 2025 | 2,133,887 | $13,763,571 | -2.4% |
| CAR | June 30, 2026 | 92,248 | $13,454,371 | -1.5% |
| UWMC | March 31, 2026 | 2,204,100 | $9,653,958 | -60.5% |
| MHK | Sept. 30, 2025 | 84,975 | $8,908,779 | 5.0% |