Maple Rock Capital Partners Inc. In its 13F for Q1 2024 (holdings as of March 31, 2024, filed May 15, 2024), Maple Rock Capital Partners Inc. reported 29 stock positions worth $1.6 billion . Its top holding was Western Digital (WDC) at 12.6% of the portfolio, followed by Spirit Aerosystems Hold Class A (SPR, 10.1% ) and Vistra (VST, 7.6% ). Compared with Q4 2023, it opened 9 new positions, sold out of 7, added to 14 and reduced 3. The biggest buy was Vistra (VST, shares +100% ) and the biggest sale an exit from Kosmos Energy (KOS).
Location Toronto, A6
CIK 0001658363
Portfolio Value $1.6B (Q1 2024) Holdings 29 stocks · $1.6B Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q4 2023 WDC Western Digital Corp. 2,904,010 $198.2M Add +2.4% SPR Spirit Aerosystems Hold Class A 4,423,000 $159.5M Add +7.2% VST Vistra Corp. 1,720,000 $119.8M Add +100.5% JD Jd.com Inc.-ADR 3,326,438 $91.1M Add +21.4% ARCH Arch Resources Inc. 522,439 $84.0M Add +3.0% BABA Alibaba Group Holding-SP ADR 953,400 $69.0M Add +15.6% BLCO Bausch + Lomb Corp. 3,745,062 $64.8M No change TEVA Teva Pharmaceutical-SP ADR 4,363,401 $61.6M Add +68.3% LVS Las Vegas Sands Corp. 1,084,938 $56.1M Reduce -14.6% TGI Triumph Group Inc. 3,699,178 $55.6M No change LYFT LYFT Inc. Class A 2,725,500 $52.7M Reduce -9.2% ASTL Algoma Steel Group Inc. 6,092,091 $51.7M No change BIDU Baidu Inc. - Spon ADR 480,000 $50.5M Add +42.0% TFII Tfi International Inc. 277,499 $44.2M New IQ Iqiyi Inc.-ADR 10,320,000 $43.7M Add +65.4% RNG Ringcentral Inc. Class A 1,168,956 $40.6M Add +29.6% FMC FMC Corp. 591,618 $37.7M New MT Arcelormittal-NY Registered 1,320,000 $36.4M New LPX Louisiana-Pacific Corp. 373,500 $31.3M Add +41.2% EQX Equinox Gold Corp. 4,940,400 $29.7M New COMP Compass Inc. Class A 7,771,531 $28.0M Add +23.9% CEG Constellation Energy 150,000 $27.7M New GPN Global Payments Inc. 193,000 $25.8M Reduce -38.1% RUN Sunrun Inc. 1,855,000 $24.4M Add +60.6% BMA Banco Macro SA-ADR 498,000 $24.0M New HUYA Huya Inc.-ADR 5,145,125 $23.4M Add +125.2% VIST Vista Energy Sab DE CV 511,000 $21.1M New GDXJ Vaneck Junior Gold Miners 437,482 $16.9M New SFIX Stitch Fix Inc. Class A 3,406,934 $9.0M New
Options reported separately and not counted above: TSLA puts ($123.1M), WDC calls ($102.4M).
Portfolio Sells Q4 2023 → Q1 2024 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q4 2023 % Of Portfolio Change To Portfolio ▲ KOS Kosmos Energy Ltd. Sold out 0.00% −4.72 CCJ Cameco Corp. Sold out 0.00% −2.41 GRPN Groupon Inc. Sold out 0.00% −2.04 KVUE Kenvue Inc. Sold out 0.00% −2.00 WFG West Fraser Timber Co. Ltd. Sold out 0.00% −1.83 TRIP Tripadvisor Inc. Sold out 0.00% −1.67 GPN Global Payments Inc. Reduce -38.1% 1.63% −1.47 LVS Las Vegas Sands Corp. Reduce -14.6% 3.55% −1.35 PRTA Prothena Corp. PLC Sold out 0.00% −1.06 LYFT LYFT Inc. Class A Reduce -9.2% 3.34% −0.19
Portfolio Buys Q4 2023 → Q1 2024 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q4 2023 % Of Portfolio Change To Portfolio ▼ VST Vistra Corp. Add +100.5% 7.59% +5.00 TFII Tfi International Inc. New 2.80% +2.80 FMC FMC Corp. New 2.39% +2.39 MT Arcelormittal-NY Registered New 2.31% +2.31 EQX Equinox Gold Corp. New 1.88% +1.88 TEVA Teva Pharmaceutical-SP ADR Add +68.3% 3.90% +1.78 CEG Constellation Energy New 1.76% +1.76 BMA Banco Macro SA-ADR New 1.52% +1.52 VIST Vista Energy Sab DE CV New 1.34% +1.34 GDXJ Vaneck Junior Gold Miners New 1.07% +1.07 WDC Western Digital Corp. Add +2.4% 12.55% +0.91 HUYA Huya Inc.-ADR Add +125.2% 1.48% +0.83 SFIX Stitch Fix Inc. Class A New 0.57% +0.57 LPX Louisiana-Pacific Corp. Add +41.2% 1.99% +0.52 IQ Iqiyi Inc.-ADR Add +65.4% 2.77% +0.38 RNG Ringcentral Inc. Class A Add +29.6% 2.57% +0.17 BIDU Baidu Inc. - Spon ADR Add +42.0% 3.20% +0.05 COMP Compass Inc. Class A Add +23.9% 1.77% −0.08 SPR Spirit Aerosystems Hold Class A Add +7.2% 10.10% −0.17 RUN Sunrun Inc. Add +60.6% 1.55% −0.23 JD Jd.com Inc.-ADR Add +21.4% 5.77% −0.43 BABA Alibaba Group Holding-SP ADR Add +15.6% 4.37% −0.64 ARCH Arch Resources Inc. Add +3.0% 5.32% −1.28
Options Activity Q4 2023 → Q1 2024 Security Type Change vs Q4 2023 Underlying Shares Value ▼ LYFT LYFT Inc. Class A call Sold out 10,000,000 $149.9Mbefore exit TSLA Tesla Inc. put New 700,000 $123.1M WDC Western Digital Corp. call Reduce -25.0% 1,500,000 $102.4M RS Reliance Inc. put Sold out 300,000 $83.9Mbefore exit JD Jd.com Inc.-ADR call Sold out 2,000,000 $57.8Mbefore exit RNG Ringcentral Inc. Class A call Sold out 1,500,000 $50.9Mbefore exit TRIP Tripadvisor Inc. call Sold out 1,500,000 $32.3Mbefore exit
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 51 $5.1B WDC, STX, UNH, HUM, ICLR Q1 2026 44 $3.1B WDC, EQX, STX, CLF, TFII Q4 2025 38 $3.0B WDC, EQX, STX, AA, CLF Q3 2025 40 $2.5B WDC, EQX, STX, RUN, TFII Q2 2025 39 $2.0B WDC, STX, TFII, EQX, PDD Q1 2025 35 $1.4B WDC, TFII, BABA, TLN, PDD Q4 2024 29 $1.4B WDC, TEVA, TLN, LYFT, TFII Q3 2024 28 $1.8B WDC, VST, JD, TLN, BABA Q2 2024 27 $1.5B WDC, SPR, VST, JD, BABA Q1 2024 29 $1.6B WDC, SPR, VST, JD, ARCH