Maple Rock Capital Partners Inc.
Sector Allocation
- Healthcare24.9%$1.3B
- Technology24.6%$1.3B
- Industrials18.2%$926.6M
- Materials18.0%$918.6M
- Consumer Discretionary7.8%$395.6M
- Consumer Staples3.8%$192.0M
- Financials1.7%$87.3M
- Utilities0.6%$30.9M
- Energy0.4%$20.6M
AUM History
13fpro.ai/research/fund/maple-rock-capital-partners-inc-1658363
Conviction and streaks
Diversifying · top 10 = 53.0%From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.
Largest positions — Q2 2026
WDC
$867.3MSTX
$290.6MUNH
$283.1MHUM
$249.6MICLR
$208.4MTFII
$203.6MEQX
$170.4MAAP
$150.6MBKD
$143.0MNUE
$136.8MBTI
$133.8MMT
$131.9MCVS
$123.9MSW
$120.7MLPX
$119.7MCNC
$88.7MRKT
$87.3MAA
$82.3MARCB
$76.9MELV
$74.1M
Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.
13fpro.ai/research/fund/maple-rock-capital-partners-inc-1658363
Maple Rock Capital Partners Inc. 13F holdings — Q2 2026
$5.1B portfolio (+65.9% QoQ) · 51 holdings · Q2 2026 13F · top 10 are 53% of the stock portfolio
$867.3M
17.0% of stocks
-3%This quarter-30.0%Since filed10+ qtrsHeld$290.6M
5.7% of stocks
-44%This quarter-33.8%Since filed9 qtrsHeld$283.1M
5.5% of stocks
+216%This quarter+2.2%Since filed4 qtrsHeld$249.6M
4.9% of stocks
+82%This quarter+7.2%Since filed6 qtrsHeld$208.4M
4.1% of stocks
+258%This quarter+12.6%Since filed2 qtrsHeld$203.6M
4.0% of stocks
+4%This quarter-23.8%Since filed2 qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialAdded 2 qtrs in a row$170.4M
3.3% of stocks
-10%This quarter-13.4%Since filed10+ qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialTrimmed 2 qtrs in a row$150.6M
3.0% of stocks
+87%This quarter-17.6%Since filed8 qtrsHeld$143.0M
2.8% of stocks
+9%This quarter-22.8%Since filed5 qtrsHeld$136.8M
2.7% of stocks
+424%This quarter-4.3%Since filed2 qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialAdded 2 qtrs in a row
All holdings — Maple Rock Capital Partners Inc. (Q2 2026)
51 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.
| # | Company | Held | Source | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 11 | British American Tobacco p.l.c.adr | Consumer Staples | $133.8M | 2.6% | 2.17M | +36% | 5 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 12 | ArcelorMittal | Materials | $131.9M | 2.6% | 2.19M | +55% | 4 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 13 | CVS HEALTH Corp | Healthcare | $123.9M | 2.4% | 1.20M | +14% | 3 qtrsAdded 3 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 14 | Smurfit Westrock plc | Materials | $120.7M | 2.4% | 2.61M | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 15 | LOUISIANA-PACIFIC CORP | Industrials | $119.7M | 2.4% | 1.52M | +37% | 6 qtrsAdded 4 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 16 | CENTENE CORP | Healthcare | $88.7M | 1.7% | 1.38M | +110% | 4 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 17 | Rocket Companies, Inc. | Financials | $87.3M | 1.7% | 5.54M | +77% | 5 qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 18 | Alcoa Corp | Materials | $82.3M | 1.6% | 1.58M | +75% | 3 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 19 | ARCBEST CORP /TX/ | Industrials | $76.9M | 1.5% | 536K | +32% | 3 qtrsAdded 3 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 20 | Elevance Health, Inc. | Healthcare | $74.1M | 1.4% | 192K | +209% | 2 qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 21 | XPO, Inc. | Industrials | $72.4M | 1.4% | 353K | +10% | 2 qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 22 | RXO, Inc. | Industrials | $71.3M | 1.4% | 2.58M | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 23 | Algoma Steel Group Inc. | Materials | $68.3M | 1.3% | 16.86M | +6% | 10+ qtrsAdded 6 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 24 | FedEx Freight Holding Company, Inc. | Industrials | $68.2M | 1.3% | 452K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 25 | JD.com, Inc.adr | Consumer Discretionary | $68.0M | 1.3% | 2.67M | -12% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 26 | $WERN | WERNER ENTERPRISES INC | Industrials | $59.6M | 1.2% | 1.37M | +147% | |||
| 27 | $TPB | Turning Point Brands, Inc. | Consumer Staples | $58.2M | 1.1% | 687K | +58% | |||
| 28 | $WAB | WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP | Industrials | $58.1M | 1.1% | 215K | — | |||
| 29 | $MOS | MOSAIC CO | Materials | $56.8M | 1.1% | 2.68M | New | |||
| 30 | $MOH | MOLINA HEALTHCARE, INC. | Healthcare | $55.6M | 1.1% | 243K | +43% | |||
| 31 | $FBIN | Fortune Brands Innovations, Inc. | Industrials | $54.7M | 1.1% | 996K | +105% | |||
| 32 | $LKQ | LKQ CORP | Consumer Discretionary | $54.4M | 1.1% | 2.07M | — | |||
| 33 | $RUN | Sunrun Inc. | Technology | $49.4M | 1.0% | 3.69M | +23% | |||
| 34 | $WGO | WINNEBAGO INDUSTRIES INC | Industrials | $48.7M | 1.0% | 1.56M | +33% | |||
| 35 | $RMBS | RAMBUS INC | Technology | $45.5M | 0.9% | 343K | New | |||
| 36 | $NGVT | Ingevity Corp | Healthcare | $45.0M | 0.9% | 603K | — | |||
| 37 | $GPK | GRAPHIC PACKAGING HOLDING CO | Materials | $43.3M | 0.8% | 4.10M | New | |||
| 38 | $TECK | TECK RESOURCES LTD | Materials | $42.7M | 0.8% | 719K | New | |||
| 39 | $GM | General Motors Co | Consumer Discretionary | $38.5M | 0.8% | 499K | New | |||
| 40 | $THO | THOR INDUSTRIES INC | Industrials | $34.7M | 0.7% | 462K | — | |||
| 41 | $TLN | Talen Energy Corp | Utilities | $30.9M | 0.6% | 80K | New | |||
| 42 | $LVS | LAS VEGAS SANDS CORP | Consumer Discretionary | $30.6M | 0.6% | 663K | — | |||
| 43 | $LYFT | Lyft, Inc. | Industrials | $30.1M | 0.6% | 2.06M | -50% | |||
| 44 | $CLF | CLEVELAND-CLIFFS INC. | Materials | $29.0M | 0.6% | 3.08M | -85% | |||
| 45 | $KNX | Knight-Swift Transportation Holdings Inc. | Industrials | $28.5M | 0.6% | 366K | — | |||
| 46 | $ASO | Academy Sports & Outdoors, Inc. | Consumer Discretionary | $27.6M | 0.5% | 586K | -30% | |||
| 47 | $AMZN | AMAZON COM INC | Consumer Discretionary | $25.7M | 0.5% | 108K | New | |||
| 48 | $RYAM | RAYONIER ADVANCED MATERIALS INC. | Materials | $25.6M | 0.5% | 3.26M | — | |||
| 49 | $HCC | WARRIOR MET COAL, INC. | Energy | $20.6M | 0.4% | 254K | +77% | |||
| 50 | $IP | INTERNATIONAL PAPER CO /NEW/ | Materials | $10.8M | 0.2% | 284K | New | |||
| 51 | $SNDK | Sandisk Corp | Technology | $4.3M | 0.1% | 1,906 | -99% |
What changed in Q2 2026
Against the previous quarter's 13F: 11 new, 25 added to, 8 trimmed, 4 sold out. Share-count changes; largest moves by dollar size first.
New positions (11)
first bought this quarter
$RXORXO, Inc.$71.3M
first bought this quarter
$FDXFFedEx Freight Holding Company, Inc.$68.2M
first bought this quarter
$MOSMOSAIC CO$56.8M
first bought this quarter
$RMBSRAMBUS INC$45.5M
first bought this quarter
$GPKGRAPHIC PACKAGING HOLDING CO$43.3M
first bought this quarter
+5 more in the Excel export
Added to (25)
now $283.1M · held 4 qtrs, 2 adds in a row
now $208.4M · held 2 qtrs, 2 adds in a row
now $249.6M · held 6 qtrs, 2 adds in a row
now $136.8M · held 2 qtrs, 2 adds in a row
now $150.6M · held 8 qtrs
now $74.1M · held 2 qtrs, 2 adds in a row
+19 more in the Excel export
Trimmed (8)
$SNDKSandisk Corp-99%
now $4.3M · held 6 qtrs, 3 trims in a row
now $290.6M · held 9 qtrs, 4 trims in a row
$CLFCLEVELAND-CLIFFS INC.-85%
now $29.0M · held 5 qtrs
$LYFTLyft, Inc.-50%
now $30.1M · held 10+ qtrs, 2 trims in a row
now $867.3M · held 10+ qtrs, 4 trims in a row
now $170.4M · held 10+ qtrs, 2 trims in a row
+2 more in the Excel export
Holdings by quarter
Every 13F Maple Rock Capital Partners Inc. has filed, 41 earlier quarters. Pick one to see what it held then.
Is it too late to follow Maple Rock Capital Partners?
Q2 2026 13F filed with the SEC on Aug 14, 2026. Prices are closing prices as of Oct 26, 2026.
Average quality of Maple Rock Capital Partners's top 20 holdings: 66/100 (our AI quality score, weighted by position size; 13 of the 20 are scored)
Top 10 since filing
-16.4%
Value-weighted move of the 10 largest stock positions
Turnover
24%
Last quarter; 101% over the last 4
Top 10 weight
53%
Share of the stock portfolio in its 10 largest positions
Held 4+ quarters
64%
Share of portfolio value in positions held a year or more
Highest-quality names it owns(among its 100 largest positions)
The 8 highest-scoring companies in this portfolio are a Pro feature.
How these are measured
- Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
- Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
- Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q1 2024 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
- Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
- Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.
Portfolio Overview
Maple Rock Capital Partners Inc. disclosed 51 positions worth $5.1B in its Form 13F-HR for Q2 2026, led by $WDC (WESTERN DIGITAL CORP) at 17.0% of the equity portfolio, followed by $STX and $UNH. During the quarter the fund opened 11 new positions and exited 4 — including a new stake in $SW and a full exit from $GT. The portfolio is most concentrated in Healthcare (24.9% of disclosed assets). All figures are sourced directly from Maple Rock Capital Partners Inc.’s Form 13F-HR filing with the SEC under CIK 1658363.
Funds like this
managers whose biggest positions overlap Maple Rock Capital Partners'sBrowse Top Institutional Investors
13F Pro tracks 8,700+ institutional investors filing 13F reports with the SEC.
to search all 8,700+ institutional filers.
AI-Powered Hedge Fund Analysis: Maple Rock Capital Partners Inc.
13F Pro is an AI hedge fund tracker and stock research platform. For Maple Rock Capital Partners Inc. (SEC CIK: 1658363), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.
Every holding in Maple Rock Capital Partners Inc.'s portfolio is scored on an AI quality ranking built from its SEC filings (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.