Maple Rock Capital Partners portfolio
Concentrated managerInvestment firmPortfolio as of Jun 30, 2026 (Q2 2026) · filed with the SEC on Aug 14, 2026 · data updated on Nov 5, 2026 · Q2 2026 13F (filing) ↗ · all its 13F filings ↗
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Maple Rock Capital Partners reported a $5.1 bn portfolio of 51 positions to the SEC as of the end of Q2 2026. Its largest positions are WDC, STX, UNH. During the quarter it opened Smurfit Westrock and RXO.
Sections with a free account
What it reported after the quarter end (Q2 2026)
The 13F shows the portfolio as of Jun 30, 2026. Since then Maple Rock Capital Partners has filed these own trades with the SEC (Form 4, when it owns more than 10% of a company or holds a role in it) and stakes above 5% (13D and 13G). It is not everything it did: only what it must report before the next 13F.
Stake reported in the company · event of Jun 30, 2026 · filed Aug 14, 2026 · filing ↗
What changed this quarter
47 positions with a change (10 new, 25 added to, 8 trimmed, 4 sold); also, 1 entered through an IPO. 12 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- Newly listedFedEx Freight HoldingFDXF1.3% of the portfolio
It started trading this quarter: it appears in a 13F for the first time. The filing does not say whether the manager already held it before the listing, so it is not counted as a purchase.
- Seagate Technology Holdings−44%fewer sharesReduced6.8% → 5.7%
- UnitedHealth Group+216%more sharesIncreased1.9% → 5.6%
- Cleveland-cliffs−85%fewer sharesReduced5.7% → 0.6%
- Icon+258%more sharesIncreased1.2% → 4.1%
- Smurfit Westrock+2.4 ppof portfolioNew— → 2.4%
- Humana+82%more sharesIncreased1.9% → 4.9%
- Nucor+424%more sharesIncreased0.6% → 2.7%
- Sandisk−99%fewer sharesReduced3.4% → 0.1%
- RXO+1.4 ppof portfolioNew— → 1.4%
- Advance Auto Parts+87%more sharesIncreased2.2% → 3.0%
- Mosaic+1.1 ppof portfolioNew— → 1.1%
- Elevance Health+209%more sharesIncreased0.6% → 1.5%
The figure on the right: for positions added to or trimmed, the change in the number of shares (%); for new and sold ones, the points of the portfolio moved (pp). Below, the portfolio weight before → after. Traded weight: what it bought or sold, excluding price effects.
Top holdings
- Western DigitalWDC17.0%
- Seagate Technology HoldingsSTX5.7%
- UnitedHealth GroupUNH5.6%
- HumanaHUM4.9%
- IconICLR4.1%
- TFI InternationalTFII4.0%
- Equinox GoldEQX3.3%
- Advance Auto PartsAAP3.0%
- Brookdale Senior LivingBKD2.8%
- NucorNUE2.7%
- British American Tobacco p.l.c.BTI2.6%
- ArcelorMittalMT2.6%
- CVS HealthCVS2.4%
- Smurfit WestrockSW2.4%
- Louisiana-pacificLPX2.3%
“Since”: first quarter of the current run, unbroken until today. In the details, prices are the quarter-end prices of the quarters in which it added shares, per the 13F. The manager may have bought at any price within each quarter; the SEC only publishes the value at quarter end.
Portfolio by sector
- ● Health Care 24%
- ● Information Technology 24%
- ● Materials 22%
- ● Industrials 15%
- ● Consumer Discretionary 9%
- ● Consumer Staples 4%
- ● Financials 2%
- ● Utilities 1%
How its portfolio changed (8 quarters)
Q2 2026: 51
Q2 2026: 53%
Q2 2026: 23.2%
Traded turnover: the weight it bought plus the weight it sold in the quarter, divided by two, excluding price moves. The plain “turnover” in the header does include that effect. With a free account: the full history and sectors over time.
Stakes above 5% (13D/13G)
Companies where this filer reported holding 5% or more of the shares. It is the figure from its latest filing on each one; history since December 2024.
How we classify it
Investment firm, per its Form ADV of Mar 31, 2026 (high confidence).
The data, as reported: MAPLE ROCK CAPITAL PARTNERS INC. (CRD 173887): 7.B private funds: 1 hedge (gross assets $6.3 bn); 5.D assets by client type: pooled vehicles 100% (of $6.3 bn)
The type comes from a rule applied to that data. If it looks wrong, tell us.
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