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Funds (13F)

Maple Rock Capital Partners Inc.

Backtest from 19 Feb 2016 to 2 Nov 2026 · weekly · hypothetical

Watch this strategy
Return a year
+34.3%
S&P 500 +15.5%
Last 12 months
+43.9%
S&P 500 +12.1%
Sharpe ratio
1.05
S&P 500 0.80
Biggest drop
−42.8%
S&P 500 −31.8%
$10.0k$20.0k$40.0k$80.0k$160k 201620182020202220242026 $235k$46.9k
StrategyS&P 500 $10,000 in Maple Rock Capital Partners Inc. from 19 Feb 2016 against the S&P 500 (total return) over the same dates, marked weekly, log scale. Hypothetical: before taxes and trading costs.

About

Copies Maple Rock Capital Partners Inc.'s quarterly 13F holdings in the companies we cover, weighted by reported value: it buys on the first trading day after each 13F is filed (up to 45 days after the quarter) and holds until the next filing. A 13F shows long US-listed positions only, at the quarter's end, so this misses shorts, cash, bonds, non-US holdings and trading within the quarter.

Maple Rock Capital Partners Inc.'s 13F holdings →

Key statistics

MeasureStrategyS&P 500
Return a year (compound)+34.3%+15.5%
Total return+2247%+369%
Last 12 months+43.9%+12.1%
Last 3 months−6.5%—
Last month−0.2%—
This year so far+32.1%—
Volatility a year30.1%16.7%
Sharpe ratio1.050.80
Biggest drop−42.8%−31.8%
Beta to the S&P 5001.331.00
Alpha a year (t-statistic)+13.8% (2.20)—
Share of weeks up57%—

Sharpe ratio uses returns above the 3-month Treasury bill rate. Alpha is the yearly return left after allowing for the strategy's exposure to the S&P 500 (CAPM); a t-statistic below about 2 means it cannot be told apart from luck.

Insights

CompanyWeightHeld sinceReturn since
WDC17.1%——
STX5.8%——
UNH5.6%——
HUM4.9%——
ICLR4.1%——
TFII4.0%——
EQX3.4%——
AAP3.0%——
BKD2.8%——
NUE2.7%——
BTI2.6%——
MT2.6%——
CVS2.5%——
SW2.4%——
LPX2.4%——
CNC1.8%——
RKT1.7%——
AA1.6%——
ARCB1.5%——
ELV1.5%——
XPO1.4%——
RXO1.4%——
ASTL1.4%——
FDXF1.4%——
JD1.4%——
WERN1.2%——
TPB1.1%——
WAB1.1%——
MOS1.1%——
MOH1.1%——
FBIN1.1%——
LKQ1.1%——
RUN1.0%——
WGO1.0%——
RMBS0.9%——
NGVT0.9%——
GPK0.9%——
GM0.8%——
THO0.7%——
TLN0.6%——
LVS0.6%——
LYFT0.6%——
CLF0.6%——
KNX0.6%——
ASO0.6%——
AMZN0.5%——
RYAM0.5%——
HCC0.4%——
IP0.2%——
SNDK0.1%——

Weighted by reported value in the latest 13F, held until the next filing.

PeriodReturn a yearS&P 500SharpeS&P 500Biggest dropBetaAlpha (t)
Whole backtest19 Feb 2016 to 2 Nov 2026+34.3%+15.5%1.050.80−42.8%1.33+13.8% (2.20)
2018 onwards5 Jan 2018 to 2 Nov 2026+26.4%+13.9%0.810.66−42.8%1.32+9.8% (1.43)
Last three years3 Nov 2023 to 2 Nov 2026+41.2%+21.8%1.261.16−25.6%1.34+11.8% (1.06)
Last year7 Nov 2025 to 2 Nov 2026+41.0%+14.2%1.240.84−18.0%1.52+18.6% (0.90)
DateCompanyAction
21 Aug 2026TLNBought
21 Aug 2026SWBought
21 Aug 2026RXOBought
21 Aug 2026RMBSBought
21 Aug 2026MOSBought
21 Aug 2026IPBought
21 Aug 2026GPKBought
21 Aug 2026GMBought
21 Aug 2026FDXFBought
21 Aug 2026AMZNBought
22 May 2026XPOBought
22 May 2026WGOBought
22 May 2026WABBought
22 May 2026TFIIBought
22 May 2026RYAMBought
22 May 2026NUEBought
22 May 2026KNXBought
22 May 2026ICLRBought
22 May 2026FBINBought
22 May 2026ELVBought
22 May 2026CARBought
22 May 2026BTGBought
22 May 2026ASOBought
20 Feb 2026WERNBought
20 Feb 2026CVSBought

Dated at the rebalance that made the change.

DateCompanyAction
21 Aug 2026WHRSold
21 Aug 2026GTSold
21 Aug 2026CARSold
21 Aug 2026BTGSold
22 May 2026UWMCSold
22 May 2026PDDSold
22 May 2026PAGSSold
22 May 2026JBSSold
22 May 2026BSold
20 Feb 2026WGOSold
20 Feb 2026TLNSold
20 Feb 2026TFIISold
20 Feb 2026NUESold
20 Feb 2026INTCSold
20 Feb 2026BHCSold
20 Feb 2026BABASold
21 Nov 2025WSold
21 Nov 2025UMCSold
21 Nov 2025TDOCSold
21 Nov 2025MHKSold
21 Nov 2025KDSold
21 Nov 2025ILMNSold
21 Nov 2025CARSold
21 Nov 2025BMBLSold
15 Aug 2025KMXSold

Dated at the rebalance that made the change.

Backtests are hypothetical and use today's listed companies only, which flatters results. Past performance does not predict future returns. This is research, not investment advice. How we backtest