Maple Rock Capital Partners Inc.

$3.1B reported 13(f) long value · latest quarter 2026-03-31 · CIK 1658363 · EDGAR ↗
sum of disclosed values for 2026-03-31; 0 positions carry a NULL value and are excluded from the sum, surfaced here rather than folded away
$3.1B
ALL retained default holdings for this (filer, period), including NULL-value ones
44
positions with no comparable holding in the prior quarter (kind new), 2026-03-31
13
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record
7
A quarter-end snapshot. Filed up to 45 days later, so this page is not current holdings and never a complete portfolio. what a 13F is — and is not ↓ methodology §13F ↗
FILING WINDOW OPEN
Quarter 2026-09-30: the 13F window is open until 2026-11-16. Rankings and QoQ moves that touch this quarter are provisional by construction — filers who have not yet reported are not zeros.

Position changes — into 2026-03-31

by shares · Δ value · filing link · how changes are classified §
Period
Position changes into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match identity_reconciled_by_cusipthe reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE classified_by_value · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stakederived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zeroreported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated shares_unit_mismatchPrev valueCurr valuePrev sharesCurr shares
position key pos:15598 · issuer key iss:1962 COMTRIM−$31.5M−981,091$410M$379M2,381,5251,400,434
position key pos:10929 · issuer key iss:676 COMTRIM−$3.4M−809,400$284M$281M20,234,04819,424,648
position key pos:15578 · issuer key iss:2205 ORD SHSTRIM+$25.8M−131,867$183M$209M665,852533,985
position key pos:10241 · issuer key iss:467 COMADD+$11.2M+8,387,327$164M$175M12,358,23020,745,557
position key pos:11894 · issuer key iss:1744 COMNEW+$148M+1,361,831$0$148M—1,361,831
position key pos:10784 · issuer key iss:324 COMTRIM+$19.9M−339,900$91.7M$112M8,497,0488,157,148
position key pos:12331 · issuer key iss:1618 COMTRIM−$10.1M−321,800$116M$106M488,300166,500
position key pos:13452 · issuer key iss:320 SPONSORED ADRTRIM−$808K−66,200$93.7M$92.9M1,655,3001,589,100
position key pos:11844 · issuer key iss:1030 SPON ADS CL AADD+$34.4M+1,106,100$55.1M$89.5M1,920,1623,026,262
position key pos:15163 · issuer key iss:1140 COMADD+$33.4M+523,691$47.6M$80.9M588,8681,112,559
position key pos:13354 · issuer key iss:367 COMADD+$10.5M+231,700$64.8M$75.3M816,4001,048,100
position key sid:sec:prov:dfc258937165c462fd1ad3d4e37e4beb · issuer key cusip6:03938L NY REGISTRY SHTRIM−$793K−216,335$74.3M$73.5M1,630,6001,414,265
position key pos:14373 · issuer key iss:41 COMTRIM+$15.3M−54,100$53.1M$68.5M1,352,2401,298,140
position key pos:17865 · issuer key cusip6:015658 COMADD+$6.6M+1,500,000$59.2M$65.8M14,430,81815,930,818
position key pos:12941 · issuer key iss:1993 COMNEW+$62.3M+320,242$0$62.3M—320,242
position key pos:16976 · issuer key iss:1084 COMADD+$29.0M+1,018,465$31.6M$60.7M1,047,1002,065,565
position key pos:14868 · issuer key iss:68 COMTRIM−$113M−2,359,980$173M$59.9M3,263,300903,320
position key pos:10550 · issuer key iss:929 COMADD+$15.6M+172,100$44.2M$59.8M172,700344,800
position key pos:16115 · issuer key iss:1869 COMADD+$40.1M+160,400$18.2M$58.3M55,000215,400
position key pos:12891 · issuer key iss:1146 CL A COMTRIM−$28.4M−171,900$83.2M$54.9M4,296,6034,124,703
position key pos:12595 · issuer key iss:1938 COMNEW+$53.8M+215,400$0$53.8M—215,400
position key pos:17867 · issuer key iss:28 COMNEW+$47.4M+840,000$0$47.4M—840,000
position key pos:11811 · issuer key iss:1566 COM CL AADD+$9.4M+1,313,700$35.2M$44.6M1,819,5003,133,200
position key pos:17145 · issuer key iss:966 COMTRIM+$3.0M−71,413$39.9M$43.0M674,716603,303
position key pos:14215 · issuer key iss:1733 COMTRIM−$57.2M−2,320,848$97.9M$40.7M5,322,9483,002,100
position key sid:sec:prov:b81812c88739bcffdc7e1785a869ac29 · issuer key cusip6:03937C COMADD+$29.1M+260,596$10.7M$39.8M143,750404,346
position key pos:12001 · issuer key iss:838 COMADD+$3.8M+1,844,517$34.8M$38.6M3,972,5465,817,063
position key pos:17752 · issuer key iss:1831 COMADD−$5.4M+36,700$43.3M$37.8M399,300436,000
position key pos:15581 · issuer key iss:2131 SHSNEW+$37.1M+335,300$0$37.1M—335,300
position key pos:10830 · issuer key iss:336 COMNEW+$37.0M+8,158,600$0$37.0M—8,158,600
position key pos:13136 · issuer key iss:1800 COMADD+$19.4M+291,100$17.5M$36.9M170,764461,864
position key pos:14707 · issuer key iss:1978 COMNEW+$36.3M+1,169,831$0$36.3M—1,169,831
position key pos:14779 · issuer key iss:1528 COMNEW+$36.1M+3,256,889$0$36.1M—3,256,889
position key pos:10468 · issuer key iss:1097 COMTRIM−$54.2M−718,023$89.9M$35.7M1,380,847662,824
position key pos:15088 · issuer key iss:1970 COMADD+$2.8M+189,200$29.1M$32.0M404,000593,200
position key pos:14538 · issuer key iss:1243 COMTRIM−$16.6M−56,500$39.3M$22.6M226,200169,700
position key pos:12687 · issuer key iss:419 COMTRIM−$20.1M−354,620$41.6M$21.5M1,011,199656,579
position key pos:15053 · issuer key iss:1066 CL ANEW+$21.1M+366,095$0$21.1M—366,095
position key pos:10172 · issuer key iss:1332 COMNEW+$19.8M+117,212$0$19.8M—117,212
position key pos:18172 · issuer key iss:766 COMNEW+$18.9M+485,782$0$18.9M—485,782
position key pos:15047 · issuer key iss:135 COMNEW+$18.2M+62,000$0$18.2M—62,000
position key pos:15283 · issuer key iss:1958 COMTRIM−$7.5M−240,133$23.8M$16.3M793,500553,367
position key pos:10770 · issuer key iss:205 COMNEW+$13.5M+92,248$0$13.5M—92,248
position key pos:16840 · issuer key iss:1944 COMTRIM−$131M−1,494,179$144M$13.3M1,637,238143,059
pos:11321EXIT‡e−$86.7M−1,991,400$86.7M$01,991,400—
pos:11398EXIT‡e−$14.2M−985,106$14.2M$0985,106—
pos:13195EXIT‡e−$66.7M−1,393,516$66.7M$01,393,516—
pos:13557EXIT‡e−$32.4M−3,365,400$32.4M$03,365,400—
pos:14305EXIT‡e−$34.8M−306,641$34.8M$0306,641—
sid:sec:prov:d6da6bdaa506dd8093af2511267629daEXIT‡e−$9.7M−2,204,100$9.7M$02,204,100—
sid:sec:prov:e7f112277413db78c47072ed9dcfe559EXIT‡e−$87.2M−2,105,556$87.2M$02,105,556—

Flags: no row carries a flag.

1–20 of the 51 changes on this page

Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.
Truncated by Public Filings. Changes compare every position with a security identifier, new and exited included; holdings without one are counted, not compared. methodology §13F ↗

Reported positions — 2026-03-31

1–44 of 44 positions · $3.1B disclosed value over 44 rows · 0 undisclosed-value rows
View
This build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.
Positions Maple Rock Capital Partners Inc. reported for the quarter ended 2026-03-31, as that filer reported them
This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names.a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filingShare of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets.value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0SharesWt
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)WESTERN DIGITAL CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$379M1,400,43412.3%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)EQUINOX GOLD CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$281M19,424,6489.1%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)SEAGATE TECHNOLOGY HLDNGS PL · ORD SHS CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$209M533,9856.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CLEVELAND-CLIFFS INC NEW · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$175M20,745,5575.7%
—TFI INTL INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
ticker not yet mapped
$148M1,361,8314.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)BROOKDALE SR LIVING INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$112M8,157,1483.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)SANDISK CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$106M166,5003.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)BRITISH AMERN TOB PLC · SPONSORED ADR CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$92.9M1,589,1003.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)JD.COM INC · SPON ADS CL A CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$89.5M3,026,2622.9%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LOUISIANA PAC CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$80.9M1,112,5592.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CVS HEALTH CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$75.3M1,048,1002.4%
—ARCELORMITTAL SA LUXEMBOURG · NY REGISTRY SH CUSIP 03938L203
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
ticker not yet mapped
$73.5M1,414,2652.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ADVANCE AUTO PARTS INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$68.5M1,298,1402.2%
—ALGOMA STL GROUP INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
ticker not yet mapped
$65.8M15,930,8182.1%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)XPO INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$62.3M320,2422.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LKQ CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$60.7M2,065,5652.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ALCOA CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$59.9M903,3201.9%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)HUMANA INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$59.8M344,8001.9%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)UNITEDHEALTH GROUP INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$58.3M215,4001.9%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LYFT INC · CL A COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$54.9M4,124,7031.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)WABTEC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$53.8M215,4001.8%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ACADEMY SPORTS & OUTDOORS IN · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$47.4M840,0001.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ROCKET COS INC · COM CL A CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$44.6M3,133,2001.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)INGEVITY CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$43.0M603,3031.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)SUNRUN INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$40.7M3,002,1001.3%
—ARCBEST CORP · COM CUSIP 03937C105
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
ticker not yet mapped
$39.8M404,3461.3%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)GOODYEAR TIRE & RUBR CO · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$38.6M5,817,0631.3%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)TURNING PT BRANDS INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$37.8M436,0001.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ICON PLC · SHS CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$37.1M335,3001.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)B2GOLD CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$37.0M8,158,6001.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)THOR INDS INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$36.9M461,8641.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)WINNEBAGO INDS INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$36.3M1,169,8311.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)RAYONIER ADVANCED MATLS INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$36.1M3,256,8891.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)LAS VEGAS SANDS CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$35.7M662,8241.2%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)WHIRLPOOL CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$32.0M593,2001.0%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)MOLINA HEALTHCARE INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$22.6M169,7000.7%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)CENTENE CORP DEL · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$21.5M656,5790.7%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)KNIGHT-SWIFT TRANSN HLDGS IN · CL A CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$21.1M366,0950.7%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)NUCOR CORP · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$19.8M117,2120.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)FORTUNE BRANDS INNOVATIONS I · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$18.9M485,7820.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)ELEVANCE HEALTH INC FORMERLY · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$18.2M62,0000.6%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)WERNER ENTERPRISES INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$16.3M553,3670.5%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)AVIS BUDGET GROUP INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$13.5M92,2480.4%
verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)WARRIOR MET COAL INC · COM CUSIP —
quarter ended 2026-03-31 filed filed 2026-05-15 +45d
$13.3M143,0590.4%

1–20 of 44 positions

Change kind and share change are in Position changes above; Congress overlap is planned.

1–44 of 44 positions · page 1 of 1
One line per issuer, largest first; a row with no issuer key stands on its own line. Open a line for its rows as this filer reported them. The list holds every row this filer reported for the quarter. Issuer totals on the holders pages count each manager's own report once; that never removes a row here. how positions are grouped ↗

Book shape

2026-03-31 · concentration · vs tracked median · tick = median
Top-25 concentration
82.7%above median 80.0%
Concentration index
459 bpsabove median 446 bps
Positions with value
44 / 44median book 97.5 positions

Concentration uses reported 13F long value, not total assets. The index is withheld when any position lacks a value. Medians are over the 8,748 tracked filers with a 2026-03-31 book; the index median over the 8,662 with a complete book.

holdings whose <value> did not parse — retained and counted, never zero-filled: 0 · share of the period's disclosed value held in the top-N positions; denominator is reported 13F value, not total assets: 82.7% · integer Herfindahl–Hirschman index in basis points over disclosed position values: 459 · QoQ moves: 51

Filing history

AVAILABLE QUARTERS
Available filing periods
PeriodSource
2026-03-31EDGAR ↗

PLANNED sector rotation · Congress overlap · signals for this filer

Complete source filings on SEC EDGAR

The complete filing on EDGAR.

The position list above is served from the published Public Filings build, each position as this filer reported it; where the page cannot embed every reported row, the list says how many it leaves out. This block is provenance, not a substitute: the filing itself is the record, and it is one click away. Public Filings decided on 2026-08-01 to serve this list from its published build; filings newer than this build are on EDGAR.

Open Maple Rock Capital Partners Inc.'s 13F filings on SEC EDGAR ↗
Notes on this data

Quarter-end holdings as filed

Explore the full published position list and its source filing. This record excludes the manager’s cash, shorts and non-13(f) assets.

Compare consecutive quarters

Position changes retain the producer’s classification and comparability flags. Share counts and reported values describe different changes.

A snapshot, not current holdings

Use the quarter selector to inspect available periods. Unknown values stay unknown and each table states its coverage.

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings. A position may have been changed or closed before you ever see it, and is older still by however long ago that quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars with unit_basis carried on every record.

Affiliated managers may report the same position (otherManager), so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice (ARCHITECTURE.md §5.2 / M2-CONTRACT §5).