Maple Rock Capital Partners Inc.
CIK 1658363 · EDGAR ↗
- sum of disclosed values for 2026-03-31; 0 positions have no disclosed value and are left out of the sum, counted here rather than dropped
- $3.1B
- every reported holding for this filer and quarter, including ones with no disclosed value
- 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
Quarter-end snapshot, filed up to 45 days later — not current holdings. What a 13F covers ↓
Changes · Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.
by shares · How classified ↗Period
| The reviewed ticker for the filed issuer name and share class, the same mapping the Reported positions table uses. Symbols are never inferred from names; — means no reviewed mapping. | position matched across quarters by exact reported CUSIP over a registry gap — never a name match | NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the 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 | derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero | Prev value | Curr value | Prev shares | Curr shares | |
|---|---|---|---|---|---|---|---|---|
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:15598 · issuer key iss:1962 | TRIM | −$31.5M | −981,091 | $410M | $379M | 2,381,525 | 1,400,434 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:10929 · issuer key iss:676 | TRIM | −$3.4M | −809,400 | $284M | $281M | 20,234,048 | 19,424,648 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: ORD SHS · position key pos:15578 · issuer key iss:2205 | TRIM | +$25.8M | −131,867 | $183M | $209M | 665,852 | 533,985 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:10241 · issuer key iss:467 | ADD | +$11.2M | +8,387,327 | $164M | $175M | 12,358,230 | 20,745,557 |
| — | share class as filed: COM · position key pos:11894 · issuer key iss:1744 | NEW | +$148M | +1,361,831 | $0 | $148M | — | 1,361,831 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:10784 · issuer key iss:324 | TRIM | +$19.9M | −339,900 | $91.7M | $112M | 8,497,048 | 8,157,148 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:12331 · issuer key iss:1618 | TRIM | −$10.1M | −321,800 | $116M | $106M | 488,300 | 166,500 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: SPONSORED ADR · position key pos:13452 · issuer key iss:320 | TRIM | −$808K | −66,200 | $93.7M | $92.9M | 1,655,300 | 1,589,100 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: SPON ADS CL A · position key pos:11844 · issuer key iss:1030 | ADD | +$34.4M | +1,106,100 | $55.1M | $89.5M | 1,920,162 | 3,026,262 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:15163 · issuer key iss:1140 | ADD | +$33.4M | +523,691 | $47.6M | $80.9M | 588,868 | 1,112,559 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:13354 · issuer key iss:367 | ADD | +$10.5M | +231,700 | $64.8M | $75.3M | 816,400 | 1,048,100 |
| — | share class as filed: NY REGISTRY SH · position key sid:sec:prov:dfc258937165c462fd1ad3d4e37e4beb · issuer key cusip6:03938L | TRIM | −$793K | −216,335 | $74.3M | $73.5M | 1,630,600 | 1,414,265 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:14373 · issuer key iss:41 | TRIM | +$15.3M | −54,100 | $53.1M | $68.5M | 1,352,240 | 1,298,140 |
| — | share class as filed: COM · position key pos:17865 · issuer key iss:2328 | ADD | +$6.6M | +1,500,000 | $59.2M | $65.8M | 14,430,818 | 15,930,818 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:12941 · issuer key iss:1993 | NEW | +$62.3M | +320,242 | $0 | $62.3M | — | 320,242 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:16976 · issuer key iss:1084 | ADD | +$29.0M | +1,018,465 | $31.6M | $60.7M | 1,047,100 | 2,065,565 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:14868 · issuer key iss:68 | TRIM | −$113M | −2,359,980 | $173M | $59.9M | 3,263,300 | 903,320 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:10550 · issuer key iss:929 | ADD | +$15.6M | +172,100 | $44.2M | $59.8M | 172,700 | 344,800 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:16115 · issuer key iss:1869 | ADD | +$40.1M | +160,400 | $18.2M | $58.3M | 55,000 | 215,400 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: CL A COM · position key pos:12891 · issuer key iss:1146 | TRIM | −$28.4M | −171,900 | $83.2M | $54.9M | 4,296,603 | 4,124,703 |
Flags: no row carries a flag.
1–20 of the 51 changes on this page
Holdings without a security ID are counted, not compared. Method ↗
Reported positions — 2026-03-31
44 positionsViewThis build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.
| 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 filing | Share 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 $0 | Shares | Wt |
|---|---|---|---|---|---|
| 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 | $379M | 1,400,434 | 12.3% | |
| 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 | $281M | 19,424,648 | 9.1% | |
| 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 | $209M | 533,985 | 6.8% | |
| 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 | $175M | 20,745,557 | 5.7% | |
| — | TFI INTL INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $148M | 1,361,831 | 4.8% | |
| 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 | $112M | 8,157,148 | 3.6% | |
| 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 | $106M | 166,500 | 3.4% | |
| 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 | $92.9M | 1,589,100 | 3.0% | |
| 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 | $89.5M | 3,026,262 | 2.9% | |
| 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 | $80.9M | 1,112,559 | 2.6% | |
| 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 | $75.3M | 1,048,100 | 2.4% | |
| — | ARCELORMITTAL SA LUXEMBOURG · NY REGISTRY SH CUSIP 03938L203 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $73.5M | 1,414,265 | 2.4% | |
| 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 | $68.5M | 1,298,140 | 2.2% | |
| — | ALGOMA STL GROUP INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $65.8M | 15,930,818 | 2.1% | |
| 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 | $62.3M | 320,242 | 2.0% | |
| 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 | $60.7M | 2,065,565 | 2.0% | |
| 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 | $59.9M | 903,320 | 1.9% | |
| 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 | $59.8M | 344,800 | 1.9% | |
| 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 | $58.3M | 215,400 | 1.9% | |
| 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 | $54.9M | 4,124,703 | 1.8% | |
| 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 | $53.8M | 215,400 | 1.8% | |
| 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 | $47.4M | 840,000 | 1.5% | |
| 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 | $44.6M | 3,133,200 | 1.5% | |
| 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 | $43.0M | 603,303 | 1.4% | |
| 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 | $40.7M | 3,002,100 | 1.3% | |
| — | ARCBEST CORP · COM CUSIP 03937C105 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $39.8M | 404,346 | 1.3% | |
| 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 | $38.6M | 5,817,063 | 1.3% | |
| 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 | $37.8M | 436,000 | 1.2% | |
| 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 | $37.1M | 335,300 | 1.2% | |
| 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 | $37.0M | 8,158,600 | 1.2% | |
| 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 | $36.9M | 461,864 | 1.2% | |
| 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 | $36.3M | 1,169,831 | 1.2% | |
| 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 | $36.1M | 3,256,889 | 1.2% | |
| 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 | $35.7M | 662,824 | 1.2% | |
| 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 | $32.0M | 593,200 | 1.0% | |
| 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 | $22.6M | 169,700 | 0.7% | |
| 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 | $21.5M | 656,579 | 0.7% | |
| 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 | $21.1M | 366,095 | 0.7% | |
| 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 | $19.8M | 117,212 | 0.6% | |
| 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 | $18.9M | 485,782 | 0.6% | |
| 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 | $18.2M | 62,000 | 0.6% | |
| 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 | $16.3M | 553,367 | 0.5% | |
| 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 | $13.5M | 92,248 | 0.4% | |
| 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 | $13.3M | 143,059 | 0.4% |
1–20 of 44 positions
1–44 of 44 positions · page 1 of 1
One line per issuer, largest first — open a line for its reported rows. Grouping ↗
Book shape
Tick = median of the 8,748 tracked filers with a 2026-03-31 book (the index median: the 8,662 with a complete book). Concentration uses reported 13F long value, not total assets; the index is withheld when any position lacks a value.- 82.7%above median 80.0%
- integer Herfindahl–Hirschman index in basis points over disclosed position values
- 459 bpsabove median 446 bps
- holdings with no disclosed value (undisclosed, or unreadable on the filing) — kept and counted, never shown as zero
- 44 / 44median book 97.5 positions
51 quarter-over-quarter rows
Filing history
| Period | Source |
|---|---|
| 2026-03-31 | EDGAR ↗ |
Complete source filings on SEC EDGAR
The filing on EDGAR is the record, including any filed after this build.
Open Maple Rock Capital Partners Inc.'s 13F filings on SEC EDGAR ↗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 changed or closed since the 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; each record notes its original unit.
Affiliated managers may report the same position, 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.