Filer Snapshot

Maple Rock Capital Partners Inc.

CIK 0001658363. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

70

Latest filing

15 May 2026

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13F-HR for Q1 2026. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

WDC

$378.8M reported value

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13D/G large stake

ASTL

31 Mar 2026 · 15% ownership

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Source: SEC Schedule 13D/G

SCHEDULE 13G/A filed on 15 May 2026 for CIK 0001658363.

View Source Filing
Identity 1 fact
Business address
21 St. Clair Avenue East, Suite 1100, Toronto, Ontario, Canada, M4T 1L9
SEC ownership signals 5 facts
Ownership coverage

13F reported value

$3.07B

Latest parsed Form 13F market value.

Form 3/4/5 holdings value

$22.89M

Estimated from parsed insider ownership filings when values are disclosed.

Largest 13F symbols

WDC, EQX, STX, CLF

Largest symbols in the latest parsed Form 13F information table.

Top disclosed positions
GRPN
Largest 13F holdings
WDC EQX STX CLF TFII BKD SNDK BTI
+12 moreJD LPX CVS MT AAP ASTL XPO LKQ AA HUM UNH LYFT
Schedule 13D positions
ASTL
Schedule 13G positions
ASTL HUYA
SEC filing record 2 facts
State of incorporation
Canada (Federal Level)
Fiscal year end
31 December

Filer intelligence

What SEC filings say about Maple Rock Capital Partners Inc.

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

  • Latest parsed 13F shows $3.07B across 44 reported holdings for Q1 2026.
  • Largest parsed 13F holding: WDC at $378.8M.
  • 2 recent 13D/G stake rows found; top row is ASTL at 15% ownership.
  • Forms 3/4/5 show insider context for GRPN worth $22.89M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio 44 rows

Quarterly institutional portfolio holdings.

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13D/G stakes 2 rows

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 1 rows

Officer, director, and 10% owner holdings or transactions.

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Top parsed 13F holdings

Visual share of the latest parsed 13F portfolio. Values are reported market value, not a recommendation.

Q1 2026 - 15 May 2026

Top 5 concentration

39%

Share of latest parsed 13F value represented by the visible holdings below.

Top 5 reported value

$1.19B

Compared with $3.07B total 13F value.

Top 5 net change

-$109.93M

Position-value change inside the visible top holdings only.

13F concentration map

A simple visual split of the latest parsed 13F portfolio.

Largest add: TFII · Largest trim: WDC

WDC EQX STX CLF TFII Other holdings

WDC

12.3%

Western Digital Corp

$378.8M

EQX

9.1%

Equinox Gold Corp

$280.79M

STX

6.8%

Seagate Technology Hldngs Pl

$209.19M

CLF

5.7%

Cleveland Cliffs Inc New

$175.3M

TFII

4.8%

Tfi Intl Inc

$147.94M

13D/G large-stake context

ASTL

31 Mar 2026 · Common Shares, no par value

15%
Issuer page 13D/G history

HUYA

31 Dec 2024 · American Depositary Shares, each representing one Class A ordinary share, par value US$0.0001 per share

0%
Issuer page 13D/G history

Forms 3/4/5 insider context

GRPN

18 Aug 2022 · 10% owner

$22.89M
Issuer page Owner page

Latest update

What changed recently for Maple Rock Capital Partners Inc.

New filing available

Latest Schedule 13D/G period: 31 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

15 May 2026

Page type

Filer profile

Latest period

31 Mar 2026

Schedule 13D/G context is visible from filings filed on 15 May 2026.

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Benchmark Context

Benchmark context for this company

Maple Rock Capital Partners Inc. has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

Compared with

Start on the facts page for period-to-period context, then open a metric ranking when you want to compare the same reported fact across other SEC-reporting companies.

Why this is notable

Latest Schedule 13D/G period: 31 Mar 2026. That gives you a fresh baseline before you compare this company with peers.

  • Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
  • Open the facts page first if you want the cleanest path to verification.

Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.

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SEC filing record

CIK 0001658363 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
70
First seen
16 Feb 2016
Latest filing
15 May 2026
Entity
Company

Observed form types

SCHEDULE 13G/A 13F-HR SCHEDULE 13G SCHEDULE 13D/A N-PX SC 13G/A SC 13G SC 13D 4 3

Primary evidence

Open SEC filing index Maple Rock Capital Partners Inc. SEC filings Maple Rock Capital Partners Inc. 13F portfolio Maple Rock Capital Partners Inc. 13D/G history Maple Rock Capital Partners Inc. owner filings

Latest Filings

Showing the latest 12 of 70 SEC filings for Maple Rock Capital Partners Inc..

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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
15 May 2026
Reporting date
Not listed
SEC evidence
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13F-HR File 028-17337

13F-HR filing

Filing date
15 May 2026
Reporting date
31 Mar 2026
SEC evidence
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13F-HR File 028-17337

13F-HR filing

Filing date
17 Feb 2026
Reporting date
31 Dec 2025
SEC evidence
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13F-HR File 028-17337

13F-HR filing

Filing date
14 Nov 2025
Reporting date
30 Sep 2025
SEC evidence
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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
07 Nov 2025
Reporting date
Not listed
SEC evidence
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SCHEDULE 13G

SCHEDULE 13G filing

Filing date
28 Aug 2025
Reporting date
Not listed
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
14 Aug 2025
Reporting date
Not listed
SEC evidence
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13F-HR File 028-17337

13F-HR filing

Filing date
14 Aug 2025
Reporting date
30 Jun 2025
SEC evidence
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N-PX File 028-17337

N-PX filing

Filing date
08 Aug 2025
Reporting date
30 Jun 2025
SEC evidence
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13F-HR File 028-17337

13F-HR filing

Filing date
15 May 2025
Reporting date
31 Mar 2025
SEC evidence
Open document Open filing
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
05 May 2025
Reporting date
Not listed
SEC evidence
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Next action
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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
14 Feb 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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