Core Natural Resources, Inc.
US ˙ NYSE ˙ US20854L1089

SecurityCNR / Core Natural Resources, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership3,977,324 shares
Ownership 7.80%
State Street Corp ownership in CNR / Core Natural Resources, Inc.

2026-05-12 - State Street Corp has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,977,324 shares of Core Natural Resources, Inc. (US:CNR). This represents 7.8 percent ownership of the company. In their previous filing dated 2025-11-10 , State Street Corp had reported owning 3,439,517 shares, indicating an increase of 15.64 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-05-12 2026-05-12 13G 3,439,517 3,977,324 15.64 7.80 16.42
2025-11-10 2025-11-10 13G 2,875,231 3,439,517 19.63 6.70 24.07
2025-05-13 2025-05-13 13G 2,875,231 5.40

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F CORE NATURAL RESOURCES COM SHS 218937100 3,977,324 269,882 7.28 416,545 26.94 0.0144
2026-02-13 2025-12-31 13F CORE NATURAL RESOURCES COM SHS 218937100 3,707,442 267,925 7.79 328,146 14.28 0.0110
2025-11-14 2025-09-30 13F CORE NATURAL RESOURCES COM SHS 218937100 3,439,517 269,974 8.52 287,131 29.90 0.0100
2025-08-14 2025-06-30 13F CORE NATURAL RESOURCES COM SHS 218937100 3,169,543 294,312 10.24 221,044 -0.29 0.0083
2025-05-15 2025-03-31 13F CORE NATURAL RESOURCES COM SHS 218937100 2,875,231 1,733,632 151.86 221,680 692.90 0.0091
2022-08-15 2022-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 1,141,599 71,327 6.66 27,958 7.41 0.0017
2022-05-16 2022-03-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 1,070,272 26,954 2.58 26,029 43.06 0.0013
2022-02-14 2021-12-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 1,043,318 54,522 5.51 18,195 25.95 0.0009
2021-11-15 2021-09-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 988,796 51,412 5.48 14,446 -15.23 0.0008
2021-08-16 2021-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 937,384 128,962 15.95 17,042 50.26 0.0009
2021-07-09 2021-03-31 13F/A-1 CORNERSTONE BLDG BRANDS COM 21925D109 808,422 -24,067 -2.89 11,342 46.82 0.0007
2021-05-17 2021-03-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 808,422 -24,067 11,342 0.0007
2021-02-16 2020-12-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 832,489 -52,854 -5.97 7,725 9.34 0.0005
2020-11-10 2020-09-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 885,343 -43,702 -4.70 7,065 25.49 0.0005
2020-08-14 2020-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 929,045 -25,870 -2.71 5,630 29.31 0.0004
2020-06-19 2020-03-31 13F/A-1 CORNERSTONE BLDG BRANDS COM 21925D109 954,915 22,221 2.38 4,354 -45.14 0.0004
2020-05-11 2020-03-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 954,915 22,221 4,354 382.3689
2020-02-06 2019-12-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 932,694 40,871 4.58 7,937 47.09 0.0005
2019-11-14 2019-09-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 891,823 -28,250 -3.07 5,396 0.60 0.0004
2019-08-14 2019-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 920,073 920,073 5,364 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.