Core Natural Resources, Inc.
US ˙ NYSE ˙ US20854L1089

SecurityCNR / Core Natural Resources, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership83,107 shares
Latest Disclosed Value $ 7,355,801
Barclays Plc ownership in CNR / Core Natural Resources, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 83,107 shares of Core Natural Resources, Inc. (US:CNR) valued at $7,355,801 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 82,115 shares of Core Natural Resources, Inc.. This represents a change in shares of 1.21% during the quarter. The current value of the position is $8,014,008 USD.

Barclays Plc has a history of taking positions in derivatives of the underlying security (CNR) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CNR / Core Natural Resources, Inc. Historical Put/Call Ratio
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)
2026-02-13 2025-12-31 13F CORE NATURAL RESOURCES COM 218937100 83,107 992 1.21 7,356 7.31 0.0018
2026-03-31 2025-09-30 13F/A-3 CORE NATURAL RESOURCES COM 218937100 82,115 -26,148 -24.15 6,855 -9.22 0.0015
2025-11-12 2025-09-30 13F CORE NATURAL RESOURCES COM 218937100 82,115 -26,148 6,855 0.0015
2026-02-27 2025-06-30 13F/A-2 CORE NATURAL RESOURCES COM 218937100 108,263 36,778 51.45 7,550 37.00 0.0017
2025-08-14 2025-06-30 13F/A-1 CORE NATURAL RESOURCES COM 218937100 108,263 36,778 8 0.0017
2025-08-13 2025-06-30 13F CORE NATURAL RESOURCES COM 218937100 108,263 36,778 8 0.0006
2026-03-17 2025-03-31 13F/A-1 CORE NATURAL RESOURCES COM 218937100 71,485 -940 -1.30 5,511 210.65 0.0016
2025-05-15 2025-03-31 13F CORE NATURAL RESOURCES COM 218937100 71,485 -940 6 0.0016
2022-08-12 2022-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 72,425 8,694 13.64 1,774 14.45 0.0011
2022-05-16 2022-03-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 63,731 -17,416 -21.46 1,550 9.54 0.0012
2022-02-23 2021-12-31 13F/A-1 CORNERSTONE BLDG BRANDS COM 21925D109 81,147 38,865 91.92 1,415 128.96 0.0005
2022-02-14 2021-12-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 81,147 38,865 1,415 0.0005
2021-11-09 2021-09-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 42,282 13,965 49.32 618 20.00 0.0003
2021-08-13 2021-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 28,317 -43,237 -60.43 515 -48.76 0.0002
2021-05-13 2021-03-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 71,554 -14,799 -17.14 1,005 25.31 0.0005
2021-02-11 2020-12-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 86,353 -2,186 -2.47 802 13.76 0.0004
2020-11-12 2020-09-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 88,539 -24,941 -21.98 705 2.32 0.0004
2020-08-12 2020-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 113,480 28,633 33.75 689 78.04 0.0005
2020-05-13 2020-03-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 84,847 29,807 54.16 387 -17.31 0.0003
2020-02-10 2019-12-31 13F CORNERSTONE BLDG BRANDS COM 21925D109 55,040 7,754 16.40 468 63.07 0.0003
2019-11-15 2019-09-30 13F/A-1 CORNERSTONE BLDG BRANDS COM 21925D109 47,286 -23,930 -33.60 287 -31.01 0.0002
2019-11-14 2019-09-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 47,286 287
2019-08-14 2019-06-30 13F CORNERSTONE BLDG BRANDS COM 21925D109 71,216 71,216 416 0.0003
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-08-12 2020-06-30 13F CORNERSTONE BLDG BRANDS OPT Put 0 -100.00 0 n/a n/a n/a
2020-05-13 2020-03-31 13F CORNERSTONE BLDG BRANDS OPT Put 100 -83.33 0 -100.00 n/a n/a n/a
2020-02-10 2019-12-31 13F CORNERSTONE BLDG BRANDS OPT Put 600 -14.29 5 25.00 n/a n/a n/a
2019-11-15 2019-09-30 13F/A CORNERSTONE BLDG BRANDS OPT Put 700 250.00 4 300.00 n/a n/a n/a
2019-11-14 2019-09-30 13F CORNERSTONE BLDG BRANDS OPT Put 700 4 n/a n/a n/a
2019-08-14 2019-06-30 13F CORNERSTONE BLDG BRANDS OPT Put 200 1 n/a n/a n/a
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.