undamentalytics Newsletter

Core Natural Resources, Inc. insider trading

Every open-market purchase and sale by Core Natural Resources, Inc.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

No insider has bought shares on the open market in five years.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Core Natural Resources, Inc. insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Core Natural Resources, Inc.’s insiders pay?

From December 12, 2017 to March 20, 2026, 14 insiders reported 5 open-market purchases and 27 sales not made under a pre-set plan in Core Natural Resources, Inc. Twelve months after each purchase was reported, the shares were −0.9% against the S&P 500 on average (median +13.2%), over 5 purchases with a full year of prices; 60% beat the index. After sales, the shares moved +8.1% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on December 13, 2017 into $16,891 by November 2, 2026, +6.1% a year. It held shares 39% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $21,026 (+8.8% a year), and held throughout $32,549 (+14.3%).

$0$10.0k$20.0k$30.0k 20172019202120232025 $32.5k$21.0k$16.9k
Copying Core Natural Resources, Inc.'s insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Core Natural Resources, Inc.'s insiders from December 13, 2017, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 39% of the time.
Core Natural Resources, Inc.: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Mills John T Director 3 −0.9% (3) 67% 5 +34.9% (5) August 16, 2023
Rothka John Chief Accounting Officer 0 — — 5 +6.0% (3) March 19, 2026
Wiegand Martha A General Counsel & Secretary 0 — — 4 +13.1% (4) August 14, 2023
Brock James A Executive Chair and CEO 0 — — 2 +10.9% (1) March 19, 2026
Navarre Richard A Director 0 — — 2 −14.7% (1) March 11, 2026
Platt Joseph P Jr Director 0 — — 2 −13.6% (2) September 19, 2023
Salvatori Kurt R. Chief Administrative Officer 0 — — 2 +0.4% (2) August 14, 2023
Bergeron Sophie Director 0 — — 1 +25.6% (1) May 12, 2022
Klein Rosemary L SVP, CLO & Corp. Sec. 0 — — 1 — March 20, 2026
Koeppel Holly K Director 0 — — 1 +24.1% (1) April 2, 2025
Kriegshauser Patrick A Director 0 — — 1 +6.3% (1) September 18, 2025
Lang Paul A Chief Executive Officer 1 −16.0% (1) 0% 0 — May 12, 2025
Mccaffrey James J. SVP - Coal Marketing 0 — — 1 −93.3% (1) March 5, 2019
Roberson Ed Director 1 +14.3% (1) 100% 0 — February 23, 2018

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Core Natural Resources, Inc.

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Core Natural Resources, Inc. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 1 buying crowd with six months of prices, it averaged +22.3% against the index. After 3 selling crowds, +2.7%. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
March 31, 20264 selling−40.7%−35.7%not yet
August 31, 20233 selling+22.3%−9.7%−12.8%
May 31, 20223 selling+41.9%+53.4%+11.1%
February 28, 20182 buying+37.0%+22.3%+15.9%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Total returns from the month end; past patterns are not a forecast.

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