Hallador Energy holder reports 3.0% ownership stake

Hallador Energy Co shareholder Mark D. Becker filed an amended ownership report showing beneficial ownership of 1,437,573 shares of common stock.

Rhea-AI Filing Summary

Hallador Energy Co shareholder Mark D. Becker filed an amended ownership report showing beneficial ownership of 1,437,573 shares of common stock. This represents 3.0% of Hallador Energy’s common stock, based on 47,143,357 shares outstanding as of August 6, 2026.

The holdings consist of 180,745 shares held by The MDB Irrevocable Trust dated March 24, 2023 and 1,256,828 shares held by The Mark D. Becker Living Trust dated March 29, 2021, for both of which Becker has sole voting and dispositive power. The filing indicates ownership of 5 percent or less of the class.

Key Figures

Shares beneficially owned: 1,437,573 shares Percentage of class: 3.0% Shares outstanding: 47,143,357 shares +3 more

6 metrics

Shares beneficially owned 1,437,573 shares Total Hallador Energy Co common stock beneficially owned by Mark D. Becker

Percentage of class 3.0% Portion of Hallador Energy Co common stock beneficially owned by Becker

Shares outstanding 47,143,357 shares Hallador Energy Co common stock outstanding as of August 6, 2026

MDB Irrevocable Trust holdings 180,745 shares Common stock held by The MDB Irrevocable Trust dated March 24, 2023

Living Trust holdings 1,256,828 shares Common stock held by The Mark D. Becker Living Trust dated March 29, 2021

Sole voting power 1,437,573 shares Shares over which Becker has sole power to vote or direct the vote

Key Terms

beneficially owned, sole voting power, sole dispositive power, percent of class, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: See Row 9 of cover page."

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"5 | Sole Voting Power 1,437,573.00 6 | Shared Voting Power 0.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"7 | Sole Dispositive Power 1,437,573.00 8 | Shared Dispositive Power 0.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

percent of class financial

"Item 4. | Ownership (b) | Percent of class: See Row 11 of cover page."

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

Ownership of 5 percent or less of a class financial

"Item 5. | Ownership of 5 Percent or Less of a Class."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many HNRG shares does Mark D. Becker beneficially own in this Schedule 13G/A?

Mark D. Becker beneficially owns 1,437,573 shares of Hallador Energy Co common stock. This total includes shares held in two trusts over which he has sole voting and dispositive power.

What percentage of Hallador Energy Co (HNRG) does Mark D. Becker own?

Mark D. Becker owns 3.0% of Hallador Energy Co’s common stock. This percentage is calculated based on 47,143,357 shares outstanding as of August 6, 2026, as reported in a recent quarterly report.

How are Mark D. Becker’s HNRG shares held according to this filing?

His 1,437,573 shares are held through two trusts: 180,745 shares in The MDB Irrevocable Trust and 1,256,828 shares in The Mark D. Becker Living Trust, with sole voting and dispositive power over both.

Does Mark D. Becker share voting or dispositive power over his HNRG shares?

No. The filing shows sole voting power over 1,437,573 shares and sole dispositive power over 1,437,573 shares, with 0 shares reported as having shared voting or dispositive power.

Is Mark D. Becker a 5% or greater shareholder of Hallador Energy Co (HNRG)?

No. The amended ownership report states that he holds 3.0% of the common stock and is reporting under the category “Ownership of 5 percent or less of a class.”

What share count was used to calculate Mark D. Becker’s ownership percentage in HNRG?

The 3.0% ownership figure is based on 47,143,357 shares of Hallador Energy Co common stock outstanding as of August 6, 2026, as reported in the company’s Quarterly Report on Form 10-Q.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/11/2026 - 08:14 PM Accepted by SEC EDGAR 08/11/2026 - 08:13 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Hallador Energy Co

(Name of Issuer)

Common Stock

(Title of Class of Securities)

40609P105

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 40609P105

1

Names of Reporting Persons

Mark D. Becker

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,437,573.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,437,573.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,437,573.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.0 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: (1) Rows 5, 7 and 9: Consists of (i) 180,745 shares of Common Stock, par value $0.01 per share ("Common Stock"), of Hallador Energy Co (the "Company") held of record by The MDB Irrevocable Trust Dated March 24, 2023, for which Mr. Becker has sole voting and dispositive power, and (ii) 1,256,828 shares of Common Stock held of record by The Mark D. Becker Living Trust Dated March 29, 2021, for which Mr. Becker has sole voting and dispositive power. (2) Row 11: Percentage ownership is based on 47,143,357 shares of Common Stock outstanding as of August 6, 2026, as reported in the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 10, 2026.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Hallador Energy Co
(b)	Address of issuer's principal executive offices: 1183 East Canvasback Drive, Terre Haute, Indiana 47802
Item 2.
(a)	Name of person filing: Mark D. Becker
(b)	Address or principal business office or, if none, residence: 4234 E. Indian School Road, Phoenix, Arizona 85018
(c)	Citizenship: The Reporting Person is a citizen of the United States of America.
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 40609P105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See Row 9 of cover page.
(b)	Percent of class: See Row 11 of cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See Row 5 of cover page.
	(ii) Shared power to vote or to direct the vote: See Row 6 of cover page.
	(iii) Sole power to dispose or to direct the disposition of: See Row 7 of cover page.
	(iv) Shared power to dispose or to direct the disposition of: See Row 8 of cover page.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Mark D. Becker

Signature:	/s/ Mark D. Becker
Name/Title:	Mark D. Becker
Date:	08/11/2026