Mammoth Energy holders back directors, pay and auditor

Mammoth Energy Services, Inc. reported the results of its annual stockholder meeting held on June 25, 2026 in Oklahoma City.

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Form Type

8-K

Rhea-AI Filing Summary

Mammoth Energy Services, Inc. reported the results of its annual stockholder meeting held on June 25, 2026 in Oklahoma City. Stockholders elected six directors – Arthur Amron, Corey Booker, Paul Jacobi, Phil Lancaster, James Palm and Mark Plaumann – to serve until the 2027 annual meeting.

They also approved, on an advisory basis, the compensation of the company’s named executive officers and indicated a preference for holding the advisory vote on executive compensation every year, with 35,911,762 votes cast for an annual frequency. In addition, stockholders ratified the appointment of Carr, Riggs & Ingram L.L.C. as independent registered public accounting firm for the fiscal year ending December 31, 2026.

8-K Event Classification

Item 5.07 — Submission of Matters to a Vote of Security Holders

1 item

Item 5.07 Submission of Matters to a Vote of Security Holders Governance

Results of a shareholder vote on proposals at an annual or special meeting.

Key Figures

Votes for say-on-pay: 36,252,635 votes Annual say-on-pay preference: 35,911,762 votes Auditor ratification for 2026: 42,054,219 votes for +2 more

5 metrics

Votes for say-on-pay 36,252,635 votes Advisory approval of executive compensation (Proposal 2)

Annual say-on-pay preference 35,911,762 votes Votes for 1-year frequency on executive pay vote (Proposal 3)

Auditor ratification for 2026 42,054,219 votes for Ratification of Carr, Riggs & Ingram L.L.C. (Proposal 4)

Director vote example - Corey Booker 36,086,616 votes for Election as director until 2027 annual meeting

Director vote example - Phil Lancaster 36,268,346 votes for Election as director until 2027 annual meeting

Key Terms

Annual Meeting of Stockholders, named executive officers, advisory basis, independent registered public accounting firm, +1 more

5 terms

Annual Meeting of Stockholders financial

"On June 25, 2026, Mammoth Energy Services, Inc. held its Annual Meeting of Stockholders"

named executive officers financial

"The Company’s stockholders approved, on an advisory basis, the compensation paid to the Company’s named executive officers"

Named executive officers are the senior company leaders whose names, roles and compensation are singled out in required regulatory filings; this typically includes the chief executive, chief financial officer and the next highest‑paid senior officers. Investors treat this list like a team roster — it shows who makes key decisions, how they are paid and whether incentives align with shareholder interests, so changes or pay patterns can signal governance quality, risk or strategic shifts.

advisory basis financial

"The Company’s stockholders approved, on an advisory basis, the compensation paid"

independent registered public accounting firm financial

"The appointment of Carr, Riggs & Ingram L.L.C. as the Company’s independent registered public accounting firm"

An independent registered public accounting firm is an outside accounting company officially registered with the government regulator to examine and report on a public company's financial records and controls. Investors treat its reports like an impartial inspector’s certificate — they add credibility to financial statements, help spot errors or misleading claims, and reduce the risk that shareholders are relying on unchecked or biased numbers.

broker non-votes financial

"including the number of votes cast for each matter and the number of votes cast against, abstentions, and broker non-votes"

Broker non-votes occur when a brokerage firm is unable to vote on a shareholder’s behalf during a company election or decision because the shareholder has not given specific voting instructions, and the broker is not allowed or chooses not to vote on certain matters. They are important because they can affect the outcome of votes, especially when the results are close, by effectively reducing the total number of votes cast.

FAQ

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

What did Mammoth Energy Services (TUSK) stockholders decide at the 2026 annual meeting?

Stockholders elected six directors for terms ending at the 2027 meeting, approved executive compensation on an advisory basis, chose annual say-on-pay votes, and ratified Carr, Riggs & Ingram L.L.C. as auditor for the year ending December 31, 2026.

Were Mammoth Energy Services (TUSK) directors re-elected at the 2026 annual meeting?

Yes. Six nominees — Arthur Amron, Corey Booker, Paul Jacobi, Phil Lancaster, James Palm and Mark Plaumann — were elected as directors, each to serve until the 2027 annual meeting and until a successor is elected and qualified or earlier departure.

How did Mammoth Energy Services (TUSK) stockholders vote on executive compensation?

Stockholders approved the compensation of named executive officers on an advisory basis, with 36,252,635 votes for, 264,334 against and 76,829 abstentions. There were 5,550,784 broker non-votes recorded on this say-on-pay proposal.

What frequency of say-on-pay votes did Mammoth Energy Services (TUSK) stockholders prefer?

Stockholders indicated a preference for annual advisory votes on executive compensation, with 35,911,762 votes for one year, 4,130 for two years, 641,206 for three years, and 36,700 abstentions, along with 5,550,784 broker non-votes on the frequency question.

Which accounting firm was ratified as Mammoth Energy Services (TUSK) auditor for 2026?

Carr, Riggs & Ingram L.L.C. was ratified as independent registered public accounting firm for the fiscal year ending December 31, 2026, receiving 42,054,219 votes for, 87,134 against, and 3,229 abstentions, with no broker non-votes reported on this proposal.

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

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Accepted by SEC EDGAR 06/26/2026 - 04:08 PM

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENT REPORT


PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): June 25, 2026

Mammoth Energy Services, Inc.

(Exact name of registrant as specified in its charter)

001-37917

(Commission File No.)

Delaware

32-0498321

(State or other jurisdiction of incorporation or organization)

(I.R.S. Employer Identification No.)

14201 Caliber Drive,

Suite 300

Oklahoma City,

Oklahoma

(405)

608-6007

73134

(Address of principal executive offices)

(Registrant’s telephone number, including area code)

(Zip Code)

______________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))


Securities registered pursuant to Section 12(b) of The Act:
Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	TUSK	The Nasdaq Stock Market LLC
		NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§232.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging Growth Company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(s) of the Exchange Act. ¨

Item 5.07. Submission of Matters to a Vote of Security Holders.

On June 25, 2026, Mammoth Energy Services, Inc. (the “Company”) held its Annual Meeting of Stockholders (the “Annual Meeting”). The Annual Meeting was held at 14201 Caliber Drive, Suite 300, Oklahoma City, Oklahoma. At the Annual Meeting, the Company’s stockholders voted on four proposals, a more detailed description of which is included in the Company’s definitive proxy statement filed with the Securities and Exchange Commission on May 15, 2026, and incorporated by reference in this report. The following is a brief description of each matter voted upon and the results of such voting, including the number of votes cast for each matter and the number of votes cast against, abstentions, and broker non-votes, if applicable, with respect to each matter.

Proposal 1

Arthur Amron, Corey Booker, Paul Jacobi, Phil Lancaster, James Palm and Mark Plaumann were elected to continue to serve as the Company’s directors until the 2027 Annual Meeting of Stockholders and until their respective successors are elected and qualified, or until their earlier death, resignation or removal. The results of the vote on Proposal 1 were as follows:


Name of Nominee	For	Against	Abstain	Non-Votes
Arthur Amron	35,060,078	1,519,819	13,901	5,550,784
Corey Booker	36,086,616	483,459	23,723	5,550,784
Paul Jacobi	36,167,165	413,462	13,171	5,550,784
Phil Lancaster	36,268,346	314,406	11,046	5,550,784
James Palm	33,638,074	2,944,525	11,199	5,550,784
Mark Plaumann	35,401,066	1,181,523	11,209	5,550,784

Proposal 2

The Company’s stockholders approved, on an advisory basis, the compensation paid to the Company’s named executive officers. The results of the vote on Proposal 2 were as follows:


For	Against	Abstain	Non-Votes
36,252,635	264,334	76,829	5,550,784

Proposal 3

The Company’s stockholders voted, on an advisory basis, in favor of holding a future advisory stockholder vote to approve the Company’s executive compensation on an annual basis. The results of the vote on Proposal 3 were as follows:


1 Year	2 Years	3 Years	Abstain	Non-Votes
35,911,762	4,130	641,206	36,700	5,550,784

Proposal 4

The appointment of Carr, Riggs & Ingram L.L.C. as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026 was ratified. The results of the vote on Proposal 4 were as follows:


For	Against	Abstain	Non-Votes
42,054,219	87,134	3,229	—

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

MAMMOTH ENERGY SERVICES, INC.

Date:

June 26, 2026

By:

/s/ Mark Layton

Mark Layton

Chief Financial Officer and Secretary

Source: View Original Filing on SEC EDGAR

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