# EDGAR Filing Document

**Accession Number:** 0001679268
**File Stem:** 0001628280-26-045745
**Filing Date:** 2026-6
**Character Count:** 7183
**Document Hash:** 66962fc51e16f0e3c26475bf49cba2a1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-045745.hdr.sgml**: 20260626

**ACCESSION NUMBER**: 0001628280-26-045745

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260625

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260626

**DATE AS OF CHANGE**: 20260626

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MAMMOTH ENERGY SERVICES, INC.
- **CENTRAL INDEX KEY:** 0001679268
- **STANDARD INDUSTRIAL CLASSIFICATION:** OIL, GAS FIELD SERVICES, NBC [1389]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 320498321
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37917
- **FILM NUMBER:** 261129267

**BUSINESS ADDRESS:**
- **STREET 1:** 14201 CALIBER DRIVE
- **STREET 2:** SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134
- **BUSINESS PHONE:** 405-608-6007

**MAIL ADDRESS:**
- **STREET 1:** 14201 CALIBER DRIVE
- **STREET 2:** SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Mammoth Energy Services, Inc.
- **DATE OF NAME CHANGE:** 20160708

?xml version='1.0' encoding='ASCII'? tusk-20260625

**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.)**

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| | | | | |
|:---|:---|:---|:---|:---|
| **Delaware** | **Delaware** | | | **32-0498321** |
| (State or other jurisdiction of incorporation or organization) | (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) | (Address of principal executive offices) | (Registrant's telephone number, including area code) | (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:** | **Securities registered pursuant to Section 12(b) of The Act:** | **Securities registered pursuant to Section 12(b) of The Act:** |
| **<u>Title of each class</u>** | **<u>Trading Symbol(s)</u>** | **<u>Name of each exchange on which registered</u>** |
| 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. ◻

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**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 | 35060078 | 1519819 | 13901 | 5550784 |
| Corey Booker | 36086616 | 483459 | 23723 | 5550784 |
| Paul Jacobi | 36167165 | 413462 | 13171 | 5550784 |
| Phil Lancaster | 36268346 | 314406 | 11046 | 5550784 |
| James Palm | 33638074 | 2944525 | 11199 | 5550784 |
| Mark Plaumann | 35401066 | 1181523 | 11209 | 5550784 |

---

**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:

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| | | | | |
|:---|:---|:---|:---|:---|
| **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.

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| | | | |
|:---|:---|:---|:---|
| | | | **MAMMOTH ENERGY SERVICES, INC.** |
| Date: | June 26, 2026 | By: | /s/ Mark Layton |
|  |  |  | Mark Layton |
|  |  |  | *Chief Financial Officer and Secretary* |

---