tusk-20250307

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)


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).

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. ¨

On March 7, 2025, the Audit Committee of the Board of Directors (the “Audit Committee”) of Mammoth Energy Services, Inc. (the “Company”) approved the dismissal of Grant Thornton LLP (“Grant Thornton”) as the Company’s independent registered public accounting firm. The Company informed Grant Thornton of their dismissal on March 10, 2025.

During the Company’s two most recent fiscal years ended December 31, 2024 and December 31, 2023 and during the subsequent interim period from January 1, 2025 through March 7, 2025, (i) there were no disagreements with Grant Thornton on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedures that, if not resolved to Grant Thornton’s satisfaction, would have caused Grant Thornton to make reference to the subject matter of the disagreement in connection with its reports and (ii) there were no “reportable events” as defined in Item 304(a)(1)(v) of Regulation S-K.

The audit reports of Grant Thornton on the consolidated financial statements of the Company for each of the two most recent fiscal years ended December 31, 2024 and December 31, 2023 did not contain an adverse opinion or a disclaimer of opinion and were not qualified or modified as to uncertainty, audit scope or accounting principles.

In accordance with Item 304(a)(3) of Regulation S-K, the Company provided Grant Thornton with a copy of this Current Report on Form 8-K prior to its filing with the Securities and Exchange Commission (“SEC”) and requested that Grant Thornton furnish it with a letter addressed to the SEC stating whether it agrees with the above statements in this Item 4.01. A copy of Grant Thornton’s letter, dated March 11, 2025, is filed as Exhibit 16.1 to this Current Report on Form 8-K.

Also on March 7, 2025, the Audit Committee approved the engagement of Deloitte & Touche LLP (“Deloitte”) as its new independent registered public accounting firm. Deloitte’s appointment will be for the Company’s fiscal year ending December 31, 2025, and related interim periods.

During the Company’s two most recent fiscal years ended December 31, 2024 and December 31, 2023, and for the subsequent interim period through March 7, 2025, neither the Company nor anyone on its behalf consulted Deloitte regarding (i) the application of accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on the consolidated financial statements of the Company, in connection with which neither a written report nor oral advice was provided to the Company that Deloitte concluded was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issue; or (ii) any matter that was either the subject of a disagreement as defined in Item 304(a)(1)(iv) of Regulation S-K or a reportable event as described in Item 304(a)(1)(v) of Regulation S-K.


Exhibit Number			Description
16.1			Letter of Grant Thornton LLP dated March 11, 2025.
104			Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

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.


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