TUSK

EX-99.1

2 a2026-03x31exx991.htm

EX-99.1

Document

Exhibit 99.1

Mammoth Energy Services, Inc. Announces

First Quarter 2026 Operational and Financial Results

OKLAHOMA CITY, OK – May 11, 2026 – Mammoth Energy Services, Inc. (NASDAQ: TUSK) (“Mammoth” or the “Company”) today reported financial and operational results for the first quarter ended March 31, 2026.

Mark Layton, Chief Financial Officer of Mammoth commented, “The first quarter is a meaningful step forward for Mammoth and reflects the work we've been doing over the past several quarters to reposition the business. We've simplified the portfolio, allocated capital towards high returns businesses, and taken meaningful cost out of the structure — and we're starting to see that come through in the results.

Aviation continues to perform well and is providing a more stable earnings base, and across the rest of the platform we're seeing clear signs of improvement as the operational changes we made coming out of the fourth quarter begin to take hold.

Our balance sheet remains a real point of strength. We ended the quarter debt-free with approximately $125 million of cash, cash equivalents and marketable securities, which gives us flexibility both to invest in the business and return capital to shareholders. During the quarter, we began executing on our share repurchase program for the first time since it was authorized, and we expect to remain opportunistic going forward.

Based on the progress we're seeing, we are raising our 2026 outlook, including now expecting to reach full-year Adjusted EBITDA positive in 2026. There's still work to do, but the business is moving in the right direction and we're focused on continuing to execute.”

Financial Overview for the First Quarter 2026:

Total revenue from continuing operations was $22.0 million for the first quarter of 2026 compared to $11.6 million for the first quarter of 2025 and $9.5 million for the fourth quarter of 2025.

Net income from continuing operations for the first quarter of 2026 was $4.7 million, or $0.10 per diluted share, compared to net loss from continuing operations of $2.2 million, or $0.05 per diluted share, for the first quarter of 2025 and $12.3 million, or $0.26 per diluted share, for the fourth quarter of 2025.

Adjusted EBITDA from continuing operations ("Adjusted EBITDA" as defined and reconciled in the tables below) was $1.9 million for the first quarter of 2026, compared to ($2.3) million for the first quarter of 2025 and ($6.8) million for the fourth quarter of 2025.

Rental Services and Aviation Sales

Mammoth’s rental services segment contributed revenue (inclusive of inter-segment revenue) of $13.0 million for the first quarter of 2026 compared to $1.9 million for the first quarter of 2025 and $3.3 million for the fourth quarter of 2025. The increase in revenue was primarily driven by a $10.0 million increase in aviation revenue, which included the sale of an auxiliary power unit for $6.5 million. The average number of pieces of equipment rented to customers was 389 for the first quarter of 2026 compared to 231 during the first quarter of 2025 and 328 during the fourth quarter of 2025.

Infrastructure Services

Mammoth’s infrastructure services segment contributed revenue of $0.3 million for the first quarter of 2026 compared to $0.7 million for the first quarter of 2025 and $1.2 million for the fourth quarter of 2025.

Natural Sand Proppant Services

Mammoth’s natural sand proppant services segment contributed revenue of $3.9 million for the first quarter of 2026 compared to $6.7 million for the first quarter of 2025 and $1.7 million for the fourth quarter of 2025. In the first quarter of 2026, the Company sold approximately 156,000 tons of sand at an average sales price of $19.49 per ton compared to sales of approximately 189,000 tons of sand at an average sales price of $21.49 per ton during the first quarter of 2025. Average price per ton of sand sold decreased primarily due to a shift of grade mix. In the fourth quarter of 2025, sales were approximately 92,000 tons of sand at an average price of $18.56 per ton.

Accommodation Services

Mammoth’s accommodation services segment contributed revenue of $3.5 million for the first quarter of 2026 compared to $2.1 million for the first quarter of 2025 and $2.8 million for the fourth quarter of 2025. On average, 275 rooms were utilized for the first quarter of 2026 compared to 179 during the first quarter of 2025 and 232 during the fourth quarter of 2025 for our accommodations services.

Drilling Services

Mammoth’s drilling services segment contributed revenue of $1.4 million for the first quarter of 2026 compared to $0.2 million for the first quarter of 2025 and $0.5 million for the fourth quarter of 2025.

Selling, General and Administrative Expense

Selling, general and administrative (“SG&A”) expense was $3.6 million for the first quarter of 2026 compared to $4.1 million for the first quarter of 2025 and $5.7 million for

tusk-202603060001679268FALSE00016792682026-03-062026-03-06

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): March 6, 2026

Mammoth Energy Services, Inc.

(Exact name of registrant as specified in its charter)

001-37917 (Commission File No.)

Delaware32-0498321 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

14201 Caliber Drive,Suite 300 Oklahoma City,Oklahoma(405)608-600773134 (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 classTrading Symbol(s)Name of each exchange on which registered Common StockTUSKThe 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 2.02 Results of Operations and Financial Condition

On March 6, 2026, Mammoth Energy Services, Inc. (the “Company”) issued a press release announcing its operational and financial results for the fourth quarter and full year ended December 31, 2025. A copy of that press release is furnished as Exhibit 99.1 to this report.

The information in this Item 2.02, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and will not be incorporated by reference into any registration statement filed under the Securities Act of 1933, as amended, unless specifically identified as being incorporated by reference in the registration statement.

Item 9.01 Financial Statements and Exhibits.

(d)    Exhibits.

99.1 Press release dated March 6, 2026, entitled “Mammoth Energy Services, Inc. Announces Fourth Quarter and Full Year 2025 Operational and Financial Results.”

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

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:March 6, 2026By:/s/ Mark Layton Mark Layton Chief Financial Officer and Secretary

tusk-202510310001679268FALSE00016792682025-08-082025-08-08

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): October 31, 2025

Mammoth Energy Services, Inc.

(Exact name of registrant as specified in its charter)

001-37917 (Commission File No.)

Delaware32-0498321 (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)

14201 Caliber Drive,Suite 300 Oklahoma City,Oklahoma(405)608-600773134 (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 classTrading Symbol(s)Name of each exchange on which registered Common StockTUSKThe 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 2.02 Results of Operations and Financial Condition

On October 31, 2025, Mammoth Energy Services, Inc. (the “Company”) issued a press release announcing its operational and financial results for the third quarter ended September 30, 2025. A copy of that press release is furnished as Exhibit 99.1 to this report.

The information in this Item 2.02, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and will not be incorporated by reference into any registration statement filed under the Securities Act of 1933, as amended, unless specifically identified as being incorporated by reference in the registration statement.

Item 9.01 Financial Statements and Exhibits.

(d)    Exhibits.

99.1 Press release dated October 31, 2025, entitled “Mammoth Energy Services, Inc. Announces Third Quarter 2025 Operational and Financial Results.”

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

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:October 31, 2025By:/s/ Mark Layton Mark Layton Chief Financial Officer and Secretary