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): November 9, 2025

NINE ENERGY SERVICE, INC.

(Exact name of registrant as specified in its charter)

Delaware

001-38347

80-0759121

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

2001 Kirby Drive, Suite 200

Houston, Texas

77019

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (281) 730-5100

Not Applicable

(Former name or former address, if changed since last report)

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, par value $0.01 per share

NINE

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 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(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On November 9, 2025, Richard A. Burnett notified Nine Energy Service, Inc. (the “Company”) of his decision to resign from the board of directors of the Company (the “Board”), effective as of the end of such date. Mr. Burnett’s decision to resign from the Board was not due to any disagreement with the Company on any matter relating to the Company’s operations, policies or practices.

In connection with Mr. Burnett’s resignation, the size of the Board has been reduced from six members to five members, effective as of November 10, 2025. In addition, Scott E. Schwinger, the Chairman of the Board, has been appointed as a member and as the Chair of the Board’s Audit Committee, effective as of November 10, 2025, to replace Mr. Burnett.

SIGNATURES

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 hereunto duly authorized.

Dated: November 13, 2025

NINE ENERGY SERVICE, INC.

/s/ Theodore R. Moore

Theodore R. Moore

Executive Vice President, General Counsel and Secretary

Nine Energy Service, Inc. 8-K