Nine Energy CFO to resign; interim successor named

Nine Energy Service reports that Executive Vice President and Chief Financial Officer Guy Sirkes has decided to resign to accept a role at another company, with his resignation effective May 11, 2026.

Rhea-AI Filing Summary

Nine Energy Service reports that Executive Vice President and Chief Financial Officer Guy Sirkes has decided to resign to accept a role at another company, with his resignation effective May 11, 2026.

On the same date, Heather Schmidt, age 42, will be appointed Interim Chief Financial Officer unless a permanent CFO is named earlier. Schmidt joined the company in 2012 and currently leads strategic development, M&A, investor relations, marketing and public relations. She will receive an indemnification agreement in the same form used for other executive officers. The company states there are no family relationships or related-party transactions requiring disclosure in connection with her appointment.

Insights

Corporate governance analyst

Nine Energy replaces departing CFO with experienced internal executive on an interim basis.

Nine Energy Service discloses the planned resignation of CFO Guy Sirkes, effective May 11, 2026, as he leaves for another company. To maintain continuity, the board plans to appoint long-serving executive Heather Schmidt as Interim CFO on the same date, absent an earlier permanent hire.

Schmidt has been with the company since 2012 and currently oversees strategic development, M&A, investor relations, marketing and public relations, which suggests broad familiarity with the business and capital markets communication. Her appointment is supported by a standard officer indemnification agreement, consistent with other executives.

The filing notes no family relationships or related-party transactions tied to Schmidt’s new role, which helps address potential governance concerns. Future disclosures in company filings may provide additional detail if a permanent CFO is appointed or if Schmidt’s compensation or responsibilities change materially.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

Key Figures

CFO resignation effective date: May 11, 2026 Interim CFO appointment date: May 11, 2026 Heather Schmidt age: 42 years +3 more

6 metrics

CFO resignation effective date May 11, 2026 Effective date of Guy Sirkes’ resignation

Interim CFO appointment date May 11, 2026 Planned appointment date for Heather Schmidt as Interim CFO

Heather Schmidt age 42 years Age of incoming Interim CFO

Service start year 2012 Year Heather Schmidt joined Nine Energy Service

SVP role start November 2024 Start of Schmidt’s role as Senior Vice President of Strategic Development and Investor Relations

Prior VP role period 2020 to February 2025 Period Schmidt served as Vice President, Strategic Development, Investor Relations and Marketing

Key Terms

Interim Chief Financial Officer, indemnification agreement, Item 5.02, Regulation S-K, +1 more

5 terms

Interim Chief Financial Officer financial

"On May 11, 2026, Heather Schmidt will be appointed as the Company’s Interim Chief Financial Officer"

An interim chief financial officer is a temporary leader responsible for managing a company's financial activities, such as budgeting, financial planning, and reporting, during a transitional period. Think of it as filling in for a key manager until a permanent replacement is found. For investors, this role is important because it ensures financial stability and clear guidance during times of change or uncertainty.

indemnification agreement regulatory

"she will enter into an indemnification agreement with the Company in the same form"

An indemnification agreement is a contract in which one party promises to cover losses, costs, or legal claims that another party might face, acting like a tailored safety net or private insurance policy. For investors, it matters because such agreements shift potential financial risk away from a company or its officers and onto the indemnifier, which can affect a company’s future liabilities, cash flow and how risky the investment appears during deal-making or litigation.

Item 5.02 regulatory

"Item 5.02 Departure of Directors or Certain Officers; Election of Directors"

Regulation S-K regulatory

"transactions between the Company and Ms. Schmidt that would require disclosure under Item 404(a) of Regulation S-K"

A set of U.S. Securities and Exchange Commission rules that tell public companies which narrative and qualitative details must be disclosed in filings, such as risk factors, management discussion, executive pay, legal proceedings and business description. Think of it as a standardized checklist or blueprint that ensures investors get the same types of background information from every company so they can compare risks, management quality and strategy before making investment decisions.

Emerging growth company regulatory

"Emerging growth company"

An emerging growth company is a recently public or smaller public firm that qualifies for temporary, lighter regulatory and disclosure rules to reduce the cost and effort of being public. For investors, it means the company may provide less historical financial detail and face fewer reporting requirements than larger firms, so it can grow more quickly but also carries higher uncertainty—like buying a promising early-stage product with fewer user reviews.

FAQ

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

Why is Nine Energy Service (NINE) changing its Chief Financial Officer?

Nine Energy Service’s Executive Vice President and Chief Financial Officer, Guy Sirkes, chose to resign to accept a position at another company. The filing frames this as a career move rather than a dispute, and sets his resignation effective date as May 11, 2026.

When does Nine Energy Service’s CFO resignation become effective?

The resignation of Nine Energy Service’s CFO Guy Sirkes becomes effective on May 11, 2026. Until that date he continues in his role, and on that same day the company plans to appoint an Interim Chief Financial Officer to ensure leadership continuity.

Who will serve as Interim CFO at Nine Energy Service (NINE)?

Nine Energy Service plans to appoint Heather Schmidt as Interim Chief Financial Officer on May 11, 2026, unless a permanent CFO is named earlier. Schmidt joined in 2012 and leads strategic development, M&A, investor relations, marketing and public relations for the company.

What is Heather Schmidt’s background before becoming Interim CFO at NINE?

Before her planned Interim CFO role, Heather Schmidt served as Senior Vice President of Strategic Development and Investor Relations since November 2024. She previously worked at private equity firm SCF Partners, in political fundraising and for an NBA team, and holds degrees from Columbia University and Rice University.

Will Heather Schmidt receive a new indemnification agreement at Nine Energy Service?

Yes. In connection with her appointment as Interim CFO, Heather Schmidt will enter into an indemnification agreement in the same form used with other executive officers. It commits the company to indemnify and defend her against losses arising from her service, subject to stated terms and conditions.

Are there related-party or family relationships disclosed for Heather Schmidt at NINE?

The company states there are no family relationships between Heather Schmidt and any director or executive officer. It also reports no transactions with her that would require disclosure under Item 404(a) of Regulation S-K, addressing potential related-party concerns around her appointment.

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

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Accepted by SEC EDGAR 04/24/2026 - 04:05 PM Learn about SEC filing dates

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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): April 20, 2026

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		NYSE American

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 April 20, 2026, Guy Sirkes notified Nine Energy Service, Inc. (the “Company”) of his decision to resign from his role as Executive Vice President and Chief Financial Officer of the Company in order to accept a position at another company. The Company and Mr. Sirkes agreed his resignation would be effective as of May 11, 2026.

On May 11, 2026, Heather Schmidt will be appointed as the Company’s Interim Chief Financial Officer, unless a permanent Chief Financial Officer is appointed on or prior to such date. Ms. Schmidt, age 42, joined the Company in 2012 and is responsible for the Company’s strategic development, M&A and communications with investors and the marketplace as well as marketing and public relations. Since November 2024, she has served as the Company’s Senior Vice President of Strategic Development and Investor Relations, and prior to that, from 2020 to February 2025, she served as the Company’s Vice President, Strategic Development, Investor Relations and Marketing. Before joining the Company, Ms. Schmidt was with SCF Partners, a private equity firm that invests in energy services, products and technology companies globally. Ms. Schmidt’s strong and diverse background also includes fundraising and donor relations for a national political campaign and marketing for an NBA team. Ms. Schmidt received a Bachelor’s degree from Columbia University and an MBA from Rice University.

In connection with Ms. Schmidt’s appointment as Interim Chief Financial Officer, she will enter into an indemnification agreement with the Company in the same form that the Company has entered into with its other executive officers, pursuant to which the Company has agreed to indemnify, defend and hold its officers harmless from and against losses and expenses incurred as a result of their service to the Company, subject to the terms and conditions provided in the agreement. The foregoing summary of the indemnification agreement does not purport to be complete and is qualified in its entirety by reference to the form of indemnification agreement, which is filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 and which is incorporated herein by reference.

There are no family relationships between Ms. Schmidt and any director or executive officer of the Company, and there are no transactions between the Company and Ms. Schmidt that would require disclosure under Item 404(a) of Regulation S-K.

1

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: April 24, 2026	NINE ENERGY SERVICE, INC.
	By:	/s/ Ann G. Fox
		Ann G. Fox
		President, Chief Executive Officer, Secretary and Director

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Filing Exhibits & Attachments

3 documents

Other Documents

• EX-101 XBRL LABEL FILE 33.4 KB
• EX-101 XBRL PRESENTATION FILE 21.9 KB
• EX-101 XBRL SCHEMA FILE 3.0 KB