NINE ENERGY SERVICE, INC.

Current ownership disclosure for Nine Energy Service, Inc. is drawn from its U.S. Securities and Exchange Commission filings rather than solely from the state registry, because the company’s entire pre-existing common stock was cancelled as part of its Chapter 11 restructuring and replaced with newly issued shares on emergence on 5 March 2026. Based on a beneficial-ownership table in the company’s Form 10-K/A, as of 20 April 2026 Nine Energy Service, Inc. had 13,949,990 shares of common stock outstanding, with four holders reported above the 5% disclosure threshold: Philosophy Capital Management LLC (2,551,128 shares, 18.3%), MacKay Shields LLC (1,662,134 shares, 11.9%), NYLI MacKay High Yield Corporate Bond Fund (1,404,300 shares, 10.1%), and CastleKnight Master Fund LP (1,157,943 shares, 8.3%). Philosophy Capital Management LLC and MacKay Shields LLC have each entered into voting agreements capping their effective voting power at 10% of total voting power, with excess votes allocated proportionally among other shareholders.

No individual has been identified as an ultimate beneficial owner of Nine Energy Service, Inc. All reported holders above the 5% threshold are institutional investment managers or investment funds rather than natural persons, and no complete ownership chain to a natural person is available from the sources reviewed.

Disclosure is major-shareholders-only: the SEC filing itemises only holders above the 5% threshold, so smaller shareholdings are not listed. The company’s registry record separately lists UBS Group AG and Vanguard Group Inc as shareholders with small stated percentages, verified as of early September 2026; however, this data corresponds to the company’s pre-restructuring share class, which was cancelled on 5 March 2026, and does not reflect current ownership.

Sources: Nine Energy Service, Inc. Form 10-K/A, filed with the U.S. Securities and Exchange Commission; Texas Secretary of State company registry record. Retrieved September 2026.

Nine Energy Service, Inc.’s board and executive leadership were substantially reconstituted in 2026 alongside its Chapter 11 restructuring. Ann G. Fox has served as President and Chief Executive Officer, and as a director, since July 2015. Following the company’s emergence from Chapter 11 on 5 March 2026, the board was reconstituted with J. Carney Hawks joining as Chairman and Patrick J. Bartels and Alexander Esslemont joining as directors; Jerome D. Hall has served as a director since August 2025, and Darryl K. Willis since August 2018.

Other executive officers reported for fiscal year 2025 include David Crombie, Executive Vice President and Chief Operating Officer; Theodore R. Moore, Executive Vice President and General Counsel; and S. Brett Luz, Senior Vice President and Chief Accounting Officer, a role held since November 2024. Guy Sirkes served as Executive Vice President and Chief Financial Officer during 2025. Heather Schmidt was appointed interim Chief Financial Officer effective 11 May 2026 and confirmed as permanent Chief Financial Officer effective 22 May 2026, succeeding Sirkes in that role.

Nationality is not officially disclosed for any of Nine Energy Service, Inc.’s directors or officers in either the Texas state registry or the company’s SEC filings. One officer record lists a Netherlands address; this is a correspondence address only and does not indicate that officer’s nationality or country of residence, neither of which is disclosed.

Recent officer changes: Heather Schmidt was appointed permanent Chief Financial Officer effective 22 May 2026, after serving as interim Chief Financial Officer from 11 May 2026, per the company’s Form 8-K. Separately, the board was reconstituted effective with the company’s Chapter 11 emergence on 5 March 2026, with Hawks, Bartels and Esslemont added as directors under the confirmed reorganization plan, per the company’s Form 10-K/A.

Officer and director information is drawn from the Texas Secretary of State company registry, which provides current filings but not historical appointment or resignation dates or nationality, together with the company’s SEC filings, which disclose named executive officers, directors and appointment dates but likewise do not disclose nationality.

Nine Energy Service, Inc. is an independent, publicly traded company. No parent company has been identified for it in official filings, and following its 2026 financial restructuring its shares are held by a mix of institutional investors, none of which is disclosed as a controlling shareholder. The Texas Secretary of State registry record for Nine Energy Service, Inc. likewise records no parent, subsidiary or ownership linkage.

Nine Energy Service, Inc.’s own Form 10-K for the fiscal year ended 31 December 2025, filed with the U.S. Securities and Exchange Commission, names eleven subsidiaries in its Exhibit 21.1: CDK Perforating, LLC (Texas); Crest Pumping Technologies, LLC (Delaware); Frac Technology AS (Norway); Magnum Oil Tools GP, LLC (Texas); Magnum Oil Tools International, LTD (Texas); MOTI Holdco, LLC (Delaware); Nine Downhole Norway AS (Norway); Nine Downhole Technologies, LLC (Delaware); Nine Energy Canada Inc. (Alberta, Canada); Nine Energy Service, LLC (Delaware); and RedZone Coil Tubing, LLC (Texas). The filing does not specify which of these are held directly by Nine Energy Service, Inc. and which are held indirectly (for example, through MOTI Holdco, LLC), nor does it disclose ownership percentages for any of them.

The group’s confirmed subsidiaries span three countries: the United States (Delaware and Texas), Norway, and Canada (Alberta), consistent with the company’s North American and international completion-services operations. This subsidiary information is drawn from a filing effective for the period ended 31 December 2025; the bankruptcy-court-confirmed reorganization completed in March 2026 changed the company’s equity ownership, but no source reviewed indicates that it altered the underlying subsidiary structure.

Subsidiary information for Nine Energy Service, Inc. is available and reasonably complete for its U.S., Norwegian and Canadian operating subsidiaries as named in SEC filings, but ownership percentages and direct/indirect tiering are not disclosed. No parent company was identified because none appears to exist for this independently held, publicly traded company.

Sources: Nine Energy Service, Inc. Form 10-K, Exhibit 21.1, filed with the U.S. Securities and Exchange Commission; Texas Secretary of State company registry record. Retrieved September 2026.