HALLIBURTON COMPANY

Halliburton Company’s shareholder register, compiled from institutional ownership data and verified as of 4 September 2026, lists five major shareholders among a total of seven currently on record. As a company listed on the New York Stock Exchange, this reflects only the largest institutional holdings identified through reportable ownership data rather than Halliburton Company’s complete shareholder base, which also includes a large number of individual and smaller institutional investors whose holdings fall below public disclosure thresholds. This information should be read as major shareholders only.

Vanguard Group Inc is the largest disclosed shareholder, holding approximately 15.4% of Halliburton Company’s ordinary shares (around 101.0 million shares). The Growth Fund of America holds approximately 5.8% (around 37.7 million shares), and the Capital Group Dividend Value ETF holds approximately 3.0% (around 19.4 million shares). Two further index funds are recorded with smaller holdings: the Vanguard Mid-Cap Index Fund at approximately 2.6% and the Fidelity 500 Index Fund at approximately 1.6%. All disclosed shareholders are investment funds or asset managers rather than individuals, and the interests recorded are direct holdings of ordinary shares rather than derivative or indirect positions. Share classes beyond ordinary shares are not indicated in the available data.

No ultimate beneficial owner can be identified from this shareholder register. Because every disclosed shareholder is itself a fund or asset-management company rather than a natural person, establishing a beneficial owner would require tracing ownership through each holding entity, which is not possible from the information available here. This is a normal feature of ownership disclosure for a large, publicly traded company with a widely dispersed shareholder base, rather than evidence that no ultimate beneficial owner exists.

Data availability: shareholder information for Halliburton Company is classed as major shareholders only, current as of 4 September 2026. Sources: Zavia registry shareholder data (retrieved 9 September 2026).

Halliburton Company’s officer record with the Texas Secretary of State lists 16 officers in total, of which the five highest-ranking entries retrieved for this profile are recorded with an active work status as of the registry’s last update on 9 September 2026: the President, CEO & Chairman; the Presidents of the Western and Eastern Hemisphere operating regions; the Senior Vice President & Chief Accounting Officer; and the Senior Vice President of Tax. The Texas filing does not disclose appointment or resignation dates, nor does it disclose the nationality of any officer. The “United States” field recorded against each officer is a correspondence-address country rather than a statement of nationality or country of residence, and neither should be inferred from it.

Jeffrey (Jeff) Miller is confirmed, via Halliburton Company’s official corporate-governance page (retrieved September 2026), as Chairman, President and Chief Executive Officer, consistent with the Texas filing. Several other roles recorded in the Texas filing no longer match Halliburton Company’s current leadership as shown on its official website, reflecting the fact that state officer filings are updated periodically rather than in real time.

Recent officer changes verified through official Halliburton Company announcements:

Effective 1 February 2026, Halliburton Company appointed Michael Casey Maxwell as President, Western Hemisphere, succeeding Mark J. Richard, who moved to the role of senior advisor to the Chairman, President and Chief Executive Officer; the appointment was announced on 13 January 2026.

Effective 1 January 2026, Halliburton Company’s board appointed Rami Yassine as President, Eastern Hemisphere, succeeding Shannon Slocum, who was concurrently named Executive Vice President and Chief Operating Officer; this change was announced on 3 December 2025.

Effective 16 July 2025, Stephanie Holzhauser became Senior Vice President and Chief Accounting Officer, succeeding Charles E. Geer Jr., who departed for an executive role at another company.

Data availability: officer information filed with the Texas Secretary of State may lag behind current appointments, as illustrated by the changes above; nationality is not disclosed in either the Texas filing or Halliburton Company’s public officer listing. Sources: Texas Secretary of State — SOSDirect (registry sync 9 September 2026); Halliburton Company official corporate-governance page and press releases (retrieved September 2026).

Halliburton Company is a publicly traded parent company rather than a subsidiary of another entity. Its shares trade on the New York Stock Exchange, and — consistent with the shareholder information above — no single corporate or individual owner controls it; its shares are held by a wide base of institutional and individual investors. No immediate or ultimate parent of Halliburton Company was identified in any official source reviewed for this profile.

Halliburton Company operates a group of subsidiaries across more than 70 countries, consistent with the international scope described in its Form 10-K for the year ended 31 December 2025, filed with the U.S. Securities and Exchange Commission on 6 February 2026. Exhibit 21.1 to that filing lists 15 subsidiaries that Halliburton Company treats as significant for SEC disclosure purposes; the filing does not specify whether each is held directly or through an intermediate holding company. Zavia’s broader corporate-linkage data references a substantially larger number of related entities across many additional jurisdictions, reflecting the scale of a global oilfield-services group, though those additional entries have not been independently verified against an official filing for this summary.

Halliburton Operations Finance Company, LLC also functions as a co-borrower with Halliburton Company under a US$3.5 billion five-year revolving credit agreement entered into on 18 August 2025, confirming an active financing relationship between the two entities beyond its inclusion in the subsidiary list.

Data availability: the corporate-structure information for Halliburton Company is partial. The SEC filing confirms only the subsidiaries Halliburton Company treats as significant for disclosure purposes, not a complete list of every direct and indirect subsidiary in the group, and ownership percentages within the group are not disclosed in the reviewed sources. Sources: Halliburton Company Form 10-K for fiscal year 2025, Exhibit 21.1, filed with the SEC on 6 February 2026 (retrieved September 2026).