THE HACKETT GROUP, INC.

The Hackett Group, Inc. is a Nasdaq-listed public company. As of the record date for its 2026 annual meeting (March 13, 2026), it had approximately 25,220,226 shares of common stock issued and outstanding, per its Schedule 14A proxy statement filed with the SEC on March 20, 2026. As a US-listed issuer, only investors beneficially owning 5% or more of its outstanding stock are required to publicly disclose their holdings, through Schedule 13D or 13G filings with the SEC. Shareholder disclosure for this company is therefore best described as major shareholders only, not a complete shareholder register.

The most recently confirmed 5%-plus holder is Royce & Associates, LP, which reported beneficial ownership of 2,962,097 shares, or 11.67% of the outstanding class, as of February 28, 2026, in a Schedule 13G/A (Amendment No. 5) filed with the SEC on March 3, 2026. Separately, Vanguard Group Inc reported 0% beneficial ownership at the parent-entity level as of March 13, 2026, in a Schedule 13G/A (Amendment No. 6) filed March 27, 2026, attributing this to an internal realignment effective January 12, 2026 under which certain affiliated Vanguard funds began reporting their holdings individually rather than through the parent entity. Because of this reporting change, a current aggregate ownership percentage attributable to Vanguard-affiliated funds as a group could not be independently confirmed from the parent filing at the time of research, and any higher aggregate figure attributed to Vanguard Group Inc from other data sources should be treated with caution pending the underlying funds’ own individual filings.

No individual has been identified in verified sources as an ultimate beneficial owner of The Hackett Group, Inc. Its shares are broadly held by public investors and institutional asset managers, and the beneficial-ownership disclosures located are at the level of investment funds and managers rather than named natural persons, so no UBO conclusion can be drawn from the available filings.

Overall, shareholder disclosure for The Hackett Group, Inc. is major shareholders only, current as of the dates noted above for each source; smaller and retail holdings below the SEC’s 5% reporting threshold are not itemized in public filings.

The Hackett Group, Inc.’s most recent proxy statement (Schedule 14A, filed with the SEC on March 20, 2026, ahead of its April 30, 2026 annual meeting) identifies Ted A. Fernandez as Chairman and Chief Executive Officer, a role he has held since founding the company in 1997, and David N. Dungan as Vice Chairman and Chief Operating Officer, a co-founder and director since 2000. Robert A. Ramirez has served as Executive Vice President of Finance and Chief Financial Officer since August 2007. Company registry records additionally list Frank A. Zomerfeld as the company’s Secretary; his appointment date is not disclosed in the available registry data, and his role is also associated in company materials with the General Counsel function.

None of the reviewed sources disclose the nationality of Mr. Fernandez, Mr. Dungan, Mr. Ramirez or Mr. Zomerfeld. Nationality is treated here as a separate data point from country of residence or correspondence address, and it is not published by the Florida Division of Corporations or in the SEC filings reviewed for this profile. The corporate address on file for these officers, 1001 Brickell Bay Drive, Suite 3000, Miami, Florida, is the company’s correspondence address rather than a personal or residential address, and it is not used here to infer nationality or country of residence.

Officer information for The Hackett Group, Inc. is best described as partial: company registry data references additional historical officer filings beyond the individuals named above, and only the current snapshot was reviewed for this profile. No verified resignation, removal or new-appointment dates were identified for the officers named here during the period covered by the sources reviewed, so no recent officer changes are reported.

The Hackett Group, Inc. is a publicly traded company listed on the Nasdaq Global Market and, based on the sources reviewed, is not itself a subsidiary of another company; no immediate or ultimate parent was identified. It is the SEC registrant and top-level reporting entity for its consolidated group.

Exhibit 21.1 to its Form 10-K for the fiscal year ended December 26, 2025, filed with the SEC on February 27, 2026, lists the company’s subsidiaries as of that date, spanning Australia, Canada, France, Germany, India, the Netherlands, Singapore, Spain, Switzerland, the United Kingdom and Uruguay, in addition to several Delaware- and Florida-incorporated US entities. This SEC exhibit does not state ownership percentages or distinguish direct from indirect holdings, so the relationships below are presented simply as subsidiaries of The Hackett Group, Inc.

Registration numbers shown above, where present, come from the company’s linked corporate-registry data rather than from the SEC exhibit itself, which lists entity names and jurisdictions only. Separately, that linked registry data references a broader set of related entities, including Hackett-Rel Limited, REL Consultancy Group Limited, Resource Evaluation Limited, Spend Matters, LLC, Archstone Consulting LLC, Technolab International, Corp., Infinity Consulting Group LLC, Hackett Benchmarking, Think New Ideas, Inc., Jibe Consulting and a generically named Hackett Group entity, that could not be matched to the FY2025 SEC subsidiary exhibit. These may represent renamed, historical, dissolved or otherwise superseded entities from the company’s past acquisitions and are not presented above as current verified relationships.

In September 2024, The Hackett Group, Inc. announced the acquisition of the Gen AI engineering and agentic-orchestration business of India-based LeewayHertz, adding the ZBrain platform and LeewayHertz Technologies Private Limited to the group; this addition is reflected in the FY2025 Exhibit 21.1 subsidiary list referenced above.

Overall, corporate-linkage disclosure for The Hackett Group, Inc. is limited to its verified subsidiaries: the SEC-filed exhibit is current as of February 27, 2026 and confirms the company has no parent, but it does not disclose ownership percentages or incorporation dates for each subsidiary.