Vertiv Holdings Co

Disclosure Controls and Procedures

The Company maintains (a) disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act), and (b) internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act).

The Company’s management, with the participation of its Chief Executive Officer and its Chief Financial Officer, conducted an evaluation of the effectiveness of the Company’s disclosure controls and procedures as of June 30, 2026 (the end of the period covered by this Quarterly Report on Form 10-Q). Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that, as of June 30, 2026, the Company’s disclosure controls and procedures were effective in ensuring that material information for the Company, including its consolidated subsidiaries, required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that it is accumulated and communicated to management, including our principal executive and financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There have not been any changes in our internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the quarter ended June 30, 2026, that have materially affected, or are reasonably likely to materially affect, internal control over financial reporting.

The Company completed the acquisition of Great Lakes as of August 20, 2025, PurgeRite as of December 4, 2025, BMarko Structures, LLC as of April 10, 2026, Strategic Thermal Labs, LLC as of April 24, 2026, and ThermoKey S.p.A as of June 11, 2026. As such: Great Lakes; PurgeRite; BMarko Structures, LLC; Stategic Thermal Labs, LLC; and ThermoKey S.p.A.; respectively, have been excluded from the Company's assessment of internal control over financial reporting. Companies are permitted to exclude acquisitions from their assessment of internal control over financial reporting during the first year of an acquisition while integrating the acquired company under guidelines established by the Securities and Exchange Commission.