Vertiv Holdings Co

During the fiscal quarter covered by this Quarterly Report on Form 10-Q, Robin Washington, a member of the Company'sboard of directors adopted a "Rule 10b5-1 trading arrangement" as such each term is defined in Item 408(a) of Regulation S-K. The Rule 10b5-1 trading arrangement, adopted by Ms. Washington on August 8, 2024, provides for the sale of up to 5,000 shares of Company Class A common stock and will remain in effect until the earlier of (1)November 12, 2025; (2) the first date on which all trades have been executed or all orders relating to such trades have expired; (3) upon written notice by Ms. Washington or the broker to terminate or modify the Rule 10b5-1 trading arrangement.

During the fiscal quarter covered by this Quarterly Report on Form 10-Q, a Rule 10b5-1 trading arrangement previously adopted on September 7, 2023 for Karsten Winther, President EMEA of the Company (the "Winther 10b5-1 Plan"), terminated pursuant to its terms. The Winther 10b5-1 Plan was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act and provided for the potential sale of up to 44,924 shares of Company Class A common stock.