ZoomInfo Technologies Inc.

Except as described in the two immediately following paragraphs, during the Company’s fiscal quarter ended March 31, 2025, none of the Company’s directors or officers (as defined in Rule 16a-1(f) under the Exchange Act)adopted orterminated a trading arrangement intended to satisfy the affirmative conditions of Rule 10b5-1(c) of the Exchange Act (such arrangement, a “Rule 10b5-1 trading arrangement”).

On February 27, 2025, Ashley McGrane, Executive Vice President, General Counsel and Corporate Secretary of the Company, adopted a Rule 10b5-1 trading arrangement. The duration of the Rule 10b5-1 trading arrangement commences on June 1, 2025, and ends on December 15, 2025. The Rule 10b5-1 trading arrangement provides for the sale of a portion of the net shares acquired by Ms. McGrane (net of shares withheld to cover the recipient’s tax liability in connection with vesting) resulting from (i) the vesting (if applicable) of up to 62,550 previously granted restricted stock units, including 608 HSKB Phantom Units and (ii)4,029 shares of Common Stock comprising previously vested restricted stock units and shares of Common Stock previously purchased through the Company’s ESPP. The volume of sales will be determined, in part, based on pricing triggers outlined in the Rule 10b5-1 trading arrangement, and solely with respect to the shares to be received upon the vesting of awards contemplated in clause (i) of the immediately preceding sentence, such sales will be subject to a maximum potential sale limit under the plan ranging from 9.5% to 31.0% of the vested shares. Ms. McGrane’s Rule 10b5-1 trading arrangement was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act and the Company’s policies regarding insider transactions.

On March 6, 2025, James Roth, Chief Revenue Officer of the Company, adopted a Rule 10b5-1 trading arrangement. The duration of the Rule 10b5-1 trading arrangement commences on June 5, 2025, and ends on December 31, 2025. The Rule 10b5-1 trading arrangement provides for the sale of a portion of the net shares acquired by Mr. Roth (net of shares withheld to cover the recipient’s tax liability in connection with vesting) resulting from the vesting of up to a maximum of 204,210 previously granted restricted stock units. The volume of sales will be determined, in part, based on pricing triggers outlined in the Rule 10b5-1 trading arrangement, with a maximum potential sale under the plan of up to 50% of the vested shares from such awards during the term of the plan. Mr. Roth’s Rule 10b5-1 trading arrangement was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act and the Company’s policies regarding insider transactions.