X0306 4/A 2021-09-02 2021-09-07 0 0001794515 ZoomInfo Technologies Inc. ZI 0001813217 Schuck Henry C/O ZOOMINFO TECHNOLOGIES INC. 805 BROADWAY STREET, SUITE 900 VANCOUVER WA 98660 1 1 1 0 Chief Executive Officer LLC Units of ZoomInfo Holdings LLC Class A Common Stock 386020 24640656 I See Footnote Pursuant to the terms of the limited liability company agreement for ZoomInfo Holdings LLC ("OpCo"), limited liability company units of OpCo ("OpCo Units") and an equal number of shares of the Issuer's Class B common stock ("Class B Common Stock"), together are exchangeable for shares of Issuer's Class A common stock on a one-for-one basis at the discretion of DO Holdings (WA), LLC, subject to exchange rate adjustments for stock splits, stock dividends, and reclassifications. These exchange rights do not expire. Shares of Class B Common Stock have no economic value and have 10 votes per share. Reflects the Reporting Person's proportionate pecuniary interest in the securities held directly by DO Holdings (WA), LLC. On September 7, 2021, the Reporting Person filed a Form 4 inadvertently reporting the Reporting Person's proportionate pecuniary interest in OpCo Units held directly by DO Holdings (WA), LLC as 24,692,054 units. In fact, the Reporting Person's proportionate pecuniary interest in OpCo Units held directly by DO Holdings (WA), LLC was 24,640,656 units. Reflects securities held directly by DO Holdings (WA), LLC. DO Holdings (WA), LLC is owned by Henry Schuck and Kirk Brown. The Reporting Person may be deemed to share voting and dispositive power over the securities held by DO Holdings (WA), LLC. /s/ Anthony Stark, as Attorney-in-Fact 2021-11-02