Form SCHEDULE 13D/A ZoomInfo Technologies Filed by: HighSage Ventures LLC

Item 3 of the Schedule 13D is hereby amended and supplemented as follows: Item 5(c) of this Amendment No. 1 is incorporated by reference herein. A total of $22,893,875, excluding commissions, was paid to acquire the shares of Common Stock purchased since the Original Schedule 13D and reported in Item 5(c) of this Amendment No. 1. The shares of Common Stock were purchased with the working capital of various limited liability companies managed by the Reporting Persons. The Reporting Persons may effect purchases of the shares of Common Stock through margin accounts maintained for the limited liability companies with prime brokers, which extend margin credit as and when required to open or carry positions in their margin accounts, subject to applicable federal margin regulations, stock exchange rules, and such firms' credit policies. Positions in the shares of Common Stock may be held in margin accounts and may be pledged as collateral security for the repayment of debit balances in such accounts. Since other securities may be held in such margin accounts, it may not be possible to determine the amounts, if any, of margin used to purchase the shares of Common Stock.

Item 5(a) of the Schedule 13D is hereby amended and supplemented as follows: As of the date hereof, HighSage Ventures LLC may be deemed to beneficially own 14,479,835 shares of Common Stock, or approximately 4.7% of the shares of Common Stock outstanding. As of the date hereof, Ms. Stier may be deemed to beneficially own 20,410,148 shares of Common Stock, or approximately 6.7% of the shares of Common Stock outstanding. The percentages set forth herein are based on 305,294,644 shares of Common Stock outstanding as of January 31, 2026, as reported in the Issuer's annual report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Commission on February 12, 2026. Separate from the Reporting Persons, Owen Wurzbacher ("Mr. Wurzbacher"), who serves as Chief Investment Officer of HighSage Ventures LLC and also serves on the Issuer's Board, beneficially owns a total of 53,242 shares and restricted stock units ("RSUs"), including 38,852 which were granted to him in connection with his service on the Issuer's Board. The Reporting Persons are not a "group", as such term is used for purposes of Section 13(d) of the Act, with Mr. Wurzbacher and disclaim beneficial ownership over the shares and RSUs beneficially owned by Mr. Wurzbacher. The filing of this Schedule 13D shall not be construed as an admission that the Reporting Persons are, for the purposes of Section 13(d) of the Act, the beneficial owner of any securities owned by Mr. Wurzbacher.

Item 5(b) of the Schedule 13D is hereby amended and supplemented as follows: The Reporting Persons may be deemed to share the power to vote or direct the voting of, and the power to dispose or direct the disposition of, the 14,479,835 shares of Common Stock beneficially owned by HighSage Ventures LLC with the limited liability companies that directly hold such shares that are managed by HighSage Ventures LLC. Ms. Stier may be deemed to share the power to vote or direct the voting of, and the power to dispose or direct the disposition of, the 20,410,148 shares of Common Stock beneficially owned by Ms. Stier with HighSage Ventures LLC and/or the limited liability companies that directly hold such shares that she and/or HighSage Ventures LLC manages.

Item 5(c) of the Schedule 13D is hereby amended and supplemented as follows: On February 11, 2026, limited liability companies managed by HighSage Ventures LLC purchased 2,000,000 shares of Common Stock in multiple open market transactions at prices ranging from $6.4801 to $6.8646, inclusive. The weighted average purchase price for the transactions was $6.6704 per share. On February 12, 2026, a limited liability company managed by Ms. Stier purchased 1,000,000 shares of Common Stock in multiple open market transactions at prices ranging from $6.3338 to $6.3599, inclusive. The weighted average purchase price for the transactions was $6.35 per share. On February 13, 2026, a limited liability company managed by Ms. Stier purchased 500,000 shares of Common Stock in multiple open market transactions at prices ranging from $6.3994 to $6.413, inclusive. The weighted average purchase price for the transactions was $6.4062 per share. Except as otherwise set forth herein, the Reporting Persons have not effected any transactions in the Common Stock during the past 60 days.