144 0001306507 XXXXXXXX LIVE 0001799208 Dun & Bradstreet Holdings, Inc. 001-39361 5335 Gate Parkway, Jacksonville FL 32256 904-648-8006 Chinh Chu Director Common Stock J.P. Morgan Securities LLC

390 Madison Avenue - 6th Floor New York NY 10017

10885403 97642064.91 446424575 05/08/2025 NYSE Common Stock Merrill Lynch, Pierce, Fenner & Smith Incorporated

One Bryant Park New York NY 10036

47466 425770.02 446424575 05/09/2025 NYSE Common Stock Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

19139 171676.83 446424575 05/09/2025 NYSE Common Stock 07/06/2020 Initial public offering Dun & Bradstreet Holdings, Inc. N 527251 07/06/2020 Cash Common Stock 08/12/2021 Vesting of restricted common stock Dun & Bradstreet Holdings, Inc. N 23193 08/12/2021 Equity compensation Common Stock 03/31/2021 Share distribution CC DNB Holdings LP N 10807376 03/31/2021 Cash Common Stock 03/10/2022 Vesting of restricted common stock Dun & Bradstreet Holdings, Inc. N 5680 03/10/2022 Equity compensation Common Stock 03/10/2023 Vesting of restricted common stock Dun & Bradstreet Holdings, Inc. N 7540 03/10/2023 Equity compensation Common Stock 03/10/2024 Vesting of restricted common stock Dun & Bradstreet Holdings, Inc. N 11053 03/10/2024 Equity compensation Common Stock 03/11/2025 Vesting of restricted common stock Dun & Bradstreet Holdings, Inc. N 19139 03/11/2025 Equity compensation Y Securities consist of (i) 10,885,403 shares of Common Stock held by CC Star Holdings, L.P. and (ii) 66,605 shares of Common Stock held by Chinh Chu. Chinh Chu controls the investment decisions and voting powers of CC Star Holdings, L.P. 05/08/2025 /s/ Chinh Chu