X0306 4 2022-03-10 0001799208 Dun & Bradstreet Holdings, Inc. DNB 0001260943 THOMAS H. LEE ADVISORS, LLC C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001718537 Thomas H. Lee Equity Fund VIII, L.P. C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001718511 Thomas H. Lee Parallel Fund VIII, L.P. C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001756407 THL FUND VIII COINVESTMENT PARTNERS, L.P. C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001718514 THL Executive Fund VIII, L.P. C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001816685 THL Equity Fund VIII Investors (D&B), L.P. C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001757180 THL EQUITY ADVISORS VIII, LLC C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001260945 THOMAS H LEE PARTNERS LP 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001757240 THL MANAGERS VIII, LLC C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true 0001757181 THL HOLDCO, LLC C/O THOMAS H. LEE PARTNERS, L.P. 100 FEDERAL STREET, 35TH FLOOR BOSTON MA 02110 true true Class A Common Stock 57867617 I See Footnotes Class A Common Stock 2022-03-10 4 A 0 7540 0 A 18052 D Class A Common Stock 2022-03-10 4 A 0 7540 0 A 18052 D See Exhibit 99.1 for text of footnote (1). See Exhibit 99.1 for text of footnote (2). See Exhibit 99.1 for text of footnote (3). See Exhibit 99.1 for text of footnote (4). See Exhibit 99.1 for text of footnote (5 See Exhibit 99.1 for text of footnote (6). See Exhibit 99.1 for text of footnote (7). Exhibit 99.1 (Form 4 Footnotes) and Exhibit 99.2 (Joint Filer Information) are incorporated herein by reference. This Form 4 is the first of two Forms 4 being filed relating to the same event. The Form 4 has been split into two filings because there are more than 10 Reporting Persons in total, and the SEC's EDGAR filing system limits a single Form 4 to a maximum of 10 Reporting Persons. Each Form 4 will be filed by Designated Filer Thomas H. Lee Advisors, LLC. ** See Exhibit 99.2 for Signatures 2022-03-14