X0306 4 2022-02-15 0 0001799208 Dun & Bradstreet Holdings, Inc. DNB 0001627014 Black Knight, Inc. 601 RIVERSIDE AVENUE JACKSONVILLE FL 32204 1 0 1 0 0001817551 Black Knight Financial Services, Inc. C/O BLACK KNIGHT, INC. 601 RIVERSIDE AVE JACKSONVILLE FL 32204 1 0 1 0 0001597879 Black Knight Financial Services, LLC C/O BLACK KNIGHT, INC. 601 RIVERSIDE AVENUE JACKSONVILLE FL 32204 1 0 1 0 0001429775 Black Knight InfoServ, LLC C/O BLACK KNIGHT, INC. 601 RIVERSIDE AVE JACKSONVILLE FL 32204 1 0 1 0 Common Stock 2022-02-15 4 S 0 36376360 19.86 D 18473610 I See Notes Shares of Common Stock transferred to Cannae Holdings, LLC ("Cannae") and certain investment entities affiliated with Thomas H. Lee Partners, L.P. ("THL") by a wholly owned subsidiary of Black Knight, Inc. ("Black Knight"), in connection with its acquisition of the outstanding interests of Optimal Blue Holdco, LLC pursuant to the Purchase Agreement, dated February 15, 2022, by and among Black Knight, Optimal Blue I, LLC, Optimal Blue Holdco, LLC, Cannae, THL and Black Knight Technologies, LLC. This report is filed by Black Knight, Black Knight Financial Services, Inc. ("BKFS Inc."), Black Knight Financial Services, LLC ("BKFS LLC") and Black Knight InfoServ, LLC ("InfoServ") (each, a "Reporting Person"). Black Knight is the sole stockholder of BKFS Inc., which in turn is the sole member of BKFS LLC, which in turn is the sole member of InfoServ. Solely for purposes of Section 16 of the Exchange Act, each Reporting Person may be deemed a "director by deputization". All shares of Common Stock are held directly by InfoServ, and are held indirectly by each of BKFS LLC, BKFS Inc. and Black Knight. Exhibit 99.1 (Joint Filer Information) is incorporated herein by reference. See Exhibit 99.1 for Signatures 2022-02-17