Exhibit 4.1



BKI COMMON   STOCK COMMON STOCK CUSIP 09215C 10 SEE REVERSE FOR CERTAIN DEFINITIONS Common   Stock, Par Value $0.0001 per share 5 This Certifies that is the owner of   FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, PAR VALUE $0.0001 PER SHARE,   OF Black Knight, Inc. (hereinafter called the “Corporation”) transferable on   the books of the Corporation bythe holder hereof in person or by duly   authorized attorney, upon surrender of this certificate properly endorsed.   This certificate is not valid unless countersigned and registered by the   Transfer Agent and Registrar. In Witness Whereof, the Corporation has caused   this certificate to be signed by the facsimile signatures of its duly   authorized officers of the Corporation. DATED: CHIEF EXECUTIVE OFFICER   CORPORATE SECRETARY COUNTERSIGNED AND REGISTERED: CONTINENTAL STOCK TRANSFER   & TRUST COMPANY (NEW YORK, NY) TRANSFER AGENT AND REGISTRAR BY:   AUTHORIZED OFFICER ABnote North America 711 ARMSTRONG LANE, COLUMBIA, TN   38401 (931) 388-3003 SALES: HOLLY GRONER 931-490-7660 PROOF OF: AUGUST 29,   2017 BLACK KNIGHT, INC. WO - 17000087 FACE OPERATOR: DKS REV. 2 COLORS   SELECTED FOR PRINTING: INTAGLIO PRINTS IN SC-7 DARK BLUE. LOGO PRINTS IN 2   COLORS: PMS 117 GOLD AND PROCESS BLACK. PLEASE INITIAL THE APPROPRIATE   SELECTION FOR THIS PROOF: OK AS IS OK WITH CHANGES MAKE CHANGES AND SEND   ANOTHER PROOF 


    




 






 



The following   abbreviations, when used in the inscription on the face of this certificate,   shall be construed as though they were written out in full according to   applicable laws or regulations: UNIF GIFT MIN ACT– CUSTODIAN TEN COM TEN ENT   JT TEN – as tenants in common – as tenants by the entireties – as joint   tenants with right of survivorship and not as tenants in common (Cust) under   Uniform Gifts to Minors (Minor) Act (State) Additional abbreviations may also   be used though not in the above list. For Value Received, hereby sell,   assign, and transfer unto PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING   NUMBER OF ASSIGNEE (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP   CODE, OF ASSIGNEE) Shares of the Common Stock represented by the within   certificate, and do hereby irrevocably constitute and appoint Attorney to   transfer the said stock on the books of the within named Corporation with   full power of substitution in the premises. Dated THE SIGNATURE TO THIS   ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF NOTICE:   THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY   CHANGE WHATEVER. Signature(s) Guaranteed: THE SIGNATURE(S) MUST BE GUARANTEED   BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN   ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE   GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15. KEEP THIS   CERTIFICATE IN A SAFE PLACE, IF IT IS LOST, STOLEN, MUTILATED OR DESTROYED,   THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE   ISSUANCE OF A REPLACEMENT CERTIFICATE. PLEASE INITIAL THE APPROPRIATE   SELECTION FOR THIS PROOF: OK AS IS OK WITH CHANGES MAKE CHANGES AND SEND   ANOTHER PROOF ABnote North America 711 ARMSTRONG LANE, COLUMBIA, TN 38401   (931) 388-3003 PROOF OF: AUGUST 23, 2017 BLACK KNIGHT, INC. WO - 17000087   BACKOPERATOR: DKS SALES: HOLLY GRONER 931-490-7660 REV. 1