Exhibit 4.1



LB INCORPORATED   UNDER THE LAWS OF THE STATE OF CALIFORNIA CUSIP 550550 10 7 SEE REVERSE FOR   CERTAIN DEFINITIONS This certifies that is the record holder of FULLY PAID   AND NONASSESSABLE SHARES OF COMMON STOCK, NO PAR VALUE PER SHARE, OF Luther   BurBank Corporation transferable on the books of the corporation in person or   by duly authorized attorney upon surrender of this Certificate properly   endorsed. This Certificate is not valid until countersigned by the Transfer   Agent and registered by the Registrar. WITNESS the facsimile seal of the   Corporation and the facsimile signatures of its duly authorized officers.   Dated: President Chief Financial Officer MAY 14, 1991 COUNTERSIGNED AND   REGISTERED: AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC (NEW YORK, NY)   TRANSFER AGENT AND REGISTRAR BY: AUTHORIZED SIGNATURE 


    




 










A statement of   the rights, preferences, privileges and restrictions granted to or imposed   upon the respective classes or series of shares and upon the holders thereof   as established, from time to time, by the Articles of Incorporation of the   Corporation and by any certificate of determination, and the number of shares   constituting each class and series and the designations thereof, may be   obtained by the holder hereof upon written request and without charge from   the Secretary of the Corporation at its corporate headquarters. 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: 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 as community property UNIF GIFT MIN ACT –   ......................... Custodian ......................... (Cust) under   Uniform Gifts to Minors (Minor)   Act..............................................................................   (State) UNIF TRF MIN ACT – ................. Custodian (until age   ..................) (Cust) .............................................   under Uniform Transfers (Minor) to Minors   Act............................................................ (State) COM   PROP – Additional abbreviations may also be used though not in the above   list. FOR VALUE RECEIVED, hereby sell(s), assign(s) and transfer(s) 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 capital stock represented by within Certificate, and do hereby   irrevocably constitute and appoint attorney-in-fact to transfer the said   stock on the books of the within named Corporation with full power of the   substitution in the premises. Dated X NOTICE:THE SIGNATURE TO THIS ASSIGNMENT   MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN   EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATSOEVER.   Signature(s) Guaranteed: By THE SIGNATURE(S) SHOULD 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.