AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON April 9, 2003

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                               (Amendment No. 1 )

                             ALLEGIANT Bancorp, INC.

--------------------------------------------------------------------------------
                                (Name of Issuer)

                         Common Stock ($0.01 par value)

--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   017476 10 2
                      -------------------------------------
                                 (CUSIP Number)

                                 March 31, 2003
                      -------------------------------------
             (Date of Event Which Requires Filing of this Statement)

         Check the  appropriate box to designate the rule pursuant to which this
Schedule is filed:

                [ ]   Rule 13d-1 (b)
                |X|   Rule 13d-1 (c)
                [ ]   Rule 13d-1 (d)

         *The  remainder  of this cover page shall be filled out for a reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

         The information  required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).





CUSIP NO.  017476 10 2

1    NAME OF REPORTING PERSONS

         First Banks, Inc.
         IRS Employer Identification No. 43-1175538

2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                              (a) ---
                                              (b) ---

3    SEC USE ONLY

4    CITIZENSHIP OR PLACE OF ORGANIZATION

              Missouri

                                              5     SOLE VOTING POWER
NUMBER OF SHARES                                             231,779
BENEFICIALLY OWNED
BY EACH REPORTING                             6     SHARED VOTING POWER
PERSON WITH                                                     0

                                              7     SOLE DISPOSITIVE POWER
                                                             231,779

                                              8     SHARED DISPOSITIVE POWER
                                                                0

9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
              231,779 shares

10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]

11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
              1.4%

12   TYPE OF REPORTING PERSON (See Instructions)
              CO








ITEM 1     (A) NAME OF ISSUER:

           Allegiant Bancorp, Inc.

           (B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

           10401 Clayton Road
           St. Louis, Missouri 63131

ITEM 2     (A) NAME OF PERSON FILING:

         The name of the person filing this statement (the  "Reporting  Person")
is First Banks, Inc.

ITEM 2     (B) ADDRESS OF PRINCIPAL BUSINESS OFFICE:

         The address of the principal business office of the Reporting Person is
135 North Meramec, Clayton, MO 63105.

ITEM 2     (C) CITIZENSHIP:

         First Banks, Inc. is a registered bank holding company  incorporated in
Missouri and headquartered in St. Louis, County, Missouri

ITEM 2     (D) TITLE OF CLASS OF SECURITIES:

         This statement relates to Common Shares of the Issuer ("Stock").

ITEM 2     (E) CUSIP NUMBER:   017476 10 2

ITEM 3   IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1(B) OR
                13D-2(B), CHECK WHETHER THE PERSON FILING IS A:

         (a)-(j) Not Applicable

ITEM 4     OWNERSHIP:

         As of March 21, 2003, the Issuer had 16,205,777  Shares of Common Stock
outstanding, $0.01 par value according to the Form 10-K filed for the year ended
December 31, 2002.

         (a)-(b) The Reporting  Person owns 231,779  Shares,  which  constitutes
approximately 1.43% of the Shares outstanding as of March 21, 2003.

         (c) The  Reporting  Person  has the sole power to dispose or direct the
disposition of and the sole power to vote or direct the vote of 231,779 Shares.

ITEM 5     OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

         If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [ X }.

ITEM 6     OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

         This item is not applicable.


ITEM 7     IDENTIFICATION  AND CLASSIFICATION OF THE SUBSIDIARIES WHICH ACQUIRED
           THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

         This item is not applicable.

ITEM 8     IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF A GROUP.

         This item is not applicable.

ITEM 9     NOTICE OF DISSOLUTION OF GROUP.

         This item is not applicable.






ITEM 10    CERTIFICATION.

         By  signing  below I  certify  that,  to the best of my  knowledge  and
belief, the securities  referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing  the control of the
issuer of the  securities  and were not acquired and are not held in  connection
with or as a participant in any transaction having that purpose or effect.

                                   SIGNATURES

         After  reasonable  inquiry and to the best of my knowledge  and belief,
the  undersigned  certifies that the  information set forth in this statement is
true, complete and correct.

Date: April 9, 2003


                                          FIRST BANKS, INC.

                                          /s/ Allen H. Blake
                                          --------------------------------------
                                              Allen H. Blake
                                              President, Chief Financial Officer
                                              and Secretary