Merrill Lynch & Co., Inc.
                                                   95 Greene Street
                                                   Jersey City, New Jersey 07302

                                                   November 25, 2003

[LOGO] MERRILL LYNCH

OFICS Filer Support
SEC Operations Center
6432 General Green Way
Alexandria, Virginia 22312-2413

Attention: 1933 Act Filing Desk

Re: Registration Statement No. 333-105098

With reference to the above captioned Registration Statement and in compliance
with Rule 424(b)(3) adopted under the Securities Act of 1933, as amended, we
enclose herewith for filing, one copy, marked as required, one Prospectus
Supplement and Prospectus dated June 3, 2003 relating to Merrill Lynch & Co.,
Inc. Medium-Term Notes, Series B to be used on and after this date. In addition,
please reference that this note is not listed on any exchange.

                                       Very truly yours,

                                       /s/ Mark Youngclaus

                                       Mark Youngclaus
                                       Vice President

PRICING SUPPLEMENT                                           File No. 333-105098
(To Prospectus Supplement and                                     Rule 424(b)(3)
Prospectus dated June 3, 2003)
Prospectus Supplement Number: 2345

                            Merrill Lynch & Co., Inc.
                           Medium-Term Notes, Series B
                   Due Nine Months or More from Date of Issue

                               Floating Rate Notes

Principal Amount: $15,750,000      Original Issue Date: November 24, 2003

CUSIP Number: 59018YSJ1            Stated Maturity Date: January 15, 2009

Issue Price: 100.00%

Interest Calculation:              Day Count Convention:
[X] Regular Floating Rate Note     [X] Actual/360
[ ] Inverse Floating Rate Note     [ ] 30/360
    (Fixed Interest Rate):         [ ] Actual/Actual

Interest Rate Basis:
[X] LIBOR                          [ ] Commercial Paper Rate
[ ] CMT Rate                       [ ] Eleventh District Cost of Funds Rate
[ ] Prime Rate                     [ ] CD Rate
[ ] Federal Funds Rate             [ ] Other (see attached)
[ ] Treasury Rate
    Designated CMT Page:               Designated LIBOR Page:
      CMT Moneyline Telerate Page:       LIBOR Moneyline Telerate Page: 3750
                                         LIBOR Reuters Page:

Index Maturity:         Three Month       Minimum Interest Rate: Not Applicable

Spread:                 +0.24%            Maximum Interest Rate: Not Applicable

Initial Interest Rate:  Calculated as     Spread Multiplier: Not Applicable
                        if the Original
                        Issue Date was
                        an Interest Reset
                        Date

Interest Reset Dates:   Quarterly, on the 15th of January, April, July and
                        October, commencing on January 15, 2004, subject to
                        modified following Business Day convention.

Interest Payment Dates: Quarterly, on the 15th of January, April, July and
                        October, commencing on January 15, 2004, subject to
                        modified following Business Day convention.
Repayment at the
Option of the Holder:   The Notes cannot be repaid prior to the Stated Maturity
                        Date.

Redemption at the
Option of the Company:  The Notes cannot be redeemed prior to the Stated
                        Maturity Date.

Form:                   The Notes are being issued in fully registered
                        book-entry form.

Trustee:                JPMorgan Chase Bank

Underwriting Discount:  0.05%

Dated:                  November 19, 2003