<PAGE>
FILE NO. 333-68747
RULE 424(B)(3)
PROSPECTUS SUPPLEMENT
(TO PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED MAY 6, 1999)
PROSPECTUS NUMBER: 1881
MERRILL LYNCH & CO., INC.
MEDIUM-TERM NOTES, SERIES B
DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
CALLABLE FIXED RATE NOTES
<TABLE>
<CAPTION>
<S> <C>
PRINCIPAL AMOUNT: $25,000,000
CUSIP NUMBER: 59018S 3H5
INTEREST RATE: 7.05000%
ORIGINAL ISSUE DATE: August 11, 1999
STATED MATURITY DATE: August 11, 2009
INTEREST PAYMENT DATES: 11th day of each month commencing September 11, 1999, through and
including the Stated Maturity Date, subject to the 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 may be redeemed prior to the Stated Maturity Date, See "Other
Provisions"
INITIAL REDEMPTION DATE: August 11, 2004
OTHER PROVISIONS: The Notes are subject to redemption at the option of ML&Co., in whole,
semi-annually on each February 11 and August 11 commencing August 11,
2004, at a redemption price equal to 100% of the principal amount of the
Notes upon at least 30 days prior notice.
FORM: The Notes are being issued in fully registered book-entry form.
TRUSTEE: The Chase Manhattan Bank
DATED: July 27, 1999
</TABLE>
