<PAGE>
FILE NO. 333-59997
RULE 424(B)(3)
PROSPECTUS SUPPLEMENT
(TO PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 30, 1998)
PROSPECTUS NUMBER: 1803
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: $50,000,000
CUSIP NUMBER: 59018S U69
INTEREST RATE: 6.25000%
ORIGINAL ISSUE DATE: December 21, 1998
STATED MATURITY DATE: December 21, 2013
INTEREST PAYMENT DATES: 21st day of each month commencing January 21, 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: December 21, 2002
OTHER PROVISIONS: The Notes are subject to redemption at the option of ML&Co., in whole,
semi-annually on each June 21 and December 21 commencing December 21, 2002,
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: December 7, 1998
</TABLE>
