PROSPECTUS SUPPLEMENT File No. 333-68747
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(To Prospectus and Prospectus Supplement dated May 6, 1999) Rule 424(b)(3)
Prospectus number: 1944
Merrill Lynch & Co., Inc.
Medium-Term Notes, Series B
Due Nine Months or More from Date of Issue
Floating Rate Notes
Principal Amount: $115,000,000 Original Issue Date: April 12, 2000
CUSIP Number: 59018S 5U4 Stated Maturity Date: October 15, 2001
Interest Calculation: Day Count Convention:
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|x| Regular Floating Rate Note |x| Actual/360
| | Inverse Floating Rate Note | | 30/360
(Fixed Interest Rate): | | Actual/Actual
Interest Rate Basis:
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| | LIBOR | | Commercial Paper Rate
| | CMT Rate | | Eleventh District Cost of Funds Rate
| | Prime Rate | | CD Rate
|x| Federal Funds Rate | | Other (see attached)
| | Treasury Rate
Designated CMT Page: Designated LIBOR Page:
CMT Telerate Page: LIBOR Telerate Page:
CMT Reuters Page: LIBOR Reuters Page:
Index Maturity: N/A Minimum Interest Rate: Not Applicable
Spread: 0.270% Maximum Interest Rate: Not Applicable
Initial Interest Rate: TBD Spread Multiplier: Not Applicable
Interest Reset Dates: Daily, commencing April 12, 2000 through the maturity
date; subject to modified following business day
convention
Interest Payment Dates: Quarterly, on the 15th of July, October, January and
April, commencing July 15, 2000; 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: The Chase Manhattan Bank
Dated: April 7, 2000
