PROSPECTUS SUPPLEMENT File No. 333-68747
(To the Prospectus and Prospectus Supplement dated May 6, 1999) Rule 424(b)(3)
Prospectus number: 1979
Merrill Lynch & Co., Inc.
Medium-Term Notes, Series B
Due Nine Months or More from Date of Issue
Floating Rate Notes
Principal Amount: $45,000,000 Original Issue Date: June 12, 2000
CUSIP Number: 59018S 7E8 Stated Maturity Date: June 11, 2002
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 Telerate Page: LIBOR Telerate Page:
CMT Reuters Page: LIBOR Reuters Page:
Index Maturity: Three Months Minimum Interest Rate: Not Applicable
Spread: 0.1300% Maximum Interest Rate: Not Applicable
Initial Interest Rate: TBD Spread Multiplier: Not Applicable
Interest Reset Dates: Quarterly, on the 11th of every March, June, September
and December, commencing September 11, 2000, subject
to modified following business day convention.
Interest Payment Dates: Quarterly, on the 11th of every March, June, September
and December, commencing September 11, 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: May 31, 2000
